Senior Java Developer with 16+ years of experience architecting scalable enterprise systems, specializing in Spring Boot microservices, REST APIs, and database optimization. Domain Experience : Banking & Finance, eCommerce, Purchase & Procurement, Legal. What I Deliver: Spring Boot Microservices : scalable, maintainable service architecture RESTful API Development : secure, well-documented, production-grade APIs Database Design & Optimization : PostgreSQL, MySQL, JPA, Hibernate, JooQ Legacy System Modernization : migrate monoliths to modern microservices CI/CD Pipeline Setup : GitLab, Docker, automated testing & deployment Backend Integration : third-party APIs, payment gateways, middleware Performance Optimization : query tuning, bottleneck resolution Code Review & Refactoring : clean code, SOLID principles Technical Skills: Backend & Frameworks : Java (16+ years), Spring Boot (6+ years), Spring MVC (5 years), Struts (3 years), Swing (3 years) API & Security : RESTful API Design, JWT, Keycloak, Swagger / OpenAPI, Postman Databases : PostgreSQL (5+ years), MySQL (3 years), JPA / Hibernate (3 years), JooQ (1+ year) DevOps & CI/CD : Docker (2+ years), GitLab CI/CD (2 years), Git (6+ years), Linux / Ubuntu (3 years) Testing & Quality : JUnit (5+ years), TDD, Test Containers, Integration & Unit Testing, Postman Test, Selenium, Playwright Reporting & Tools : Jasper Reports (3 years), Maven / Gradle (6+ years), Jira (5+ years), Eclipse, NetBeans, JSoup, PDFBox, kafka Frontend Support : Thymeleaf, ZK Framework, Responsive Web Applications 16+ years of proven, real-world enterprise experience Bug-free delivery through rigorous TDD and quality assurance On-time, milestone-driven project execution Clear, responsive and professional communication Full project lifecycle coverage - from requirements to post-delivery support Enterprise-grade, clean and maintainable code every time

Looking for a developer who can own your project end-to-end, deliver clean architecture, write scalable code, and communicate clearly? That’s exactly what I do. I’m a Senior Full-Stack Java Developer with 10+ years of experience building robust, secure, and enterprise-grade SaaS platforms using: 💻 𝐁𝐚𝐜𝐤𝐞𝐧𝐝 𝐄𝐱𝐩𝐞𝐫𝐭𝐢𝐬𝐞 - Java (8–25), Spring Boot, Spring MVC, Spring Security - Microservices architecture - REST APIs & GraphQL - JPA/Hibernate & JDBC - Maven/Gradle - Redis, Kafka, RabbitMQ - Unit & Integration Testing (JUnit, Mockito) 🌐 𝐅𝐫𝐨𝐧𝐭𝐞𝐧𝐝 𝐄𝐱𝐩𝐞𝐫𝐭𝐢𝐬𝐞 - Angular, React, TypeScript - HTML5, CSS3, Tailwind - Responsive UI, component-based architecture 🗄️ 𝐃𝐚𝐭𝐚𝐛𝐚𝐬𝐞𝐬 - PostgreSQL • MySQL • SQL Server • MongoDB • Cloud SQL • Datastore ☁️ 𝐃𝐞𝐯𝐎𝐩𝐬 / 𝐂𝐥𝐨𝐮𝐝 - Docker, Kubernetes, CI/CD - AWS (EC2, RDS, S3, Lambda) - GCP & Azure --------------------------------------------------------------------------------------------------------------------- ⭐ 𝐖𝐡𝐚𝐭 𝐈 𝐂𝐚𝐧 𝐃𝐨 𝐟𝐨𝐫 𝐘𝐨𝐮 I help companies build: ✔ SaaS platforms (CRM, HRM, ERP, dashboards, portals) ✔ Secure, high-volume web apps with clean APIs ✔ Enterprise microservices running at scale ✔ Complete MVPs from scratch ✔ System modernization (Monolith → Microservices) ✔ Admin panels, reporting, workflow automation ✔ Integrations with Stripe, PayPal, Twilio, SendGrid, etc. --------------------------------------------------------------------------------------------------------------------- 💡 𝐖𝐡𝐲 𝐂𝐥𝐢𝐞𝐧𝐭𝐬 𝐇𝐢𝐫𝐞 𝐌𝐞 - Strong architectural thinking - Clean, maintainable code - On-time delivery - Excellent communication - Ability to work independently - Flexible to work with Team - Flexible with time zones - End-to-end ownership (idea → deployment → maintenance) --------------------------------------------------------------------------------------------------------------------- 🔧 𝐓𝐨𝐨𝐥𝐬 & 𝐓𝐞𝐜𝐡𝐧𝐨𝐥𝐨𝐠𝐢𝐞𝐬 - IntelliJ IDEA • Git • Jira • Docker • Kubernetes • Jenkins • Postman • Swagger --------------------------------------------------------------------------------------------------------------------- 🧩 𝐋𝐞𝐭’𝐬 𝐁𝐮𝐢𝐥𝐝 𝐒𝐨𝐦𝐞𝐭𝐡𝐢𝐧𝐠 𝐆𝐫𝐞𝐚𝐭 Whether you need a backend expert, a full-stack developer, or someone to architect your entire SaaS, I’d love to help.

