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Professional Java Backend Developer | 10+ Years | Spring Boot, AWS, Docker I’m a Senior Java Backend Developer with 10+ years of hands-on experience building scalable APIs, microservices, and enterprise platforms. 🔹 Tech Stack: Java 11/17, Spring Boot, REST APIs, AWS (EC2, S3, RDS, Lambda), Docker, PostgreSQL, MongoDB 🔹 Architecture: Microservices, Monolith refactoring, Event-driven systems, Domain-driven design 🔹 DevOps: Docker, GitHub Actions, CI/CD pipelines, basic Terraform ✅ Clean code, solid documentation, on-time delivery ✅ I communicate clearly and think in business value – not just code Open to both small tasks (bugfix, optimization, deployment) and long-term system work. Let’s talk and see how I can help your project move forward.

I'm a Java-developer with 7+ experience in building enterprise applications. Working for the customer, I have 100 percent success and solve problems in the shortest possible time. My skill set includes technologies for backend: ⭐Spring ⭐Hibernate ⭐SQL ⭐Kotlin ⭐Apache Tomcat ⭐Jboss ⭐Maven ⭐Gradle Frontend: ⭐Angular ⭐Typescript ⭐Vaadin DevOps: ⭐Jenkins ⭐Teamcity ⭐uDeploy ⭐Kubernetes ⭐Openshift ⭐Linux ⭐Bash ⭐Python ⭐Groovy Also I developed several applications from scratch: ⭐Telegram bot for real estate searching ⭐Telegram game: text RPG-game ⭐Spring-boot application for working with customer ⭐Android puzzle game I am ready to work and develop professionally, contributing to the growth of your organization.

I build backend systems and API integrations that move payroll and accounting data correctly in production. Recent work: full DATEV API integration for a German HR platform (see review below). I own the messy parts. OAuth flows, statutory data mapping, legacy handshakes, and deployment. 1,300+ enterprise hours in production Spring Boot and Kubernetes environments with full CI/CD ownership. Stack: Java · Spring Boot · Go · Kubernetes · React · REST API design Top Rated · 100% Job Success · $30K+ earned 3 Recent Hackathon wins · 1st place If you need an integration built, an API connected, or backend infrastructure that actually holds up, let's talk.

🌍 About Me Hello! I’m Dragisa Stankovski, but you can call me Gisa. I’m a dedicated and passionate Senior Java Developer from Serbia, with more than 8 years of experience building scalable, secure, and high-performance software solutions across various industries. Since my early teens, programming has been more than a job — it’s been my passion. That passion has led me to deliver clean, maintainable, and production-ready code that drives business value. 🎓 Background & Certifications 🎓 Master’s degree in Computer Science ✅ Certified Java SE Programmer 🧠 Strong foundation in object-oriented design, clean code, and SOLID principles 💡 Quick learner and self-starter, always up-to-date with the latest trends 💼 What I Bring to the Table 🔧 Backend Development (Core Focus): Java 8–21, Spring Boot 2/3, Spring WebFlux, Spring Security Reactive programming, WebFlux, Mono/Flux JWT, OAuth2, Keycloak integration REST & SOAP APIs, OpenAPI (Swagger) 🐳 DevOps & Cloud Infrastructure: Docker, Docker Compose GitHub Actions, CI/CD pipelines Helm, Kubernetes (basics) AWS, Azure, Terraform (basics) 🗃️ Database & Persistence: PostgreSQL, MySQL, Oracle R2DBC, JPA, Hibernate Liquibase, Flyway 🖥️ Frontend & Full Stack Experience: Angular 12–18, TypeScript React (basic to intermediate level) Liferay Portal (JSF/Thymeleaf-based UI) 🛠️ Tools & Project Practices: Git, IntelliJ IDEA, Maven, Gradle Jira, Confluence, Scrum & Agile Unit Testing (JUnit5, Mockito), Postman API-first development with OpenAPI Generator 🚀 Project Highlights 🔹 Finance Management System – Designed and built a modular microservices architecture with Spring Boot, PostgreSQL, and Angular. Implemented custom budgeting, savings goals, PDF generation, and recurring transactions. 🔹 Badge Management & Access Control System – Developed secure integration with Keycloak and complex reactive APIs for user/badge permissions using R2DBC and WebFlux. 🔹 AI-Based Crypto Price Tracker – Built a real-time crypto tracker (Arbitrum/Optimism) with RSI-based signal logic, alerts via Telegram, and external price fetchers integrated via WebClient. 🔹 GDPR Data Cleanup – Designed a dynamic and generic data deletion/update framework using R2DBC, Custom SQL builders, and tenant-aware logic. 🔹 Kubernetes-based Deployment – Containerized services with Docker, wrote Helm charts for deployment, and used GitHub Actions for CI/CD in a multi-tenant architecture. 🤝 Why Work With Me? Clear and honest communication I take ownership of problems and propose solutions Well-documented, scalable, and tested code Always on time, always collaborative Client satisfaction is not just a goal — it’s a rule 📢 What My Clients Say (sample placeholder) “Dragisa is a fantastic developer — he quickly understood the problem, refactored legacy code, and delivered a scalable microservice ahead of schedule.” Let’s Connect! Whether you need to fix a nasty bug, build a microservice from scratch, or containerize your application for production — I’m here to help. Let’s work together to bring your project to life. Feel free to invite me to your job — I’ll respond quickly and give you 110% commitment.

