Hire the best ZK specialists

Check out ZK specialists with the skills you need for your next job.
  • $35 hourly
    Researching, designing, implementing and managing software programs. Testing and evaluating new programs. Identifying areas for modification in existing programs and subsequently developing these modifications. Writing and implementing efficient code.
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    Spring Cloud
    Web Design
    Spring Boot
    Java Servlet API
    Spring Framework
    Vaadin
    Spring MVC
    Jakarta Server Pages
    Java
    CSS
    CSS 3
    HTML5
    HTML
    Spring Data
    Spring Security
  • $35 hourly
    IT Specialist with over 15 years of experience in a variety of organizations . Committed to continuous learning to ensure my skills are up to date, flexible and organized, with ability to work effectively. Excellent contributor as part of a team and proven ability to work on own initiative.
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    Flutter
    Spring Boot
    Linux System Administration
    Jakarta EE
    Vaadin
    PrimeFaces
    Bash
    PostgreSQL Programming
    TypeScript
    Angular
    Ansible
    Android
    Database Architecture
    Java
    PostgreSQL
  • $35 hourly
    I have 9 years of experiance in Java specialized in. Service side: Spring boot,Spring JPA, Spring Cloud, Spring flux, Apache Kafka, Microservices. Frontend: Vaadin, Hilla, React, Javascript, TypeScript, HTML, CSS, Tailwind, SCSS Integration:OpenAI Database: MongoDB, Oracle, MySQL, PostgreSQL Cloud Services: AWS Version Control: Git,SVN
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    Spring Cloud
    Apache Kafka
    Elasticsearch
    MongoDB
    Vaadin
    Java
    Spring Boot
    Microservice
  • $60 hourly
    More than 10 years of professional experience in software development. Certified AWS Solution Architect, Certified JAVA Professional(OCA & OCP) Certified Expert(OCE) in EJB. Professional experience in JAVA/J2EE, JPA, Spring Framework, ZK, JSP/Servlet, Mysql, Oracle, Rest API, Weblogic, JBOSS, Tomcat, Jasper Report etc. 6 years of working experience in Financial And Banking Domain.
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    CSS
    API
    JUnit
    Spring Boot
    Hibernate
    ZK Framework
    JasperReports
    EJB
    Java Persistence API
    Spring Framework
    Java
  • $20 hourly
    I have 15 years of experience in Java/J2EE technologies and I have been involved in analysis, design and coding. Key Skills: Core Java, Multithreading, Strong knowledge of OOPS concepts J2ee Technologies: Spring Boot, Spring Security, JWT, Struts, jQuery, BootStrap, Hibernate, jJPA, EJB, Servlet, JSP,JMS, ActiveMq,JDBC, XML (DOM & SAX Parser) JNDI, XML, AJAX, DHTML, JavaScript, CSS, Web Services AXIS AND JAX-WS, Rest API's, Quartz Scheduler Framework, JPA, Geo API . Database: Oracle, Mysql, DB2, MongoDB Other Tools: Eclipse, JUnit , AGILE, UML, Design Patterns, J2EE Design Patterns Servers Apache HTTP Server 2.0, Web Sphere Application Server 6.0 ,JBoss 5.0, Tomcat 8, GIT, SVN, Maven .
