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4.7/5
based on 374 client reviews
  2. Development & IT Talent
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  4. (Current) JUnit Specialists
  • $30 hourly

    • 4.7/5
    • (45 jobs)
    A motivated and skilled software developer with more than five years of professional experience. Back-end technologies: - Spring-framework, spring-security - JPA/Hibernate + Spring-Data - REST, GraphQL, and WebServices (Spring-Boot) - Apache Kafka, Camel - SQL, MySQL, PostgreSQL, MariaDB, MongoDB - Maven/Gradle/Ant Front-end technologies: - Spring-MVC, Struts - template engines: Thymeleaf, JSP/JSTL, GSP, Freemarker, Jtwig, Velocity - JQuery and Bootstrap - HTML5, CSS3, JavaScript - Angular, React SDLC - Agile and Scrum programming methodology - TDD using JUnit, Mockito, Karma (for UI) - Eclipse, STS and Intellij IDEA - Git, SVN, and CVS code repositories - Maven, Ant, and Gradle build tools - Jenkins and Bamboo CI servers - Docker, Kubernetes - Bash scripting, Server Administration Cloud - Amazon cloud deployment using EC2 - Amazon file sharing S3 - Amazon cloud database using RDS - Amazon based messaging (SNS and SQS) - Google cloud platform - Heroku based could deployment - VPS setup and administration
    vsuc_fltilesrefresh_TrophyIcon JUnit
    Jira
    Code Review
    Agile Project Management
    Hibernate
    Java Persistence API
    Microservice
    Thymeleaf
    REST
    MongoDB
    Bash Programming
    MySQL
    Spring MVC
    Spring Boot
    Java
  • $60 hourly

    • 5.0/5
    • (7 jobs)
    10+ years as Senior Java Engineer. Accenture, Credit Suisse & Unibet ex-employee. Skilled in Java 11, Spring Boot, REST APIs, Web Applications, Relational & NoSQL Databases, Scrum, AWS, Angular, Docker. I also worked as a consultant on complex projects for investment banks - Barclays Capital, Deutsche Bank and Citi. Great experience with: ⇨ Java stack: Java 11, Spring Boot, Spring Security, Spring Data, Spring MVC, Spring Cloud, JPA/Hibernate, Spring Hateoas ⇨ REST API: design and development, documentation (swagger) ⇨ Databases/ORMs: Oracle, MSSQL, MySQL, PostgreSQL ⇨ Messaging: JMS, ActiveMQ, Tibco, Kafka ⇨ NoSQL: MongoDB ⇨ AWS: EC2, S3, SQS, Route 53, IAM, Lambda ⇨ DevOps and Infrastructure: Bamboo, TeamCity, Linux, Docker, Docker Swarm, DockerHub, Ant, Apache Maven/Gradle, Jenkins, GitLab, GitLab CI, GitHub, BitBucket, Sentry.io, ELK, SonarQube, Git, SVN ⇨ Frontend: HTML/CSS, JavaScript, JQuery, Angular, npm, gulp ⇨ Other Java libraries: RestAssured, JUnit/Mockito/PowerMock, Lombok, FreeMarker/Thymeleaf/Velocity, DropWizard, Jackson/Gson
    vsuc_fltilesrefresh_TrophyIcon JUnit
    CI/CD
    Amazon Web Services
    Spring MVC
    Java Persistence API
    Hibernate
    API
    Spring Boot
    RESTful API
    SQL
    Docker
    Web Application
    AngularJS
    Java
    MySQL
    Spring Framework
  • $55 hourly

    • 5.0/5
    • (6 jobs)
    I am a senior Java/SpringBoot developer, working in complex enterprise software. Most used stack: SpringBoot, JEE, JSF, Angular, Primefaces, Icefaces, Hibernate, Maven, JBoss, Git, Jira, Openshift, AWS Following: Java best practices, SOLID clean code, TDD Certified Professional for Software Architecture, iSAQB CPSA Certification Oracle Certified Associate, Java SE 8 Programmer Professional Scrum Master I (PSM I) Bachelor and Master Degree in IT and Business, many courses taken in SW Development and Best Practices. Passionate about Bioinformatics and AI. My hobby is writing, creative or professional writing. I have published a book and won multiple international awards in short stories competitions. I am also an author at Baeldung, writing Java/Spring articles.
    vsuc_fltilesrefresh_TrophyIcon JUnit
    Software Architecture & Design
    API
    Git
    REST
    Spring MVC
    JavaFX
    Oracle PLSQL
    SQL
    Java Persistence API
    Apache Maven
    Hibernate
    Java EE
    Spring Framework
    Spring Boot
  • $30 hourly

