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Hire the best Core Java Developers in Ukraine

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  • $45 hourly

    • 5.0/5
    • (60 jobs)
    With over 9 years of experience as a Mobile Developer, I bring to each project: ✓ Steadfast Commitment to Quality: Upholding the principle that excellence is the only standard, I approach every project with meticulous care and precision, ensuring outcomes that are not just completed, but masterfully executed. ✓ Passion for New Technologies: My enthusiasm for innovation drives me to continuously explore and integrate the latest trends and advancements in mobile development, keeping my solutions at the forefront of technology. ✓ Holistic Approach: Balancing innovation with reliability, I deliver projects that exceed client expectations, merging cutting-edge technology with dependable performance to create impactful solutions. ✓ Drive for Challenges: The dynamic and ever-evolving landscape of mobile development fuels my pursuit of new challenges and opportunities. Leveraging my extensive skills, I strive to make a significant difference in the mobile technology sphere, pushing boundaries and contributing to projects that set new benchmarks.
    Featured Skill Core Java
    Android UI Design
    RESTful API
    Google Maps API
    JSON
    XML
    Android SDK
    Android App Development
    iOS Development
    Swift
    Kotlin
    iOS
    Android
    Java
    Firebase
  • $7 hourly

    • 4.9/5
    • (22 jobs)
    "Hi! 👋 I'm a backend developer with 3 years of experience specializing in Java ☕ and the Spring Framework 🌱. With a robust understanding of SQL 🗄️, REST 🌐, and various database systems, I’m dedicated to creating high-performance, scalable, and maintainable applications. 🚀 My expertise in testing 🧪 and deployment ensures that my solutions are functional and reliable." Technical Skills: 🟡 Programming Languages: Java 🌱 Spring Framework: Spring Boot, Spring Core, Spring Data Access, Spring Web, Spring MVC, Spring Security 📦 Object-Relational Mapping: Hibernate, JDBC, JPA, OXM ✅ Testing: JUnit, Jupiter, Mockito, Unit Tests, Integration Tests 🛠️ Build Tools: Maven 🗄️ Databases: SQL, MySQL, PostgreSQL 🔄 Version Control: Git 💻 IDEs: IntelliJ IDEA, Eclipse, Neovim 🔗 Other: Java OOP, Collections, Exception Handling, Streams and Lambdas, Concurrency and Multithreading, Input/Output (I/O), Memory Management, Design Patterns, Annotations. What I Offer: 🌐 Backend Development: Building RESTful APIs and microservices with Spring Boot, ensuring efficient data handling and service integration. 📊 Database Management: Designing and implementing robust database schemas and optimizing SQL queries for MySQL and PostgreSQL. 🧪 Testing Excellence: Writing comprehensive unit and integration tests to ensure code quality and functionality. ⏩ Agile Methodologies: Familiar with Agile practices, enabling rapid development and iterative feedback. 🤝 Collaboration: Strong communicator who thrives in team environments, working closely with front-end developers, product managers, and stakeholders. Why Work With Me? ✨ I am passionate about technology and continuously seek to improve my skills and stay updated with industry trends. My approach combines technical expertise with a commitment to delivering quality solutions that meet your business needs. I take pride in writing clean, efficient code and always look for ways to enhance performance and scalability. Let’s Connect! 🎉 If you’re looking for a dedicated backend Java developer who can deliver results, I’d love to discuss your project further. Feel free to reach out, and let’s create something amazing together! Tags: #Java Spring, #Hibernate, #Java EE, #Apache Maven, #Apache Tomcat, #JavaFX, #JUnit, #Gradle, #Java Servlets, #Microservices, #Jakarta EE, #Android Development, #Java Persistence API, #Lombok, #Java Streams, #JPA, #Vaadin, #Java 17, #NetBeans, #IntelliJ IDEA, #Eclipse, #RESTful Web Services, #SOAP, #Apache Kafka, #JBoss, #Docker, #Kubernetes, #Spring Boot, #Thymeleaf, #JUnit 5, #Mockito, #Spring Security, #Vert.x, #Java Native Interface (JNI), #Apache Camel, #JavaFX Scene Builder, #Spring Data, #Apache Cassandra, #Jenkins, #SonarQube, #Log4j, #SLF4J, #Mockito, #Spring Cloud, #Apache Ant, #Java Mission Control, #GraalVM, #JavaFX CSS, #JDBC, #Eclipse IDE, #Java Web Start, #Netty, #Play Framework, #Apache Solar, #Java Card, #Java EE 8, #Quarkus, #MicroProfile, #Jakarta Faces, #Spring Batch, #Java RMI, #MikroORM, #JOOQ, #Jersey, #Selenium WebDriver, #Apache Spark, #Jenkins Pipeline, #Java Modularity (JPMS), #Spring Cloud Data Flow, #Apache Kafka Streams, #HikariCP, #Spring WebFlux, #Kotlin (for Java interoperability), #AspectJ.
    Featured Skill Core Java
    RESTful API
    Java ME
    Java Media Framework
    J2SE
    JavaFX
    MySQL Programming
    Java Collections Framework
    Java Persistence API
    Java Servlet API
    J2EE
    API
    MySQL
    Spring Boot
    Java
  • $30 hourly

