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🚀 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.

Backend & API Integrations Engineer — Java/Spring Boot, Node.js/NestJS, and the third-party integrations most teams don't want to touch (QuickBooks, Xero, payments, accounting). I build and stabilize reliable backends: clean REST APIs, microservices, and integrations that actually stay in sync. 8+ years of backend experience and 2,700+ hours delivering systems that handle high traffic and financial/inventory workflows. Where I help most: - API & platform integrations — QuickBooks Online & Xero (OAuth2, tokens, webhooks, sync, reconciliation), cXML purchase-order flows, and payment/accounting platforms - Microservices — designed and maintained 32+ services with CI/CD + Docker, improving uptime and cutting deployment time - Backend rebuilds — refactored legacy systems into scalable services with measurably higher throughput - Security — JWT, Spring Security, and Auth0 authentication/authorization - Reliability — async processing with Kafka/SQS, idempotency, retries, and rate limiting, backed by tests (JUnit, Mockito, Testcontainers) Tech I work with: Java, Spring Boot, Node.js, NestJS, Python, PostgreSQL, MySQL, MongoDB, MariaDB, Redis, DynamoDB, Docker, Apache Kafka, AWS SQS, REST, gRPC. How I work: I start with a short review of your current code/architecture, then give you a clear plan, timeline, and checkpoints — so you always know what's happening and what comes next. If you're dealing with a fragile backend, a stalled integration, or you need a new API built right the first time, send me a message describing what you're trying to achieve and I'll reply with a concrete next step. — Samson

⚡ Backend systems should not become fragile over time; they must stay maintainable, scalable, and reliable as products grow. I am a Backend Engineer specializing in Java, Kotlin, and Spring Boot, focused on building production-grade systems where clean architecture, long-term maintainability, and stability are critical. I combine strong backend engineering practices with practical system design to create APIs and services that remain easy to extend, debug, and operate in real-world environments. Clients work with me when system quality, clean code, and scalable backend architecture matter, not just feature delivery. 🏆 Proven Engineering Approach ✔ Clean, maintainable backend architecture ✔ Production-focused development mindset ✔ Long-term scalability and reliability focus ✔ Clear communication and structured collaboration 🚀 Core Capabilities ☕ Backend Engineering with Java & Kotlin • Spring Boot application development • REST API design & implementation • Business logic architecture • Secure and maintainable backend systems • Performance-focused backend development 🏗 Scalable System Architecture • Microservice-based architectures • Modular and maintainable code structure • Service communication patterns • Production-ready backend design • Reliability and scalability optimization 🗄 Database & Persistence Engineering • PostgreSQL, MySQL, MongoDB • Hibernate / JPA / Spring Data JPA • Query optimization & data modeling • Relational and NoSQL database design ⚙ Development & DevOps Workflow • Docker-based environments • Git-based development workflows • Unit & integration testing • CI/CD-friendly project structures 🔍 Engineering Focus 🏢 Enterprise & Business Platforms Scalable APIs • backend services • maintainable systems 🚀 Startup Products & SaaS Platforms Fast iteration • clean architecture • long-term scalability 💡 Engineering Mindset • Architecture-first thinking • Clean and understandable code • Simplicity over over-engineering • Production reliability focus • Ownership from development to deployment • Long-term maintainability mindset 🧰 Technical Stack Java • Kotlin Spring Boot • Spring MVC • Spring Data JPA REST APIs • Microservices PostgreSQL • MySQL • MongoDB Hibernate • JPA Docker • Git ✨ Why Clients Choose Me ⭐ Clean and maintainable backend architecture ⭐ Scalable production-ready systems ⭐ Strong Java & Kotlin expertise ⭐ Clear communication & accountability ⭐ Reliable engineering mindset 🚀 Ready to Build Stable, Scalable Backend Systems? If you need a backend engineer who cares about clean architecture, maintainable systems, and production reliability, I am ready to help. Let us build backend systems that stay reliable, scalable, and easy to maintain long after launch.

