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Tech Lead to take helm of LLM team (currently 3 engineers) and own architecture, training, and deployment of models that power core product. Role involves building massive-scale conversational intelligence for personalized human connection platform processing 80 million tokens per day. Position focuses on solving latency, throughput, and context management challenges at scale, with immediate impact on millions of users.
Job Responsibility:
Ship code & lead from the front: architect system and mentor team while spending significant time hands-on in codebase (Python/PyTorch)
Own core chat loop: optimize context windows, memory/RAG retrieval, and inference latency for seamless real-time experience
Own model lifecycle: drive strategy for SFT and RLHF/DPO, decide when to prompt, fine-tune, or architect new RAG pipeline
Manage data engine: oversee sourcing, labeling, and cleaning of diverse datasets to improve model steerability and multicultural performance
Architect high-precision moderation: design and train custom classifiers to detect and filter non-consensual or illegal content within explicit environment
Create nuanced, context-aware moderation systems beyond binary safe/unsafe flags
Requirements:
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 modern LLM stack (vLLM, HuggingFace, fine-tuning pipelines, eval frameworks)
Comfortable working with NSFW content and understanding technical rigor required to moderate it effectively without breaking user experience
Intuition for alignment: understanding how prompt conditioning, temperature, and sampling affect chatbot behavior
Doer mindset: ability to distinguish between perfect academic solution and shippable production solution
Owner mentality: obsess over metrics, regressions, and user experience
What we offer:
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 (also available for up to three family members)
Co-working space budget up to twice per month (35 EUR / 40 USD per visit)
Learning budget for professional growth: courses, books, conferences, events, or certifications
Company laptop provided + monitor budget up to $250 for workspace setup
Premium access to AI tools: ChatGPT, Cursor, Hugging Face, and others