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✅ 8+ Years of Java Development Experience ⚡ Full-Cycle Backend Development & Architecture ⚡ AI-Powered Development for Faster Delivery & Better Code Quality 👀 Click Invite or Hire for Scalable Java Backend Solutions Looking for a Java Developer who can build scalable backend systems, SaaS platforms, enterprise applications, and cloud-native solutions designed for long-term growth? For 8+ years, I have helped startups, SaaS companies, fintech businesses, AdTech platforms, and enterprise organizations build secure, scalable, and high-performance software using Java, Spring Boot, PostgreSQL, MySQL, Kafka, GraphQL, AWS, Docker, Kubernetes, and modern cloud technologies. From backend architecture and microservices development to legacy application modernization, API integrations, troubleshooting, cloud deployments, and AI-assisted engineering, I deliver production-ready solutions built to scale. 👉 WHAT YOU GET: ✔️ Java Backend Development & Software Architecture ✔️ Spring Boot Applications & Microservices ✔️ REST APIs, GraphQL APIs & Integrations ✔️ Cloud-Native Applications using AWS ✔️ AI-Assisted Development & Automation ✔️ Legacy System Modernization ✔️ Long-Term Support, Maintenance & Optimization 🏆 KEY ACHIEVEMENTS: ✔️ 8+ years building Java, Spring Boot, and enterprise backend applications ✔️ Built scalable SaaS platforms, fintech applications, AdTech systems, and enterprise software ✔️ Maintained and enhanced 15+ production microservices ✔️ Contributed to Adstrome, TrustArc, Acquia DAM, and Digi-Docket ✔️ Designed secure APIs, event-driven systems, and scalable architectures ✔️ Improved application performance through optimization and modernization ⚙️ CORE EXPERTISE: ✔️ Java, Core Java, Java EE, Spring Boot, Spring MVC, Spring Security ✔️ Hibernate, JPA, JDBC, MyBatis, ORM Frameworks, REST APIs, GraphQL APIs ✔️ Microservices Architecture, Apache Kafka, Event-Driven Systems ✔️ PostgreSQL, MySQL, Snowflake, Query Optimization ✔️ AWS, Docker, Kubernetes, Jenkins, Maven, Gradle, Git, GitHub, Bitbucket, Version Control Systems ✔️ Authentication, Authorization, RBAC, Multi-Tenant SaaS ✔️ ZK Framework & Enterprise Web Application Development 🛠 DEVELOPMENT & MAINTENANCE: ✔️ Web Application Development & Enterprise Software Development ✔️ Spring MVC & ZK Framework Application Development ✔️ Legacy Application Maintenance, Modernization & Application Upgrades ✔️ Feature Development & Application Enhancements ✔️ Bug Fixing, Root Cause Analysis & Production Support ✔️ Performance Bottleneck Analysis & Optimization ✔️ Memory Leak Detection & Resolution ✔️ Security Vulnerability & CVE Remediation ✔️ Third-Party API Integration & Business Workflow Automation ✔️ Performance Optimization & Scalability Improvements ☁️ CLOUD & DEVOPS: ✔️ AWS Cloud Services, Docker Containerization & Containerized Application Deployment ✔️ Kubernetes Container Orchestration for Scalable Cloud Infrastructure ✔️ Linux-Based Server Systems, Linux Server Administration & Linux Server Troubleshooting ✔️ Apache Tomcat Installation, Deployment, Monitoring & Performance Tuning ✔️ CI/CD Pipelines, Jenkins Automation, Git, GitHub, Bitbucket & Version Control Systems ✔️ Web Application Troubleshooting, Production Environment Support & Incident Resolution 🧪 TESTING & QUALITY: ✔️ JUnit, Mockito, Unit Testing & Integration Testing ✔️ Test-Driven Development & Automated Testing ✔️ API Testing, Debugging & Log Analysis ✔️ Root Cause Investigation & Production Stability ✔️ Code Quality Improvements & Maintainable Software Development ✔️ Regression Testing & Application Reliability Improvements 🤖 AI-ENHANCED ENGINEERING: ✔️ AI-Assisted Development & AI-Powered Coding Workflows ✔️ OpenAI API Integration, LLM Workflows & AI Automation ✔️ AI-Assisted Testing, Refactoring & Documentation ✔️ Faster Delivery Through AI-Enhanced Engineering 🏢 INDUSTRY EXPERIENCE: ✔️ SaaS Platforms & Enterprise Applications ✔️ AdTech & Programmatic Advertising ✔️ Fintech & Loan Processing ✔️ Privacy & Compliance Systems ✔️ Digital Asset Management ✔️ Multi-Tenant & White-Label Solutions 🚀 WHY CLIENTS CHOOSE ME: ✔️ 8+ Years of Java Development Experience ✔️ Enterprise SaaS & Microservices Expertise ✔️ Strong Spring Boot & Cloud-Native Skills ✔️ Scalable, Secure & Maintainable Solutions Whether you need to build a backend platform from scratch, scale an existing SaaS application, maintain a legacy system, resolve performance bottlenecks, remediate security vulnerabilities, implement microservices, modernize enterprise software, deploy applications on Tomcat or Linux-based server systems, integrate AI capabilities, or optimize application performance, I can help. Looking for a Java Developer, Senior Java Developer, Java Backend Developer, Spring Boot Developer, Java Architect, Backend Engineer, Enterprise Software Developer, API Developer, GraphQL Developer, AWS Developer, Cloud Engineer, Kafka Developer, Software Architect, Backend Architect, or Java Consultant?