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    J2EE
    Core Java
    Elasticsearch
    Database Architecture
    RESTful API
    Spring Boot
    AJAX
    Hibernate
    Apache Struts
    JavaScript
    HTML
    MongoDB
    MySQL
    JDBC
    Spring Framework
  • $25 hourly
    Over 20 years of experience in planning, developing and implementing various information technology and CRM solutions across Institutions.  Salesforce Certified Administrator. •Over 5 years of implementing customized CRM solutions to various clients like Verizon, Allianz Re-Insurance . •Automated Service, Sales and marketing processes using Salesforce Lightning flows and APEX/Visualforce • Implemented core Salesforce modules like Sales, Service, Financial, Health cloud for small businesses using Agile/Scrum methodologies • Integrated Salesforce with apps like Zoom, RingCentral, Box, Gmail using Zapier • Utilized Webservices/REST API to integrate Salesforce with third party applications. • Implemented Web to Lead, Web to Case and Email to Case channels. • Created OMNI Channel and Web Chat for customer service. • Built reports and dashboards to measure kpis. • Imported data into Salesforce using tools like DataLoader and workbench. • Implemented and created the full life cycle process for large-scale software development • Identified architectural improvements resulting in increased product reliability and responsiveness to new feature requests • Utilizing strong functional knowledge to drive product design • MS (Computer Science) , University of South Carolina, Columbia  Salesforce Certified Administrator  Sun Certified Programmer for Java 2 Platform  Sun Certified Web Component Developer for Java 2 Platform  Sun Certified Business Component Developer for Java 2 Platform  Project management for IT Profession TECHNICAL SKILLS • Java, J2EE, Java Servlets, JSP, JNDI, JFCs, EJB’s, Java Script, AJAX, Web services • Spring Webflow 2.5, STRUTS, Google Web Tool Kit, XML, XSL, ASP, .NET, Shell Scripts, JUnit • WebSphere 8.5, Tomcat, Web Logic 6.0, IIS, Silver Stream App Server, JRun, JWS • RAD 7.5, Eclipse, Visual Studio, JDeveloper, CVS, Clear Case, Stash, UML, Rational Rose • Oracle 11g, D2000, IBM DB2, MYSQL, MS SQL SERVER, MS ACCESS, Toad • Windows XP, IBM AIX and Unix (SUN SOLARIS 5.7), Silver Stream e-portal 2.2 • JIRA, Confluence, Cloud Services (PaaS), SalesForce Administration, APEX, Visualforce
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    IBM Db2
    Apache Struts
    Spring Framework
    XSL
    XML
    Salesforce Lightning
    Core Java
    Jakarta Server Pages
    J2EE
  • $50 hourly
    I am a founder of FlexSolution company with a demonstrated history of working in the software development industry. Certified Alfresco Engineer! Skilled in Liferay, Kafka, Java, Javascript, CAS, LDAP, Maven, Hibernate, Spring Framework, Vaadin, GIT and so on. Graduated from the Kharkiv National University of Radioelectronics.
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    Business Process Model & Notation
    Vaadin
    Hibernate
    Node.js
    NestJS
    React
    Spring Framework
    SQL
    D3.js
    ExpressJS
    Redux
    React Native
    Java
    JavaScript
  • $30 hourly
    I am Software Developer and member of FlexSolution company for the last 5 years. Mostly, I convert PSD designs into HTML/CSS, can implement pixel-perfect layouts, w3c valid code and adaptive layouts for different sizes of screens, devices, browsers and OS. As well I work a lot with Javascript and all popular frameworks such as React/Redux, Angular, etc.
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    React Native
    Android
    WebRTC
    Alfresco Content Services
    iOS
    PSD to HTML
    React
    Node.js
    Vaadin
    Apache FreeMarker
    CSS
    HTML
    Bootstrap
    SaaS
    webpack
  • $70 hourly
    With over 20 years experience in full life-cycle software development which includes analysis/design, coding, testing, implementation, support, and maintenance, I am able to work with you to implement your idea or solve your problem. I'm eager and able to learn new domains, methods, paradigms, and technologies. You'll find me to be a team player with a can do and will do attitude. My latest review speaks for itself, "Paul did an outstanding job ... Superb work, timely, honest, knowledgeable, went above and beyond. Paul is meticulous in his approach. His work included helping specify the requirements, designing the solution, building and testing the software, fixing bugs and helping us deploy the solution. He was primarily focused in the areas of security (Spring), user management, UI development, persistence (hibernate), and exporting our data model to MS Excel. Paul was very fair in the accounting of his time. He was on time with all of his work. I'll likely engage him again without a doubt if/when needed." If you are looking to build a web site and phone apps, you should consider building a Progressive