Building a Profitable AI SaaS as a Solo Developer: Lessons from $5k MRR

After 8 months of building an AI code review tool as a solo developer, I hit $5,000 MRR (Monthly Recurring Revenue). This article shares the strategy, technical decisions, and lessons learned along the way.

The Starting Point

I’m a 10-year Java developer. I knew AI was transforming software development, and I wanted to build something useful — not a chatbot wrapper, but a tool that solves a real pain point.