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

8+ years of engineering experience, with significant portion dedicated to shipping ML/LLM features to millions of active users. Proficient in Python/PyTorch. Comfortable with the modern LLM stack (vLLM, HuggingFace, fine-tuning pipelines, eval frameworks). Comfortable working with NSFW content and understanding the technical rigor required to moderate it effectively. Intuition for Alignment: Understands how prompt conditioning, temperature, and sampling affect chatbot behavior. Doer Mindset: Values velocity and can distinguish between academic and shippable production solutions. Owner Mindset: Obsesses over metrics, regressions, and user experience.

Act as a Player/Coach: Architect system and mentor team, spending significant time 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 diverse datasets. Design and train custom classifiers to detect and filter non-consensual or illegal content within an explicit environment.