    • 4.8/5
    • (13 jobs)
    Skilled Mobile Engineer with more than 8 years of development experience. Started as an Android developer and then move to work with Flutter and deliver applications to both platforms. Core skills: Strong knowledge of Dart, Kotlin, Java Core, Flutter, Android SDK Good understanding of OOP principles, REST, JSON, design patterns, Android Jetpack tools Proficient in XML, SQLite, Git IDEs: Android studio, IntelliJ IDEA, NetBeans English – upper intermediate Industry aware, good problem solving skills Experince in working with third-party libraries: Retrofit, RxJava, Volley, Dagger2, Butter knife, Gson, GraphView, Retrofit, Picasso, Realm, Social networks integration( Facebook, Twitter, Instagram), Google Maps API, Youtube API
    Featured Skill Core Java
    Google Maps API
    Object-Oriented Programming
    XML
    JSON
    SQLite Programming
    Material Design
    Android SDK
    Mobile App Development
    iOS Development
    Firebase
    Android App Development
    Dart
    Flutter
    Android
  • $40 hourly

    • 4.9/5
    • (11 jobs)
    I don't work with russian terrorists!!! Hello, Upwork community! I would be happy to provide you with my service, I represent an IT company is developing complex enterprise web applications, desktop applications and microservices using Java technologies. At SmartFoxPro ltd., we deliver unparalleled web&desktop development solutions to fit each of our customers’ unique business requirements and strategies. Our experts utilize new technologies, enhanced frameworks and mature methodologies to develop applications that facilitate business transformation. SmartFoxPro offers the best practices in web&desktop development to ensure reliable and successful deliverables. We pay maximum attention to solution architecture and code quality. By constantly mastering new technologies and approaches we ensure you’re getting quality you deserve. We have been working fore more than 9 years with such famous brands like: Liebherr, DHL, Knime, Oxceed (Germany). Also we have a lot of clients from UK, USA, Israel, China, Europe and India.
    Featured Skill Core Java
    Agile Project Management
    API
    Spring Framework
    RESTful Architecture
    Apache Tomcat
    Spring Boot
    JavaFX
    Desktop Application
    Software QA
    Web Application
  • $35 hourly

    • 4.7/5
    • (46 jobs)
    Java developer for 19 years. I have developed a web applications using Java, JSP, Servlets, DHTML, Java EE, JDBC and standalone Java applications. My competency lies in development of full end-end products. I'm seekin opportinities for build java based web applications, standalone Java applications or Eclipse plugins. Also have experience in the following areas: GWT, Swing, AWT, SQL, OOP, JUnit, OSGi, Maven, Ant, Git, SVN, CVS, Floreant POS, Marketcetera, Quickfix/J, Play 1.x, Docker and software design and testing.
    Featured Skill Core Java
    JavaFX
    HTML
    Spring Framework
    Java Persistence API
    KNIME
    J2EE
    Hibernate
    Jakarta Server Pages
    OSGi
    Java
    Eclipse IDE
    JavaScript
  • $100 hourly