Web Application (PWA) web site which will allow you to develop a single code base that can be "installed" on a smart phone to look like a native app. Skills: * Information Architecture (IA) * Domain Driven Design (DDD) * Object Oriented Design (OOD) * Object-Relational Mapping (ORM) * Object Oriented Programming (OOP) * SaaS development * Test Driven Design (TDD) * Unified Modeling Language (UML) * Unit Testing * User Experience (UX) * User Interface (UI) APIs: * Google Calendar * Google Maps * OpenAI Frameworks: * Vaadin 7, 8, 10, 13, 14, 23 * Spring Boot * Spring Security * JPA * Hibernate - ORM tool * Flowable - BPM tool * Quartz Scheduler * Rulebook * JUnit * mockito * vavr.io - functional programming for Java * Blaze-Persistence * OpenAI-Java Tools: * Intellij IDE * GitHub * Bitbucket * Jira * Confluence * PlantUML - UML diagramming tool * DBeaver - Universal Database Manager
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    Spring Framework
    Java
    CSS
    HTML5
    Java Persistence API
    Object-Relational Mapping
    Object-Oriented Programming
    SQL Programming
    Google APIs
    Payment Gateway
    API Integration
    Vaadin
    Spring Boot
    Web Development
  • $24 hourly
    ✅ 6460+ hours, 30+ contracts with 5 star rating ► Expert Angular developer ► Expert in Spring framework ► 8 + years of experience ► Project Manager experience in Agile development Hello, I am a full stack developer having 8+ years of development and project management experience. Now I am working as CTO of Green Apex Technolabs LLP. We are a team of 90+ skilled engineers. I am a self-motivated, self-organized developer. I believe more in Agile development. I have had Experience in the following area of Opensource ✅ Expert level on Java, Spring, and Vaadin framework ✅ Experience in Grails and Groovy framework ✅ Solid experience with Angular JS, Angular 4/5 ✅ NoSql development experience with MongoDB and DynamoDB ✅ Expert with Amazon Infrastructure and Web service development ✅ Solid written English communication skills # Programming ► Java, J2EE ► Spring MVC, Spring Security, RESTful WebService, Spring Data, Spring social ► SOAP, Hibernate, JPA 2, Maven, JSON, ► Tomcat 7, JBoss ► Third-party tool integration (JavaScript with AJAX, web services and java based.), Vaadin, Grails. ► JavaScript skill with framework like Angular JS ► Expert typescript developer # Testing Tools ► JUnit ► Spock # IDE ► Eclipse, web Strom # Database ► Mysql, ► NoSql like MongoDB, DynamoDB, Couch DB #Other ► Amazon, Heroku, Google cloud ► Web services development ► EC2, S3, RDS, Bean Stalk, Block Storage load balancing etc. Version Control ► SVN, GIT, Bitbucket Moreover, I am an expert Agile scrum master. I have professional communication skills to manage a bigger team and have proven technical knowledge to assure guaranteed success in software development.
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    Heroku
    API Integration
    Web Application
    RESTful Architecture
    Spring Framework
    AngularJS
    Java
    JavaScript
    Hibernate
    Neo4j
    Amazon Web Services
    MongoDB
  • $75 hourly
    ✱ I am senior developer specializing in Back-End and Android Development. I have worked with ⭐High Profile clients⭐ in my Career which I have listed some of them below: ✅ FirstTennessee (Fortune 500) ✅ Amex (Fortune 500) ✅ EDB Norway ✅ ICICI Bank My core expertise and experience are: ✅ Android Application development ✅ Web development using Java 8, Spring Boot framework, JavaScript, HTML 5 ✅ Back end development with Java 8, Spring Boot frame work ✅ REST API development using Spring Boot ✅ Desktop development using Swing and JavaFX ✅ Micro services with Spring Boot ✅ Experience in Graph algorithms ✅ Bitcoin and Block chain development using Bitcoinj frame work ✅ Eclipse RCP development ✅ Open source application modification and development ✓ ChatGPT ✓ Java - 12+ years ✓ Java 8 - 4 years ✓ JavaScript - 5+ years ✓ Spring Boot - 3 + years ✓ Spring Framework - 3 + years ✓ React ✓ GraphQL ✓ AWS ✓ AWS Amplify ✓ Aws AppSync ✓ DynamoDB ✓ Quarkus framework ✓ Micronaut ✓ CI/CD ✓ Android - 2 + years ✓ Spring Security - 2+ years ✓ WebRTC , WebSocket - 2+ years ✓ Python - 1+ year ✓ Node.js - 1 + year ✓ Play Frame work - 1 year ✓ GIS Development - 1 year I would like to go the extra mile to meet customer expectations for every project I am doing with 100% quality. I am looking for long-term association with clients to get complete benefits and am interested in achieving their business objectives and goals.
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    Apache Kafka
    API Development
    Micronaut
    Spring Security
    Spring Boot
    Core Java
    Apache Maven
    Spring Framework
    GraphQL
    Android
    Android App Development
    Python
    Firebase
    Java
    JavaScript
  • $50 hourly
    Full stack, RPA, Machine learning, GPT, LLM training, Prompt engineering Top level engineer in Upwork.
