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📌 Need a reliable Java developer who can take your system from idea to deployment—fast, clean, and scalable? I’ve been doing exactly that for 14+ years as a Java Spring Boot Developer. As a senior Java Spring Boot Developer, I help businesses build high-performance, cloud-native applications using Java Spring Boot, microservices architecture, and modern engineering practices. Whether you need a Spring Boot developer, a backend architect, or a hands-on Java developer, I bring both technical depth and product thinking. I specialize as a Java Spring Boot Developer in building modular, scalable, and cloud-ready systems. As a Spring Boot developer, I design clean architectures for Java microservices, real-time systems with Kafka or RabbitMQ, and high-load applications. As a Java developer, I ensure systems are maintainable, testable, and optimized for long-term growth. Working as a Java Spring Boot Developer, I frequently collaborate with frontend teams using Spring Boot React and Spring Boot Angular stacks. As a Spring Boot developer, I align backend logic with frontend needs, ensuring smooth integration across JavaScript, HTML CSS JavaScript, and UI layers. My experience as a Java developer also includes working with JavaFX interfaces when needed. Cloud is a key part of my work as a Java Spring Boot Developer. I’ve deployed scalable systems on AWS and GCP, acting as both AWS and GCP architect. As a Java developer, I work with AWS DevOps tools like Lambda, API Gateway, Cognito, S3, and EC2. As a Spring Boot developer, I integrate backend services with GCP tools such as Firestore, Pub/Sub, and Cloud Functions, ensuring performance and reliability. Databases are another strong area. As a Java developer, I’ve worked with PostgreSQL, MySQL, SQL Server, Oracle, MongoDB, and Cassandra. As a Spring Boot developer, I design efficient schemas, optimize queries, and handle large-scale data systems. Every Java Spring Boot Developer project I take on includes a strong focus on database performance and scalability. Clean code and testing are essential in my workflow as a Java Spring Boot Developer. I rely on JUnit testing, TDD, and CI/CD pipelines. As a Java developer, I use Maven, Docker, GitHub Actions, and Jenkins to ensure stable delivery. As a Spring Boot developer, I focus on building systems that are reliable, testable, and easy to extend. 📊 Snapshot of My Expertise 💻 Delivered 20+ systems as a Java Spring Boot Developer, including fintech platforms and SaaS applications ☁️ Worked as a Java Spring Boot Developer and cloud architect using AWS and GCP infrastructure 📊 Optimized large-scale databases as a Java developer, improving performance by up to 60% 🔁 Built intelligent systems integrating Spring AI as a Spring Boot developer 🔐 Secured APIs using OAuth2 and Hibernate as a Java Spring Boot Developer 🧪 Maintained high test coverage using JUnit and CI pipelines as a Java developer 🧰 Collaborated across teams delivering full features as a Spring Boot developer If you’re looking for a Java Spring Boot Developer, a reliable Java developer, or an experienced Spring Boot developer who can handle complex systems and deliver scalable solutions I’m ready to help. 📩 Send me a message I usually reply within a few hours.

Java Spring Developer with over 15+ years of experience building scalable, high-performance solutions across diverse industries. Technical Expertise ✅Spring Ecosystem: Spring Boot, Spring Batch, Spring Cloud, Spring Security, Spring AOP, Spring MVC, JSP, Thymeleaf. ✅ AI : Claude , Codex , RAG ,Integration with OpenAI ✅Microservices & APIs: Microservices architecture, RESTful APIs. ✅Messaging & Event-Driven Systems: Apache Kafka, WebSocket, STOMP, Socket IO ✅Cloud Integration: AWS (ECS Fargate, S3, EC2, ALB, RDS). ✅Database Design: SQL (MySQL, Oracle, Yugabyte, PostgreSQL, MS SQL Server) ✅DevOps & Containers: CI/CD pipelines, Jenkins, Docker, Podman, Kubernetes ✅Search & Caching: Elasticsearch, Redis, Terracotta Caching ✅System Integration & Legacy Modernization: Seamlessly integrate modern applications with legacy systems ✅Frameworks & Tools: JHipster, Keycloak, Flowable, JBPM, Flyway, MapStruct, JavaFX, Java Swing ✅CMS Solutions: Documentum, Alfresco ✅XML & Web Services: SOAP, RESTful services ✅Reporting Tools: Crystal Reports, JasperReports, BIRT ✅Testing Framework/Tools: Junit5,Selenium,JMeter