    • 5.0/5
    • (27 jobs)
    Java developer with expirience in creation of domain specific languages, parsers compilers, Eclipse based IDEs Experience in development and optimization algorithm. Solid math background. Experience in article writing. The experience in optimization of calculations. Development client - a server of exhibits for keeping, statistical processing and visualizations result observations. The Experience of the development of the flash games and applications. The Experience of the development of the plays and exhibits for mobile telephone. The Design and development of the structure of databases. The Development of the user interface. TECHNICAL SKILLS SUMMARY Theory of formal languages, Syntax analyses, parsers, compilers, Domain Specific Language development Xtext, XTend language, ANTLR framework Java SE, SWT/JFace, Eclipse RCP, Xtext, Xtend, Java reflection, Swing, Sockets, Networking Java2EE, JDBC, Hibernate 3.0, Spring 3.0 (IoS, Aspects, MVC),Servlets/JSP GWT, GXT, LibGDX SAX, DOM, XSLT Research, problem solving skills. Good mathematic skills, higth speed of learning Game Development, game logic and artificial intelligence creation Flex 4.6 ActionScript 3.0, Adobe Air, Flash Media Server 4.0, Wowza media server PureMVC, Mate Good mathematical&algorithms skills, engines developing Flash browser games Ability to write articles& research skills GOF pattern Jasper Reports Eclipse, Intellij Idea, FlexDevelop, Flash Builder MySQL Postgress Maven GIT,SVN
    Featured Skill Core Java
    Plugin Development
    Algorithm Development
    JDBC
    ANTLR v4
    Compiler
    IDE
    Plugin
    JavaFX
    JetBrains IntelliJ IDEA
    JavaScript
    Eclipse IDE
    SWT
  • $40 hourly

    • 5.0/5
    • (10 jobs)
    As a dedicated Data Extraction/Web Scraping Specialist with a strong focus on Pipeline Data Processing using Python and Java, I excel at transforming complex, time-consuming tasks into streamlined, automated processes. My expertise lies in automating repetitive tasks ensuring efficiency and accuracy in data management. My approach is not about claiming to know everything; it's about continuously learning and mastering new techniques to deliver the best solutions. Presently honing my skills as a tech industry leader, I am also seeking freelance opportunities to expand my portfolio and further develop my data extraction and pipeline processing abilities. When you choose to work with me, your project will be my top priority. I provide exclusive attention to each client, ensuring we collaboratively develop a solution and the most optimal one for your needs. Let's set aside the concerns of hourly rates. Partnering with me means you're getting a commitment to efficiency, precision, and problem-solving prowess. Your data extraction and pipeline processing challenges allow us to work together toward innovative and effective solutions.
    Featured Skill Core Java
    Java
    Bot Development
    RESTful API
    CI/CD
    Computer Network
    JSON API
    SQL
    Spring Boot
    Web Crawling
    Data Scraping
    Data Extraction
    Python
    Beautiful Soup
  • $39 hourly

    • 5.0/5
    • (9 jobs)
    Kostyantyn has more than 10 years of experience in software development.
    Featured Skill Core Java
    Jakarta EE
    Apache Solr
    JavaScript
    NetBeans
    Spring Framework
    Oracle GlassFish Server
    Hibernate
    MySQL
    Apache Tomcat
  • $45 hourly

    • 5.0/5
    • (60 jobs)
    I'm an experienced and professional mobile and software developer doing freelance, working remotely (telecommute) and looking for great projects to work on. I love to make your ideas alive. I care about every single line of my code. Summary of Qualifications • Expert understanding of core mobile technologies standards • Development of software, mobile web apps • Solid understanding of how the android OS works for the best performance • Passionate about all aspects of development • Modern tooling and workflow • Ability to write high-performance, maintainable and reusable code • Appreciation for quality, usability, user experience (UX), accessibility and compatibility • 5+ years of experience • Highly motivated, self-starter, fast learner, hard worker, organized, attentive to details and a team player • Good communication skills. Fluent in English , both written and verbal • Sense of aesthetic and design • Always up-to-date with the latest technologies, techniques, optimizations and best practices Hire me!
    Featured Skill Core Java
    Mobile App Development
    Android App Development
    In-App Purchases
    Camera
    Social Media Account Integration
    Android
    Java
    Firebase
  • $60 hourly

