Senior AI Engineer

### Senior AI Engineer

*Remote — US only · Full-time*

Are you passionate about building AI products people actually use, serving millions of users? Do you want to help lead the AI engineering effort at this country's fastest-growing social media company that champions free speech? You'll be building AI-based features into a platform serving millions of users.

About the Role

You'll work directly with the platform architect and other developers to bring deep, hands-on LLM-stack expertise: you've built these systems before, you know where they break, and you know what "good" looks like in production.

The work is greenfield. You won't be maintaining someone else's pipeline — you'll be standing up the core AI infrastructure for a platform with millions of active users, and shaping the engineering practices around it as the team grows.

What We're Looking For

• 5+ years of backend engineering experience in a statically typed language (Go, Java, Kotlin, C#)
• You've shipped production LLM-backed features — retrieval-augmented generation, streaming responses, tool use — and lived with them after launch
• Hands-on experience with the LLM serving stack: routing across multiple model providers, failover, token streaming, and cost/usage metering
• Experience building retrieval systems: vector search, embedding pipelines, context assembly, and citation-backed answers
• You think in failure modes: hallucination, retrieval misses, provider outages, cost blowouts — and you build the instrumentation to catch them
• Pragmatic about evaluation — you know how to measure whether AI answers are actually good (relevance, safety, source quality) with simple, repeatable tests, not just academic benchmarks
• Strong API design instincts; comfortable owning a service end to end, from schema to deploy to on-call
• US-based and authorized to work in the United States

Nice to Have

• Go (strongly preferred)
• Python
• Experience with LLM ga