I’ve successfully completed multiple projects on Upwork with 5-star ratings and positive client feedback. If you’re facing any kind of tech-related problem, I’m here to help. I specialize in backend development, frontend development, and database management. Over the years, I’ve built projects such as: ✅Enterprise Multi-Tenant SaaS POS Application ✅Expense Tracker ✅Food Delivery Web App ✅Smart Pharmacy Management System ✅Retail Billing Software ✅Trading Platform ✅Book Rental System ✅Hospital Management System Previously, I worked as a Junior Backend Developer, where I created REST APIs, fixed bugs, collaborated with frontend developers, and managed databases. Working remotely strengthened my communication skills and taught me how to coordinate effectively with distributed teams. Technical Skills ✅ Languages: Java, JavaScript, Python ✅ Frameworks: Spring Boot, Spring MVC, Hibernate, React, Tailwind CSS ✅ Web Services: RESTful APIs ✅ Databases: MySQL, PostgreSQL, MongoDB ✅ Tools: VS Code, IntelliJ, Eclipse, Postman, Git/GitHub ✅ Frontend: HTML5, CSS3, JavaScript ✅ Practices: Git-based version control, Agile methodology, automated testing What I Can Do for You ✅ Develop and maintain RESTful APIs with Java & Spring Boot ✅ Design scalable and efficient backend architectures ✅ Build dynamic, responsive web interfaces with React, Tailwind CSS, HTML, and JavaScript ✅ Integrate relational databases and ensure data integrity ✅ Debug and fix performance or functional issues across the stack ✅ Collaborate with frontend, backend, and mobile teams for end-to-end solutions ✅ Deploy applications and assist with basic DevOps tasks I believe in clear, friendly communication to keep projects running smoothly and ensure we’re always aligned. Let’s chat about your project and see how I can help bring it to life! “Any fool can write code that a computer can understand. Good programmers write code that humans can understand.” – Martin Fowler

Lead Back-End Engineer | Java + Spring | Building scalable, secure, and investor-ready products For 9+ years, I’ve been helping startups and growing businesses build reliable, fast, and maintainable back-ends that actually support scale — not just run. 💡 What you get working with me: Architecture that lasts: I design solutions that stay clean and efficient even as your product grows. Speed and clarity: Delivering results fast — with clear documentation and full transparency. Cross-domain expertise: Healthcare, E-Commerce, IoT, CRM, E-Learning. I understand business logic, not just code. AI & ML integration: GPT-based and ML-driven systems for smarter automation. Tech stack: Java, Spring (Boot, Security, Data, Batch), Hibernate, PostgreSQL, MongoDB, Redis, Elasticsearch, RabbitMQ, Docker, Jenkins, Linux, GitLab CI/CD. ✅ Bonus: I write clean, test-covered code (JUnit, Selenium) and handle deployment — from staging to production. Let’s turn your concept into a fast, stable, and scalable system. 📩 Message me to discuss your current challenge — I’ll help you find the smartest solution.

Senior Software Developer and Industrial ML Specialist with over 20 years of experience. In my previous role I built mission critical software, including the control systems (SCADA) used to run pipelines, LRT systems, and power plants. Since then I co-founded a startup to build the ML to augment those systems, optimizing industrial systems to reduce power cost and increase throughput, and building failure prediction and detection systems to avoid costly downtime and repairs. My industrial background gives me the experience needed to take software past "production ready" to the five-nine reliability needed when a single glitch can take down a multi-billion dollar production system, or prevent life-saving infrastructure from running in an emergency. As an ML engineer I went back to those same systems with an eye towards the hidden opportunities buried in the raw data. This involved dealing with the complexities of messy real world data such as: missing or malfunctioning instruments, unknown time offsets, unlabelled data, missing logs, and clients with a very different view of the systems. I handled the full lifecycle: data validation and cleaning, feature engineering, model development, application design, and cloud deployment. As a developer I specialize in C/C++, Python, and JavaScript, and am a skilled full-stack developer with strong Linux/Unix system administration skills. My ML specializes in time series, regression, and categorization, but I have built solutions in many other areas including Computer Vision, Reinforcement Learning, and Large Language Models. Having co-founded and led a startup I have a strong eye for evaluating business proposals and focusing on what's needed for a successful MVP. For instance, I know when a particular piece of functionally is critical to the value proposition, and thus needs to be absolutely flawless. And I know which bits of functionality just need to be done as quickly and cheaply as possible so the prototype can get out the door.

🚀 Key Skills & Expertise ✔️ 5+ years of professional experience delivering scalable and high-quality software ✔️ Programming Languages: Java, C# ✔️ Frameworks: Spring Boot, Spring MVC, Hibernate, JPA, Thymeleaf, Angular ✔️ Front-End: HTML5, CSS3, Bootstrap, JavaScript, Angular, AJAX, TypeScript ✔️ Databases: MySQL, PostgreSQL, MongoDB ✔️ DevOps & Cloud: Docker, Kubernetes, AWS, Apache Kafka ✔️ E-Commerce Platforms: Shopify, WordPress, OpenCart 🤝 Why Work With Me ✔️ Fluent in English, German, and Bulgarian (native) ✔️ Reliable, detail-oriented, and committed to clean, maintainable code ✔️ Excellent communication and strong focus on client satisfaction ✔️ Available, responsive, and easy to collaborate with