Senior Full-Stack Software Engineer, Applied AI at Circle (circle.so)

This role is for a senior developer with over six years of experience who has moved past the prototype phase and actually shipped AI features in production. You should be someone who enjoys the fast-moving intersection of Ruby on Rails and LLMs, focusing heavily on experimentation and real-world performance. **What makes it worth a look...** The biggest draw is the global remote flexibility paired with US-benchmarked pay regardless of your location. You also get 35 days of PTO and twice-yearly international retreats to places like Italy or Thailand. **You might be a good fit if you...** * Have built and scaled production AI features like RAG systems or agents. * Are highly proficient with Ruby on Rails and React. * Enjoy running A/B tests and AI evaluations to see what actually works. * Prefer a high-autonomy environment that values documentation and async work.