    • 5.0/5
    • (9 jobs)
    Good English, a lot of energy and youth quick-thinking. Excellent communication skills: an attentive listener, articulate speaker and persuasive negotiator in English, Russian and Ukrainian. Goal oriented, hard-working, fast-learning person. Almost four years of experience as a DevOps engineer for different projects. 5+ yrs of exp on AWS platform 5+ yrs exp of Docker One year of experience as Java developer. Java SE, EE. Experience in a variety of Java frameworks I am seeking opportunities to get an interesting project.
    Featured Skill Core Java
    ELK Stack
    Hybris
    Linux System Administration
    Java
    Docker
    Apache Tomcat
    Amazon Web Services
  • $50 hourly

    • 5.0/5
    • (3 jobs)
    Greetings, It is a pleasure to make your acquaintance through my profile. Although I am a newcomer to the Upwork platform, but at the same time I am the founder of the IT company "Centum-D." Concurrently, I boast a remarkable 15-year tenure in the realm of IT development. Our primary area of expertise lies in Custom Software Development. "Centum-D" stands as an international software development company, dedicated to delivering comprehensive web and mobile development services, encompassing UI/UX design. Our commitment extends from the initial specification and mockup phase to the eventual product launch and ongoing market support. Since our establishment in 2008, we have successfully executed over 300 projects for a diverse clientele, including corporate innovators, technology start-ups, and entrepreneurs on a global scale. We take pride in our distinction as a "Top Rated Plus" entity, placing us within the 🏆 top 1% of Upwork talent. My journey ☕ commenced as a web developer in 2008, and today, our offerings encompass full-cycle 🔥 custom software development services . Our proficiency revolves around several core technologies: * PHP * Python * Java Our operational scope encompasses the entire Software Development Life Cycle (SDLC). The adept members of my team collaborate to create solutions that confer competitive advantages to our esteemed clients. This team comprises seasoned developers, adept project managers, accomplished UX/UI designers, and experienced marketing professionals, boasting an average of eight years of industry experience. Our prowess extends across various domains: * Financial services and Insurance (Fintech, Insurtech solutions, modernization of legacy software, microservices architecture development, DMS, CMS, CRM, CPP-integrated applications) * Real estate (mortgage and property management, broker solutions, accounting, mobile apps, MLS/IDX integrations) * Transportation (logistics and fleet management, warehousing software, tracking and user apps for drivers) * Health and fitness (patient portals, applications for medical practitioners and patients, data tracking) * E-Learning (Learning Management Systems, educational platforms, educational apps) * Ecommerce (Online stores, marketplaces, trade portals, mobile commerce solutions, payment system integration) * Travel (travel portals, hotel management software, travel mobile apps, booking systems, ratings and reviews, payment gateways) * Blockchain applications across diverse industries, including NFTs, auction portals, crypto-wallets, trading apps, and blockchain-based payment/billing solutions. Thank you for taking the time to familiarise yourself with my profile. I look forward to the prospect of collaborating on innovative projects that yield mutual success. Best regards, Valerii
    Featured Skill Core Java
    PostgreSQL
    Vue.js
    Python
    Java
    HTML5
    SQL
    Git
    Magento
    MySQL
    Front-End Development Framework
    Back-End Development Framework
    Yii2
    Laravel
    PHP
  • $40 hourly

    • 4.7/5
    • (105 jobs)
    I am an android developer with 5 years of experience. I write native android applications in both java and kotlin. I had experience many different sdks used in android applications, such as firebase, maps, bluetooth, nfc, face detection, in-app purchases, usb devices and many others. I also have good experience with custom and external devices with their own sdks Besides I have a strong background in Finance and Mathemathics I am fluent in 4 languages: English, French, Russian and Ukrainian. Can make a quality translation from/to any of them if needed.
    Featured Skill Core Java
    Firebase
    Android SDK
    Native App Development
    Kotlin
    Android
    Android App Development
  • $35 hourly

