Senior/Staff Software Engineer - Conversational AI

ExpressVPN

Full-time Other-General
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Location
singapore, singapore, Singapore
Posted
June 24, 2026

Job Description

We're building production conversational AI β€” LLM agents that hold real conversations at scale, answer from a grounded knowledge base, and know their limits. We're looking for a hands-on Lead AI Engineer to own it end to end: the AI behavior, the infrastructure, and the full stack around it.

We're a small, focused team tackling a big problem β€” making AI that's accurate, grounded, and trustworthy in production. That means high ownership, fast decisions, and direct impact: what you build ships and runs live.

This is a builder-leader role. You write code, make the architecture calls, and set the technical direction for the team.

What you'll do
  • Own the AI system β€” LLM agents, retrieval-augmented generation (RAG), and guardrails. Drive answer quality, retrieval relevance, and safe behavior.
  • Debug and improve AI behavior β€” diagnose why a model hallucinated, mis‑routed, or responded incorrectly, and design evaluations (LLM-as-judge and others) to m...