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

8+ years of engineering experience, with a 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 understand the technical rigor required to moderate it effectively. Intuition for LLM alignment and understanding how prompt conditioning, temperature, and sampling affect chatbot behavior. Doer Mindset: Value velocity and distinguish between academic and shippable production solutions. Owner Mindset: Obsess over metrics, regressions, and user experience.

Act as a Player/Coach: Architect the system and mentor the team, while spending significant time hands-on in the codebase (Python/PyTorch). Own the core chat loop: Optimize context windows, memory/RAG retrieval, and inference latency. Drive strategy for SFT (Supervised Fine-Tuning) and RLHF/DPO (Preference Optimization). Manage the 'Data Engine': oversee dataset sourcing, labeling, and cleaning. Design and train custom classifiers to detect and filter non-consensual or illegal content within an explicit environment. Create nuanced, context-aware moderation systems.