    • 4.8/5
    • (171 jobs)
    🥇 𝑻𝒐𝒑 𝟏% 𝒐𝒇 𝑸𝑨 𝑭𝒓𝒆𝒆𝒍𝒂𝒏𝒄𝒆𝒓𝒔 𝒐𝒏 𝑼𝒑𝒘𝒐𝒓𝒌 𝑷𝒍𝒂𝒕𝒇𝒐𝒓𝒎 🥇𝑻𝑶𝑷 𝑹𝒂𝒕𝒆𝒅 𝑷𝑳𝑼𝑺 𝒔𝒊𝒏𝒄𝒆 𝟐𝟎𝟐𝟎 & 𝑻𝑶𝑷 𝑹𝒂𝒕𝒆𝒅 𝒔𝒊𝒏𝒄𝒆 𝟐𝟎𝟏𝟕 𝑰 𝒂𝒎 𝒂 𝒇𝒖𝒍𝒍-𝒕𝒊𝒎𝒆, 𝒅𝒆𝒅𝒊𝒄𝒂𝒕𝒆𝒅, 𝒔𝒆𝒍𝒇-𝒅𝒓𝒊𝒗𝒆𝒏, 𝒅𝒆𝒕𝒂𝒊𝒍-𝒐𝒓𝒊𝒆𝒏𝒕𝒆𝒅 Project Manager and 𝑸𝑨 𝒇𝒓𝒆𝒆𝒍𝒂𝒏𝒄𝒆𝒓 𝒘𝒊𝒕𝒉 15+ 𝒚𝒆𝒂𝒓𝒔 𝒐𝒇 𝒉𝒂𝒏𝒅𝒔-𝒐𝒏 𝒆𝒙𝒑𝒆𝒓𝒊𝒆𝒏𝒄𝒆 𝒊𝒏 𝑴𝒂𝒏𝒖𝒂𝒍, 𝑨𝒖𝒕𝒐𝒎𝒂𝒕𝒊𝒐𝒏, 𝒂𝒏𝒅 𝑴𝒐𝒃𝒊𝒍𝒆 𝒕𝒆𝒔𝒕𝒊𝒏𝒈. 𝑰 𝒂𝒎 𝒔𝒆𝒓𝒗𝒊𝒏𝒈 𝒄𝒍𝒊𝒆𝒏𝒕𝒔 𝒐𝒏 𝑼𝒑𝒘𝒐𝒓𝒌 𝒇𝒓𝒐𝒎 𝒕𝒉𝒆 𝒆𝒓𝒂 𝒐𝒇 𝑶𝒅𝒆𝒔𝒌 𝒂𝒏𝒅 𝑬𝒍𝒂𝒏𝒄𝒆. 𝑻𝒆𝒔𝒕𝒊𝒏𝒈 𝒂𝒏𝒅 𝑸𝒖𝒂𝒍𝒊𝒕𝒚 𝒂𝒔𝒔𝒖𝒓𝒂𝒏𝒄𝒆 𝒊𝒔 𝒎𝒚 𝒑𝒂𝒔𝒔𝒊𝒐𝒏, 𝒂𝒏𝒅 𝑰 𝒆𝒏𝒋𝒐𝒚 𝒅𝒐𝒊𝒏𝒈 "𝑫𝑬𝑺𝑻𝑹𝑼𝑪𝑻𝑰𝑽𝑬 𝑪𝑹𝑬𝑨𝑻𝑰𝑶𝑵" 𝒕𝒐 𝒎𝒂𝒌𝒆 𝒂𝒑𝒑𝒍𝒊𝒄𝒂𝒕𝒊𝒐𝒏 𝒎𝒐𝒓𝒆 "𝑪𝑶𝑵𝑺𝑻𝑹𝑼𝑪𝑻𝑰𝑽𝑬". 𝑰 𝒄𝒂𝒏 𝒆𝒏𝒔𝒖𝒓𝒆 𝒕𝒉𝒂𝒕 𝒚𝒐𝒖𝒓 𝒂𝒑𝒑𝒍𝒊𝒄𝒂𝒕𝒊𝒐𝒏 𝒘𝒊𝒍𝒍 𝒘𝒐𝒓𝒌 𝒑𝒓𝒐𝒑𝒆𝒓𝒍𝒚 𝒂𝒏𝒅 𝒘𝒊𝒍𝒍 𝒉𝒂𝒗𝒆 𝒈𝒓𝒆𝒂𝒕 𝒆𝒏𝒅𝒖𝒓𝒂𝒏𝒄𝒆. So if you are willing to see your application FREE FROM BUGS 🐛🐛🐛, on time, then 𝐇𝐈𝐑𝐄 𝐌𝐄🚀🚀🚀 𝑴𝒚 𝑺𝒑𝒆𝒄𝒊𝒂𝒍𝒊𝒛𝒂𝒕𝒊𝒐𝒏: 𝑻𝒆𝒔𝒕𝒊𝒏𝒈: 🗹 Web application testing 🗹 Functional testing 🗹 Usability testing 🗹 UI/UX testing 🗹 WCAG 2.1 AA Compliance 🗹 WCAG 2.0 AA Compliance 🗹 Desktop testing 🗹 Security testing 🗹 Penetration testing 🗹 Grey testing 🗹 Responsiveness testing 🗹 Cross browser testing 🗹 Multiple platform testing 🗹 Smoke testing 🗹 Confirmation testing 🗹 Compatibility testing 🗹 Load testing ➡️ Jmeter 🗹 Performance testing 🗹 Automation Testing ➡️ Selenium Python ➡️ Playwright ➡️ Cypress 🗹 API Testing ➡️ Postman Automation testing expertise: 🗹 Creation of framework from scratch 🗹 Handling dynamic locators 🗹 UI assertion by image comparison 🗹 Jenkins CI/CD 🗹 Github, Bitbucket repository 🗹 Cross browser automation testing 🗹 Browser stack automation testing 🗹 My SQL, Oracle connectivity 🗹 Browser stack automation testing 🗹 RestAPI testing using postman 🗹 GraphQLAPI testing using playwright pytest 🗹 API Testing automation using postman 🗹 CI/CD integration of API postman tests 🗹 API testing using selenium. Playwright. 🗹 Postman Test runner 🗹 Postman monitor 🗹 Running test using postman newman 🗹 Junit Cucumber 🗹 BDD framework Programming and Query Languages: 🗹 Python 🗹 Java 🗹 MySQL 🗹 Javascript 🗹 Typescript Business Analyst and Project Management: 🗹 User stories 🗹 User Journey 🗹 Task creation 🗹 Task assignment 🗹 Task tracking 𝑫𝒆𝒍𝒊𝒗𝒆𝒓𝒂𝒃𝒍𝒆𝒔: 🗎 Bug reports—With clear steps, annotated screenshot, videos, and log files 🗎 Test closure report 🗎 Test cases/Test scenarios 🗎 Help documents 🗎 Test plan 𝑫𝒐𝒎𝒂𝒊𝒏 𝑬𝒙𝒑𝒆𝒓𝒕𝒊𝒔𝒆: ✅ Crypto Wallets ✅ Survey development and Testing ✅ NFT marketplace ✅ Property Management ✅ Affiliate Marketing ✅ e-learning/LMS ✅ eCommerce/POS ✅ Business Intelligence ✅ AI based ✅ Fintech ✅ HR tools ✅ SaaS ✅ Social media ✅ B2B ✅ B2C ✅ SaaS 𝑨𝒖𝒕𝒐𝒎𝒂𝒕𝒊𝒐𝒏 𝑻𝒆𝒔𝒕𝒊𝒏𝒈: ✅Appium-Java-POM ✅Cypress-JavaScript-POM✅Selenium-Java-Cucumber✅ Playwright-Pytest-POM ✅ Selenium-Python-POM ✅ Selenium-Python-traverse ✅API testing using Postman ✅ API testing using selenium ✅ API testing using playwright ✅ graphQL API testing by playwright ✅ Jmeter 𝑫𝒆𝒗𝒊𝒄𝒆 𝑨𝒗𝒂𝒊𝒍𝒂𝒃𝒊𝒍𝒊𝒕𝒚: 📱 iPhone 14, iPhone X, iPhone 11, iPhone 13 📱 Samsung A9, A6, S20 FE 🖥 Windows 11 - 16'' 🖥 Windows 11 - 14'' 🖥 Windows 11 - 10'' 🖥 Windows 10 🖥 Macbook Air - 13'' 💰 Paid subscription of BrowserStack with 3000+ real devices and browsers 𝑻𝒐𝒐𝒍𝒔: 🛠 Project management/bug tracking tool: Jira, Clickup, Trello, Red mine, Unfuddle, you track, Bugzilla, Mantis, test lodge, TFS etc 🛠 Test case management tool: Test lodge, Test rail, xray, qase, TFS etc 🛠 Accessibility Testing: Chrome Vox Screen reader, Light house, NVDA Screen reader 🛠 Team communication: Slack, skype, hipchat, Teams 🛠 Testing support tool: jing, gyazo, pic pick, MS-Office, snag it, dev tool bar 🛠 Wire frame: blasmiq, axure 🛠 Survey: qualtrics, survey monkey 🛠 Cross platforms connectivity: Browser stack 🛠 Simulators: Android studio, xcode 𝑳𝒂𝒔𝒕 𝑼𝒑𝒅𝒂𝒕𝒆𝒅: 02-Nov-2023
    vsuc_fltilesrefresh_TrophyIcon JUnit
    Cucumber
    SurveyMonkey
    Qualtrics
    GUI Testing
    QA Management
    Software Testing
    Black Box Testing
    Selenium
    Postman
    Web Testing
    User Acceptance Testing
    Functional Testing
    Usability Testing
    Regression Testing
  • $30 hourly

