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Hi, I'm Arya - a Senior Software Engineer with 5+ years building scalable backend systems for fintech, e-commerce, and enterprise platforms. I specialize in high-performance APIs, microservices architecture, and complex third-party integrations. What I deliver: ✅ High-scale backend systems: Architected systems handling 400-600 RPS with 99.9% uptime ✅ Complex integrations: UK HMRC Making Tax Digital, payment gateways, e-commerce platforms ✅ Performance optimization: 50-60% database latency reduction through query optimization ✅ Revenue-driving features: Built product integrations generating 100+ billion IDR monthly revenue Recent client work: UK Tax Integration - Implemented HMRC Making Tax Digital (MTD) ITSA integration for an accounting system, enabling automated tax reporting for self-employment and UK property businesses Dubai Media Platform - Developed backend for a directory-style app featuring local activities, magazine content, and gamification systems Database Optimization - Achieved 50-60% latency reduction on MariaDB/AWS RDS for a Symfony application through Doctrine query optimization Indonesian E-commerce - Led pay-later system integrations with Tokopedia, Shopee, TikTok Shop, Lazada, and Traveloka Core expertise: Backend: Java (Spring Boot), NodeJS, PHP (Laravel/Lumen/Symfony), REST APIs, microservices Databases: MySQL, PostgreSQL, MariaDB - query optimization & schema design Cloud & DevOps: AWS, GCP, Kubernetes, Docker, CI/CD pipelines Integration: Government APIs (HMRC), payment systems, e-commerce platforms Why clients choose me: Proven at scale: 5+ years at Indonesia's leading fintech (part of Djarum Group) International experience: UK, UAE, and Southeast Asian clients Complete delivery: Clean code, tests, documentation, deployment guidance Reliable communication: GMT+7 based, professional English, regular updates Industries: Fintech, E-commerce, Government/Tax, Media & Entertainment, SaaS Ready to build reliable, scalable backend solutions for your business. Let's discuss your project requirements.

With 15+ years of experience in extensive list of technologies, I am able to provide you with high quality, sophisticated, robust solutions that are well tested, efficient, accurate. I shine at diving into your existing codebase, find the source of issues, and resolve them without breaking another thing. If you have old legacy code, or a vibe coded program that is not working, I can fix them up for you to clean and conscious code. Need to automate? Got your back. Data processing, parsing complex PDF? Sure thing! You need it, if there is solution for it, I can get it done. Technologies I am currently working with: Rust, Python, Axum, SQLAlchemy, FastAPI, Django, PostgreSQL, SQLite, HTMX, ReactJS, Tailwindcss, RunPod, AI/LLM, Svelte I am a passionate software engineer who enjoys challenges, and finding solutions. I have extensive experience of diving into existing code, finding issues, and resolve them. As a hardworking, resourceful engineer who also loves automating things, that usually saves a lot of time, I can provide the best service for the most reasonable costing. Besides developing data mining applications, automation tools, Websites, I have personal interest in Open Source projects. Here's a list of, but not limited to, responsibilities I have successfully fulfilled: ◾️ Desktop application ◾️ Refactoring ◾️ Prompt Engineering (Local LLM) ◾️ Machine Learning ◾️ Web development ◾️ Web Scrapers ◾️ Email processing ◾️ Distributed applications ◾️ ETL ◾️ Automation ◾️ Server configuration and deployments ◾️ Bug fixing and code improvements ◾️ High Performance computing Let's get in touch.

If you’re looking for a Java engineer who builds production-ready systems—not just code, you’re in the right place. I’m a Software Engineer with strong expertise in Java-based full-stack development, specializing in Spring Boot, Hibernate, and Microservices architecture. I help businesses design, develop, and deploy scalable, secure, and high-performance applications that work reliably in real-world environments. HOW I HELP CLIENTS ✅ Build Java-based backend systems and RESTful APIs ✅ Design scalable microservices architectures ✅ Develop database-driven applications with clean data models ✅ Optimize performance, reliability, and maintainability ✅ Containerize and deploy applications using Docker and CI/CD pipelines ✅ Integrate AI-driven features such as Speech-to-Text (STT) and Text-to-Speech (TTS) JAVA-FOCUSED TECHNICAL EXPERTISE Backend & Application Development: • Java, Core Java, OOP • Spring Framework, Spring Boot, Hibernate, JPA • RESTful APIs, MVC Architecture • Microservices design • Swagger for API documentation Databases: • MySQL, MongoDB, Oracle, Oracle RAC, etc. • SQL optimization and high-availability systems • Apache Kafka for messaging and event-driven systems DevOps & Cloud: • Docker, Jenkins, GitHub Actions • CI/CD pipelines, AWS, Linux • Tomcat, NGINX • Monitoring: Prometheus, Grafana Additional Skills: • Node.js, PHP, Python (API development, automation), etc. • AI & NLP integrations • Speech-to-Text (STT) & Text-to-Speech (TTS) • Frontend: HTML, CSS, JavaScript, JSP, Bootstrap, etc. Methodologies & Soft Skills: • Agile / Scrum workflows • Strong problem-solving skills and attention to detail WHY CLIENTS CHOOSE ME ✅ Strong experience with production-grade Java systems ✅ End-to-end ownership from development to deployment and support ✅ Clean, maintainable, and efficient code ✅ DevOps-aware, production-focused mindset ✅ Clear communication and dependable delivery ✅ Quick understanding of existing Java codebases I don’t over-engineer solutions — I build practical Java systems that scale and last. LET’S WORK TOGETHER If you need a Java / Spring Boot / Microservices engineer with Docker, AWS, and real production experience, I’d be happy to help. 📩 Send me a message with your requirements, and let’s build something reliable.

