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I am an ACM-ICPC World Finalist and software engineer. I have been developing backend and DevOps solutions using C++, Java, and Python since 2016. I have experience in multiple domains that include fintech, agrotech, health tech, IoT, and Saas. I have been working as a remote developer with globally distributed teams since 2019. I am a quick learner, good with communication, proactive and punctual human being. Nothing excites more me than a challenge that is necessary but difficult to solve. I am also a competitive programmer and expert in data structures and algorithms. I have a decent understanding of UNIX systems especially how different types of data structures are blended to solve complex problems of operating systems. I am a team player and can work as solo as well. I never compromise the quality of my work doesn't matter how the pressure is. And, I believe in requirement analysis as the most crucial part of engagement.

OCJP Certified Java Architect | Spring Boot | Microservices | AWS | Kafka | Camunda | 13+ Years Experience With 13+ years of professional experience in designing, developing, and deploying enterprise-grade applications, I help businesses build scalable, secure, and high-performance cloud-native solutions. My expertise spans Java, Spring Boot, Microservices Architecture, AWS Cloud, Kafka, Redis, Docker, Kubernetes, CI/CD, OAuth2, Keycloak, JWT, and Camunda BPM. Key Highlights: ✔ OCJP Certified Java Professional ✔ 12+ Years of Software Development Experience ✔ Microservices & Cloud-Native Architecture Specialist ✔ Banking & FinTech Domain Expertise ✔ RESTful APIs, Event-Driven Systems, and Distributed Architecture ✔ AWS Cloud Deployment & DevOps Automation ✔ Security Implementation with OAuth2, JWT, Keycloak, LDAP, and Okta Recent Accomplishments: ✅ Designed and implemented cloud-native microservices using Java, Spring Boot, Spring Cloud, Docker, and Kubernetes. ✅ Built FinTech and Banking solutions integrating payment gateways and remittance platforms, including Stripe, RIA, and Instant Cash Exchange House APIs. ✅ Developed high-performance event-driven architectures using Kafka and Redis for real-time processing and scalability. ✅ Automated deployment pipelines using Jenkins, Docker, Kubernetes, SonarQube, and Git-based CI/CD workflows. ✅ Implemented workflow orchestration and business process automation using Camunda BPM. AI-Assisted Development: I effectively leverage AI tools such as ChatGPT and GitHub Copilot to accelerate development productivity by 60–80% through: • Business rule analysis and API design • Schema and ORM modeling • Rapid endpoint generation • Code completion and refactoring • Automated code reviews and quality improvements • Technical documentation generation Core Technologies: • Java, Spring Boot, Spring Framework, Spring Cloud, Hibernate, JPA, Camunda, GraphQL, WebSockets • Kafka, RabbitMQ, Redis, Docker, Kubernetes • MySQL, Oracle, PostgreSQL, MongoDB, Elasticsearch • AWS (EC2, ECS, RDS, S3, IAM, SQS) • OAuth2, JWT, Keycloak, LDAP, Okta, Spring Security • React, Angular, TypeScript, JavaScript • Jenkins, Git, Maven, SonarQube, Jira I am passionate about building reliable, scalable, and secure enterprise solutions that deliver measurable business value. Let's discuss how I can help your team accelerate development, modernize architecture, and successfully deliver high-quality software solutions.

Hi there! I'm a Computer Science graduate with over 9 years of hands-on experience building software that actually works — cleanly written, well-tested, and delivered on time. I've worked with clients across Upwork and Elance on a wide range of projects, from web applications and backend systems to mobile apps and database-driven solutions. Whether you need a full product built from scratch or a tricky bug squashed, I bring the same level of care and attention to every task. A few things that set me apart: * I'm a competitive programmer — I've solved 420+ problems on UVA Online Judge and participated in ICPC contests (2012, 2013, 2014). This means I don't just write code; I think through problems carefully before I write a single line. * I'm available 24/7 and communicate clearly throughout a project, so you're never left wondering where things stand. * Every project comes with 14 days of free post-delivery support, because I care about the outcome, not just the handoff. What I can help you with: *Backend & API development (Java, Spring Boot, Spring Webflux) *Web design & development (HTML, CSS, JavaScript, JSP) *Android app development *Database design & management (MySQL, Oracle, SQLite) *Reporting & templates (Jasper iReport) *Bug fixing, code review, and optimization I take pride in writing clean, maintainable code and keeping my clients in the loop every step of the way. If you have a project in mind — big or small — I'd love to hear about it. Let's build something great together.