    • 4.8/5
    • (26 jobs)
    Key Skills: • Total 18 Years of experience in Software Development using Java J2EE(Spring, Spring Boot, Spring Security, Spring Cloud, Micronaut, Hibernate, JPA, Struts, EJB, JMS, JSF, GWT, ActiveMQ, Apache CAMEL, Apache Kafka, Apache Pulsar, Microservices ) • J2EE(Spring, Spring Boot, Spring Security,Spring Cloud, Micronaut, Hibernate, JPA, Struts, EJB, JMS, JSF, GWT, ActiveMQ, Apache CAMEL,Apache Kafka, Apache Pulsar, Microservices ) • Serverless frameworks (Azure Functions, Durable Functions, AWS Lambda, IBM Openwhisk) • Extensive working knowlegde of Cloud Infrastructure and Marketplace applications(Azure -Function Apps, Durable Fucntions, APIM, Azure Service Bus, Key Vault, AWS - Lambda Functions, AWS API Gateway, S3, AWS SQS, IBM Cloud). • Distributed Edge Computing and have good experience in working with systems of high scale. • Worked on Auth0, Okta and integrating many systems using Auth0 • Worked on Siddi and Complex Event Processing (CEP Systems) • Containers (Docker, Kubernetes, Azure AKS) • Extensively worked on Performance Testing using various tools like Apache Pulsar Perf, Jmeter, YCSB and getting Benchmark numbers. • Search Engine (Solr, Lucene, Elastic Search) • Expertise in development of Plug-ins, Widgets, Jive Apps, Web Services, Themes on Jive Platform and well versed with Jive SBS 4.5, 5.0, 6.0, 7.0, 8.0, jive-n, jive-x platforms • Expertise in using build tools like Maven, Ant, Jenkins, Cruise Control and setting up CI/CD pipelines • Expertise in writing/consuming Web Services (REST and SOAP) • ETL Tools (Talend Open Studio and ETL Works). Good working knowledge of Talend Open Studio and cloud based ETLWorks and writing and integrating jobs with other systems like Salesforce, Mulesoft, Sharepoint, MercuryGate, Ring Central, Twilio, SendinBlue, DAT, BlueYonder, 123Loadboard, DAT etc and other Enterprise Web applications. • Expertise in deploying web applications on Windows/Linux/Unix servers • Good Hands on experience in managing and configure Servers like Tomcat,Apache, SUN ONE AS – 8.1, WEBLOGIC 8.1, Glassfish v3 and 4 • Certified as SCJP(Sun Certified Java Professional) • Certified as SCWCD(Sun Certified Web Component Developer) Professional • Certified MongoDB developer from MongoDB University Over the last few years I have worked with global clients like Albertsons, UST-Global, British American Tobacco(BAT), Grail Research, Sony, Hitachi, Morgan Stanley, Bank of New York and have gained considerable experience in architecting and developing highly scalable Enteprise web and data solutions.
    vsuc_fltilesrefresh_TrophyIcon JUnit
    SonarQube
    J2EE
    ETL Pipeline
    Performance Testing
    Microsoft Azure
    Web Service
    JSON
    Java
    API Integration
    Spring Boot
    Azure DevOps
    Docker
    Microservice
    Spring Batch
  • $40 hourly

    • 5.0/5
    • (37 jobs)
    Back-end engineer with a lifelong passion for software, databases, and scalable distributed solutions. Over the 12+ years, I have developed or contributed to nearly 50+ projects in a variety of work like developing from stretch and scaled up to 1M+ user base, scaled from 1000 req/day to 1M req/day, and other technical works. I have worked with clients in various domains like healthcare, fintech, ed-tech, real estate, government agencies, and the non-profit sector, and have worked for companies such as Upwork (yes I worked for Upwork itself, a listed company on the NASDAQ exchange), LetsheGo (a listed company in Botswana Stock Exchange), OCO global, and many more startup companies in the world. Do you like Upwork's Reports & Time tracking feature? I am one of those developers who built that :) ✅ How can I help you ✓ I can handle your all end-to-end requirements analysis, UX, development, testing & delivery so you can focus on your sales & operations ✓ I can extend/develop your MPV product to production-ready ✓ I can develop products from scratch until the final delivery and support with maintained code quality and proper code coverage ✓ I can maintain your currently live products in the most optimum way by keeping quality and customer experience at first place in mind and with the minimum team and can save your cost ✓ I can choose the right technology stack and tools for your solution based on real needs and can save costs ✓ I can manage the team, do code reviews, handle CI/CD and releases, support live systems ✓ I can understand and implement the most difficult parts of software systems at very large-scale platforms like Upwork, (I am one of the Upwork platform devs) ✅ Expert areas - Java based back-end frameworks like Spring Modules (Spring MVC, Spring Security, Spring AOP, Spring Rest, Spring Data/JPA) & ZK (Zkoss) - ECMS implementation with Alfresco Content Services 4.x, 5.x, 6.x and Alfresco Process Services (Activiti) - RDBMS (MySQL, PostgreSQL, Oracle) - Graph/Document Databases MongoDB and DynamoDB - Web Crawlers with all features - Microservices based architecture implementation with Spring boot, Spring Integration and Apache Camel - AWS experience with RDS, SQS, SNS, SES, S3, and EC2 Instances - AWS API implementation experience - Queue based implementations with ActiveMQ/SQS - Test driven development implementation with unit and integration test cases with Junit/TestNG + Mockito + Spring - Database integration frameworks like JDBC/Hibernate/Sprint Data (ORM) and Spring Mongo - REST based Web Service/API implementation with Spring REST - CI/CD implementation with (Bamboo + Jenkins + Maven + Nexus + GIT(Bitbucket/Gitlab/Github)) - Payment Gateways implementations like Paypal and Stripe with debit/credit card integration - Solr/Lucene/ElasticSearch search engine integration - Jasper Reports (with DynamicJasper as well) - Agile Methodology understanding all terminology - Experience with implementing very complex queries with MySQL db - Java based Servers Tomcat/JBoss - Repositories like Git, SVN, P4V(Perforce) ✅ What my clients says ⭐⭐⭐⭐⭐ "Vishal is best developer I have worked with till date. He is prompt responsive, an incredible problem solver, very professional, highly skilled and great team leader. He handles our portal continuous development including all project phases starting from requirement gathering(calls), task creation with all details, estimation, development, deployment on all environments, testing, creating wiki pages, choose right technology stack and AWS resources and manage tickets! He is handling dev team and also do development himself and supports everyone. Will certainly work with him again when we restart the project development! Highly recommended developer." 👤 Hugo Galicia ( CEO @ chicagodealvault.com ) ⭐⭐⭐⭐⭐ "It was a highly positive experience working with Vishal. He was conscientious, always doing his due diligence to clarify any uncertainties before starting work. He gives accurate estimates of effort/time required for work, and either delivers on time or early. Overall a very reliable and dependable worker. We hope to work together with him soon. Highly recommended!" 👤 Dominik Bieringer ( CEO @ Kandu ) ⭐⭐⭐⭐⭐ "Very experienced and diligent contractor" 👤 Abhijit Dhar ( VP - Technical Services @ Whitehat Virtual Technologies ) ⭐⭐⭐⭐⭐ "Vishal is an excellent java engineer, with great business logic, self-motivated, with deep technical knowledge. He jumped right in and understood the current project architecture with minimum KT and limited documentation. He is always eager to solve new issues. I highly recommend him and will definitely work with him again, if opportunity permits. A pleasure to work with" 👤 Chris Adams ( CEO @ eDataSource )
    vsuc_fltilesrefresh_TrophyIcon JUnit
    SQL
    Web Application
    SaaS
    Integration Testing
    J2EE
    Spring Boot
    Microservice
    Hibernate
    Spring Framework
    PostgreSQL
    Amazon DynamoDB
    Java
    MySQL
  • $25 hourly