🚀 I build scalable backend systems and full-stack applications for SaaS platforms, startups, and enterprises — with 5+ years shipping production Java / Spring Boot systems, and hands-on MERN stack experience when projects call for a JavaScript-based full-stack build. I currently work as a Senior Software Engineer on Xcelerate, a microservices-based SaaS platform for restoration companies, where I develop and maintain 20+ Spring Boot microservices, build real-time messaging systems, and integrate third-party platforms like QuickBooks, RingCentral, Zapier, and Encircle. What I can help you build: ✔ Java & Spring Boot backend systems ✔ Microservices architecture & REST APIs ✔ MERN stack applications (MongoDB, Express, React, Node.js) ✔ Third-party integrations (QuickBooks, Stripe, Twilio, Zapier, RingCentral) ✔ Cloud deployments — AWS, Azure, GCP ✔ CI/CD pipelines (Jenkins, GitHub Actions), Docker ✔ Database design & query optimization (PostgreSQL, MySQL, MongoDB) ✔ Legacy system modernization (Java 8 → Java 21 migrations) Highlights: Led backend development across 20+ microservices for Xcelerate, a live SaaS platform for restoration companies Migrated infrastructure from VMs to Azure App Services, implementing Azure Front Door for traffic routing and load balancing Built WS Glam, a full-stack e-commerce platform from scratch — frontend, backend, admin panel, payment integration, and role-based access control Integrated Stripe subscription billing for Remojo and overhauled its backend architecture for scale Built a custom AML (Anti-Money Laundering) system from scratch, including case management tools and fraud detection workflows I think in terms of failure modes before I write code — what happens when a webhook fires twice, when an API rate-limits mid-sync, when a migration needs to run without downtime. I communicate proactively and hand off production-ready code with documentation to match. Let's talk about what you're building — I'll give you a straight technical assessment and a clear path forward.

Lead Back-End Engineer | Java + Spring | Building scalable, secure, and investor-ready products For 9+ years, I’ve been helping startups and growing businesses build reliable, fast, and maintainable back-ends that actually support scale — not just run. 💡 What you get working with me: Architecture that lasts: I design solutions that stay clean and efficient even as your product grows. Speed and clarity: Delivering results fast — with clear documentation and full transparency. Cross-domain expertise: Healthcare, E-Commerce, IoT, CRM, E-Learning. I understand business logic, not just code. AI & ML integration: GPT-based and ML-driven systems for smarter automation. Tech stack: Java, Spring (Boot, Security, Data, Batch), Hibernate, PostgreSQL, MongoDB, Redis, Elasticsearch, RabbitMQ, Docker, Jenkins, Linux, GitLab CI/CD. ✅ Bonus: I write clean, test-covered code (JUnit, Selenium) and handle deployment — from staging to production. Let’s turn your concept into a fast, stable, and scalable system. 📩 Message me to discuss your current challenge — I’ll help you find the smartest solution.

Hi! I’m Rashu, an Expert Java Back-End Developer. Are you looking for a reliable, detail-oriented back-end developer who delivers high-quality, scalable, and secure solutions? With over 5+ years of hands-on experience in Java-based backend development, I specialize in building powerful server-side applications that drive performance and growth. 🔧 Technical Skills & Tools: 🖥 Backend Development - Java, Spring Boot, Hibernate, JUnit, RESTful APIs & Microservices Architecture ☁ Cloud & DevOps - AWS (EC2, S3, RDS) 💾 Databases & Version Control - SQL, MySQL, PostgreSQL Git, Bitbucket 🏥 Domain Experience: *Healthcare: Developed a complete Hospital Management ERP Software used for streamlining patient records, billing, pharmacy, and more. Banking: Worked on secure, transaction-heavy systems with robust authentication and compliance. *Voice Testing Applications: Built reliable and performance-oriented back-end components for voice-based testing platforms. ✅ Why Work With Me: *100% commitment to client satisfaction *Known for being detail-oriented, reliable, and deadline-driven *Clean, maintainable code with proper testing using JUnit *Strong communication skills and proactive problem-solving 📩 Let’s Get Started! Let’s build something great together. I’m here to bring your project to life with efficiency and precision. Send me a message and let’s talk about how I can help! **This is not a company or agency account. Only the profile name is of my firm's name but I am an Independent Freelancer and all the information is about me only.