Senior Backend Engineer with 11+ years building production Java/Spring systems for fintech, SaaS, and distributed platforms. I help startups and product teams ship reliable backends: APIs, microservices, event-driven architecture, auth/multi-tenancy, and integrations — from design to production. What I typically own: • Spring Boot 3 / Java 21 APIs and service design • Kafka event-driven systems, async processing, integrations • PostgreSQL data modeling, performance, migrations (Flyway) • Auth & multi-tenant security (JWT, RBAC/ABAC, Spring Security) • Docker/Kubernetes, CI/CD (GitHub Actions, Jenkins) • Real-time features (WebSocket / MQTT) when needed Relevant background: • FIS — post-trade derivatives clearing with CQRS/Event Sourcing (Akka/Lagom, Kafka, Couchbase) • HTEC — 20+ microservice platform for autonomous vehicle ops (mission management, dispatch, billing, tracking) • Built end-to-end: multi-tenant SaaS backend (ABAC, real-time dashboard) and analytics platform (live ingestion, simulations, billing) Best fit projects: • New Spring Boot backend / MVP → production • Microservices refactor / Kafka integration • Auth, multi-tenant SaaS, payments/fintech backends • Performance, reliability, and production hardening Availability: part-time or project-based (timezone-friendly for EU / US overlap). Message me with the problem + stack + timeline — I’ll reply with a clear approach and estimate.

Experienced Java Developer | Spring Boot | Microservices | AWS | CI/CD With 7 years of hands-on experience, I specialize in developing high-traffic applications primarily using Java. My expertise lies in building high-throughput applications utilizing the Spring framework and its related projects, including Spring Boot, Spring Reactive, Spring Security, and Spring Data. I have worked on systems using both monolithic and microservice architectures, developing complex applications used by millions of users. In these systems, I have utilized Kafka for stream processing, various message queues such as ActiveMQ and Amazon SQS for efficient communication, and Redis for caching. Additionally, I have worked extensively with database technologies like MySQL, PostgreSQL, and MongoDB to manage and store data effectively. I have successfully deployed applications both on-premises and in the cloud (AWS), leveraging Docker and Kubernetes for efficient containerization and orchestration. My experience extends to setting up CI/CD pipelines, ensuring smooth and automated deployment processes. If you are looking for a skilled and reliable Java developer to bring your project to life, let's connect and discuss how I can contribute to your success.