To work in an environment which encourages me to succeed and grow professionally where I can utilize my skills and knowledge appropriately. Software Languages : Java 8, J2EE, SQL, HTML, CSS, XML, Dart. Architecture and Frameworks : Spring, Spring boot, Angular, Micro services, REST Webservices. Databases : Postgre sql, MySQL, Oracle sql. Software Tools : Eclipse, Toad, Post man, Spring Tool Suite, PG admin, SQL yog. Web Server : Apache 2.4, Tomcat 8.0. Code repository: GIT, GIT Bash, Bitbucket, SVN, Azure devops. Cloud Service : AWS (S3,EC2), Azure (Storage account, Virtual machine). I am enjoinig working with small businesses and individual decision makers to provide architectural and custom business solutions that help my clients resolve mission-critical problems, grow their business, and improve their revenue stream and profitability.

Profile Summary Experienced Senior Java Developer with over 11 years of expertise in designing and developing scalable, secure, and high-performance enterprise applications across healthcare, ERP, IoT, and financial domains. Specialized in microservices architecture, payment integration, RESTful APIs, and cloud-native development. Adept in Java, Spring Boot, Kafka, and PostgreSQL with a strong understanding of PCI-DSS compliance, multithreading, and real-time transaction systems.

Greetings! I am graduate from computer science and engineering. If you are looking for a Hardworking and Talented Software Engineer/Programmer for your Project/Assignment. I am always ready to work on your Project/Assignment within your Budget. I am very much straight forward and high work Standard is my capital. I have 9+ years of experience on Software Development and successfully completed different projects on Upwork and Elance. I am 24/7 available @Skype @Facebook. I have Participated ICPC contest of recent years 2012, 2013, and 2014. I solved lots of online judge problems on UVA, Codeforces ,Codeshef, Topcoder etc. Solved 420 critical problems in UVA online judge and ranked in top thousand programmers in world. Why me? ---------------------------------------------------------------------------------------- *100% Bug Free Code *Provide High Quality Services *Good Listener and Great Communication Skill. *Use Latest IDEs for Development. *Free 14 Days Support after Completing the Project/Assignment. Services I provide ---------------------------------------------------------------------------------------- *Software Development. *Web Design, Development & Maintenance. *Responsive Design for small and large devices. *Creating Template and Reports. *Finding Bug and Resolve. *Solve Assignments and Programming Problems. Technology I Use --------------------------------------------------------------------------------------------------- #C #C++ (Win 32 API,MFC,QT,Opengl) #Java #Spring Boot #Spring Boot Webflux #Jsp #Java Script #Android #HTML #CSS #Jasper iReport #MySQL #Oracle #SqLite I am always ready to take coding challenges and always work for developing my skills.

⚡ If your system needs to scale, stay secure, and actually work under real-world pressure I’m the person you bring in. I’m a Senior Full Stack Architect with 10+ years of experience designing and building enterprise-grade platforms, microservices ecosystems, and AI-powered applications. I don’t just build features I design systems that don’t break. 💼 What I Help You Achieve Most clients come to me when they face: • A system that’s slowing down or failing at scale • Poor architecture decisions causing long-term issues • Need to integrate AI into real business workflows • Backend that works… but isn’t reliable or secure • A product that needs to go from MVP → production properly 👉 I fix these by building clean, scalable, and production-ready systems from the ground up (or improving existing ones). 🧠 My Core Expertise 🔹 Backend & Architecture (My Strongest Area) • Java (Spring Boot, Spring Security, JPA, Hibernate) • Microservices & event-driven systems • API design & system integrations • Performance optimization & reliability engineering 🔹 Full Stack Development • Angular, React, Next.js • Scalable frontend architecture • Clean, maintainable UI systems 🔹 AI Integration (Where I Add Extra Value) • OpenAI, LangChain, LlamaIndex • RAG pipelines & semantic search • AI agents & workflow automation • Document intelligence systems 👉 I don’t just add AI I integrate it in a way that actually improves business outcomes. ☁️ Cloud & DevOps • AWS architecture & deployment • Docker & CI/CD pipelines • Scalable, distributed systems 🏆 Proven Track Record ✔ 100+ systems delivered (enterprise + startups) ✔ 15,000+ hours of real-world development ✔ Long-term client relationships & repeat work 💡 How I Work (This Is Why Clients Stay) • I think in architecture, not just code • I focus on long-term scalability, not quick hacks • I communicate clearly — no confusion, no guessing • I take ownership from planning → deployment • I build systems that are easy to maintain and extend 🎯 When You Should Hire Me ✅ You need a serious engineer, not just a coder ✅ Your system must be stable, secure, and scalable ✅ You want to integrate AI properly (not just hype) ✅ You care about long-term quality over shortcuts 🚫 Not a Good Fit If ❌ You’re looking for the cheapest option ❌ You need quick fixes without proper architecture ❌ You don’t value clean, maintainable code 🚀 Let’s Build Something That Lasts If you’re building a product where performance, scalability, and reliability actually matter Send me a message with your project details. I’ll quickly tell you the best way to approach it.