$400K+ earned across 107 Upwork projects. I'm Aqeel Haider, founder of a small, dedicated team, not a solo freelancer at Machine Intelligence 6. 9+ years building enterprise Java systems, including a single engagement spanning 9,900+ hours. We build full-stack SaaS platforms end-to-end, including healthcare, hospital management, real-estate and mental health platforms. 𝗬𝗼𝘂 𝗺𝗶𝗴𝗵𝘁 𝗯𝗲 𝗵𝗲𝗿𝗲 𝗯𝗲𝗰𝗮𝘂𝘀𝗲: - You have an idea for a platform but aren't sure how to structure it - Your current software is slow, outdated, or a pain to maintain - Your last developer left messy code and no documentation - You're still running the business on spreadsheets and manual work - You need web, mobile, admin, and backend to work as one system, not five disconnected pieces 𝗪𝗛𝗔𝗧 𝗪𝗘 𝗕𝗨𝗜𝗟𝗗 Custom SaaS platforms Healthcare, clinic & mental health platforms Marketplaces & admin dashboards CRM / ERP / LMS systems Booking & subscription platforms API integrations & automation tools 𝗛𝗢𝗪 𝗪𝗘 𝗪𝗢𝗥𝗞 Understand your business flow and requirements (PRD) Design the architecture and system flow Design UI/UX, if not already available Build the backend (mostly Java Spring Boot) and frontend (React, Next.js) Use AI tools to speed up development without cutting corners on quality Test, launch, and support long-term 𝗦𝗧𝗔𝗖𝗞 React/Next.js, Java Spring, Node.js/Laravel/FastAPI, PostgreSQL/MongoDB, AWS/Docker, Stripe/Auth0, OpenAI APIs — chosen based on your requirements, not what's trendy. 𝗪𝗛𝗔𝗧 𝗖𝗟𝗜𝗘𝗡𝗧𝗦 𝗦𝗔𝗬 "Aqeel and his team at Mi6 are highly professional. Their attention to detail is fantastic and their problem solving is second to none." "We couldn't be happier with the service received from Aqeel and his team at Mi6. We highly recommend them." "As always, perfect service from Machine Intelligence 6. Communication is fantastic and turn-around time for jobs is great!" Currently building a healthcare SaaS platform designed around HIPAA compliance requirements — data security, access controls, and PHI handling. I prefer long-term partnerships. Send me your idea, your current mess, or your unfinished product, and I'll tell you honestly what it actually needs. Aqeel Haider Founder, Machine Intelligence 6