    • 5.0/5
    • (17 jobs)
    As a skilled and experienced Spring developer, I have a strong background in Java and the Spring framework. I have a proven track record of designing and building scalable, high-performance web applications using Agile development methodologies. My expertise includes troubleshooting and problem-solving, as well as a quick ability to learn new technologies and programming languages. One of my notable projects is the development of a Clinic Management Application. This application was designed to help clinics manage their patients, appointments, and medical records more efficiently. It included features such as scheduling, patient registration, appointment reminders, and electronic medical records. The application was built using Spring, Hibernate, and a PostgreSQL database. I hold a bachelor's degree in computer science engineering and I am always seeking new opportunities to enhance my skills and expand my knowledge. I am able to work independently or as part of a team, and I am dedicated to delivering high-quality work on time and on budget. I am available for hire on Upwork, and I look forward to the opportunity to work with you and help bring your projects to life.
    vsuc_fltilesrefresh_TrophyIcon JUnit
    CI/CD
    JavaFX
    Oracle PLSQL
    NoSQL Database
    Desktop Application
    Microsoft SQL Server
    MongoDB
    SQL
    Angular
    Spring Batch
    Spring Framework
    Spring Boot
    Spring Security
    PostgreSQL
  • $30 hourly

    • 5.0/5
    • (2 jobs)
    Hello!!! Thanks for stopping by my Upwork profile! If you're looking for a skilled and reliable developer, you've come to the right place. Feel free to explore my profile and see for yourself what I can bring to your project. Let's collaborate and create something great! I am a Java developer with 6 years of experience in designing and developing high-quality software solutions. I specialize in payment gateway integration and have successfully integrated payment gateways for multiple clients. I have extensive knowledge of Java, Spring Framework, and Hibernate, and have worked with various payment gateway providers such as PayPal, Stripe, and Apple Pay. I am a detail-oriented, result-driven, and reliable developer who is passionate about delivering high-quality code. I have experience in below technologies. ------------------------------------------------ 1. Languages: Java (8,11), Kotlin, C#, .NET 2. Framework : Spring, Spring Boot, Spring Core, Spring MVC, Spring Security, Spring Data, Microservices 3. DevOps: Docker, Kubernetes, Jenkins 4. VCS: Git, BitBucket, CVS 5. RDBMS: Oracle, MySQL H2, Maria, PostgreSQL; 6. NoSQL: MongoDB, Cassandra 7. Unit testing: Junit, Mockito 8. Domain Knowledge: Financial (Fin Tech), Payment, HRMS, Healthcare 9. Web Service: Rest, Soap, Json, Xml Extra Skills: -------------- #Payment gateway integration #Maven, Gradle #Agile Methodologies (Scrum, Kanban) #Test-Driven Development (TDD) #Continuous Integration/Continuous Deployment (CI/CD) Experience: -------------- Successfully integrated payment gateway for an e-commerce client using Java, Spring Framework, and Hibernate, resulting in a seamless payment process for customers. Developed a payment gateway integration for a travel booking platform using Stripe payment gateway, which resulted in a 25% increase in successful transactions and reduced payment processing time by 30%. Implemented Aurus and MasterCard payment gateway integration for a financial services company, which allowed customers to make secure online payments. Used RESTful Web Services and JSON for communication between the payment gateway and the application. Worked on a large-scale enterprise system for a logistics company using Java, Spring Framework, and Hibernate. This project involved payment gateway integration for multiple payment methods, and I successfully completed it within the given timeframe and budget.
    vsuc_fltilesrefresh_TrophyIcon JUnit
    Web Service
    PHP
    Oracle
    Hibernate
    Spring MVC
    Microservice
    HTML
    JSON
    RESTful API
    Java Servlet API
    Spring Boot
    JavaFX
    Java
    JavaScript
  • $20 hourly

    • 5.0/5
    • (61 jobs)
    🏅 Top Rated Freelancer Hello !!! I’m a Software Engineer specialised in Backend Development with over 6+ years of working experience mostly working on Spring Framework. Hands-on design, development, implementation, and optimisation of the application. Use Object-oriented techniques and Software engineering best practices including Design review, Code review, and Code re-factoring. Experienced with the full Software development life cycle (SDLC) including - Requirement gathering - Prototyping (Design, Development & Debugging) - Testing and - Deployment Good experience in Agile software development methodologies (Scrum, Sprint plan, Timeline, etc.). The strong idea about the deployment process and tools like Maven, Jenkins. 🌟 My Specialization 🌟 ✅ Java (8, 11 & 17): JavaSE, JavaFx, JDBC, Swing, Java Beans, Java Mail. ✅ Java Ee Family: EJB, JPA, Hibernate, CDI, Servlets, RESTful Services (JAX-RS), SOAP Services (JAX-WS), Apache CXF & Bean Validation. ✅ Java Ee Web: JSF, JSP, Thymeleaf, Bootsfaces & Primesfaces. ✅ Spring Family: Spring MVC, Spring Boot (Data, Rest, Vault, Security & Cloud [Microservices etc.]). ✅ SQL: MySQL, PostgreSQL, MariaDB & Oracle ✅ NoSQL: MongoDB & Redis ✅ AWS: IAM, EC2, S3, RDS, Lambda, Elastic Beanstalk etc. ✅ Oracle Cloud Infrastructure (OCI): Compute Service & Autonomous JSON Database ✅ Message Queues: ActiveMQ & RabbitMQ. ✅ Networking: WebSocket (Stomp & SockJs), Socket & RMI. ✅ Testing: JUnit, Spring Test, Mockito, Integration Test, Unit Test. ✅ Versioning: Git, Github, BitBucket & VisualSVN. ✅ DevOps: Docker, Docker Compose & Jenkins. ✅ Web: HTML, CSS, SASS, Javascript, React Js, Bootstrap & Material UI. 🌟 WHY CHOOSE ME OVER OTHER FREELANCERS? 🌟 ✅ Client Reviews: I focus on providing VALUE to all of my Clients and Earning their TRUST. The Client Reviews and Feedback on my Profile are critical to me. ✅ Over-Delivering: My focus is on PROVIDING more than what I expect to RECEIVE. I take pride in leaving all of my Clients saying "Great Work." ✅ Responsiveness: Being responsive and keeping all lines of communication readily open with my Clients.
    vsuc_fltilesrefresh_TrophyIcon JUnit
    API Development
    JavaFX
    Technology Tutoring
    Jakarta EE
    Java
    MySQL
    Java Persistence API
    MongoDB
    RESTful API
    React
    Spring Boot
    PrimeFaces
    PostgreSQL
    Docker
  • $75 hourly

    • 5.0/5
    • (2 jobs)
    Architected, maintained, and extended automation infrastructure by utilizing Selenium Webdriver. Designed, wrote, and executed system-wide test plans and test case suites for automation test frame components. Interpreted and converted manual test cases into automation smoke and regression suites. Performed backend testing of application using PostgreSQL, writing queries to confirm the correctness of data entered via UI and data manipulation. Led and mentored junior automation and manual QA engineers to execute and analyze automation smoke and regression tests.
    vsuc_fltilesrefresh_TrophyIcon JUnit
    API
    PostgreSQL Programming
    Electronic Data Interchange
    Test-Driven Development
    Selenium
    Automation
    Web Service
    TestNG
    Test Management
    Selenium WebDriver
    Java
    Python
  • $20 hourly