✅ Rewarded as TOP RATED PLUS by Upwork (Top 3%) ✅ 9000 + Hours on Upwork ✅ 100% Job Success and Customer Satisfaction ✅ 7 Plus years of Experience in Java Development ✅ Fluent in English ✅Worked with 3 Major IT firms. IT professional with 7 years of experience specializing in software development, unit testing, and support. With a robust background in Java/Java EE, RESTful Web Services, and various databases, I bring expertise in designing and implementing efficient solutions. I have successfully contributed to projects involving Spring Boot, JSF, Docker, Hibernate, and more, delivering high-quality results in the field of application design. 🌟 My Specialization 🌟 ✅ Java (8, 11 & 17): JavaSE, JavaFx, J2EE, JDBC, Swing, Java Beans, Java Mail ✅ Databases: PostgreSQL, MySQL, NoSQL (DynamoDB, MongoDB) ✅ Backend Technologies: Spring Boot (Microservices), Enterprise Java Beans (EJB), Servlets ✅ Frontend Technologies: ✅ Angular, React, PrimeFaces, JSP, JavaScript, CSS, Bootstrap (HTML5) ✅ Frameworks: J2EE, Struts 🌟 Worked on following major applications 🌟 ✅Event Management System with Skild Inc. ✅Worked with Tracking Management System for Shipment Company ✅EDOC, Information Management System ✅Tower Management System with Telecom Industry ✅Data Parsing Application ✅ Micro Services, Resful Webservices, SOAP APIs, Rest APIs

Senior Backend Engineer | Java, Spring Boot | Scalable & AI-Integrated Systems I am a Senior Backend Engineer with experience building secure, scalable, and production-grade backend systems across financial and AI-driven platforms. In my full-time role, currently I work on real-world financial systems where accuracy, validation logic, performance, and reliability are critical. My responsibilities include complex business rule implementation, currency and IBAN validation, stored procedure optimization, secure integrations, and microservices-based architecture using Java and Spring Boot. In parallel, I have delivered two complete freelance backend projects end-to-end: 🛒 Multi-Vendor Marketplace Platform Architected and implemented a full backend system supporting authentication (OTP-based), role-based access (buyer/seller/admin), vendor approval workflows, product lifecycle management, order processing, reporting dashboards, and structured API documentation. 🧬 AI-Powered Biomarker Analysis Platform Built an AI-driven backend using FastAPI, LangChain, and OpenAI (GPT-4) to analyze biomarker data and generate structured 90-day health plans. The system includes PDF lab report parsing, structured prompt orchestration, JSON validation with retry handling, and consistent multi-batch plan generation. Core Expertise REST API Design & Clean Architecture Microservices (Spring Boot) Complex Validation & Business Logic Database Design & Optimization (PostgreSQL, SQL Server) Stored Procedures & Performance Tuning Secure Authentication & Authorization Docker, Kubernetes, CI/CD & Azure I focus on building production-ready systems — not prototypes — with clean architecture, strong validation, and long-term maintainability. If you need a backend engineer who understands both scalable systems and AI integrations, I’m ready to help.

I help businesses build reliable backend systems, scalable APIs, workflow automation, and full-stack applications that support real operational growth. With strong experience in Java Spring Boot, Python, and modern deployment practices, I deliver production-ready systems that prioritize maintainability, performance, and business continuity. A recent project involved delivering a large-scale medical insurance platform to production in Kenya, supporting 50+ insurance schemes and complex workflows including claims processing, prior authorizations, reimbursements, provider payments, and member management. Core strengths: Java Spring Boot backend systems Python development and automation REST/SOAP third-party integrations Kafka and asynchronous architectures PostgreSQL & SQL Server performance optimization Docker, Kubernetes, CI/CD, Git, Linux AWS (plus some GCP exposure) Full-stack support with Node.js and Next.js I work through clear milestones, maintain strong communication, and focus on delivering stable systems that remain easy to maintain after project handoff. My goal is simple: build dependable software that solves real business problems.

