Lead Principal Research Engineer - Offline Video Gen

Synthesia; Philippines; Remote; PHP 7,542,000 - 11,314,000; Full time

Job summary

Synthesia is the world's leading AI video platform for business and the home of expressive avatar video generation. We are seeking a Principal Research Engineer to own the full technical stack for offline video generation, spanning pre-training and post-training, and to bridge research with product at scale.

You will partner with research leadership to define long-term strategy, tackle the hardest cross-cutting problems, and raise the bar for research-to-product handoffs, while mentoring junior

Qualifications

• Track record training large-scale video generation models from scratch.
• Experience with post-training techniques at scale: RLHF, GRPO, DPO.
• Ability to think strategically about multi-year research direction and execution.

Responsibilities

• Own end-to-end technical direction for offline video generation.
• Define a unified long-term roadmap with research leadership and team leads.
• Identify critical gaps across the video generation pipeline and unblock them.
• Increase Research-to-Product velocity and visibility in partnership with PMs.
• Coach and elevate junior researchers and engineers toward senior technical thinking.
• Help shape team structure and refine processes for high-velocity execution across research.

Skills

Large-scale training

Post-training RLHF

Cross-functional influence

Hands-on leadership

Job description

Synthesia is the world's leading AI video platform for business and the home of expressive avatar video generation. We are seeking a Principal Research Engineer to own the full technical stack for offline video generation, spanning pre-training and post-training, and to bridge research with product at scale.

You will partner with research leadership to define long-term strategy, tackle the hardest cross-cutting problems, and raise the bar for research-to-product handoffs, while mentoring junior