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    Selenium
    React Native
    Kotlin
    Spring Framework
    Test Design
    Microservice
    JavaFX
    Selenium WebDriver
    Apache Kafka
    Spring Cloud
    Python
    Java
    JavaScript
    Kubernetes
  • $15 hourly
    JAVA (8 & 11), Spring Framework using Boot, Quarkus, Spring Microservices, Spring Batch, Hibernate, JPA, JavaScript, Angular, MySQL, REST, JSP, Servlet, Maven, XML, JSON, JUnit, Mockito, Eclipse, Git, Swagger, Docker, Kafka, AWS, RabbitMQ etc.
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    Swagger
    Servlet
    Apache Kafka
    Docker
    Microservice
    JavaScript
    Java Persistence API
    Spring Boot
    Apache Maven
    Spring Framework
    Web Service
    Java
    Angular
    Hibernate
    Spring MVC
  • $29 hourly
    Leveraging technology to efficiently solve real-world problems, improve processes, increase productivity, secure data, generate in-depth analytics and enhance profitability. I have helped clients in developing as well as training Artificial Intelligence and Machine Learning based models. I have successfully re-engineered, debugged, augmented and enhanced existing projects , sometimes even without source code. I've optimized a variety of databases, viz. databases with millions of records in tables, with more than 100 columns in a row, highly cross-linked databases and concurrent live databases. I have adapted/customized/enhanced quite a few open source Java/J2EE based applications for my clients. Strong hands on experience in efficient coding and managing teams/software at micro as well as macro level. Enthusiastic learner who quickly grasps new concepts and technical skills. I have worked in teams having members from different geographies and diverse cultural backgrounds. I have hard core 18+ years experience with Java/J2EE, Spring, Spring Boot, Vaadin, Encryption, Digital Signature, Security, Big Data, Oracle, MySQL and No-SQL Databases, Security on Linux/Unix and Windows. With more than 100 published blogs/articles, I have written a lot on technical subjects like AI, ETL, Analytics and Data migration etc. Contributed and helped startups grow exponentially in a few months and receive millions in funding, via my technical write ups. My writing can highlight * The Value addition your SAAS/Software product offers for its users * Highlight USPs and useful features * Clearly depict best use cases and ROI * Demonstrate how well it can coordinate with other tools, and other constituents of your software stack * Sincere endeavor and foresight that has gone into the making of the product My experience and skills include:- • Extensive hands on experience with many other Oracle suite products like Business Intelligence/Oracle API gateway/Oracle Sales cloud/PL-SQL/SPMS etc. ; I know their environment well. • Created Reports + Analytics + Dashboards in various domains like Finance/Travel & Tourism/ IT Infrastructure Sourcing/Automobiles/E-com/Science etc. • ETL Architect and Developer • Extensive managerial level experience managing all aspects of the software development life cycle and enterprise IT infrastructure. • Architect effective solutions, create work breakdown structures and ensure quality deliverables. • Visualize and present prototypes for future products or proof of concepts, conduct user experience reviews to understand expectations and requirements, and then develop final solutions. • Minimize schedule and technical risk by foreseeing and addressing obstacles pro-actively and aggressively. • Overall software development experience of more than 18 years. Exclusively with international clients, mostly from the US. • Experience in working with clients from different geographies with various needs. My Upwork scores: Java : 4.65/5.0 (Top 10%) DHTML : 4.4/5.0 (Top 20%) JSP : 3.90/5.0 (Top 20%)
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    Business Intelligence
    Java
    Data Science
    MySQL Programming
    Technical Writing
    NoSQL Database
    Database Architecture
    ETL Pipeline
    Data Analytics
    Jakarta Server Pages
    Content Writing
    Oracle PLSQL
    Neo4j
  • $70 hourly
    14 year software development experience, 8 year lead engineer/architect experience. Fluent in spoken and written English. Passion for learning new technologies. Solid knowledge of SDLC and agile software development methodologies. Tech stack: Java, Spring Boot, JPA/Hibernate, SQL, Redis, DynamoDB, MongoDB, AWS, Microservices, Event-driven architecture, Docker
