Principal Backend Engineer: Scale High-Volume FinTech

SR2 | Socially Responsible Recruitment | Certified B Corporation™ is seeking a Principal Backend Engineer to lead the architectural evolution of a high-growth FinTech backend platform. This role is deeply technical and hands-on, demanding strong judgment to raise engineering standards and build scalable systems.

You'll own the backend direction, design high-scale services, implement robust APIs, ensure reliability with observability, and mentor engineers while leveraging AI-assisted tooling to