𝗡𝗲𝗲𝗱 𝗮 𝗙𝘂𝗹𝗹 𝗦𝘁𝗮𝗰𝗸 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗲𝗿 𝘄𝗵𝗼 𝗰𝗮𝗻 𝗯𝘂𝗶𝗹𝗱 𝗰𝗹𝗲𝗮𝗻, 𝘀𝗰𝗮𝗹𝗮𝗯𝗹𝗲 𝘄𝗲𝗯 𝗮𝗽𝗽𝘀? I help businesses build reliable full stack web applications using Java Spring Boot, Angular, React, Python, NestJS, and TypeScript. My work focuses on clean backend architecture, secure APIs, responsive frontend interfaces, database structure, and scalable systems that are easy to maintain long-term. 𝗪𝗵𝗮𝘁 𝗜 𝗰𝗮𝗻 𝗵𝗲𝗹𝗽 𝘄𝗶𝘁𝗵: • Full Stack Web Application Development • Java Spring Boot Backend Development • Angular and React Frontend Development • Python and NestJS Backend Systems • REST API Development and Integration • MySQL and PostgreSQL Database Design • Authentication, JWT, and Role-Based Access • Admin Panels, Dashboards, and SaaS Platforms • AWS Deployment and Docker Environments • GoHighLevel CRM Setup and Automation Support 𝗖𝗼𝗿𝗲 𝗧𝗲𝗰𝗵 𝗦𝘁𝗮𝗰𝗸: Backend: Java Spring Boot, NestJS, Python, TypeScript, REST APIs, MySQL, PostgreSQL, JWT Frontend: Angular, React, JavaScript, TypeScript, Responsive UI, Single Page Applications Infrastructure: AWS, Docker, cloud deployment, scalable application setup Automation: GoHighLevel, CRM setup, workflow automation, funnel integrations 𝗛𝗼𝘄 𝗜 𝘄𝗼𝗿𝗸: • Clean, maintainable code • Clear and proactive communication • Scalable architecture, not quick patches • Frontend and backend built with long-term product growth in mind 𝗥𝗲𝗮𝗱𝘆 𝘁𝗼 𝗯𝘂𝗶𝗹𝗱 𝗮 𝗳𝘂𝗹𝗹 𝘀𝘁𝗮𝗰𝗸 𝘄𝗲𝗯 𝗮𝗽𝗽 𝘁𝗵𝗮𝘁 𝘄𝗼𝗿𝗸𝘀 𝗿𝗲𝗹𝗶𝗮𝗯𝗹𝘆? Send me your project details and I’ll help you build a clean, scalable application with the right backend, frontend, APIs, database, deployment setup, and automation support. 𝗞𝗲𝘆𝘄𝗼𝗿𝗱𝘀: Full Stack Developer, Java Spring Boot Developer, Spring Boot, Java Developer, Angular Developer, React Developer, Python Developer, NestJS Developer, TypeScript Developer, REST API Development, API Integration, Backend Development, Frontend Development, Web Application Development, SaaS Development, MySQL, PostgreSQL, AWS Deployment, Docker, JWT Authentication, Admin Dashboard, CRM Automation, GoHighLevel, GHL

Hello and welcome to my profile! My name is Vadym. I'm a skilled Java and Python developer from 🇺🇦 My expertise is Backend development. But also I have experience with Angular 2+. I continue to improve my skills and already know that the best way to learn something new and evolve as a professional is to work on the projects as a part of a team. My main areas of expertise: Backend: Python, Java Frontend: HTML/CSS –basic, Angular 2+ Frameworks: FastAPI, Spring Framework (SpringMVC, Spring Boot, Spring Data, Spring Security) ORM: Hibernate Testing: pytest, FastAPI TestClient, JUnit, JMeter VCS: Git (GitHub) Databases: PostgreSQL, MySQL, MongoDB, SQLite, MS SQL Server, Supabase Build automation tools: Maven, Gradle API documentation tools: OpenAPI, Swagger IDE: Cursor, PyCharm, IntelliJ IDEA Other: REST API, Lombok, Docker, Postman, Pydantic, Heroku, Stripe, Amazon APIs (general familiarity) Ready for any skills evaluation, test task, technical interview. My main goal is to find an interesting project, so if you need a talented developer with technical background let's discuss our cooperation!

👋 Hello! I'm Ahmed, a passionate Full Stack Developer with expertise in Java, SQL/NoSQL databases, JavaScript, and Angular. I thrive on creating seamless and dynamic web solutions, with a solid understanding of Core Java components, JavaFX, and extensive experience in web development using the Spring Framework, Spring Boot, JPA, and Hibernate. 🔧 What I bring to the table: 💻 Java Programming 🌱 Spring Framework & Spring Security ⚙️ Hibernate & JPA 🧪 JUnit 5 🐘 PostgreSQL & MySQL 🗂️ NoSQL Databases 🛠️ JavaScript & TypeScript 🎨 Angular, HTML, CSS3, SCSS 🔍 I specialize in building full REST API applications and crafting user-friendly, interactive interfaces. My goal is to not just meet your expectations but exceed them with punctuality, creativity, and dedication to delivering high-quality solutions. 💡 Ready to take your project to the next level? Let’s collaborate and create something amazing together! 🚀 Looking forward to hearing from you soon! Best Regards, Ahmed I.