I'm a Full-Stack Java Developer with over 8+ years of industry experience. I excel in all aspects of Java application development, from design and development to deployment. I have a proven track record of building robust and Scalable applications across diverse domains. My Expertise Full-Stack Development: Java: Core Java, multithreading, OOP, Spring, Hibernate, Struts, J2EE. Frameworks & Libraries: Spring, Hibernate, JavaFX, Apache Struts. Microservices Architecture: Spring Cloud, Netflix OSS, service discovery, load balancing, tolerance mechanisms. Web Development: JSP, Servlets, RESTful APIs, Angular, React, HTML, CSS, JavaScript. Databases: MySQL, PostgreSQL, MongoDB, Redis. Testing & Debugging: JUnit, Mockito. I also use GitHub Copilot and Claude Code to deliver the best solutions. ✔ LLM integrations (OpenAI, Claude, etc.) ✔ AI-assisted workflow automation ✔ Prompt engineering & optimization ✔ RAG based enterprise search solutions ✔ AI code acceleration using tools like Cursor ✔ Designing AI-ready Microservices architecture Java Solution Architect: Designing scalable solutions with Java, Spring, Hibernate, and microservices. DevOps: Cloud setup, infrastructure management, CI/CD. Proficient in AWS (Lambda, EC2, S3, Redshift, SageMaker, Cognito) and GCP (VMs, Google cloud storage). Domain Experience: Insurance, finance, healthcare, e-learning, e-commerce, travel, real estate, logistics, supply chain, social networking, and education. CRM and ERP systems.

