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Need a Java backend that survives real traffic, not just passes a demo? I build production-grade APIs and microservices with Spring Boot, then layer AI agents on top that reason over your live data instead of guessing. Most backend developers stop at CRUD endpoints. I go further: solving distributed-systems problems like race conditions, multi-instance coordination, and rate limiting, then extending those systems with AI tool-calling agents that answer real questions about live system state. My recent rate limiter project (Java, Spring Boot, Redis) was verified with concurrent load testing and deployed live on AWS behind a load balancer across multiple instances. Here's what I can build for you: - Production-ready REST APIs and microservices in Java/Spring Boot or Node.js/Express - AI agents and chatbots that operate on your real data via tool-calling, not static prompts - Scalable backend architecture for SaaS products - Distributed-systems fixes: rate limiting, caching, concurrency, atomic operations - Performance tuning for slow APIs, database queries, and N+1 issues - AWS deployment with Docker and Kubernetes, plus production debugging 5-star rating from every completed contract so far, with hands-on experience integrating Elasticsearch into Spring Boot microservices to search 500,000+ records (cutting response times by 50%) and implementing OAuth 2.0 and TLS security. Backed by a Java Programming Masterclass certification and an Accenture engineering job simulation. Available now, with an average response time under 4 hours. Send me a message and let's talk about what you're building.

Are you finding Frontend Developer to convert your design to Website UI or a Backend Developer who is able to build website from your requirements and as well as implementing various functionality as you requested, finish your requirements in a short time, write highly optimized and reusable code? You have come to the right place. My core technologies are Java Spring Boot and ReactJS. I may not be one of the best developers in my field, but I will be the only person who is willing to do this for you: ◾Willing to spend more time researching about your requirements to create the best product. ◾Take communication as priority to have the best understanding about your requirements. If anything is unclear, I will try to ask to avoid misunderstandings between us. ◾Always passionate with the job, always spending extra time to finish the task is also one of my hobbies (Since you are happy with my products, I will be happy too) ◾Always trying to optimize as well as write reusable code to make the website as quality as possible (Of course with my skill I cannot make it smooth like the top programmers, but I will try my best) ◾Familiar with lots of library and extensions to make the website look more attract. (By using animations) ◾Carefully responsive on many screen sizes and devices to help you reach with more customers. Also, I'm using SSR so the SEO of the website will be enhanced. Unlike other developers who prioritize speed and monetary gain, I approach my work with genuine passion and commitment, striving to deliver the best possible product for you. My focus is not just on finishing quickly, but on pouring my heart into the development process to ensure exceptional results that meet your unique needs. I have obtained an IELTS score of 6.5, which reflects my abilities in reading, writing, speaking, and listening in English. I am confident in my skills across all these areas. Through the period at my previous company, I successfully contributed to generating $100000 in revenue from client projects originating from Europe, Taiwan, Australia, and Vietnam. If given the opportunity to work with you, I envision a bright and promising future ahead. Together, we can achieve remarkable results and create a successful partnership. By leveraging my skills, experience, and dedication, I am confident in our ability to not only meet but exceed your expectations. I look forward to collaborating with you to accomplish outstanding outcomes and unlock new opportunities for mutual growth and prosperity. Please contact me if you find interesting about my services.