    • 5.0/5
    • (16 jobs)
    I am a mobile app engineer with over five years of dedicated expertise in Android and Flutter. My journey in the field has been marked by a passion for crafting innovative and user-centric applications that seamlessly blend functionality with aesthetic appeal. Whether working independently or as part of a collaborative team, I am committed to delivering high-quality, scalable, and maintainable product. My ability to communicate effectively with stakeholders, understand project requirements, and translate them into robust, feature-rich applications has been a cornerstone of my success. ⭐️Tech Stacks ⭐️ Android(Kotlin/Java) Flutter(Dart) Firebase Azure DevOps DataDog FlutterFlow Sentry GraphQL Websocket MLKit OpenAI AWS Stripe 🔦Testing Junit Espresso Dart Testing
    vsuc_fltilesrefresh_TrophyIcon JUnit
    Azure DevOps
    Mobile App Development
    Payment Functionality
    Node.js
    Startup Company
    MongoDB
    API
    Android
    Firebase
    Dart
    Git
    Kotlin
    Java
    Flutter
    Android App Development
  • $10 hourly

    • 4.7/5
    • (8 jobs)
    I am a senior Java developer having more than 4 years of professional experience in software development. A self-starter, and a proven team player, and always accepted the challenges that allow me to learn new skills while utilizing my hard-earned skills - Experienced in various areas in the design, development, and maintenance of software applications - Well-versed in developing applications based on SOA (SOAP/Rest). - Have experience in creating applications from scratch. - Have good knowledge in Java7/8/11/17, MySQL, Oracle ,Spring Frameworks(Boot, Security, Data JPA, Spring Web, etc.) and docker. - In addition to working independently on projects, I am well able to create value with a team. - Experienced in writing test automation and load test scripts. - Good problem-solving skills My specialization: ✅ Java, JavaEE, Java Web ✅ Spring Boot, Spring MVC, Spring Security, Spring integration, Spring MicroServices ✅ ORM, Spring Data/JPA/Hibernate/ JDBC, Spring sessions ✅ Databases: MySQL, Postgres Oracle Pl/SQL, MongoDB, Mongoose ✅ REST APIs integration, design, and development ✅ Soap Apis ✅ Linux, Dockerizatoin ✅ Rabbit Mq, KAFKA, and its integrations ✅ Front end development: Html, CSS, JavaScript, thyme leaf 𝙈𝙮 𝘾𝙤𝙧𝙚 𝙅𝙖𝙫𝙖/𝙎𝙥𝙧𝙞𝙣𝙜 𝘽𝙤𝙤𝙩 𝙀𝙭𝙥𝙚𝙧𝙩𝙞𝙨𝙚: 💥 𝐅𝐫𝐚𝐦𝐞𝐰𝐨𝐫𝐤𝐬: Spring boot, Hibernate, Web Services, JPA, JMX Client, Spring MVC, Spring Rest, Spring data, Spring Gateway, etc 💥 𝐃𝐞𝐯𝐎𝐩𝐬: Docker 💥 𝐃𝐚𝐭𝐚𝐁𝐚𝐬𝐞: SQL Server 2008, MySQL, Oracle, Postgresql, Mongo Db 💥 𝐎𝐭𝐡𝐞𝐫 𝐓𝐨𝐨𝐥𝐬 & 𝐓𝐞𝐜𝐡𝐧𝐨𝐥𝐨𝐠𝐢𝐞𝐬: SVN, GIT, PostMan, JMeter 💥 𝐒𝐞𝐜𝐮𝐫𝐢𝐭𝐲 𝐌𝐨𝐝𝐮𝐥𝐞𝐬: Spring Security 💥 𝐓𝐞𝐬𝐭𝐢𝐧𝐠: JUnit, Mockito 💥 Payment Gateways: Master Card 💥 Third-party Integrations: SendGrid API, TextLocal API, WhatsApp Business API
    vsuc_fltilesrefresh_TrophyIcon JUnit
    Thymeleaf
    Spring Framework
    Spring Boot
    MySQL
    RESTful API
    Java
    Spring Security
    RabbitMQ
    Java Persistence API
    Microservice
    Hibernate
    Spring MVC
    Docker
    JavaScript
  • $65 hourly

    • 5.0/5
    • (14 jobs)
    I am an experienced backend Java developer who specialises in building small scalable Micro services. Expert in building scalable Rest apis and processing systems. Strong and un wavering opinion that test driven development is the only way to build robust future proof code. I understand and have built front end webpages, see the portfolio section, but this is not my core area backend development is. I have been Contracting/Freelancing for many years now in different business shapes and sizes. I enjoy what I do and have worked with many companies on small and large pieces of work. My experience ranges from working in an investments bank to a sports startup, media and entertainment and adTech. Ive seen and learnt a lot from every role and apply all these learning to my current work.
    vsuc_fltilesrefresh_TrophyIcon JUnit
    Integration Testing
    HubSpot
    Mockito
    HTTP
    Spring Boot
    Amazon DynamoDB
    Twilio API
    Java Persistence API
    Microservice
    Java
    MySQL
    Web Service
    Spring Framework
  • $25 hourly

    • 4.8/5
    • (33 jobs)
    Hands on with server side solution using Spring, Hibernate, J2EE 7 and LAMP (PHP) stack for the last 15 years. - Proficient with building distributed fault-tolerant, soft-real time, microservices based system using vert.x and dropwizard. - Proficient with RDBMS like MySQL, PostgreSQL; NoSQL like Redis, Riak and JCR repositories like ModeShape. - Proficient with UI and mobile hybrid apps like ExtJS 4/5, GWT 2.7, JQuery UI, JQuery Mobile, ExtJs Touch, Angular, Ionic and Cordova - Hands on with "process" based and "case" based implementation using BPMN 2.0 and CMMN 1.0 using Camunda process engine. - IOT sensor based solutions using Arduino/Raspberry PI/BeagleBone and analytics using Esper Complex Event Processing engine for realtime analytics less > Proficient in Spring 2.x framework and AOP using AspectJ AOP framework. > Proficient in building agent based systems using OSGI specs (Equinox and Knopflerfish containers) > Dealt in indigenous and component-based J2EE based solutions for clients. > Proficient in using OSS tools like Ant, Log4j, Tomcat, Hibernate, MySQL etc. > Hands on different Operating systems including Linux, Solaris and Win2k. > SCRUM and UML certified
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    FHIR
    Database Design
    Business Process Model & Notation
    API Integration
    MySQL
    Microservice
    Node.js
    Java
    Docker
    ArangoDB
    Spring Boot
    PostgreSQL
  • $60 hourly

    • 5.0/5
    • (40 jobs)
    Summary: I'm a highly skilled software developer and team leader with over 15 years of hands-on experience in delivering high-quality and reliable solutions. I have experience working with big enterprise teams, as well as small companies, across a wide range of domains and projects with different levels of autonomy and responsibility. My experience includes both technical aspects of projects and customer-facing roles, including working with business users and third parties. My focus is on delivering value to my clients, and I take pride in my ability to understand their needs and exceed their expectations. Skills: * Expertise in data structures, algorithms, multi-threading, and object-oriented analysis and design * Proficiency in team-oriented practices and Agile methods, including version control systems (such as Git and Mercurial), pull request review practices, issue tracking (such as Redmine and Jira), and CICD tools (such as Jenkins, SonarQube, Docker, Mesos+Marathon, and Kubernetes) * Leadership and project management skills, including business process analysis, requirements gathering, and software architecture design * Experience with accounting, financial, logistic, and production data analysis, as well as custom project management and BI reporting system implementation * Proficiency in Java development, including Spring Boot, Data, and Cloud, SQL and NoSQL databases, REST API and microservices, and CICD using Jenkins and Docker * Expertise in web service development, including integrations with Salesforce and compliance functions automation * Advanced NLP skills, including processing, comparing, and analyzing contracts, text classification, and content analysis using statistical and machine learning approaches * Ability to create unit tests and integration tests using JUnit/TestNG, mocks (Mockito), spring-test, and dbunit As a highly skilled software developer and team leader, I am committed to delivering the best quality of service and results on the market. With a Master's degree in computer science and a Bachelor's degree in corporate finance, I bring a unique blend of technical expertise and business acumen to every project I work on. I look forward to the opportunity to work with you and exceed your expectations.
    vsuc_fltilesrefresh_TrophyIcon JUnit
    Quantitative Finance
    Trading Automation
    Microservice
    Spring Data
    Hibernate
    RESTful API
    Jenkins
    PostgreSQL
    NoSQL Database
    Spring Cloud
    MongoDB
    Docker
    Spring Boot
    SQL
    Java
  • $30 hourly

