Principal Research Engineer

Stack

Responsibilities

• ▹Own the end-to-end technical direction for offline video generation across pre-training and post-training
• ▹Partner with research leadership and team leads to define a unified long-term roadmap and drive execution
• ▹Identify the most critical technical gaps across the pipeline and unblock them (architecture, training stability, post-training alignment, cross-team coordination)
• ▹Increase the velocity at which research ships to product and improve research-to-production handoffs in partnership with PMs
• ▹Coach and elevate junior researchers and engineers toward senior technical thinking and execution
• ▹Help shape team structure and refine processes for high-velocity, cohesive execution

Requirements

• ▹Proven track record training large-scale video generation models from scratch, across multiple nodes, at the scale of millions of hours of data
• ▹Deep experience with post-training techniques at scale: RLHF, GRPO, DPO, with the judgment of when and how to apply them
• ▹Proven track record with data quality and willingness to question it
• ▹Ability to think strategically about multi-year research direction while executing hands-on at the frontier
• ▹Strong cross-functional influence without needing positional authority
• ▹Leadership style grounded in technical involvement - leads by example and communicates with clarity
• ▹Genuine hunger to unlock new capabilities and an obsession with shipping

Nice to have

• ▹Having owned a major model generation or capability jump end-to-end, from training runs to product deployment
• ▹Working across both pre-training and post-training stages on the same model family with accountability for both
• ▹Operating at scale: large distributed training runs, significant compute budgets, multi-million hour data pipelines
• ▹Applying alignment and fine-tuning techniques in a video or multimodal context, not just text
• ▹Experience with human feedback pipelines applied to generative video or audio
• ▹Leading or significantly influencing the technical direction of a research team while remaining hands-on

Soft skills