I'm a Java developer with 5+ years of experience as a backend developer, specialising in Spring Boot and microservices architecture. As a Java Spring Boot developer, I build clean, scalable backend systems and REST APIs that hold up under real production load, not just demos. As a backend developer, what I typically own end-to-end: → Java microservices architecture from scratch (domain boundaries, not just code) → Spring Boot monolith-to-microservices migrations with zero-downtime cutover → Secure Java backend services using Spring Security and OAuth2 → REST API design and integration for Java and Spring Boot applications → Clean handoffs — documentation and JUnit test coverage so your team isn't dependent on me I've worked as a Java Spring Boot developer building core backend systems, including real-time payment processing and a microservices-based platform for third-party integrations. I'm a reliable Java developer who communicates clearly and delivers working Spring Boot and microservices solutions on time. If you're looking for a Java developer or backend developer to build, fix, or scale your Spring Boot microservices, let's talk.

🏅 Top Rated Plus Freelancer 🕒 1400+ hours on Upwork ✅ 100% Job Success Score I am a results-oriented bilingual with 12+ years of experience professional who is willing to work with clients worldwide. In my case, I am open to working with startup companies, small businesses, and even multi-national firms. I am deeply involved in all my projects from start to finish. I listen to my clients attentively and provide them a vision for what they want, and then I collaborate with them to create and execute a plan of action. I continuously offer my clients the pros and cons of each choice they make and convey my recommendations for their selections. I would like to give quick short profile summary as below Skills ---------------------------------------------------------------------------------------- • 11+ Years of IT Experience relevant to Java with BFSI domain like Banking & Insurance • Core skills SpringBoot, RESTful webservices, Microservices, JPA • Experience in Unit Testing with JUnit5, Mock/Mockito • Good experience with working on front end applications using JavaScript, JQuery and Bootstrap. • Strong experience with Agile or Scrum methodologies. • Good communicator in English • Experience with SQL Databases (e.g. Oracle) • Strong experience with GIT/BitBucket, JIRA, Jenkins, Confluence, Docker. • Good experience working with Tomcat, Jboss, WildFly • Experience working on Cloud technologies (AWS) • Experience using Apache Solr • Good Experience developing unit / integration test cases using Junit /TestNg. • Experience in Integration, Component and End-to-End Testing • Knowledge of Behavior Driven Development (BDD) for automated acceptance tests • Good ability to understand and work with code developed by other developers. • Very comfortable to work independently with minimal supervision Why me? -------------------------------------------------------------------------------------------- -Provide High Quality Services -Delivers Bug Free Code -Good Listener and Great Communication Skill. -Uses Latest technology for Development. Services I provide ---------------------------------------------------------------------------------------- *Software Development *Web application, Development & Maintenance *Creating Template and Reports *Finding Bug and Resolve. *Solve Programming Problems. I would be happy if employed by you and will work to the best of my ability.