    • 5.0/5
    • (21 jobs)
    ✍🏻 Are you in search of a highly skilled Software QA Engineer with expertise in Performance testing, Performance engineering, Automation testing, Load testing, and Security testing? Look no further! With over 12 years of experience in the QA industry, I have a proven track record of delivering exceptional software quality solutions to clients. My specialization lies in Performance testing, where I ensure that applications perform optimally, handle high loads, and deliver seamless user experiences. ⭐QA Services ⭐ ✅ Manual/Automation Testing ✅ Functional Testing/Regression/Acceptance Testing ✅ Performance Testing ✅ Security/Penetration Testing ✅ Usability Testing ✅ Mobile App Testing (IOS / Android) ✅ Strong knowledge of HTML, CSS and SQL, Python, and Java programming ✅ User Acceptance Testing ✅ API Testing ✅ Experience in SOAP API / REST API/ GraphQL 🛠️ Tools Expertise : ✅ ️Performance testing: JMeter, LoadRunner, Neoload, Gatling, Blaze Meter and K6 ✅ ️Web Automation : Selenium WebDriver, WebDriver.IO, ✅ Defect Tracking Tool: JIRA, Bugzilla, Test Rail ✅ ️Mobile testing: Appium ✅ Monitoring Tools: Dynatrace, AppDynamics, DxApm, Introscope, and Net Diagnostics ✅ Cloud Server Monitoring: AWS Could watch, Open Shift Container, GCP ✅ Data visualization: Splunk, Kibana ✅ Load Generator : Redline13, Balzemeter, LR ✅ ️API testing: Postman, Swagger, Insomnia, Fiddler ✅ ️Cross-browser testing: Browser Stack, Sauce Labs ✅ ️Version Control: Git, Github, GitLab, Bitbucket, Perforce ✅ ️Databases: MongoDB, SQL, MYSQL, Oracle ✅ ️CI/CD: Jenkins, Azure DevOps, Bamboo ✅ ️Build Management: Ant, Maven, Gradle ✅ ️Frameworks: Cucumber, TestNG, JUnit, Mocha, Jasmine ✅ ️Programming knowledge: Java, HTML, JavaScript, Python ➰ Performance Testing Framework ➰ ✅ ️JMeter + Perfmon+ Jenkins ✅ ️JMeter + Jenkins + Grafana ✅ ️JMeter + InfluxDB ✅ ️JMeter + RedLine13/BlazeMeter ⭐ Domain Knowledge ⭐ 📌 E-commerce and retail 📌 Healthcare and medical devices 📌 Finance and banking 📌 Gaming and entertainment 📌 Education and e-learning
    vsuc_fltilesrefresh_TrophyIcon JUnit
    Software Testing
    QA Software & Testing Tools
    SEO Performance
    Mobile QA
    Stress Testing
    QA Engineering
    API Testing
    Selenium WebDriver
    Security Testing
    Software QA
    Selenium
    QA Testing
    Apache JMeter
    Load Testing
    Performance Testing
  • $18 hourly

    • 5.0/5
    • (86 jobs)
    " Honest, Reliable and Committed Freelancer " I’m a passionate Software Quality Assurance Professional, Virtual Assitant, an Entrepreneur, a Wife, a Mother & experimental Painter/Sketcher living in Lahore, Pakistan *** SKILLS *** - Clear Communication, Notes, Use Cases , Pictures with issue info, video of issue, reporting - Designer Tools Knowledge & usage Adobe XD/Invasion/Sketch/Photoshop/Illustrator/ - Detail-obsessed; Pixel perfect as per designs. - Full-time freelancer so ready for regular contact
 - Knowledge of SQL, API Testing - MS Office - Google Docs Expert - Redmine, Jira, monday.com, Trello, Basecamp, Asana, TeamGantt, Git Expert - 110% satisfaction guaranteed, revisions policy. Payment can be divided into milestones, each to be released only after full approval. - All rights are 100% yours, and all versions are sent to you. Thank you for visiting my profile. I look forward to adding value. Best Regards, Sobia
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    Business with 10-99 Employees
    Project Management
    Annotated Screenshot
    User Stories
    Test Case Design
    Test Report
    Light Project Management
    Azure DevOps
    GitHub
    Atlassian JIRA
    Web Testing
    API Testing
    Mobile App Testing
    Functional Testing
    Software QA
  • $12 hourly

    • 5.0/5
    • (22 jobs)
    ⭐️ With over 5 years of commercial experience in QA Engineering, I am highly skilled in testing for web, mobile, and desktop platforms. My professional skills include: 🔹Web and desktop testing expertise (on both Windows and Mac platforms) 🔹Mobile testing proficiency for both iOS and Android 🔹Excellent ability in creating various test documentation, including test cases, bug reports, checklists, test scenarios, and test plans 🔹Proficiency in functional, non-functional, and regression testing 🔹Strong understanding of SDLC, STLC, test types, test levels, bugs life cycle, and testing principles 🔹Experience using project management systems such as Jira, Asana, Trello, Monday, Test Rail, and GitLab 🔹Utilization of various testing tools, including Chrome development tools, Postman, JMeter, Bugfender, and Firebase 🔹Basic knowledge of API testing, HTTP methods, and network protocols 🔹Understanding of various test design techniques 🔹Familiarity with Scrum and Kanban methodologies 🔹Good knowledge and practice with HTML, CSS, Javascript, Bootstrap, Git, and SQL 🔹Understanding of OOP and node packages.
    vsuc_fltilesrefresh_TrophyIcon JUnit
    Automated Testing
    Automation Framework
    QA Engineering
    Functional Testing
    Manual Testing
    Bug Reports
    Web Testing
    Bug Tracking & Reports
    Software QA
    User Stories
    Test Management
    Sanity Testing
    Regression Testing
    Quality Assurance
  • $50 hourly

    • 4.9/5
    • (22 jobs)
    Welcome to Jappware, where innovation meets execution! As the founder and CEO, I lead a passionate team of tech enthusiasts on a mission to turn your dreams into digital reality. We don't just write code; we craft solutions that drive tangible results. With 8 years of industry experience, we've honed our skills to provide a comprehensive suite of software services tailored to your unique needs. 🚀 Our Services 🚀 🔹 Custom Software Development: Transforming your ideas into user-friendly, high-performance software solutions. 🔹 Web and Mobile App Development: Creating responsive and engaging digital experiences for your target audience. 🔹 UI/UX Design: Designing visually stunning interfaces that captivate and convert users. 🔹 E-commerce Solutions: Boosting your online presence and revenue with robust e-commerce platforms. 🔹 Quality Assurance: Ensuring your software works flawlessly through rigorous testing. 🔹 Consultation and Strategy: Guiding you through tech decisions to maximize business value. What sets us apart? ✨ Client-Centric Approach: Your success is our top priority. We listen, collaborate, and adapt to your evolving needs. ✨ Cutting-Edge Technology: We stay ahead of the curve, embracing the latest tools and trends to deliver future-proof solutions. ✨ Proven Track Record: Our portfolio boasts successful projects across various industries and scales. ✨ Transparent Communication: You'll always be in the loop, with clear, open lines of communication.
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    Google Web Toolkit
    Big Data
    Amazon Web Services
    Front-End Development
    EJB
    Data Migration
    Architectural Design
    React
    CI/CD
    Spring Framework
    Distributed Computing
    Java
    JavaScript
  • $20 hourly

