Own the complete technology function for a peer-to-peer fundraising platform as its sole engineer. Responsibilities include setting the technical roadmap, managing payment processing and reconciliation, shipping AI features, improving testing and deployment practices, addressing fraud and abuse, controlling infrastructure costs, communicating with non-engineers, and owning uptime and incident response. The role requires strong production experience with financial systems, PostgreSQL, LLM features, engineering-process improvement, and independent technical ownership.

Mudflap seeks software engineers to build and scale their payments platform using Ruby on Rails, collaborating cross-functionally and owning features end-to-end.