𝗝𝗮𝘃𝗮 𝗕𝗮𝗰𝗸𝗲𝗻𝗱 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗺𝗲𝗻𝘁 🖥️, 𝗦𝗽𝗿𝗶𝗻𝗴 𝗕𝗼𝗼𝘁 🌱, 𝗠𝗶𝗰𝗿𝗼𝘀𝗲𝗿𝘃𝗶𝗰𝗲𝘀 🛠️, 𝗔𝗪𝗦 ☁️, 𝗥𝗘𝗦𝗧 𝗔𝗣𝗜𝘀 🔗 I help businesses build scalable, secure, and high performance backend systems that handle growth without slowing down. Most applications work well in the beginning. The problems start when traffic increases. APIs become slow, deployments become risky, and maintaining the code becomes expensive. That's where I come in. 𝗔𝘀 𝗮 𝗦𝗲𝗻𝗶𝗼𝗿 𝗝𝗮𝘃𝗮 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗲𝗿 𝘄𝗶𝘁𝗵 𝟭𝟯+ 𝘆𝗲𝗮𝗿𝘀 𝗼𝗳 𝗲𝘅𝗽𝗲𝗿𝗶𝗲𝗻𝗰𝗲, I've helped startups and enterprise companies design, build, and optimize backend systems that scale reliably in production. I am not just a Java Developer who writes code. I help businesses create backend architectures that support growth, improve performance, and reduce technical debt. 𝗥𝗲𝘀𝘂𝗹𝘁𝘀 𝗜'𝘃𝗲 𝗗𝗲𝗹𝗶𝘃𝗲𝗿𝗲𝗱 • Built scalable Java Developer solutions serving thousands of daily users with high availability. • Designed Microservices architectures that reduced deployment risks and improved system reliability. • Developed Spring Boot applications that improved API response times and backend performance. • Helped businesses migrate legacy systems into modern Java Developer architectures. • Delivered production ready backend platforms for startups and enterprise organizations. Every project starts with a business goal and ends with measurable results. 𝗪𝗵𝗮𝘁 𝗜 𝗗𝗼 𝗝𝗮𝘃𝗮 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗺𝗲𝗻𝘁 • Custom backend application development • Enterprise Java solutions • Legacy application modernization • Backend performance optimization • Secure and maintainable architecture 𝗦𝗽𝗿𝗶𝗻𝗴 𝗕𝗼𝗼𝘁 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗺𝗲𝗻𝘁 • REST API development • Spring Security • Spring Data JPA • Authentication and authorization • Scalable backend services 𝗠𝗶𝗰𝗿𝗼𝘀𝗲𝗿𝘃𝗶𝗰𝗲𝘀 𝗔𝗿𝗰𝗵𝗶𝘁𝗲𝗰𝘁𝘂𝗿𝗲 • Distributed systems design • Service decomposition • API Gateway implementation • Event driven architecture • System scalability and resilience 𝗔𝗪𝗦 𝗖𝗹𝗼𝘂𝗱 𝗦𝗼𝗹𝘂𝘁𝗶𝗼𝗻𝘀 • AWS deployment and infrastructure • EC2, ECS, Lambda • Cloud architecture design • Monitoring and optimization • Cost effective cloud operations 𝗥𝗘𝗦𝗧 𝗔𝗣𝗜 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗺𝗲𝗻𝘁 • API design and implementation • Third party integrations • Payment gateway integration • Documentation and testing • Secure API architecture 𝗪𝗵𝗮𝘁 𝗠𝗮𝗸𝗲𝘀 𝗠𝗲 𝗗𝗶𝗳𝗳𝗲𝗿𝗲𝗻𝘁 Most Java Developers focus only on writing code. I focus on the business impact of the software. 𝗕𝗲𝗳𝗼𝗿𝗲 𝗯𝘂𝗶𝗹𝗱𝗶𝗻𝗴 𝗮𝗻𝘆𝘁𝗵𝗶𝗻𝗴, 𝗜 𝗮𝘀𝗸: • Will this architecture still work when traffic grows? • Can future developers maintain it easily? • Is it secure? • Is it optimized for performance? • Can it scale without major rewrites? This approach helps clients avoid costly problems later. 𝗪𝗵𝗼 𝗜 𝗪𝗼𝗿𝗸 𝗕𝗲𝘀𝘁 𝗪𝗶𝘁𝗵 • Startups building new SaaS products • Businesses scaling existing applications • Companies modernizing legacy Java systems • Teams adopting Microservices architecture • Organizations migrating workloads to AWS • Businesses needing secure and scalable REST APIs 𝗧𝗲𝗰𝗵𝗻𝗼𝗹𝗼𝗴𝗶𝗲𝘀 Java, Spring Boot, Spring Security, Hibernate, JPA, Microservices, AWS, Docker, Kubernetes, REST APIs, Kafka, RabbitMQ, PostgreSQL, MySQL, MongoDB, Redis, Maven, Gradle, Git, CI/CD, Jenkins 𝗪𝗵𝘆 𝗖𝗹𝗶𝗲𝗻𝘁𝘀 𝗛𝗶𝗿𝗲 𝗠𝗲 • 13+ years of Java Developer experience • Clean, maintainable code • Scalable backend architecture • Strong communication • Reliable delivery • Long term technical thinking If you're looking for a Java Developer who understands both software engineering and business objectives, let's discuss your project. Send an invitation and I'll respond within a few hours. Keywords: Java Developer, Senior Java Developer, Java Backend Developer, Java Software Engineer, Spring Boot Developer, Spring Boot Expert, Java Application Development, Enterprise Java Developer, Java Web Services, REST API Developer, RESTful API Development, Backend Developer, Backend Engineer, Microservices Developer, Microservices Architecture, Distributed Systems, AWS Developer, AWS Cloud Engineer, Java AWS Developer, Docker, Kubernetes, Kafka, RabbitMQ, Hibernate, JPA, Spring Security, API Integration, Database Design, PostgreSQL, MySQL, MongoDB, Redis, SaaS Backend Development, Scalable Application Development, Cloud Native Applications, Java Consultant, Software Architecture, System Design, Enterprise Application Development, Performance Optimization, CI/CD, Jenkins, Maven, Gradle, Full Stack Java Developer.