Java & Spring Boot Architect | AI-Powered Backend Systems | 14+ Years Experience I am a Java & Spring Boot architect with 14+ years of hands-on experience building production-grade enterprise systems — from core banking platforms to AI-integrated microservices. I hold a BSc in Computer Science & Technology and now work as a dedicated full-time freelancer on Upwork, bringing the same rigour I applied in large fintech institutions directly to client projects. My core expertise spans Spring Boot, Spring Framework, and microservices architecture, with deep practical knowledge of SSO & Keycloak, Docker, DevOps pipelines, and GitLab CI/CD. I design systems that are secure, observable, and built to scale — whether that means integrating Kafka for event-driven flows, Flowable BPMN for workflow automation, or AWS for cloud infrastructure. Over the past year I have been heavily invested in the AI/LLM frontier: building Spring AI applications, wiring up MCP (Model Context Protocol) servers, running local models via Ollama, and implementing advanced patterns like tool calling, RAG pipelines, and AI agent workflows. I see AI not as a separate layer but as a first-class citizen inside enterprise Java backends. If you need someone who understands both the old-school reliability of enterprise Java and the new possibilities of AI-augmented architecture — let's talk. CORE STACK: Java · Spring Boot · Spring Framework · Microservices · REST API · Keycloak/SSO · Docker · GitLab CI/CD · DevOps · Kafka · Flowable BPMN · Oracle · PostgreSQL · AWS · Angular AI & EMERGING TECH: Spring AI · MCP · Ollama · Tool Calling · AI Agents · RAG Pipelines · pgvector · LLM Integration · OpenAI API · Prompt Engineering DOMAINS: Banking & Fintech · SWIFT/ISO 8583 · AML/CFT Compliance · NPSB/RTGS · ATM Switch · eKYC · Healthcare/EMR · Document Management

🏆 Upwork Top Rated Plus Developer 🏆 6+ years of experience in Java, Spring Boot, Kotlin, Python, Android 🏆 14,000+ Hours in Hourly Projects and more in Fixed Cost Projects 🏆 30+ Enterprise web applications deployed on cloud services 🏆 100+ Small POC applications delivered 🏆 100% Client Satisfaction & consistent best-quality delivery 🏆 Worked in FinTech, E-commerce, CRM, Cloud Integration, ETL, and Web API Integration 🏆 Self-motivated, detailed-oriented, punctual, and a fast learner 🏆 Strong troubleshooting/debugging skills 🏆 Help turn idea/concept into reality My expertise includes the following: ✔ Java Language and Frameworks: Java, Spring Boot, Spring Framework, JPA, Hibernate, Kotlin, Maven, Jetty ✔ Other Languages and Frameworks: JavaScript, Node, TypeScript, Python, Go ✔ Android SDK, React, Flutter, BT LE device integration, performance improvement ✔ SQL, NoSQL Databases: PostgreSQL, MySQL, Oracle, MongoDB, Redis ✔ IOT, AR/VR, Machine Learning ✔ REST API, GraphQL, Web Service, XML, JSON, HTML5, Reactjs, Bootstrap ✔ Cloud services like AWS, Google Cloud Platform, Azure, Heroku, Firebase ✔ Social Media Integration like Facebook, Twitter, and Linkedin ✔ Payment Gateway Stripe, Braintree, Paypal, Autorize.Net, Square ✔ Familiar with Asana, Basecamp, Git, SVN, Jira, Trello, Slack

I help businesses stabilize, scale, and extend existing applications without costly rewrites. With 15+ years of experience, I specialize in Java (Spring Boot) and Laravel-based systems, focusing on bug fixing, performance optimization, API development, and long-term maintenance for SaaS and enterprise applications. If your application is slow, unstable, hard to maintain, or needs new features added safely — I can help. What Can I Help You With - Fixing critical bugs and production issues - Improving performance and database efficiency - REST API development and third-party integrations - Refactoring legacy Java / PHP applications - Secure authentication and role-based access - Ongoing maintenance and technical support Why Clients Trust Me - 15+ years building and maintaining real-world systems - $70K+ earned and 5,000+ hours on Upwork - Long-term contracts (1,000+ hours) with US & UK clients - Strong focus on clean, maintainable, and scalable code Technical Stack - Backend: Java, Spring Boot, Spring Security, Hibernate, JPA, PHP, Laravel - Frontend: Angular, React - Databases: MySQL, SQL Server - Tools: REST APIs, JUnit, Mockito, Git