Staff Backend Engineer, Avatars at Synthesia

✨ The Stack take on this Synthesia job

• 🏢 Synthesia has 7 jobs here, 7 with visa sponsorship see all
• 🛂 Skilled Worker visa. Standard minimum salary: £41,700 a year guide
• 💡 No salary shown. Ask Synthesia if it is above the minimum.

Updated 2026-11-05, from our data and official sources.

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About the role

Responsibilities:
- Own system design and architecture for avatar and generative-media services, with focus on scalability, reliability, and low latency.
- Design data models and APIs to support avatar versions, personalization, sharing, and integration with voice/video pipelines.
- Collaborate with product, design, and R&D to align technical decisions with user needs and model capabilities.
- Drive long-term platform extensibility and maintainability; enforce code quality and technical standards.
- Optimize performance on critical video-generation paths and lead incident response and reliability improvements.
- Mentor engineers and act as a technical steward across multiple teams.

Requirements:
- Significant experience as a senior/staff backend engineer with strong system design and data modelling skills.
- Proven track record building product-facing, scalable backend systems that trade off speed, reliability, and maintainability.
- Experience integrating complex pipelines (media, voice, ML model outputs) and designing APIs for cross-team consumption.
- Familiarity with observability, performance tuning, and production reliability practices.
- Strong communication and ability to influence cross-functional roadmaps and technical direction.

Responsibilities

You will own the system design and architecture for core avatar and generative media systems to ensure scalability and reliability. You will collaborate with product, design, and R&D teams to integrate model capabilities and maintain high standards for the platform's codebase.

Requirements

You must have significant experience as a software engineer at a senior or staff level with deep expertise in backend architecture and system design. You should be comfortable operating with ambiguity and possess strong product awareness to connect technical decisions to business outcomes.

Key skills

• System design — in 199 other listings on The Stack
• Data modelling — in 24 other listings on The Stack
• Backend systems — in 32 other listings on The Stack
• Architecture — in 22 other listings on The Stack
• Scalability — in 70 other listings on The Stack
• Reliability — in 15 other listings on The Stack
• Latency optimization — in 3 other listings on The Stack
• Generative AI — in 58 other listings on The Stack
• Product-facing systems
• Code quality
• Technical stewardship
• API integration
• Performance tuning
• Cross-team collaboration

On The Stack (as of 2026-11-05)

• Synthesia has 6 other listings on The Stack, 6 of them marked as offering visa sponsorship.
• 214 visa-sponsored jobs in the United Kingdom on The Stack, posted in the last 60 days.
• 68 visa-sponsored backend engineer jobs in Europe on The Stack, posted in the last 60 days.

Frequently asked questions about Synthesia

Is this Staff Backend Engineer, Avatars role still open?

It was posted on 2026-04-22. Listings more than 30 days old may no longer be active, so check Synthesia's site before applying.

Does Synthesia offer visa sponsorship?

This listing is marked as offering visa sponsorship. Eligibility rules are set by the employer, so check the details on Synthesia's site.

Where is this role located?

The listing gives the location as London, United Kingdom. It is marked remote.

What skills does this role ask for?

The listing names: System design, Data modelling, Backend systems, Architecture, Scalability, Reliability, Latency optimization, Generative AI, Product-facing systems, Code quality, Technical stewardship, API integration, Performance tuning, Cross-team collaboration.