AVAILABLE FOR URGENT PROJECTS OR BUG FIXES I'm a Java developer with 8+ years delivering production-grade systems from serverless AWS architectures to distributed microservices serving healthcare and fintech clients. 𝗪𝗵𝗮𝘁 𝗜'𝘃𝗲 𝗕𝘂𝗶𝗹𝘁 ➡ As lead Java developer at my current company, managed a team of 8 engineers over 7 years — delivering 4 production systems across healthcare, fintech, and AI verticals. ➡ Designed serverless AWS infrastructure for a US longevity and healthcare platform as an AWS developer — Lambda, AppSync, DynamoDB, Cognito, SNS/SQS, Stripe, HubSpot currently in production. ➡ Led migration from monolithic Spring apps to distributed microservices — reducing deployment complexity and enabling independent scaling per service. ➡ Built a PDF/UA accessibility compliance platform as backend developer using Java 21, iText 7, PDFBox, veraPDF processing and remediating documents of hundreds of pages against international accessibility standards. ➡ Delivered an AI-powered workflow automation platform as an AI developer integrating Spring AI, Azure cloud, and automated Stripe subscription workflows. ➡ Shipped a medical practitioner dashboard integrating 3rd-party hardware APIs and clinical toolkits as backend developer and tech lead serving real patients and practitioners in production. Core experience as a Java developer and Backend developer As a Java developer with 8+ years in production systems, my core is Java 8 through Java 21 with the full Spring ecosystem Boot, Cloud, Security, WebFlux, Batch, and Spring AI for AI-integrated backends. I work across both relational (PostgreSQL, MySQL) and NoSQL (MongoDB, DynamoDB, Redis) databases, selecting the right store based on access patterns not habit. As a backend developer I've optimised slow MongoDB queries to cut response times, redesigned DynamoDB access patterns for a high-throughput healthcare API, and built Redis caching layers that kept latency flat under load. As an AWS developer, my hands-on stack covers Lambda, AppSync, DynamoDB, Cognito, SQS, SNS, SES, S3, API Gateway, Route 53, and CloudFormation built and maintained in a live US healthcare platform. I design serverless pipelines end-to-end, not just deploy to them. For async workloads I wire event-driven systems using Kafka, RabbitMQ, or AWS SNS/SQS depending on durability and throughput requirements. On the container side: Docker, Kubernetes, Helm, OpenShift, Terraform, and Jenkins full IaC from infrastructure definition to CI/CD pipeline. As an AI developer, I've shipped Spring AI integrations for workflow automation backends, built document intelligence services capable of processing and remediating hundreds-of-pages PDFs against accessibility standards, and connected GraphQL APIs via AWS AppSync for mobile and web AI-driven applications. I also have production experience integrating medical hardware APIs, Stripe subscription billing, and HubSpot CRM sync into Java backends the kind of third-party integration work every backend developer eventually owns in a real product. AWS Developer & 𝗖𝗹𝗼𝘂𝗱 𝗘𝗻𝗴𝗶𝗻𝗲𝗲𝗿𝗶𝗻𝗴 ✅ Currently operating as AWS developer on a live healthcare platform Lambda, AppSync, DynamoDB, Cognito, SQS/SNS/SES, S3, API Gateway, Route 53, CloudFormation ✅ Experience as AWS