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    RESTful Architecture
    Spring Security
    SQL
    Amazon Web Services
    Spring Boot
    Microservice
    Redis
    Java
    Amazon DynamoDB
    MongoDB
  • $18 hourly
    Java J2EE (Spring framework) working experience on spring framework.A highly salable e- commerce solution. ▪ Database : apache cassandra ▪ spring security used in project also session maintaining and authentication & authorization. ▪ FrontEnd : angular js it gives single page application ▪ working with restfull webservices ▪ Familiarity with JUnit, unit testing and continuous integration best practices Java J2EE spring boot I made my own web Application of REAL ESTATE property dealing with admin panel and UI and backend as java spring boot ▪ Database : SQL using JPA ▪ spring security used in project also session maintaining and authentication & authorization. ▪ FrontEnd : angular 4 with component and OOP approach more like a developer way ▪ working with restfull webservices ▪ Familiarity with JUnit, unit testing and continuous integration best practices Java Fx Designing And Developing applications from scratch, Hands on SQl server configuration as per application need Responsibilities: ▪ Design UI of Application. ▪ Developing application using FXML, SceneBulider , UI-controls and CSS. ▪ Establishing Sql Server for communication with JavaFx . FRONT-END ANGULAR-4+ : a great experience of making angular 4/7+
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    Custom Content Management System
    Angular 2
    Java
    jQuery
    HTML
    Spring Boot
    SQL
    Angular
    MySQL
    Spring Framework
    Git
    JavaScript
    Java Servlet API
    PostgreSQL
  • $30 hourly
    Innovative, passionate, and quick software developer and architect with deep knowledge of programming concepts and internals. 15+ years of hands-on industry experience in programming, designing, managing, & leading software projects & companies. Change agent, problem solver with a passion for technology; skilled in grasping the big picture, conceptualizing, developing & implementing solutions by partnering closely with business leaders. Worked for different type of industries, which includes Health-care Informatics, Lab Informatics, MOOC, Online Education, ERPs, Electronic Design Automation (EDA), Semi Conductor, Heavy mechanical manufacturing, Travel, Pharmaceutical & e-commerce. Skilled in: Python | PHP | Apex | Objective C | Java | C/C++ | Flex | ActionScript | JavaScript | Perl | VB6 iPhone SDK | Android SDK | BlackBerry SDK | Flex SDK | Sancha Django | Django REST | Odoo | Web2Py | Zope | Plone | edX | CodeIgniter | .NET | Java EE SQL Server | MySQL | PostgreSQL | Sybase | DB2 | SQLite | MS Access Odoo | OpenERP | Salesforce CRM | MS SharePoint git | SVN | CVS | VSS | Unfuddle Scrum | UP | UML | CASE Tools | Poseidon | Rambaugh OMT ASP.NET | ASP | Telerik Visual C++| MFC | Win32 | COM | DCOM | OLE | Multithreading ANT | JDK | Digester| Struts | Servlets | JSP | EJB | WebSphere | Eclipse Web 2.0 | AJAX | CSS | XML | XSD OpenSource | github Knowledge Management | MediaWiki | PHP Health-care Informatics | ICD9 | ICD10 | HIPPA | HL7 SEMI Standards | EFEM | SEMI E87 | SEMI E90 | SEMI E40 | Robotics | SECS/GEM | SCADA Customs ERP | Landing Cost | HS Codes | WTO Standards Lab Informatics | Bika | OLiMS | LiMS | LIS Windows | MacOS | Linux | Ubuntu | Unix | EC2 Windows CE | Micro Controller Programming | Dynamic C
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    Ehealth
    Mapbox
    Apache Hadoop
    LIMS
    Android
    iOS
    Odoo
    web2py
    Django
    Laravel
    Python
    PHP
    WordPress
    React
    JavaScript
  • $50 hourly