🏆 Top Rated Plus | 14,000+ Hours | 100% Job Success Score | 5★ Feedback 💼 12+ years of Experience | Java · Spring Boot · AWS · DevOps · AI Integration 🚀 FinTech · Banking · Enterprise SaaS · Cloud-Native Systems Over the past 12+ years I have been building production-grade Java backends, scalable cloud infrastructure, and enterprise systems for FinTech, banking, healthcare, and SaaS businesses. Over the last two years I have been helping businesses integrate Generative AI, LLMs, RAG pipelines, and AI workflow automation into production backend systems. I specialize in Java, Spring Boot, Microservices, AWS, PostgreSQL, MongoDB, Docker, Kubernetes, and AI integrations using Claude API, OpenAI, and LangChain - helping companies build reliable, scalable, and production-ready systems that go beyond demos and actually work under real load. 𝐖𝐡𝐚𝐭 𝐈 𝐒𝐡𝐢𝐩 ✔ Production-grade Java backends: Spring Boot, Spring Security, microservices, event-driven systems ✔ Scalable cloud infrastructure: AWS (EC2, ECS/EKS, RDS, Lambda), Kubernetes, zero-downtime deployments ✔ End-to-end DevOps: CI/CD pipelines, Terraform IaC, Docker containerization, GitOps ✔ AI-powered backend features: LLM integrations, RAG pipelines, AI agents, workflow automation ✔ Database design and optimization: PostgreSQL, MySQL, MongoDB, Redis, caching strategies ✔ Full-stack delivery: React/Vue3 frontend integration, REST API design, OAuth2/JWT security 𝐓𝐞𝐜𝐡𝐧𝐢𝐜𝐚𝐥 𝐄𝐱𝐩𝐞𝐫𝐭𝐢𝐬𝐞 𝟭. 𝐉𝐚𝐯𝐚 𝐁𝐚𝐜𝐤𝐞𝐧𝐝 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐦𝐞𝐧𝐭 Java 17/21, Spring Boot, Spring Security, Spring Cloud, Spring MVC, Hibernate, Quarkus Microservices architecture, event-driven systems (Kafka, RabbitMQ), REST APIs JWT/OAuth2/RBAC security, API Gateway design, multi-tenant SaaS architecture Legacy modernization, Java 8 → 17/21 migrations, codebase refactoring 𝟮. 𝐂𝐥𝐨𝐮𝐝 & 𝐃𝐞𝐯𝐎𝐩𝐬 AWS (EC2, ECS/EKS, RDS, S3, Lambda, IAM, CloudWatch, Route53, ALB) Kubernetes, Helm, ArgoCD - cluster management, autoscaling, zero-downtime deployments Docker, multi-stage builds, container registry management Terraform, CloudFormation - Infrastructure as Code CI/CD: GitHub Actions, Jenkins, GitLab CI/CD, Azure DevOps 𝟯. 𝐃𝐚𝐭𝐚𝐛𝐚𝐬𝐞 & 𝐃𝐚𝐭𝐚 PostgreSQL, MySQL, Oracle, MongoDB, Redis Advanced query optimization, schema design, replication, caching strategies JPA/Hibernate ORM, connection pool tuning, performance tuning under production load 𝟰. 𝐀𝐈 & 𝐆𝐞𝐧𝐞𝐫𝐚𝐭𝐢𝐯𝐞 𝐀𝐈 𝐈𝐧𝐭𝐞𝐠𝐫𝐚𝐭𝐢𝐨𝐧 ✔ LLM API Integration -- Anthropic Claude, OpenAI for production backend features ✔ RAG (Retrieval-Augmented Generation) pipelines -- document intelligence, intelligent search ✔ LangChain -- AI-driven workflow automation and conversational backends ✔ AI Agents & Agentic Workflows ✔ AI Chatbot Development ✔ Prompt Engineering & LLM Optimization ✔ n8n Workflow Automation -- connecting AI services and business systems ✔ AI-assisted development -- Cursor AI, Claude Code, GitHub Copilot daily workflow 𝟱. 𝐒𝐞𝐜𝐮𝐫𝐢𝐭𝐲 & 𝐂𝐨𝐦𝐩𝐥𝐢𝐚𝐧𝐜𝐞 Spring Security, OAuth2, JWT, RBAC across regulated FinTech and healthcare environments HIPAA-compliant system design, secure API architecture, data encryption Audit logging, access control, compliance-grade transaction handling 𝟲. 𝐌𝐨𝐛𝐢𝐥𝐞 & 𝐅𝐮𝐥𝐥-𝐒𝐭𝐚𝐜𝐤 Android development — Java, Kotlin, Android SDK React, Vue3 frontend integration for full-stack delivery 𝐒𝐞𝐜𝐭𝐨𝐫𝐬 𝐈'𝐯𝐞 𝐁𝐮𝐢𝐥𝐭 𝐅𝐨𝐫 • FinTech & Banking: Core banking systems, payment platforms, lending administration, regulatory compliance • Healthcare: HIPAA-compliant microservices, healthcare platform modernization • E-Commerce: Scalable backends, payment gateway integration, inventory systems • Enterprise SaaS: Multi-tenant platforms, workflow automation, API-first architecture • AI Products: RAG systems, LLM-powered backends, intelligent automation pipelines 𝐖𝐡𝐚𝐭 𝐈'𝐯𝐞 𝐁𝐮𝐢𝐥𝐭 • Royal Caribbean International -- Java, Spring Boot, PostgreSQL, RESTful APIs at enterprise scale • FOCUS (National Banking Platform) -- Hibernate, Spring MVC, JasperReports, nationwide loan administration • KredX -- multi-tenant financial trading platform, approval workflows, asset classes • GAP -- e-commerce backend, React, MySQL, Redis, payment gateway integration 𝐑𝐞𝐜𝐞𝐧𝐭 𝐄𝐧𝐠𝐚𝐠𝐞𝐦𝐞𝐧𝐭𝐬 • AI/ML Infrastructure (Active) -- GPU workloads, MLOps pipelines, AWS, real-time AI deployment • Event-Driven Banking Platform ⭐ 5.0 -- Java, Quarkus, async event processing, production FinTech • Java 8 → 11 Migration ⭐ 5.0 -- legacy modernization, long-term enterprise engagement 🚀 Whether you need a Senior Java engineer, a DevOps partner, or someone who can integrate AI into your backend and keep it running in production -- I'm the one who covers all three. 📩 Send me a message. Let's build it right.

Results-driven system developer with more than 10 years of development experience using java. Having a strong technical background who possesses self-discipline and the ability to work with the minimum of supervision. Able to play a key role throughout the software development / support life cycle of a project to ensure the quality solutions meet business objectives. Also highly accomplished with a verifiable track record in fields such as analysis and gathering, business process mapping and the development of interactive prototypes.