Esmark D.Private profile: Upwork shows its earnings only to signed-in members, so we check it every few weeks, not daily. MRR here is a rough estimate (Upwork's six-month earnings ÷ months active). Last read Nov 5, 2026.

I’m a seasoned IBMi Developer bridging the gap between the reliability of the IBM i AS400 and the power of the modern AI era. With over 24 years of experience—ranging from System/36 to modern Free-Format RPG—I specialize in transforming 'green screen' legacy environments into high-performance, web-enabled systems. I don't just maintain systems; I modernize them. I am a firm believer that the AS400 belongs in today's tech stack. I lead teams away from green-screen coding into RDi and VS Code, enforcing modern standards. I’ve personally pioneered REST API integrations to connect IBM i with external ecosystems and developed custom solutions for EBCDIC to UTF-8 conversion—specifically handling complex double-byte languages. For me, modernization is a passion; I even spend my weekends building BOTs and web GUIs to prove what this platform can really do. While my roots are in IBM i, my toolkit is diverse. I bring a full-stack mindset to the table with proficiency in Node.js, HTML, JavaScript, and data visualization through QlikView. This allows me to architect solutions that aren't just functional on the backend, but intuitive and modern on the frontend.