Hire the Best Vaadin Framework Specialists
in Sri Lanka

I am a highly competent freelancer who delivers high-quality work for the client. I am very much used to effectively working in distributed teams. Also, mostly I work only for one client for a period of time which improves my productivity. Over 15 years of J2SE/J2EE working experience (6 years Singapore-based experience), participating in architecture, system design, database designing, development, implementation, and client handling. ● Over 12 years of thorough knowledge in developing web applications using JSF, Flex, EJB, Spring, JPA, Hibernate, and JMS. ● Over 6 years of expertise in Spring Boot, Microservices, REST, Kafka, Mockito, SonarQube, Fortify, Flyway, Swagger/OpenAPI, Grafana, and AWS. ● Over 13 years of expert knowledge of both imperative and reactive programming paradigms ● Working knowledge of Docker and Kubernetes ● Agile Methodology Experience ● Over 13 years of extensive experience in SQL and NoSQL Database design, Database maintenance, backup automation, performance tuning ● Experience leveraging AI tools and understanding core ML/Neural Network concepts in software development workflows.

Need a backend that works in production — not just on your laptop? I'm a Backend Developer who builds reliable APIs in Java/Spring Boot and Python/FastAPI, and rescues the ones that are quietly falling apart. If your backend is slow, buggy, or scary to deploy, I can help. What I build for clients: REST APIs that handle real traffic (Spring Boot, FastAPI) Database layers that don't choke under load (PostgreSQL, MySQL, SQL tuning, indexing) Clean Docker + Docker Compose setups your team can actually maintain Kubernetes deployments and troubleshooting AWS deployments with NGINX, Redis, and proper reverse proxy configs Third-party API integrations that don't silently fail Backend automation scripts that save your team real hours Where I tend to add the most value — real-world debugging: Session handling and autosave issues, token expiry bugs, Tomcat misconfigurations, Gradle build problems, slow queries in production, containers that work locally but break in K8s, reverse proxy headaches. The kind of issues that aren't on Stack Overflow. How I work: Clear, frequent communication — you'll always know where things stand Clean, maintainable code — no shortcuts that haunt you in 6 months Honest timelines — I tell you what's realistic, not what sounds good I finish what I start Tech I work with daily: Java, Spring Boot, Python, FastAPI, PostgreSQL, MySQL, Redis, Docker, Kubernetes, AWS, Linux, NGINX, REST APIs, SQL. Whether you need a new API built from scratch, a production bug fixed before it bites you again, or someone to clean up a messy deployment — send me a message describing what you're working on. I'll reply with honest thoughts on whether I'm the right fit and how I'd approach it.

Hi, I am from Galle, Sri Lanka , an expert Java developer. I have 21+ years of experience working wit Java and web developments. I have specialized expertise in Service Oriented Architecture (SOA) and Sound with micro-service architecture. In my Upwork career, I have implemented several successful projects with web services. Also, i have done successful B2B integrations via different APIs like REST/SOAP/XML. Also, I have good knowledge and experience working Java, Multi-Threading, Concurrency...etc.I am sound with the Spring framework (Spring boot, Spring MVC + Thymeleaf, Spring Security, Spring Data JPA...etc), J2EE (Jakarta EE) , JMS , JPA, Hibernate, JFX ...etc. For more details, please visit my profile. I have a top-rated Upwork profile. Also, I have strong database knowledge and have worked with MySql , MSSQL, Postgres, Oracle...etc. I am sound with PHP, Pearl, Bash, Python, Lua, Javascript like scripting languages. Also, I have good experience with handling Windows/Linux operating systems.

⭐️ 1000+ hrs 💼 10+ Years Experience I am a highly skilled and dedicated Java Spring Boot Developer with over 10 years of professional experience. My expertise spans various industries, including finance, e-commerce, and healthcare, where I've consistently demonstrated my ability to drive projects from concept to completion, ensuring they meet stringent quality and performance standards. I am looking for full time & long-term working relationships Listed below are my areas of expertise and tools I am familiar with. ✅Programming Languages - Java, JavaScript, Typescript ✅Spring Stack - Spring Framework, Spring Boot, Spring Security, Spring Batch ✅JEE Technologies - Hibernate, JPA, Apache Kafka ✅Databases - MySql, PostgreSQL, Oracle, MongoDB ✅Build Tools - Apache Maven, Gradle ✅API - Open API, GraphQL ✅Security- OAuth2, OIDC, KeyCloak ✅Testing - JUnit, Mockito ✅IDE - Eclipse, IntelliJ Idea, VS Code ✅Version Control - Git, SVN, TFS ✅DevOps - docker, Spinnaker, Terraform, Helm, Ansible, Octopus, Splunk ✅Cloud - AWS, Azure, Kubernetes ✅Design Patterns - Micro services, CQRS, OOP If you're looking for a dedicated and experienced developer who can deliver high-quality code and drive successful project outcomes, I'd love to chat with you. Let's work together to turn your vision into reality.