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

8+ years of engineering experience, with significant portion dedicated to shipping ML/LLM features to millions of active users. 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: understanding prompt conditioning, temperature, and sampling effects. Doer Mindset: Value velocity and distinguish between academic and shippable production solutions. Owner Mindset: Obsess over metrics, regressions, and user experience long after code merge.

Act as a Player/Coach: Architect system and mentor team, while hands-on in codebase (Python/PyTorch). 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.