    • 0.0/5
    • (0 jobs)
    Experienced Flutter/Android Developer with a demonstrated history of working in the computer software industry. Skilled in Java, Retrofit, Dagger, RxJava, Android Development, and XML. Strong engineering professional
    Featured Skill Core Java
    Android
    Flutter
    Dagger 2
    Model View Presenter
    Android App Development
    Retrofit
    Mobile UI Design
    Web Design
  • $12 hourly

    • 5.0/5
    • (23 jobs)
    ⚡ 3+ years of experience in Manual and Automation testing. ⚡ Skills: ● Manual Testing ● Automation Testing ● Java core (basic) ● Selenium/Selenide ● API testing ● Git: GitHub, GitHub Actions ● AWS Device Farm ● Postman ● Jira ● Katalon Studio ⚡ I was involved in developing documentation and conducting manual testing of APIs and UIs for both mobile and web platforms. Additionally, I create automated tests using java + Selenium/Selenide and Katalon Studio frameworks. I integrated these automated tests with GitHub Actions and AWS Device Farm. The projects I worked on were related to Healthcare, Social Networks, and E-Education. ⚡I am very responsible and flexible for new people or jobs.
    Featured Skill Core Java
    Test Plan
    QA Engineering
    Software QA
    Mobile App Testing
    Test Automation Framework
    Component Testing
  • $20 hourly

    • 5.0/5
    • (3 jobs)
    Hello, my name is Dimytro. I am Java developer from Kyiv, Ukraine. I am developing Java since 2019.
    Featured Skill Core Java
    JavaFX
    Python
    Django
    Flask
    API
    Spring Framework
    RESTful API
    PostgreSQL
    Spring Data
    Java
    Spring Security
    MySQL
    Spring Boot
  • $15 hourly

    • 5.0/5
    • (1 job)
    I am a highly motivated and energetic Java developer caring about goals of the project and my client's business needs. To give an idea of my skill set, I'm good at the following technologies: - back-end * Java 8+, Java EE, Java SE * Spring framework(loc, DI), SpringMvc, Spring JPA, Spring Cashe, Validation, Security, Mail, Internationalization, Swagger * Hibernate * Thymeleaf * Database (PostgreSQL, H2, MySQL, MongoDB) * Unit testing (JUnit, Mockito) * Maven * RESTful API, REST API * Migration (Flyway) * DTO (MapStruct) * Lombok - front-end * JavaScript, HTML, CSS * JQuery - others * Postman * Docker * Git Quick learner and willing to do all it takes to get a job done well. Feel free to reach me out to discuss your project's details and let's bring it to life!
    Featured Skill Core Java
    Object-Oriented Programming
    Migration
    Swagger
    Spring Framework
    PostgreSQL
    Thymeleaf
    Spring MVC
    jQuery
    Docker
  • $27 hourly

    • 5.0/5
    • (127 jobs)
    My area of expertise is an HCL Notes (formerly IBM Lotus) and MSOffice VBA. I have 24 years of Lotus Domino developing and administration: - administering of Lotus Domino server versions R6, R7, R8.5; R9; R12 - replications settings, mail routing configuration, mail troubleshooting; - application development; - excellent knowledge of LotusScript, @-Formula, Domino Object model; - MS office with Lotus integration, ODBC connection; - migration from Lotus(mail) into Google Apps using Google Tool (GAMLN); - developing application in Lotus which works with Google Docs; - creation REST api for Lotus database using webservices; - experience in creation of java Lotus Server Addins; 7 years of VBA macro development. Complex excel data manipulation is my passion. I provide development of Excel VBA macro - tasks of any complexity, starts from simple formatting and ending with (but not limited) processing of big data sets, data permutations and manipulations, export to/from formats PDF, Excel, Word, txt, CSV, XML, JSON, creation of Userforms. Data analysing tools in Excel, Adword Keywords/campaigns reorganizing and formatting, REST API's, Telegram Bot API, Google API's In case you have in Excel (or with csv, txt, word files) a very repetitive tasks - I can easely automate it and save your time and efforts. web data scraping. I can give you 100% accuracy when processing your data. I am hardworking and reliable.
    Featured Skill Core Java
    Desktop Application
    XML
    C#
    XSD
    HCL Domino
    Microsoft Outlook Development
    XSLT
    HCL Notes
    Microsoft Excel
  • $30 hourly