    I am the Founder & CTO of IOanyT Innovations which is a software development company formed in 2016 and currently employs more than 50 developers. I have over 22 years of experience with organizations like Hewitt, Xerox & Cognizant. Highly accomplished, innovative and results-oriented technology executive with ~22 years of experience in building complex software applications/systems, technology infrastructure and technology businesses to drive revenue growth, expand customer base and increase profitability. Proven track record in implementing technology solutions for a variety of businesses including HRO, Legal, Workforce Management, Call center, Telematics, IoT, Insurance, Transportation, Warehouse and Manufacturing. Built multiple enterprise products with highly scalable architecture and technologies and have successfully executed several projects Globally. My expertise focuses on strategic planning, Innovations, building and extending large software systems and infrastructure, team management, technical architecture, design, product management, program management and project management for high availability, high volume transactional systems, websites and online and mobile applications. Our offerings: - Software Development (Web and Mobile) ----- Java ----- Python ----- NodeJS ----- Angular ----- React - All things AWS and GCP - Security - Advanced Network - Server-less Architecture and development - Cloud migrations - Cloud architecture - Cloud cost optimization - Compliance: HIPAA/SOC2 - IaaS/PaaS/SaaS - Disaster Recovery - Storage solutions - Databases - IoT - AWS IoT Core - Apache Airflow Certifications: - AWS TCO and Cloud Economics - AWS Technical Professional - AWS Business Professional - AWS Certified Solutions Architect - Associate - AWS Certified Solutions Architect – Professional - AWS Certified Advanced Networking - Specialty
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    Machine Learning
    Artificial Intelligence
    Network Security
    React
    Google Cloud Platform
    Web Application
    AWS Glue
    API Development
    Node.js
    Cloud Architecture
    Amazon Web Services
    Internet of Things Solutions Design
    J2EE
    AngularJS
    Python
  • $23 hourly
    💪 7000+ HOURS WORKED | 💰 $200K+ Earned | ✔️ 5★ Review | 👷 30+ Jobs ✔️ Worked with Top 500 companies ✔️My Professionalism = Your Competitive Advantage! ✔️Upwork Top Rated Plus Developer ✔️100% Job Success ✅I specialize extensively in Java: ✓ Back-End Frameworks: Spring Boot, Spring, Hibernate, JPA, JSP, Servlets, Java ✓ Front-End Frameworks: Angular, ReactJS, JQuery, and JavaScript ✓ Other Frameworks: Apache Storm, Hadoop, JPPF, ElasticSearch, Hazelcast, Spring Cloud ✓ Cloud Computing: AWS, Google Cloud, Digital Ocean, and Heroku ✓ Security: OAuth2, OpenID Connect, JWT, LDAP, X.509, Kerberos, Social Logins, SSO ✓ Databases: MS SQL, MySQL, Oracle, PostgreSQL, MongoDB, HBase ✓ CI/CD and monitoring: CI/CD using Gitlab, CI using Jenkins and Bamboo, Kubernetes ✓ Agile Methodology: Scrum and Kanban using project management tools like Jira, Pivotal Tracker, Gitlab, etc. ✅My core competence lies in providing End-to-End Solutions to Enterprise Application Development for the Financial, Healtcare, and Telecom domains. ✅ How can I help you ✓ I can handle your all end-to-end requirements analysis, development & delivery so you can focus on your sales & operations ✓ I can extend/develop your MVP 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 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 ✅ Expert Areas ✓ Java-based back-end frameworks like Spring Modules (Spring MVC, Spring Security, Spring AOP, Spring Rest, Spring Data/JPA) ✓ Microservice & Cloud native architecture for developing SaaS-based system ✓ RDBMS (MySQL, PostgreSQL, Oracle) ✓ Docker, Kubernetes, OpenId, SSO, SAML, ✓ Graph/Document Databases MongoDB and DynamoDB ✓ Microservices-based architecture implementation with Spring boot, Spring Integration, and Apache Camel ✓ AWS experience with Serverless, RDS, SQS, SNS, SES, S3, VPC, Cloudformation, ECS, Lambda, Cognito and EC2 ✓ AWS API implementation experience ✓ Queue-based implementations with RabbitMQ, ActiveMQ, SQS, and SNS ✓ 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 Stripe with Debit/Credit Card Integration ✓ Solr/Lucene/ElasticSearch search engine integration ✓ Agile Methodology ✓ Experience with implementing very complex queries with MySQL DB ✓ Java-based Servers Tomcat/JBoss ✓ Repositories like Git, SVN Have a project to discuss? Let's connect!!
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    Cache Management
    Apache Kafka
    Spring Framework
    JavaScript
    Hibernate
    Redis
    PostgreSQL
    MySQL
    MongoDB
    Node.js
    React
    Angular
    Kotlin
    Java
    Spring Boot
  • $20 hourly
    🏅 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.