developer across serverless, containerized (ECS/K8s), and IaC (Terraform, CloudFormation) environments ✅ Also experienced across Azure (AKS, Azure DevOps) and GCP as multi-cloud backend developer ✅ Kubernetes, Helm, Docker, OpenShift, Jenkins, Terraform the full DevOps chain every AWS developer deploys through AI developer 𝗖𝗮𝗽𝗮𝗯𝗶𝗹𝗶𝘁𝗶𝗲𝘀 ✅ Delivered AI-powered backend services as AI developer using Spring AI automated content generation and workflow orchestration at scale ✅ AWS AppSync + DynamoDB + Cognito pipeline for a live healthcare platform: the architecture an AI developer builds when latency and data integrity are non-negotiable ✅ Experienced AI developer integrating third-party AI tooling with enterprise Java backends designing event-driven pipelines that handle async AI workloads via Kafka and SQS ✅ As AI developer, built document intelligence features automated PDF tagging, structure remediation, and accessibility validation across large document corpora 𝗜𝗻𝗱𝘂𝘀𝘁𝗿𝗶𝗲𝘀 Healthcare · Fintech · SaaS · E-commerce · Logistics · Telecom · IoT · Blockchain · Automotive · Media 𝗦𝗽𝗲𝗰𝗶𝗮𝗹𝗶𝘇𝗮𝘁𝗶𝗼𝗻𝘀 & 𝗥𝗼𝗹𝗲𝘀 ✔ Senior Java Developer · Java Spring Boot Developer · Java Backend Developer ✔ AWS Cloud Engineer · AWS DevOps Engineer ✔ Azure Cloud Engineer · Google Cloud Engineer ✔ AI Backend Developer · Full-Stack Developer (Spring Boot + React) ✔ AI Backend Developer · Full-Stack Developer (Spring Boot + React) Need a Java developer, backend developer, AWS developer, or AI developer who ships production systems — not prototypes? Drop me a message. 04/06/2026

𝗬𝗼𝘂𝗿 𝘄𝗲𝗯 𝗮𝗽𝗽𝗹𝗶𝗰𝗮𝘁𝗶𝗼𝗻 𝘀𝗵𝗼𝘂𝗹𝗱 𝗳𝗲𝗲𝗹 𝗳𝗮𝘀𝘁 𝗼𝗻 𝘁𝗵𝗲 𝗳𝗿𝗼𝗻𝘁𝗲𝗻𝗱, 𝗿𝗲𝗺𝗮𝗶𝗻 𝗿𝗲𝗹𝗶𝗮𝗯𝗹𝗲 𝗼𝗻 𝘁𝗵𝗲 𝗯𝗮𝗰𝗸𝗲𝗻𝗱, 𝗮𝗻𝗱 𝗯𝗲 𝗲𝗮𝘀𝘆 𝘁𝗼 𝗲𝘅𝘁𝗲𝗻𝗱 𝗮𝘀 𝘆𝗼𝘂𝗿 𝗽𝗿𝗼𝗱𝘂𝗰𝘁 𝗴𝗿𝗼𝘄𝘀. I build end-to-end web applications for businesses that need secure backend systems, responsive user interfaces, scalable APIs, reliable databases, and clean integrations working together as one product. My development stack includes Java Spring Boot, Angular, React, NestJS, Python, TypeScript, MySQL, PostgreSQL, AWS, and Docker. I work across both frontend and backend development, helping clients avoid fragmented systems and unnecessary handoffs between multiple developers. 𝗣𝗿𝗼𝗱𝘂𝗰𝘁𝘀 & 𝗦𝘆𝘀𝘁𝗲𝗺𝘀 𝗜 𝗕𝘂𝗶𝗹𝗱 • Full stack web applications • SaaS platforms and subscription-based products • Admin dashboards and reporting systems • Customer and employee portals • Internal business tools • CRM-connected applications • API-based platforms and integrations • Secure authentication and user-role systems • Workflow and business automation systems • Scalable backend services and microservices 𝗕𝗮𝗰𝗸𝗲𝗻𝗱 𝗘𝗻𝗴𝗶𝗻𝗲𝗲𝗿𝗶𝗻𝗴 I develop backend systems using Java Spring Boot, NestJS, Python, TypeScript, REST APIs, JWT authentication, role-based access control, MySQL, and PostgreSQL. This includes API development, database architecture, business logic, third-party integrations, authentication, performance improvements, and maintainable backend structures. 𝗙𝗿𝗼𝗻𝘁𝗲𝗻𝗱 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗺𝗲𝗻𝘁 Using Angular and React, I build responsive interfaces, dashboards, portals, forms, and single-page applications that connect cleanly with backend APIs. The focus is on usability, performance, reusable components, and frontend structures that remain manageable as new features are added. 