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We are looking for a Tech Lead to take the helm of our LLM team (currently 3 engineers) and own the architecture, training, and deployment of the models that power our core product. This is a role for a builder. You won't just be managing Jira tickets; you will be writing production code, defining our alignment strategy, and shipping features used by millions of users globally.
Job Responsibility:
Ship Code & Lead from the Front: Architect the system and mentor the team, but spend significant time hands-on in the codebase (Python/PyTorch)
Own the core chat loop: Optimize context windows, memory/RAG retrieval, and inference latency
Own the Model Lifecycle: Drive our strategy for SFT (Supervised Fine-Tuning) and RLHF/DPO (Preference Optimization)
Manage the 'Data Engine': oversee the sourcing, labeling, and cleaning of diverse datasets
Architect High-Precision Moderation: design and train custom classifiers to detect and filter non-consensual or illegal content
Requirements:
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
Understand the physics of LLMs—how prompt conditioning, temperature, and sampling affect the 'soul' of a chatbot
Value velocity
can distinguish between a 'perfect' academic solution and a 'shippable' production solution
Obsess over metrics, regressions, and the user experience
What we offer:
Fully remote
4 weeks (20 working days) of PTO per year
Annual in-person meetup
Up to $200 per year for wellbeing expenses
Unlimited 1:1 sessions with psychologists and lifestyle experts through OpenUp
Co-Working Space Budget: 35 EUR / 40 USD per visit up to twice per month
Learning Budget: Dedicated funds to support your professional growth
Company laptop provided + monitor budget up to $250
Premium access to AI tools (ChatGPT, Cursor, Hugging Face)