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    JavaFX
    Technology Tutoring
    Jakarta EE
    API Development
    Java
    MySQL
    Java Persistence API
    MongoDB
    RESTful API
    React
    Spring Boot
    PrimeFaces
    PostgreSQL
    Docker
    JUnit
  • $60 hourly
    Mostly I am interested in software development of web and mobile applications. Also I have an experience in using Solidity for writing smart contracts. I always aim on long and positive partnership with every client I speak. Web Development: • React.js (Angular, Vue, d3.js, chart.js, web3) • Redux + saga/thunk or mobx, electron/ • Electron wallets • Landings / HTML / CSS / SCSS / Layout • Development of SPA, SSR apps • Development of CRM, admin panels, dashboards, web interfaces • API integration, chat implementation via sockets, Centrifugo implementation • Development of extensions • PWA (Progressive Web App) Mobile Development: • Swift • React Native Backend Development: • Node.js/Express.js/Koa/Socket.io • Golang (Gorilla toolkit / Negroni, Martini, Beego, Gin) • MongoDB; PostgreSQL/MySQL; Redis/CockroachDB; Cassandra/BoltDB • GraphQL; REST; Centrifugo; gRPC; SOAP • JSON; JSON-RPC; XML; proto; RPC • Data parsing Smart contracts: • Solidity • Metamask and Tron integrations • Web3 DevOps: • Caddy; Nginx; Apache • Consul; Fabio; Istio • Kubernetes; Docker; Docker Compose • Sentry • CI/CD (TeamCity, Ansible) • Database clustering • AWS; Google Cloud; Heroku I can work with Figma and different design tools / formats. If there are any needs in creating UI/UX design, let's talk about.
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    Smart Contract
    React
    Blockchain, NFT & Cryptocurrency
    Docker
    API Development
    CI/CD
    Front-End Development
    Cryptocurrency
    Node.js
    Solidity
    React Native
    Swift
    Golang
    JavaScript
    Blockchain Development
  • $45 hourly
    I am a Senior Software Engineer with 7 years of experience in developing WebSites, Web Applications, CRM/ERP, and other custom Software based on clients' requirements. ⭐ Type Developments: Landing page, eCommerce, Business website, SaaS, CRM/ERM, Bots ⭐ Service Types: Сreation, Redesign, Optimization, Integration, Сustomization ⭐ My skills: ✅ Php – laravel 5+, Yii 2, Codeigniter 3-4, Phalcon 3, ✅ JS – Node.js, React.js, Vue.js, JQuery ✅ Python – Django ✅ HTML, CSS – Bootstrap, Vuetify, SASS, Animation ✅ Server - Nginx, Jenkins, Docker ✅ parser development, API ✅ Database – MySQL, PostgreSQL, NoSQL ✅ Microservices – Elastik Search, Redis, Memcached ✅ Architecture – design patterns, SOLID, DRY, KISS, YAGNI I also have extensive experience working with someone else's code, site parsing, integration with third-party services, refactoring, site optimization for SEO queries, writing trading bots or chat bots end etc.
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    HTML5
    Yii
    CSS
    Web Development
    NGINX
    API
    Bootstrap
    Redis
    Laravel
    MySQL
    PHP
    Database
    React
    JavaScript
    Vue.js
  • $65 hourly
    **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 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!
    vsuc_fltilesrefresh_TrophyIcon ZK
    Cloud Computing
    DevOps
    Microsoft Azure
    Amazon Web Services
    CI/CD
    RabbitMQ
    SQL Programming
    Hibernate
    Microservice
    RESTful API
    Spring Security
    Spring Boot
    Spring Framework
    J2EE
    Java
  • $33 hourly
    We are a highly motivated group of software professionals, with a vast experience of working with different types of Web-based, Desktop and Embedded Software Applications. We also have experience of implementation of CMMI. Our core skills are in the domains of Java, .Net, and Databases for Web, Desktop and Mobile Applications. Languages known are Java, C#, php, and cobol.
    vsuc_fltilesrefresh_TrophyIcon ZK
    Vue.js
    Yii
    Angular
    SQL Programming
    API Integration
    ASP.NET
    React Native
    GitHub
    Google Cloud Platform
    Node.js
    React
    Apache HTTP Server
    PHP
    Java
    HTML5
  • $45 hourly
    🏅 Top Rated Plus Freelancer 🕒 1400+ hours on Upwork ✅ 100% Job Success Score I am a results-oriented bilingual with 11+ years of experience professional who is willing to work with clients worldwide. In my case, I am open to working with startup companies, small businesses, and even multi-national firms. I am deeply involved in all my projects from start to finish. I listen to my clients attentively and provide them a vision for what they want, and then I collaborate with them to create and execute a plan of action. I continuously offer my clients the pros and cons of each choice they make and convey my recommendations for their selections. I would like to give quick short profile summary as below Skills ---------------------------------------------------------------------------------------- • 11+ Years of IT Experience relevant to Java with BFSI domain like Banking & Insurance • Core skills SpringBoot, RESTful webservices, Microservices, JPA • Experience in Unit Testing with JUnit5, Mock/Mockito • Good experience with working on front end applications using JavaScript, JQuery and Bootstrap. • Strong experience with Agile or Scrum methodologies. • Good communicator in English • Experience with SQL Databases (e.g. Oracle) • Strong experience with GIT/BitBucket, JIRA, Jenkins, Confluence, Docker. • Good experience working with Tomcat, Jboss, WildFly • Experience working on Cloud technologies (AWS) • Experience using Apache Solr • Good Experience developing unit / integration test cases using Junit /TestNg. • Experience in Integration, Component and End-to-End Testing • Knowledge of Behavior Driven Development (BDD) for automated acceptance tests • Good ability to understand and work with code developed by other developers. • Very comfortable to work independently with minimal supervision Why me? -------------------------------------------------------------------------------------------- -Provide High Quality Services -Delivers Bug Free Code -Good Listener and Great Communication Skill. -Uses Latest technology for Development. Services I provide ---------------------------------------------------------------------------------------- *Software Development *Web application, Development & Maintenance *Creating Template and Reports *Finding Bug and Resolve. *Solve Assignments and Programming Problems. I would be happy if employed by you and will work to the best of my ability.
