Senior Applied Research Engineer - Video Team

Salary: £52,000 - 92,000 per year

Requirements:

• Strong experience training deep learning models at scale
• Strong Python and PyTorch skills
• 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
• Nice to have: experience with video diffusion models
• Nice to have: experience in avatar or human-centric generation
• Nice to have: familiarity with world / interactive models
• Nice to have: experience with GANs or VAEs
• Nice to have: experience optimizing inference systems for production

Responsibilities:

• Own and execute end-to-end research and engineering projects from hypothesis to production impact
• Develop and scale latent video diffusion models tailored for human-centric video generation
• Design conditioning mechanisms to improve control over pose, emotion, script, and camera without sacrificing fidelity
• Advance distributed training strategies under real compute constraints
• Improve training stability at multi-node scale
• Design rigorous evaluation frameworks combining automated metrics and structured human evaluation
• Optimize inference for low latency, high resolution, and cost efficiency
• Run controlled ablations and experiments to drive high-signal modeling decisions
• Contribute to high engineering standards, including reproducibility, experiment tracking, CI/CD, and monitoring
• Move fast, run multiple hypotheses in parallel, identify signal early, and focus on outcomes

Technologies:

• AI
• CI/CD
• PyTorch
• Python
• NodeJS
• ARM
• Datadog
• Security
• Webflow

More:

We are Synthesia, the worlds leading AI video platform for business, used by over 90% of the Fortune 100. Founded in 2017 and headquartered in London, we have teams and offices across Europe and the US. Following our Series E funding round, we raised $200 million and our valuation stands at $4 billion, with total funding exceeding $530 million from leading investors. We build production-scale AI video products and foundation models that improve visual communication and enterprise skill development. We serve more than 50,000 customers, including major brands such as Heineken, Zoom, Xerox, and McDonalds, and we offer a highly technical, high-ownership environment with competitive compensation, stock options, bonus, 25 days of annual leave plus public holidays, and the option to work fully remote from Europe or in a hybrid setup with offices in London, Amsterdam, Zurich, and Munich.

last updated 34 week of 2026