AI Engineer

About Us

Ruby Labs is a leading tech company that creates and operates innovative consumer products. We offer a diverse range of opportunities across the health, education, and entertainment industries. Our innovative teams are driving the future of consumer‑led products, and we’re always looking for passionate individuals to join us. Learn more about our story at

About The Role

We are looking for a Senior AI Engineer (Node.js / Next.js / TypeScript) to join our team and help advance our AI infrastructure. You’ll work within a modern tech stack, focusing on model performance, reliability, and cost efficiency. You’ll take ownership of prompt systems, structured outputs, and LLM workflows built on LangChain or LlamaIndex. The role also covers observability and evaluation using Langfuse and AI gateways such as OpenRouter, with the goal of consistently improving model quality and operational efficiency. You’ll drive key AI features from early experimentat...