Hire the Best Eclipse Developers & Programmers

🚀 I help startups and enterprises build scalable, production-ready software with a strong focus on Java, Spring Boot, and modern backend architecture. As a Software Engineer, I have designed and delivered systems ranging from start-up MVPs to enterprise and government platforms serving thousands of daily users. My expertise is cantered around building clean, maintainable, and high-performance backend applications, while also collaborating across the full software stack whenever projects require it. What I can help you build: ✔ Java & Spring Boot Applications ✔ REST APIs & Backend Services ✔ Microservices Architecture ✔ Authentication & Security (JWT, OAuth2, Keycloak) ✔ Event-Driven Systems (Kafka, RabbitMQ) ✔ Database Design & Optimization ✔ Performance Optimization ✔ System Integration ✔ Cloud-ready Applications ✔ Software Architecture & Code Refactoring Technologies I work with include Java, Spring Boot, Spring Security, Hibernate, PostgreSQL, MySQL, MongoDB, Redis, Kafka, RabbitMQ, Docker, Camunda, Keycloak, AWS, and modern observability tools. Beyond my primary backend expertise, I have also delivered successful projects using Python, FastAPI, Django, React, Next.js, Flutter, and Supabase whenever they were the right technology for the job. 🌟 Highlights • Architected and developed the complete backend microservices platform for "Crewpr", a Dubai-based startup, designing 10+ microservices, integrating multiple third-party services, and building a scalable production system serving thousands of active users. • Contributed to digital transformation projects for Irish government organizations, including Enterprise Ireland, NEH, and Startup Ireland, building secure and scalable backend systems. • Improved the performance and scalability of Yugo, a large-scale European student accommodation platform, by developing backend features and integrating external hospitality systems including RentCafe, Student Suite, and Entrata.

I'm a Java developer and full stack developer with 5+ years building backend systems, REST APIs, microservices, and full stack web applications. As a full stack developer, I work end-to-end with Java and Spring Boot on the backend, React and Angular on the frontend, but backend engineering is where I spend most of my time and add the most value. On the backend, my core stack is Java, Spring Boot, and Spring Framework, with REST APIs, Hibernate/JPA, PostgreSQL, MySQL, MongoDB, and SQL for persistence. As a backend developer, I've designed 120+ REST APIs and built 10+ microservice architectures from the ground up, for systems serving anywhere from 10K to 500K+ users depending on project scale. I've shipped 35+ production projects as a full stack developer and Java developer, across fintech, logistics, telecommunications, retail, SaaS, healthcare, and enterprise. For infrastructure, I work across AWS, GCP, and Azure, and I'm comfortable with Docker, Kubernetes, and CI/CD pipelines to keep backend systems reliable in production as part of full stack delivery. Performance is something I take seriously as a backend developer: on several engagements, I've cut API response times by up to 60% and improved overall system performance by 40%+ through targeted refactoring and architectural improvements, rather than costly rewrites. I've also worked extensively with enterprise-level database schemas, writing and optimising complex SQL queries, indexing strategies, and data models across tables with 100K+ records. The production systems I've maintained as a Java backend developer have consistently held 99.9% uptime, that doesn't happen by accident. It comes from solid monitoring, thoughtful deployment practices, and knowing where the failure points are before they become incidents. When a project calls for it, I also write Python, PHP, and Node.js, and handle frontend work in React or Angular including JavaScript for client-side logic, but as a full stack developer, my strongest work is where backend architecture meets a clean frontend implementation My clients get clear communication, fast responses, and code that's actually maintainable six months later. I'm business-focused and I care whether the thing solves your problem, not just whether it compiles. As one client put it: he doesn't just write code, he thinks about why we need it in the first place. Beyond hands-on Java development, I've led teams, mentored junior developers, and run cross-functional projects where the technical and human sides both needed managing. I'm open to long-term collaborations and challenging projects involving Java, Spring Boot, full stack development, backend architecture, React, Angular, cloud systems, and microservices. Need a full stack developer, Java developer, or backend developer who ships clean code and tells you when you're building the wrong thing? That's the conversation worth having. Drop me a message.

I am a Senior Android & Mobile Developer with over 10 years of experience, including 5+ years of professional work building high-performance apps and automation frameworks. My expertise spans Android OS (AOSP), Kotlin, Java, and Flutter, with a strong background in rooted device modifications, reverse engineering, and system-level customization. I specialize in: - Developing native Android apps with scalable architecture (MVVM, MVP, Clean Architecture). - Building automation frameworks using Selenium, Robotium, and Android Instrumentation. - Reverse engineering Android apps & firmware with Jadx, Apktool, Frida, and Ghidra to uncover vulnerabilities or create custom features. - API integration and debugging using Postman, Charles Proxy, Fiddler, and Wireshark. - IoT and Embedded Systems integration, connecting hardware with mobile apps for robotics and smart devices. Why clients choose me: - Proven track record working on advanced system apps and custom Android features at a German tech company. - Strong focus on clean, secure, and maintainable code, following SOLID principles and Agile methodologies. - Experience collaborating with global teams and delivering solutions that boost performance, scalability, and security. If you're looking for a developer who understands Android from the inside out, can automate complex tasks, or debug at the system level, let’s discuss how I can help bring your project to life.