    • 4.6/5
    • (37 jobs)
    🌟🌟🌟🌟🌟 Zahid's expertise in Flutter is remarkable. We were thoroughly impressed with the quality of his code, his punctuality, his communication skills, and his ability to seamlessly integrate with our team. We're eagerly looking forward to our next collaboration." - Dennis Harrison, Harrison, LLC 🚀 With over 6.5 years of experience in mobile application development, my mission is to turn your app vision into a reality. I specialize in Flutter and React Native and bring a wealth of skills to the table. About Me: I'm deeply passionate about mobile app development. My dedication to this field drives me to continually learn and grow. When you choose to work with me, you can count on reliable communication, timely delivery of high-quality work, and a collaborative approach. I believe that together, we can bring your app idea to life and make it a success. Skills: ✓ Cross-platform mobile applications using Flutter & Dart and React Native ✓ Responsive and user-friendly UI with Material Design & widgets ✓ State management: Getx, Provider, Bloc, and Redux ✓ Networking, RESTful APIs, Databases, and third-party libraries ✓ Firebase, Google Maps, Google API and others ✓ Testing, debugging & Deploying to Google Play and Apple App Store ✓ Troubleshooting, Maintenance, and bug fixing ⭐ Ready to turn your app idea into reality? Let's embark on this exciting journey together!
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    GPT API
    OpenAI Embeddings
    FinTech
    Blockchain
    NFC
    Chat & Messaging Software
    Hybrid App Development
    iOS Development
    Dart
    Mobile App Development
    Android
    In-App Purchases
    Firebase
    WebRTC
    Flutter
  • $15 hourly

    • 5.0/5
    • (3 jobs)
    Experienced Software Quality Test Engineer with expertise in Automation and Manual Testing in Web/Mobile.Skilled in Java, API testing with RestAssured. Experienced using Testing tools like Cucumber, Selenium WebDriver, Cypress, Restful Web-services. I love doing challenging jobs and I am passionate about learning new technologies to meet the job demands that come my way. In addition to this, I have deep knowledge of OOP concepts.
    vsuc_fltilesrefresh_TrophyIcon JUnit
    Test Automation Framework
    TestNG
    QA Testing
    Testrail
    Selenium WebDriver
    Mobile QA
    Cypress
    Git
    Cucumber
    Java
    SQL
    API Testing
    Jira
    Postman
  • $75 hourly

    • 4.9/5
    • (74 jobs)
    **EXPERT VETTED BY UPWORK and among Top 1% talent on Upwork** I am a Full-Time Freelance IT consultant with 11+ years of rich and varied experience in providing solutions to various clients in various domains in the form of – • Full stack web application development • Enterprise applications development • Backend web services development • Desktop application development • Cloud infrastructure development I have extensive experience of developing applications in - Java, J2EE, Spring, JPA, Hibernate, Angular, Typescript and React Framework. BACKEND DEVELOPMENT - I have worked upon and developed backed of at least 100 different applications to date, which involves extensive experience working with Event Driven Architecture, Micro services architecture and Backend Web Services development. I also have strong hands-on experience and rely heavily upon TDD and BDD approach of Software development DESKTOP APPLICATION PROGRAMMING - I have strong knowledge and experience of working with and developing Desktop applications using Java Swing and JavaFX. I have experience in developing applications for Mac, Windows as well as Linux. FRONT-END DEVELOPMENT - At the front-end, my expertise lies in working with – • JSP • JSF • Vaadin • Angular • React • Typescript • JavaScript • HTML5 • CSS • Ajax • Bootstrap CLOUD INFRASTRUCTURE DEVELOPMENT - • 9x AWS Certified and "Microsoft Certified" Azure Solutions Architect Expert. • Extensive experience with using Docker, Kubernetes, Terraform. • Dockerisation and Orchestration, automating CI/CD Pipelines, VPN Setup, Monitoring and Logging, Cloud Cost Optimisation are my Forte • Active user of AWS and Azure and excellent in picking cost-effective and secure solutions using these platforms. OTHER PROFICIENCIES - • Skilled in SQL as well as NoSQL programming. - Relational Databases - Postgres, MySQL, SQL Server, Oracle and DB2. - Non-Relational databases - MongoDB, DynamoDB • Skilled with ElasticSearch and Redis SOFT SKILLS – • Individualistic personality – who likes to find solutions. • Strong work ethic - my past work can vouch for this. • Positive attitude- comes in handy, while solving complex problems. • Excellent command over English language. • Excellent Communication skills. • Believes in Team work and joint efforts - can mingle into your current team easily. • Leadership skills - can lead and take up responsibility, even in difficult situations. • Highly dedicated personality - I don’t get bogged down by hiccups, and work to sail my way through them. As I am working in a highly dynamic field, so I keep updating myself with latest trends and developments in the field of software development. Thus ensuring, HIGH VALUE WORK for my clients. My technical capabilities, hardworking nature and past record of providing value to my clients can be vouched by client reviews on my profile. Cheers!
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    RabbitMQ
    CI/CD
    Cloud Computing
    SQL Programming
    J2EE
    DevOps
    Solution Architecture
    Microsoft Azure
    Microservice
    Java Persistence API
    Jakarta Server Faces
    Amazon Web Services
    Spring Framework
    Java
    RESTful API
  • $54 hourly

    • 5.0/5
    • (20 jobs)
    Leveraging a potent mix of JAVA 20, JAVA 17 LTS, JAVA 8+, JAVA legacy, Spring Boot, Spring Security, JPA, Spring WebFlux, Rest, Javascript, and React, I am skilled in full-stack software development. My proficiency extends to caching and messaging systems such as Redis, Hazelcast, Kafka, and Spring Integration. Operating within containerized and orchestrated environments, I am adept with Docker, Kubernetes, and the Kong gateway. Additionally, my proficiency encompasses a broad array of databases including MySQL, Postgres, Oracle, and SQL Server. My experience stretches across reworking applications in both Monolithic and Microservices architecture, providing me with a comprehensive understanding of various development strategies. I have a successful track record in designing, developing, and implementing web-based software applications, grounded in a thorough comprehension of industry technical standards and based on meticulously analyzed requirements. In my quest for code optimization and performance enhancement, I actively engage in code reviews and debugging. My expertise also covers AWS, Jenkins, and Gitlab pipelines, equipping me to navigate and utilize diverse tech stacks and tools seamlessly. Operating in Agile environments, I have honed my collaborative skills to deliver projects within stringent deadlines. My experience in team-based settings has enriched my communication and teamwork capabilities, ensuring I consistently contribute to achieving team objectives.
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    JavaScript
    React
    SQL
    Linux
    Spring Boot
    Java
    Web Development
    Web Application
  • $10 hourly