    • 4.6/5
    • (75 jobs)
    Hello there!🤟 I'm open to a new project 📆 🎈 Looking to bring your dream project to life from scratch? 🎈 Need a fresh, standout design? 🎈 Or perhaps you need a hand with reviewing an existing project? 🎈 Maybe you’re looking to fine-tune or improve your current app? 🤩 You’re in the right place! A few things about me: ✅ I have experience with iOS, Android, UX & UI design, web development, and backend development; ✅ I create polished, pixel-perfect apps with clean, bug-free code; ✅ I’ve completed over 300 projects, guiding each one from concept to release and ongoing support; ✅ As a team leader, I bring 15+ years of experience managing projects of all complexities; ✅ My work spans various fields: FinTech, e-commerce, healthcare, CRM, maintenance apps, Uber-like services, streaming platforms, and more; ✅ I’m known for strong analytical skills and am backed by a great team that’s ready to tackle projects of any complexity. Keywords to find me: Zeplin, Invision, Principle, Balsamiq, Axure, Sketch, Figma, Firebase, Swift, GraphQL, RxSwift, Hubspot CRM, OAuth 2.0, AWS S3, Zendesk, Objective-C, UIKit, SwiftUI, CoreData, Metal, OpenGL, DSP, inDoor Navigation, outDoor Navigation, Declarative UI, Code generation, Shared Preferences, CCC, Unidirectional, Nimble, Socials, WebSockets/WSS, Remote Notifications, Data Encryption, REST, Social Auth, Custom Analytics, CI/CD, Apple Distribution, Auth0, PayPal, WebRTC, GitFlow, Plaid, Apple inApps, Git, LiveStreaming, Apple Pay, Stripe, Twilio, Flurry, Keychain, Quick, MVVM, Kotlin, Retrofit, Dagger, Google Maps, Java, Redux, Compose, AppsFlyer, Room, C++, MVI, JUnit, Espresso, Mockito, Cucumber, Turbine, Coroutines, RX, Ktor, Jackson, Kotlinx Serialization, ExifInterface, Paging, Dropbox Store, S3 Uploading, Material, Exo Player, Google Analytics, Lottie Animation, Epoxy, Glide, Picasso, Coil, Koin, HILT, ViewModel, Leak Canary, Timber, Protobuf, Work Manager, Spotless, Mixpanel, MVP, Navigation, Secured Shared Preferences, Ethernet, Accompanist, Agora, Datastore, Pure SQLite, Realm, Google Distribution, Google InApps, Google Pay.
    Featured Skill Core Java
    Dart
    Objective-C
    UI/UX Prototyping
    Web Application Development
    UX & UI Design
    Figma
    Wireframing
    Node.js
    Swift
    Kotlin
    Mobile Development Framework
    Flutter Stack
    iOS Development
    Android
  • $7 hourly

    • 5.0/5
    • (14 jobs)
    java se 6, Algorithms, Transact SQL, Sybase ASE job experience 3 months as Java junior developer + 7 months here. enterprise application experience 3 tier business application: swing client, server (they own via xml), sybase db. Game engine development good knowledge of math, physics. JUnit.
    Featured Skill Core Java
    Algorithm Development
    Transact-SQL
    JUnit
  • $25 hourly