Thanks for reviewing my profile. I’m a client-focused developer with over 6 years’ experience in the tech industry. I have held diverse positions ranging . I can program both python and java very well, so I'm able to rewrite code from one system to another or develop both of directions. For long-term full-time offers (more than 3 months) you have discount (up to 2$ per hour) I hope to hear from you soon to discuss how I can participate in your next project. I am online and available to my clients 24/7 by phone for urgent issues. Stack of technologies I've used: Python (Django), Java (Jsp , Servlet, zkoss), Apache and Nginx configuration, Linux (prefer Ubuntu-centOS), Javascript, Angular , Jquery, HTML, Bootstrap CSS framework. Data storage: Oracle,Mysql, Postgres, Redis, Memcache Source control: Git, Mercurial, SVN , CVS

Are you seeking a proficient developer with 4 years of experience in AI/ML, Python, Java, and C++? I am proficient in: ✅Developing AI/ML Algorithms ✅ Fine-Tuning LLMs (ML, DL models) ✅Building Rag Applications ✅Python Scripting & Automation ✅Desktop Application Development ✅C++ Programming ✅Algorithm Development and Optimization I specialize in Developing Advanced RAG applications, writing optimized ML algorithms. I finetune large language models on your own dataset. Transformer, BERT, GPT, whatever architecture you want, I'll handle it. I do full fine-tuning, LoRA, and QLoRA depending on what fits your hardware and the model size. You don't have to worry about the technical side I set up everything, run the training, and give you the final model ready to use. What I Do ✅ Clean, fix, and prepare your dataset ✅ Format everything the right way (COCO-style if needed, or whatever your model expects) ✅ Run fine-tuning with proper configs ✅ Give you evaluation results so you actually know the model improved Deliver the final model + instructions so you can run it yourself What You Get ✅Fully fine-tuned model ✅Training logs ✅Evaluation metrics ✅Dataset formatting (if you don't have one, I'll build it) ✅Support until everything works on your side Models I Can Fine-Tune ✅LLaMA ✅Mistral ✅Qwen ✅GPT-style models ✅Classification models (BERT, RoBERTa, DeBERTa, etc.) ✅Vision-Language models Anything that can be fine-tuned, I can handle it Who This Is For ✅Startups ✅Researchers ✅Solo developers ✅Anyone who needs a model trained on their own data Extra If you don't have training data, I can help you create, clean, or structure it so it My other expertise lies in developing automation using Python and creating Python scripts to perform different tasks, and also in desktop application development using Java, leveraging my skills to create efficient and user-friendly software solutions. Throughout my career, I've focused on developing desktop applications that meet client needs and exceed expectations. With a strong foundation in Java, Python, and C++ for various programming tasks My approach emphasizes clean, scalable code and a commitment to delivering projects on time and within budget. Whether it's enhancing existing applications or developing new software solutions, I am committed to providing high-quality results that align with your business objectives. If you don't like my work, you don't have to pay a penny! i believe in delivering quality work rather than charging my clients for nothing Let's discuss how I can contribute to your projects and help you achieve success through innovative software solutions. I look forward to collaborating with you!

I'm an expert Java and Grails Developer with 6+ years of experience in building enterprise-grade web applications for both start-ups and Fortune 500 companies. I've developed around 50 + web application from ground up. - I am well versed in developing Front end, backend, API's and web services. - I am fluent in English and have excellent written and spoken communication skills. - I simply follow AGILE and SCRUM as an App Development Strategy. My skills: - Technologies: Java, Grails - Frameworks: Spring Framework, JPA, Apache Struts2, REST Services. - Database Access: JDBC, Hibernate, Spring(JDBC Template, Hibernate Template, Jpa Template), Spring Data. - Databases: MySQL, SQL Server, MongoDB, PostGres, Oracle - Web Application Server - Tomcat Apache, Nginx, AWS and Weblogic Server - Unit Testing Tools: JUnit, TestNG, Mockito - Reporting Tools: JasperReport, iText - Version Control Systems: SVN, BitBucket, GitLab, GitHub, VSS - Project management & Building tool: Maven, Ant

👋 Hi, I am an Oracle Certified full-stack Java developer with 10+ years of experience in software development. 🚀 What I Offer: ✔️ Expert in Java and full-stack development, from backend to frontend ✔️ High-quality, scalable, and maintainable code ✔️ Great communication, proactiveness, and attention to detail ✔️ Ability to work independently or as part of a team 💡 Need help with a Java-related project? Let’s build something amazing together! Tech Stack: 💻 Programming Languages: Java | TypeScript | JavaScript 🖥️ Frontend: Angular | Jasmine | Playwright ⚙️ Backend: Spring Boot | Spring Framework (Spring MVC, Spring Security, Spring Data etc.) | Java EE (JSP, JSF, EJB, JPA) | Hibernate | JUnit | Spock Framework | Testcontainers | Mockito 🖥️ Desktop Applications: JavaFX 🗄️ Databases: MongoDB | PostgreSQL | Oracle Database | MSSQL | MySQL 🚀 DevOps & CI/CD: Docker | Docker Compose | Kubernetes | Jenkins | SonarQube 📡 Protocols & APIs: HTTP, HTTPS, SFTP, SSH | REST, SOAP | AMQP 🛠️ Build Tools: Maven | Gradle | Ant 📩 Let's connect! I’d love to discuss how I can contribute to your project.

