Gene 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 help startups and growing businesses build scalable SaaS platforms, APIs, and modern web applications. With 13+ years of software engineering experience, I’ve worked on production-grade applications ranging from MVPs and SaaS products to high-performance backend systems and complex integrations. What I can help you build: ✔ AI integrations (including RAG and agent development) & API-based systems ✔ Ruby on Rails SaaS applications ✔ MVP development for startups ✔ REST APIs & third-party integrations ✔ React / TypeScript frontends ✔ Scalable backend architecture ✔ PostgreSQL performance optimization ✔ Payment integrations (Stripe, subscriptions, billing) ✔ Docker & AWS deployments ✔ Internal tools & business automation Tech Stack: Ruby on Rails, React, TypeScript, JavaScript, Golang, PostgreSQL, Redis, Docker, AWS, Node.js, Python, Django, FastAPI, Linux, REST APIs, Why clients work with me: * Product-first attitude * Clean, maintainable, production-ready code * Strong communication and reliable delivery * Fast understanding of business requirements * Independent execution with minimal supervision * Long-term collaboration mindset I’m best suited for: * SaaS startups * Long-term product development * Backend-heavy applications * Scaling existing Rails applications * Businesses needing a senior engineer who can own features end-to-end If you need someone who can quickly understand your product and deliver reliable solutions without excessive hand-holding, let’s talk.