Stefan Dumitriu Backend developer with 19+ years of experience in SQL, DB2, Java Spring Boot, and Linux

Why should you work with me ?

The bridge between complex data and high-performance code. With a career spanning over 19 years at Harte Hanks , I have evolved from a Database Analyst deeply embedded in SQL and DB2 into a Senior Software Developer focused on the Java Spring ecosystem. I specialize in building mission-critical backend services where data integrity and system scalability are non-negotiable. My Professional Journey: - The Data Era (14 years): I built my foundation in advanced SQL and DB2 , optimizing schemas and mission-critical reports that reduced system downtime by 60%. - The Java Pivot (Last 5 years): I transitioned into full-stack web development, mastering Java 17, Spring Boot, and JPA. For the last four years, I have operated exclusively in a Linux environment, leveraging its power for more efficient development and deployment. Modern Tools & Innovation: - I believe in working smarter. I proactively integrate AI-assisted development tools—including Gemini CLI and Codex—to refactor legacy code, identify bottlenecks, and boost coding efficiency by up to 30%. Whether it's managing CI/CD pipelines in Git or experimenting with Golang and React, I am always looking for the next tool to solve complex problems. Beyond the Office: I’m currently building a full-stack trading application from the ground up. This personal project allows me to experiment with a modern stack including PostgreSQL (Neon), React (Vercel), and Java (Render), keeping my skills sharp in cloud-native environments. Technical Toolkit: - Backend: Java 17+ (Spring Boot, Spring Data JPA), C# (.NET Core), Golang. - Data: SQL (PostgreSQL, DB2), Schema Optimization, Stored Procedures. - Tools: Linux CLI, Git, Gemini CLI, Codex (ChatGPT).