    • 5.0/5
    • (24 jobs)
    I have 8 years experience of backend development. During this time I worked in many IT companies and projects. I develop enterprise applications on Java. My technology stack includes: Java; Multithreading; SpringBoot; Spring Security, JWT, OAuth 2, Keycloak; Spring Data JPA, Hibernate; Docker, Kubernetes; Microservice architecture; REST API development; AWS infrastructure; Unit tests; Maven; Jenkins; Git, Bitbucket; Apache Kafka; MySQL, PostgreSQL, MongoDB, Redis. I usually work using Jira, Confluence, Slack, IntelliJ IDEA. I prefer to work in team, so Agile and Scrum are my best friends. Also I can create websites and landing pages using different CMS. And I'm an expert in WordPress. I know PHP, MySQL, JavaScript, jQuery, HTML5, CSS3, Smarty, and I have other skills. I am an adherent of the purity code. I am a prudent and meticulous person. You can watch my sources on Bitbucket: bitbucket.org/gribozi
    Featured Skill Core Java
    Apache Kafka
    RESTful API
    OAuth
    Spring Boot
    HTML
    JUnit
    Apache Maven
    WordPress
    CSS
    Kubernetes
    Docker
    Git
    Java
    PostgreSQL
  • $28 hourly

    • 4.9/5
    • (348 jobs)
    I am working as a business analyst in a product IT company developing a trading platform. In my job I use Excel, experience in the financial markets and programming. At Upwork my main field is writing indicators/expert advisors and scripts using MQL4 programming language for MT4 trading terminal (forex market). MT5 and cross-platform MT4/5 scripts are also possible. I can also use Java in some kind of complex analysis. My experience with MQL4 is 7 years, I am serving the upwork clients for 5 years. Additionally I have experience in gathering requirements as it-business analyst. Hourly contract is preferred. Not interested in small tasks. 2 hours / 50$ is the minimum.
    Featured Skill Core Java
    Financial Accounting
    MQL 4
    Algorithm Development
    Microsoft Excel
    Financial Analysis
    MetaTrader 4
    Forex Trading
  • $45 hourly

    • 4.2/5
    • (4 jobs)
    General overview ● Java Developer with 8 years of professional experience. ● Professional experience highload services, measure performance, implement statistics dashboards, debug and fix slow segments. ● Strong technical experience in the development Rest API with Spring, design of new components, refactoring existing code, testing. ● Experience with microservice architecture implementation and designing applications from scratch. ● Actively participating in architecture discussions, proposing and implementing design patterns and solutions to address scalability, maintainability, and security challenges. Team and Project Management ● Mentor and coach team members to enhance technical skills, improve productivity, and promote a culture of continuous learning. ● Conduct code reviews, enforce coding standards, and implement best practices. ● Experience in SCRUM methodology, setup sprint goals for the team and achieving sprint goals. ● Collaborate with cross-functional teams, including product managers, quality assurance, and stakeholders. ● Jira adaptation for new development processes. Domain Expertise ● In the fintech domain, successfully integrated card payments, implemented transfers between IBAN accounts, and worked on currency exchanges between fiat and non-fiat currencies. ● In a medical application, I significantly enhanced security measures for authorization, successfully resolved drug price mismatches, and optimized import jobs. ● In a Big Data project, I led efforts to optimize the performance of TV rating calculations. ● For Internet Service Providers in the USA, I was involved in the design and successful implementation of price calculation logic. Feel free to contact me and I'll help you at any stage, from an idea or small app to a full-scale solution. My goal is to provide you with best solutions.
    Featured Skill Core Java
    Java Collections Framework
    JetBrains IntelliJ IDEA
    PostgreSQL
    Apache Maven
    Docker
    Apache Kafka
    Git
    Cucumber
    Java
    MongoDB
    MySQL
    JUnit
  • $25 hourly

    • 5.0/5
    • (6 jobs)
    Talanted java / scala software developer in-love with standalone and server - side applications developement. * My current experience includes 7+ years in the development of a broad variety of Enterprise-grade software products on the JVM platform. * I have good expertise in a wide range of main software product archetypes and architectures, including Micro-services, Serverless applications (FaaS), Monolith web applications and Desktop applications. * I have a deep knowledge of both Java and Scala software development stacks and their frameworks, understanding main development principles for them, including Functional/Reactive and Object-Oriented programming paradigms. * Client projects include Adidas, Empowered Systems, Divvy (Divvy Parking Pty Ltd), COOP (COOP retail), Transgourmet (Transgourmet Deutschland GmbH & Co. OHG), Migros (Migros Ltd), MeteoGroup.
    Featured Skill Core Java
    NoSQL Database
    Algorithm Development
    Scala
    Java Persistence API
    Play Framework
    Java
    XML
    Kotlin
    Spring Boot
    Spring Framework
    RESTful Architecture
    SQL
  • $10 hourly

