What We're Looking For We need someone who:

• Takes ownership: Owns post-training projects end-to-end, from customer requirements through delivery and evaluation.
• Thinks end-to-end: Can reason across data generation, training, alignment, and evaluation as a single system.
• Is pragmatic: Optimises for model quality and customer outcomes over publications or theory.
• Communicates clearly: Can translate between customer needs and internal technical teams, and push back when needed.

The Work

• Act as the technical owner for enterprise customer post-training engagements.
• Translate customer requirements into concrete post-training specifications and workflows.
• Design and execute data generation, filtering, and quality assessment processes.
• Run supervised fine-tuning, preference alignment, and reinforcement learning workflows.
• Design task-specific evaluations, interpret results, and feed learnings back into core post-training pipelines.

Must-have Desired Experience

• Hands-on experience with data generation and evaluation for LLM post-training.
• Experience training or fine-tuning models using SFT, preference alignment, and/or RL.
• Strong intuition for data quality and evaluation design.
• Familiarity with alignment or RL techniques beyond basic supervised fine-tuning.

Nice-to-have

• Experience contributing to shared or general-purpose post-training infrastructure.
• Prior exposure to customer-facing or applied ML delivery environments.
• Familiarity with alignment or RL techniques beyond basic supervised fine-tuning.

What Success Looks Like (Year One)

• Independently owns and delivers enterprise post-training projects with minimal oversight.
• Is trusted by customers as the technical owner, demonstrating strong judgment and delivery quality.
• Has made durable contributions to Liquid’s general-purpose post-training pipelines by feeding applied learnings back into baseline model development.

What We Offer

• Compensation: Competitive base salary with equity in a unicorn-stage company
• Health: We pay 100% of medical, dental, and vision premiums for employees and dependents
• Financial: 401(k) matching up to 4% of base pay
• Time Off: Unlimited PTO plus company-wide Refill Days throughout the year