Senior Fullstack Software Engineer | Java, Node.js, React | CMS & IoT Expert 🚀 About Me I am a Senior Fullstack Software Engineer with 4+ years of experience in developing high-performance web applications, CMS platforms, and IoT solutions. My expertise spans across Java Spring Boot, Node.js, React, Magnolia CMS, and cloud-based architectures. I have led teams, optimized complex systems, and built scalable solutions for enterprise-level clients. 🔹 Backend: Java Spring Boot, Node.js, NestJS, Microservices, GRPC 🔹 Frontend: React.js, React Native, Headless CMS 🔹 CMS: Magnolia CMS, Liferay, WordPress 🔹 Databases: MySQL, MongoDB, SQL Server 🔹 DevOps & Cloud: Docker, Kubernetes, GitLab CI/CD, AWS 🔹 IoT & AI: Zigbee, MQTT, OpenCV, AI-based detection systems 💼 Notable Projects ✅ MMP’s CMS Website: Built a Java Spring Boot-based CMS optimized for high traffic and large datasets. ✅ Dentsu’s Headless CMS: Developed a scalable API-driven CMS using Magnolia CMS and React. ✅ Yoolife & YooIOC Applications: Smart city applications for residential and operational management. ✅ IoT Platform for Smart Devices: Developed a gateway integrating Zigbee, Z-Wave, and BLE devices with AI-powered event detection. 🔍 Why Work With Me? ✔ Proven expertise in enterprise CMS solutions & IoT systems ✔ Strong problem-solving skills in system architecture & optimization ✔ Experience leading development teams & mentoring junior engineers ✔ Passionate about building scalable, high-performance applications Let’s connect and bring your ideas to life! 🚀

With 10+ years of experience in web, mobile, and enterprise systems, I specialize in building automation frameworks, improving release quality, and reducing regression effort across the entire development lifecycle. I help startups and SaaS teams deliver faster with reliable, scalable test automation and strong QA processes. What I Do: 🔷 Design and implement end-to-end test automation frameworks 🔷 Perform UI, API, and performance testing 🔷 Integrate automated tests into CI/CD pipelines (GitHub, Jenkins, GitLab) 🔷 Create test strategies, test cases, and QA processes 🔷 Ensure high-quality releases with clear reporting and metrics My Approach: 🔷 Understand requirements and business flows 🔷 Identify high-risk areas and define test strategy 🔷 Design scalable automation framework (Selenium, Cypress, Playwright) 🔷 Build and maintain automated test suites (UI + API) 🔷 Integrate with CI/CD for continuous testing 🔷 Provide clear reports and continuous improvements Expertise: 🔷 Automation: Selenium, Cypress, Playwright, Appium 🔷 API Testing: Postman, Karate, REST APIs 🔷 Performance: JMeter, Gatling 🔷 Languages: Java, Python, JavaScript/TypeScript 🔷 CI/CD: Jenkins, GitHub Actions, GitLab CI 🔷 Reporting: Allure, TestRail 🔷 Database: MySQL, PostgreSQL, SQL What Makes Me Different: 🔷 Strong focus on automation-first QA strategy 🔷 Experience with enterprise and SaaS platforms 🔷 Ability to work independently and improve QA processes 🔷 Clear communication and reliable delivery AI-Enhanced Testing: I also leverage AI tools such as GitHub Copilot and Cursor to accelerate test development, generate test cases, and improve automation efficiency. This helps reduce implementation time while maintaining high-quality, maintainable test code. I apply AI to: 🔷 Generate and optimize automation scripts (Selenium, Playwright, Cypress) 🔷 Speed up Cucumber scenarios and test case creation 🔷 Improve test coverage and edge case identification 🔷 Support faster debugging and code refinement Last updated: Mar 23, 2026

I deliver production-ready Java backends that scale. With 100% Job Success and $10K+ earned across 22 contracts, I solve complex integration challenges, refactor legacy systems, and build APIs that handle real-world traffic. Client Testimonials: "Oleksandr is a genuine professional who was able to do a complex Java project for me." – Sweet Home 3D Client "Fast developer, always in contact, reasonable price policy. Would work with him again." – Spring Boot Projects Client What I Deliver: Spring Boot APIs – REST endpoints, authentication (Spring Security), database integration (JPA/Hibernate) Database Solutions – PostgreSQL schema design, query optimization, MongoDB aggregations Legacy Refactoring – Clean up messy code, introduce testing (JUnit/Mockito), containerize with Docker Third-Party Integrations – Payment gateways, calendar APIs, external data syncs Testing & Quality – Unit tests, integration tests, TestContainers for reliable deployments Tech Stack: Backend: Java (8/11/17/21), Spring Boot, Spring Data JPA, Spring Security, Hibernate Frontend: CSS/HTML, JavaScript/TypeScript Databases: PostgreSQL, MySQL, MongoDB APIs: REST, JSON/XML, Swagger/OpenAPI Testing: JUnit, Mockito, TestContainers DevOps: Docker, Maven, Git, GitHub Actions Principles: OOP, SOLID, TDD, GOF Design Patterns Why Hire Me: ✔ Fast turnaround – Average response time: 0-4 hours ✔ Clear communication – Tagged "Clear Communicator" by 5 clients ✔ Proven reliability – Top Rated, 100% Job Success, no failed contracts ✔ Real-world experience – From startups to clinical trial systems Have a backend challenge? Let's architect a solution together. 📩 Send me your project details, and I'll respond with a technical approach within hours.