synthesia - Senior Research Engineer - Video Foundation Models (Pre - Training)
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Requirements
• Strong experience training deep learning models at scale • Hands-on experience with diffusion models (image domain required; video preferred) • Experience with large scale multi-GPU / multi-node training • Good understanding of distributed training (DDP, FSDP, DeepSpeed or similar) • Ability to design controlled experiments and interpret noisy results • Experience with video diffusion models • Experience in avatar or human-centric generation • Familiarity with world / interactive models • Experience optimizing inference systems for production • Python, PyTorch, CUDA • DeepSpeed, distributed training & inference • Sequence parallelism • AWS, SLURM, Docker • GitHub, CI/CD pipelines • You are research-driven but outcome-focused • You care about shipping, not just publishing • You can explore multiple ideas quickly and drop low-signal directions early • You communicate clearly and present results scientifically • You operate independently but collaborate actively across teams
Responsibilities
• You will own and execute end-to-end research and engineering projects, from hypothesis to production impact. This includes: • Developing and scaling latent video diffusion models tailored for human-centric video generation • Designing conditioning mechanisms to improve control (pose, emotion, script, camera) without sacrificing fidelity • Advancing distributed training strategies (DDP, FSDP, DeepSpeed, sequence parallelism) under real compute constraints • Improving training stability at multi-node scale • Designing rigorous evaluation frameworks combining automated metrics and structured human evaluation • Optimizing inference for low latency, high resolution, and cost efficiency • Running controlled ablations and experiments to drive high-signal modeling decisions • Contributing to high engineering standards: reproducibility, experiment tracking, CI/CD, monitoring • You will be expected to move fast, run multiple hypotheses in parallel, identify signal early, and focus on outcomes rather than exploration for its own sake.
Benefits
• Build production-scale video foundation models in a fast-growing Generative AI company • Work on human-centric video generation with real-world impact • Tackle hard problems in scaling, stability, and controllability • Influence the direction of next-generation synthetic human technology • Join a highly technical, high-ownership environment where your work ships • If you want to work on cutting-edge generative video models and see your research power real-world products, we’d love to talk. • At Synthesia we’re passionate about building, not talking, planning or politicising. We strive to hire the smartest, kindest and most unrelenting people and let them do their best work without distractions. Our work principles serve as our charter for how we make decisions, give feedback and structure our work to empower everyone to go as fast as possible. You can find out more about these principles here. https://www.notion.so/How-we-work-at-Synthesia-f794caa72f8446efb6be22b551ce0fa2?pvs=21 • SERVING 50,000+ CUSTOMERS (AND 50% OF THE FORTUNE 500) • We’re trusted by leading brands such as Heineken, Zoom, Xerox, McDonald’s and more. Read stories from happy customers https://www.synthesia.io/case-studies and what 1,200+ people say on G2 https://www.g2.com/products/synthesia/reviews#reviews. • PROPRIETARY AI TECHNOLOGY • Since 2017, we’ve been pioneering advancements in Generative AI. Our AI technology is built in-house, by a team of world-class AI researchers and engineers. Learn more about our AI Research Lab and the team behind. https://www.synthesia.io/research • AI SAFETY, ETHICS AND SECURITY • AI safety, ethics, and security are fundamental to our mission. While the full scope of Artificial Intelligence's impact on our society is still unfolding, our position is clear: People first. Always. Learn more about our commitments to AI Ethics, Safety & Security https://www.synthesia.io/ethics. • THE GOOD STUFF... • Competitive compensation (salary + stock options + bonus) • Fully remote from Europe or hybrid work setting with an office in London, Amsterdam, Zurich, Munich • 25 days of annual leave + public holidays • Great company culture with the option to join regular planning and socials at our hubs • + other benefits depending on your location • You can see more about Who we are and How we work here: https://www.synthesia.io/careers
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