Tech Lead, LLM & Generative AI (Full Remote - UK)

Shipped AI at scale. 8+ years of engineering experience, with a significant portion dedicated to shipping ML/LLM features. Proficient in Python/PyTorch and comfortable with the modern LLM stack (vLLM, HuggingFace, fine-tuning pipelines, eval frameworks). Comfortable working with NSFW content and understanding technical rigor for moderation. Intuition for LLM alignment (prompt conditioning, temperature, sampling). Doer Mindset: Value velocity and shippable production solutions. Owner: Obsess over metrics, regressions, and user experience.

Act as a Player/Coach: Architect the system and mentor the team, spending significant time hands-on in the codebase. Own the core chat loop: Optimize context windows, memory/RAG retrieval, and inference latency. Drive strategy for SFT and RLHF/DPO. Manage the 'Data Engine': oversee sourcing, labeling, and cleaning of datasets. Design and train custom classifiers for content moderation within an explicit environment.