AI Engineer

📋 Description

• • As a senior AI Engineer at Ruby Labs Ltd., you will shape the company's AI infrastructure and drive production-ready LLM experiences, playing a critical role in advancing consumer-led products across health, education, and entertainment industries.
• • Your day-to-day responsibilities include designing advanced prompt engineering systems, implementing structured outputs and schemas, building evaluation pipelines with Langfuse, performing deep debugging of LLM chains, conducting AI A/B testing via OpenRouter, making data-driven deployment decisions, developing output scoring systems, and regularly re-evaluating and fine-tuning model performance.
• • You will join an innovative tech team at Ruby Labs, a leading company creating and operating consumer products, where modern stacks and data-driven decision-making are central to delivering high-quality AI features from experimentation to live production.
• • In this role, you will deepen your expertise in LLMs, observability, prompt engineering, and model evaluation while contributing to scalable AI systems that directly impact product quality, reliability, and cost efficiency in a fast-growing, remote-first environment.