    • 5.0/5
    • (7 jobs)
    🥇I'm QA Lead experience with Implementing QA Processes, New tools, leading projects independently and executing test cases along with documenting test results and verify test execution results/updating execution information. Well acquainted with the Software Development Life Cycle (SDLC), Software Test Life Cycle (STLC), Bug Life Cycle & strong working experience in Agile Software testing methodologies. I am well good at translating business requirements, processes into clear and comprehensive Test Plan, Test Scenarios, and Test Cases. Scope of Testing; ✓ Manual Testing (Functional Testing Such as Smoke and Sanity Testing, Regression, Usability, Alpha-Beta, Positive and Negative, Unit, GUI, Exploratory, API and end to end) ✓ Mobile Apps Testing ✓ System Setup and configuration ✓ Cross-browser Testing ✓ Database data validation ✓ UI/UX Testing/Feature suggestion ✓ Test financial and other detailed reports Solutions; ✔ Developing functional, unit, system-integration and regression automation test (Selenium/Webdriver - Python, Java), BDD, DDT, Cucumber ✔ Creating automation tests with Katalon Studio (UI, API) ✔ Writing API automation tests with Rest Assured ✔ Creating API RESTful tests (Postman, Newman) ✔ Creating Web scraping scripts: Java, Python (BeautifulSoup) ✔ CI/CD experience (Jenkins, CircleCI, Docker) 🚩I strongly believe that software should be user-friendly and flawless. Let's achieve it together 🚩
    vsuc_fltilesrefresh_TrophyIcon JUnit
    Software QA
    QA Engineering
    Unit Testing
    Selenium WebDriver
    Automated Testing
    A/B Testing
    Test Case Design
    Functional Testing
    Manual Testing
  • $30 hourly

    • 4.5/5
    • (78 jobs)
    I am a 7+ year developer. Flutter, Android, iOS. If you are looking for a person who can do more than just "write a code" but also make it professionally with a conception of all peculiarities - you are in the right place. Also, I am good at refactoring + supporting legacy code. I always follow the Android User Interface Guidelines, so you can be sure that my code will exactly match Google recommendations and requirements. I have an opportunity to work in any kind of team - from just me and the customer to a large distributed team. It’s important for me to build long-term relationships with clients
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    Dart
    iOS
    Android App Development
    Swift
    Mockup
    Flutter
    Website Development
    REST
    Data Structure
    Firebase
    Google Maps API
    Java
    Mobile App Development
    iOS Development
    Android
  • $30 hourly

    • 5.0/5
    • (36 jobs)
    Hi!!! It's me. An enthusiast with 7 years experience as a Senior Software Engineer, especially in Golang Development and Java/Spring Framework Development. I graduated with a Bachelor degree in Computer Science April 2018. I have worked for many projects in many fields like: warehouse outsourcing, data processing, product development. Having worked for a big company in Vietnam, I have strong experience with developing highly scalable, performance and modern Microservices based platforms and mobile/web APIs. Main services that I offer now on Upwork include: Golang Backend Development, Java/Spring Framework Backend Development, AWS consultant, Elasticsearch, MongoDB. #1. Golang Backend Development - 3 years of experience in backend development using Golang framework: GIN / Gorm. - Understanding of REST / gRPC API and one of the databases such as PostgreSQL, MySQL, Redis.IO, Elasticsearch… - Very good at unit testing. - Experience with Microservices. - Good document writing and clean-coding skills. - Good soft skills such as communication and problem solving. - Understanding of system design and tuning for high performance, scalability and reliability. - Experience with Microservice architect. - Experience with Devops, Linux, Ubuntu. #2. Java/Spring Backend Development: - Experienced in Java/J2EE, Spring MVC framework, MySQL and MongoDB. - Understanding of system design and tuning for high performance, scalability and reliability. - Experience with Microservice architect. - Experience with Devops, Linux, Ubuntu. #3. AWS - Hands-on AWS Technical Architect with 3 years in developing and architecting enterprise large scale multi-tier solutions that require complex Architectural decisions. - Hands-on experience on implementing Cloud Solutions using various AWS services including: EC2, VPC, EKS, S3, Lambda, RDS, Aurora, Code Pipeline, Code Build, Code Deploy. - Worked on infrastructure with Docker containerization. Expertise in Docker containerized environment, hosting web server on containers, building Docker images using Dockerfile. #5. Elasticsearch Expert - Installing and configuring Elasticsearch for production. Making Elasticsearch ready for scale and security. - Design and recommend a full text search system or centralized Logging Analysis system using Elasticsearch. Recommend which query can apply to specific use cases. - Tuning search queries for best performance and making the search results matching with user expectation. Tuning the indexing process for high performance and persistence. - Recommend the use case for suggestions. #6. MongoDB Developer and DBA - Excellent experience on MongoDB Administration. Good understanding of DB schema design, performance tuning and capacity planning. - Operational experience with MongoDB Data Modeling. Understand and Optimize query performance. Excellent understanding of MongoDB CRUD operations - Configure and monitor MongoDB instances. Configuring MongoDB replica set with members and arbiters. - Comfortable in using MongoDB tools like, mongostat, mongotop, mongoexport, mongoimport, mongodump, mongorestore etc. - Database Security management and User Management.
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    Golang
    Microservice
    Java
    MongoDB
    Elasticsearch
    Linux
  • $30 hourly

    • 5.0/5
    • (17 jobs)
    I am a Senior Full Stack Web Developer and Solution Architect. I am having good knowledge of front-end, back-end techniques and Mobile App Development projects, have more than 10 years of experience in developing Websites, Web & Mobile Applications. Hand on Experience :- 👉 Languages: Java, Java Script, Type script, HTML/HTML5, JQuery, CSS/CSS3 👉 Frameworks: Spring Framework, Node.js, Angular. js, ReactJs 👉 Mobile Application Frameworks: Flutter, React Native 👉 Front End Frameworks: ReactJs and Next.js, VueJs, AngularJs, BackboneJs 👉 Development Tools: Ruby Mine, Sublime Text, Atom, Net bean IDE 👉 Database: MySql, PostgreSQL, SqLite3, MongoDb, DynamoDb, GraphQL 👉 Caches and KV Stores: Redis, Mem-cache 👉 Platforms: Microsoft Windows, Linux, and Macintosh 👉 Tools: Microsoft Visual Studio, Eclipse IDE, Net bean IDE, Sublime, Atom 👉 Search Engine: ElasticSearch 👉 Web Frameworks : Ruby on Rails, Express(NodeJs), Laravel(PHP) 👉 Testing Frameworks: Rspec(Rails), Puppeteer and Selenium(Automation), Jest and enzyme(Unit testing), Jbuilder(load testing) 👉 Amazon Services: EC2, S3, Beanstalk, DynamoDB, RDS, Lambda 👉 Design: Twitter Bootstrap 2.x.x/3.x.x, tailwind, Css/Css3, MATERIAL UI 👉 Data Interchange Formats: XML, JSON, CSV 👉 API Frameworks Expertise: Ruby on Rails, NodeJs 👉 Version Control: GIT 👉 Cloud/Servers: AWS, Apache, Nginx, 👉 Background Tasks: Sidekiq scheduler, Cron-jobs, 👉 Logging/Monitoring: Papertrail, Airbrake, New Relic Key Words: Object Oriented programming, Internet Programming, Web Programming, Mobile App Development, Software analysis and designing, Scraping I understand the needs and goals of the organization/individual and can find ways to help them realize their objectives more efficiently. I care for your time and mine also. I'm flexible enough to adjust to your requirements ensuring you the quality work. Cheers!
    vsuc_fltilesrefresh_TrophyIcon JUnit
    Tailwind CSS
    Spring Security
    Git
    JasperReports
    Web Application
    Spring Boot
    Microservice
    Apache Kafka
    Spring Framework
    Redis
    Oracle Database
    Android
    Java
    MySQL
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