I help businesses build scalable, secure, and production-ready backend systems using Java, Spring Boot, Microservices, Kubernetes, AWS, and AI-powered integrations. With 10+ years of experience as a Principal Software Engineer and Software Architect, I specialize in designing high-performance enterprise applications, secure APIs, cloud-native systems, and distributed microservices architectures. Most applications don’t fail because of features, they fail because the backend cannot scale, integrations become unstable, deployments are difficult, or systems become hard to maintain. That’s where I can help. 💼 What I Can Help You With ✔️ Spring Boot & Microservices Architecture ✔️ REST & SOAP API Development and Integrations ✔️ Kubernetes & Docker-based Deployments ✔️ AWS Cloud Deployments & Backend Infrastructure ✔️ Secure Authentication & Spring Security ✔️ PKI & Digital Signature Solutions ✔️ AI-powered Integrations & Automation ✔️ System Refactoring & Performance Optimization ✔️ Enterprise Workflow Automation ✔️ Scalable Distributed Systems Design ⚙️ Backend & Cloud Expertise 🔹 Java, J2EE, Spring Boot, Spring MVC 🔹 Spring Security, Hibernate, JPA 🔹 Microservices & Distributed Systems 🔹 Docker & Kubernetes 🔹 AWS Cloud Deployments 🔹 CI/CD Concepts & Backend Automation 🔹 SQL Server & Database Optimization 🔹 REST APIs & SOAP Services 🔹 React JS & Angular (Full-stack support when needed) 🤖 AI & Modern Systems 🔹 AI-powered workflow integrations 🔹 OpenAI/API-based intelligent automation 🔹 AI-assisted backend systems 🔹 Secure AI integrations for enterprise applications 🔹 Scalable AI-enabled microservices architectures 🔐 Security & Enterprise Systems 🔹 PKI-based Digital Signature Systems 🔹 Authentication & Authorization Flows 🔹 Enterprise-grade secure APIs 🔹 Role-based access systems 🔹 Secure transaction processing 💡 Why Clients Work With Me ✔️ 10+ years of real enterprise experience ✔️ Strong architecture and problem-solving skills ✔️ Focus on scalable and maintainable solutions ✔️ Production-ready code quality ✔️ Clear communication and ownership mindset If you need someone who can quickly understand complex systems and deliver reliable backend solutions with modern cloud and AI integrations, I’d be happy to help.

Working Experience in Telenor BSS. Taking part to transform CBS huawei to Oracle BRM(Billing revenue Management) PLatform. Taking part to transform EVC huawei to ERS PLatform My core responsibilities are: -Develop Rest and SOAP APIs on RED HAT FUSE ESB to communicate with ORACLE BRM Rest services for customer billing. -Develop Rest and SOAP APIs on RED HAT FUSE ESB to communicate with ORACLE BRM Rest services for customer billing. -Develop FrontEnd and Backend and Rest and SOAP APIs for Application EPC(Enterprice Product Catalog). -Architecting Rest and SOAP APIs on RED HAT FUSE ESB to communicate with DownStream ORACLE BRM. Tools and Technology BSS, BRM, CBS, ERS, FUSE ESB, Apache CXF, Active AMQ, JBOSS FUSE, INTELLIJ, PostgressSQL, JIRA, Eclips. I will develop any custom web and wordpress websites according to your requirements. The web will be fully responsive with stunning UI . The product will be exactly like the concept of the web and wordpress you have in your mind. My services in web include: Frontend + Backend development Website Splash Screen Google Spreadsheets Online User Authentication (Email, Gmail, Facebook...) Online Database (Google Firebase,Mysql) SQL-lite Database Wordpress Rest Api Third-party APIs integration Rest API Onesignal Push Notifcations Map/GPS Barcode/Scanner based Payment gateway integration On Demand websites