    • 5.0/5
    • (109 jobs)
    I'm computer engineer with 5+ years experience in data Scraping & Mining. For each task, I use my own Java software. My main services are: · Data Scraping / Mining / Gathering (Phone numbers, email etc.). · Creation of automatic services (daily check) on my dedicated server. · Cold emails sending for marketing campaigns. $0.01 per email.
    Featured Skill Core Java
    Data Mining
    Lead Generation
    Email Marketing
    Data Scraping
  • $27 hourly

    • 0.0/5
    • (1 job)
    ● 4 years of professional experience; ●. Professional experience in detecting issues in highload systems, implement statistics dashboards, debug and fix slow segments of a system; ● Clear understanding of the software development process and following best agile practices; ●. Strong technical experience in the development Rest API, design of new сomponents, refactoring existing, testing; ● Well-motivated and hardworking developer; ●. Ability to work fully independently and in a team as well.
    Featured Skill Core Java
    RESTful API
    Selenium
    Apache Maven
    Apache Kafka
    Spring Framework
    JUnit
    Java Collections Framework
    Docker
    Java
    JetBrains IntelliJ IDEA
    Scala
    PostgreSQL
    MySQL
    MongoDB
  • $23 hourly

    • 0.0/5
    • (0 jobs)
    I'm an Android developer since 2015. I actively learn modern technologies to write high-quality and fast code. My skills are the following: - Java/Kotlin; - Jetpack libs; - Social networks API - Compose; - Retrofit; - Firebase; - Room;
    Featured Skill Core Java
    Room
    SQLite Programming
    Android Room Persistence
    Android App
    Android Tablet
    Android SDK
    Java
    Android App Development
    Kotlin
    Spring Framework
    RESTful Architecture
    Retrofit
    Android Studio
    Android
  • $30 hourly

    • 4.3/5
    • (3 jobs)
    Hi all, I have been working as a Mobile developer for 7+ years, the last year I mainly wrote on Java and Kotlin. I had several projects written on Flutter. Have experience in creating high-performing mobile apps architectures from scratch for different devices type (Tablet and Phone). Worked on projects of varying complexity, both on large product projects and on startups. For example drivers, taxi applications, applications for accounting and product orderings, for the work of staff, news, training, and sports. Moreover, I have expertise in the FinTech domain. The main financial application implemented the possibility of small loans online, we used a lot of interesting cutting-edge technologies, it was a challenging and fruitful experience. Brief summary: - 7+ years of professional experience in mobile development - highly skilled in technical architecture design for high-loaded products - always willing to provide my suggestions related to product improvements - follow best practices, creative and responsible worker - strong organisational and problem-solving skills - excellent skills of working under pressure and tight deadlines Programming languages: Java, Kotlin Android: MVVM, MVP, Redux, CleanArchitecture, Jetpack Compose, RxJava, Dagger2, Koin, Kodein, Hilt, Android JetPack, Compose WebSocket, Coroutines, DataBinding, Cicerone, LiveData, SQLite, Room, Realm, Kodein, APIs: REST API, Firebase, Google Map, OSMdroid, Facebook API, Twitter API, Amazon Web Services etc. Tools: Android Studio, Jira, Trello, Upwork, Git, Bitbucket, Gitlab, GitHub. PM Processes: Agile, Scrum, Kanban. If you are looking for a reliable, creative and experienced IT professional, you have come to the right place - I will eagerly become your longtime partner. Let's start to work together!
    Featured Skill Core Java
    Model View ViewModel
    Git
    Jira
    JetPack
    Koin
    Dagger 2
    Coroutine
    RxJava
    Apple Xcode
    Dart
    RESTful Architecture
    Firebase
    Flutter
    Java
    Kotlin
    Android
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