    vsuc_fltilesrefresh_TrophyIcon ZK
    RESTful Architecture
    RESTful API
    Microservice
    EJB
    Jakarta Server Pages
    Web Service
    Spring Boot
    Spring Framework
    JavaFX
    Swing
    Git
    Java
    JavaScript
    MySQL
  • $15 hourly
    I have 13+ java back end and microservice development experience. Services I offer, Develop any project using java Develop Microservice/Monothalic java backend from scrach Troubleshoot and issue fix in any java backend project Revamping old technology backend in to latest technology (Microservice) Expertise Domain - NFC, Mobile Money / Wallet, BlockChain, Cryptography, Cryptocurrency, IT Security, Stock Market, Document Automation, Banking, Online Reservations Languages/Technologies - J2SE/J2EE, Spring Boot, Spring MVC, DropWizard, Micro Service, EJB 3.0,Hibernate/Struts2, ,Vaadin (GWT base Ajax framework),Java Script, Anguler JS,PHP, HTML,XML, Java Script, Ajax,JSF, Active MQ,RabbitMq, Zookeepr,JMS, REST, SOAP, Grails & Groovy, C, Perl, CSS, TCP Netty framework, Nginx, WebSocket, Jhipster Application Software - Docker, Kubernetes, Amazon products, Axis2,JAX WS, WSAS - WSO2 Web services application server, WSO2 ESB, WSO2 API Manager, Liferay Portal, Ant, Maven, Rational Rose, Easy CASE, BOUML,NetBeans 6.8, Eclipse, STS, IntelliJ IDEA, WSO2 Developer Studio,Macromeadia Dreamweaver Databases / Server - Oracle, MySql Database Server, Postgres Apache Web Server, Sun application server, Apache Tomcat servlet Container, SMStool, JBoss Application Server, Service Wrappers Team Collaboration Tools - SVN, GitLab, BitBucket, CVS, GitHub Operating Systems - Windows 2010, XP,7, GNU/Linux
    vsuc_fltilesrefresh_TrophyIcon ZK
    Apache ActiveMQ
    J2EE
    Spring Cloud
    RabbitMQ
    RESTful API
    HTTP
    MongoDB
    Java
    Kubernetes
    Microservice
    Docker
    Database
    Spring Boot
    XML
  • $45 hourly
    Certified AWS(2x) Java(2x) Python(1x) Excellents soft-skills(team work, international team experience, freelance) Self-taught and responsible person, always trying to keep up with the latest software engineering trends, paradigms and best practices. Strong OOP understanding and design patterns. Jenkins(Scripted, Declarative pipeline, plugins config), CloudFormation, Terraform. Ansible Tower, Docker, Kubernetes(EKS), AWS Services, Bash, Openshift python Scripting Java 8 & 11, Angular 5, .NET C# ,Web services (RESTful,SOAP) LUA, Javascript, SQL,MVC,MVP, JPA(EclipseLink,Hibernate) CSS, XML, JSON, Firebase, AWS( S3,EC2,Lambda), Maven, Postman.
    vsuc_fltilesrefresh_TrophyIcon ZK
    Docker Compose
    Android App Development
    Spring Cloud
    Oracle ATG Web Commerce
    C#
    Ansible
    ASP.NET MVC
    Amazon Web Services
    Jenkins
    Java
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