𝗖𝗹𝗼𝘂𝗱, 𝗗𝗲𝗽𝗹𝗼𝘆𝗺𝗲𝗻𝘁 & 𝗔𝘂𝘁𝗼𝗺𝗮𝘁𝗶𝗼𝗻 • AWS deployment and cloud configuration • Docker-based development environments • API and third-party platform integrations • GoHighLevel CRM setup and automation support • Workflow automation and funnel integrations • Database and application deployment • Ongoing maintenance and feature development 𝗪𝗵𝗮𝘁 𝗬𝗼𝘂 𝗖𝗮𝗻 𝗘𝘅𝗽𝗲𝗰𝘁 • A clearly structured application • Secure and scalable backend development • Responsive frontend implementation • Proper API and database architecture • Maintainable code rather than temporary fixes • Clear communication throughout development • A system designed for real business use and future growth Whether you need a new SaaS platform, an internal business application, a Java Spring Boot backend, an Angular or React frontend, a NestJS or Python API, or improvements to an existing system, share your requirements and current setup. I’ll help you structure and build a reliable full stack application that is ready for users, integrations, and continued product development. 𝗞𝗲𝘆𝘄𝗼𝗿𝗱𝘀 Full Stack Developer, Full Stack Web Developer, Java Spring Boot Developer, Java Developer, Spring Boot, Angular Developer, React Developer, NestJS Developer, Python Developer, TypeScript Developer, REST API Development, API Integration, Backend Development, Frontend Development, Web Application Development, SaaS Development, Microservices, MySQL, PostgreSQL, JWT Authentication, Role-Based Access Control, Admin Dashboard, Customer Portal, AWS Deployment, Docker, CRM Automation, GoHighLevel, Workflow Automation

Clients come to me for one of two things: building an enterprise-grade system the right way from the start, or rescuing an existing codebase fixing bugs, resolving integration issues, and shipping features other developers left unfinished. I'm Abel, a full-stack developer with 5 years building production systems — from a government justice case management platform to a real-time tax risk engine processing live data through Kafka. I pair Java/Spring Boot microservices with Angular or React frontends, and I turn messy requirements into stable, scalable products. WHAT I HELP WITH ✔ Enterprise & government systems — case management, revenue/tax platforms, complex backend-heavy applications ✔ Microservices & API integration — event-driven architecture, Kafka, REST APIs that hold up under real load ✔ SaaS & MVPs — end-to-end builds with Spring Boot + Angular/React ✔ Rescuing broken projects — messy auth, unstable APIs, half-finished features ✔ Auth & security — Keycloak, OAuth2, JWT done properly ✔ Deployment & monitoring — Docker, Kubernetes, Grafana, Loki MY STACK Backend: Java, Spring Boot, Kotlin, Node.js, Apache Kafka Frontend: Angular, React, TypeScript, Tailwind CSS Databases: PostgreSQL, Supabase DevOps: Docker, Kubernetes, Grafana, Loki, GitHub Actions Auth: Keycloak, OAuth2, JWT Clients tell me I bring enterprise-level discipline to fast-moving projects — clean architecture, clear documentation, and systems that hold up under real load. If your project involves real users, real transactions, or real consequences — let's talk. Send me a message with your project details or requirements, and let's bring your platform to life.