AI Platform Engineer, Applied AI at Circle (circle.so)

This role is built for a senior engineer with at least six years of experience who has moved from traditional search, NLP, or recommendation systems into the world of LLM production. You should be someone who cares more about the infrastructure of measurement and reliability than the research of training new models from scratch. **What makes it worth a look...** The major draw is the true global remote flexibility paired with US-benchmarked pay and 35 days of annual PTO. Being the first dedicated AI platform hire gives you immense influence over the tech stack, plus you get two fully paid international company retreats every year. **You might be a good fit if you...** * Have built and scaled RAG pipelines using Python but are willing to work in a Ruby on Rails codebase. * Know how to use evaluation frameworks like LangSmith or Braintrust to diagnose why an agent is failing. * Prefer building observability dashboards and data pipelines over fine-tuning model weights. * Can explain exactly how chunking strategies and re-ranking impact the final output for a user.