⭐⭐⭐⭐⭐ Top Rated Plus on Upwork 100% Job Success Score 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

Hello Greetings Of The Day Hi, I am a Full Stack App and Web Developer with many skilled and certified developers also attached to me. We are serving and making our clients happy and satisfied. Together, we can provide all kinds of IT solutions with the main skills mentioned below: 1. Software Developer .NET Core,.NET Framework, C#, Web Forms, Java, Angular, Web Services, Rest API, SQL, HTML, CSS, Bootstrap, jQuery, typescript, Java Script. 3. Desktop programming languages: Java, Objective C, Swift, JavaScript, Scala, Python, C#, C++, C, and Visual Basic. Web Technologies React.js, Axios, Express.js, Node.js, Mongoose Redux, Angular, Backbone, JQuery, and other frameworks HTML, CSS, and Javascript PHP, Laravel, Codeigniter, Smarty, WordPress, Symfony MS Technologies C#, ASP.Net, VB.Net, WCF, WPF, MS BI, Windows Internals Web Hosting / Tools AWS, S3, AWS EC2, AWS Media Services, Git, Trello, Slack, Asana. Databases SQL Server, MySQL, PostgresSQL, MongoDB, Firebase, and GreenPlum

Are you looking to build a high-performance software application from scratch? Or do you need a seasoned technical leader who can effortlessly bridge the gap between complex backend architecture and a highly responsive, visual frontend? With over 13 years of enterprise-level experience, I specialize in taking web systems from a blank canvas all the way to a polished, production-ready end product. Technologies & Frameworks Working Experience (Backend + Front-End) Java Spring Boot Micro-Services REST API MySQL DynamoDB MongoDB Angular 4 Tailwind CSS Svelte 5 + SvelteKit D3.js Fabric.js Dynamic SVG Rendering AWS Cloud Infrastructure (EC2 , ECS , Cloudwatch , Cloudformation , S3 , Lambda , Amplify , Route53 , VPC , Load Balancing , ASGs) Git (Code Managment) Development of Data-Rich Interfaces Whether you are launching a new platform from the ground up or modernizing an existing legacy ecosystem, I bring the technical depth, execution speed, and architectural oversight needed to ensure success.

Build Scalable Enterprise Systems with a CTO Mindset | Java Spring Boot & Full-Stack Expert High-quality code is not an expense—it’s an investment. I don’t just write endpoints; I architect systems that scale with your business. With a deep focus on the Java ecosystem and modern web technologies, I help startups and established companies turn complex requirements into robust, production-ready solutions. Whether you are building an MVP or scaling a microservices-based platform, I ensure your backend is secure, fast, and maintainable. What I Bring to Your Project: ✅ Strategic Architecture: Designing scalable systems using Spring Boot, focusing on Clean Architecture and SOLID principles. ✅ Security First: Implementing industry-standard security with Spring Security and JWT to protect your data. ✅ Performance & Optimization: Leveraging PostgreSQL, Redis, and optimized query logic for high-load applications. ✅ Seamless Integration: Connecting your system with third-party APIs, payment gateways (like PayZo), and automated services. ✅ Mentorship & Leadership: As a CTO at heart, I ensure the development process follows best practices, making the code easy to handover or scale. Core Tech Stack: ● Backend: Java, Spring Boot (Web, Security, Data JPA, Cloud), NestJS, Rust. ● Frontend: React.js, TypeScript, Tailwind CSS. ● Mobile & Desktop: Tauri. ● Infrastructure: Docker, PostgreSQL, Redis, RESTful API Design. Recent Success: Successfully delivered a high-performance Bookstore Management system with complete API documentation (Swagger/Postman) and 100% client satisfaction on Upwork. If you’re looking for a developer who understands business goals as well as they understand code — let's have a chat and build something great together.