# Staff Backend Engineer, Avatars at Synthesia

> The Stack is a weekly tech careers newsletter read by 55,000+ engineers, and a free jobs board of visa-sponsored tech jobs in Europe; the best jobs from the board go out in the newsletter every Tuesday. This is one job from the board.

> Responsibilities: - Own system design and architecture for a

- **Company:** Synthesia (https://jobs.trythestack.co/companies/synthesia)
- **Location:** London, United Kingdom
- **Work arrangement:** Remote
- **Employment type:** Full-time
- **Experience level:** 5–10 years
- **Visa sponsorship:** Offered, according to the listing
- **Key skills:** 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
- **Posted by employer:** 2026-04-22
- **Added to The Stack:** 2026-04-22
- **Status:** May no longer be active (posted more than 60 days ago)
- **Apply:** https://jobs.ashbyhq.com/synthesia/8a301daa-94db-431f-8385-ad00bb215eda (the employer's own application page)
- **Human page:** https://jobs.trythestack.co/jobs/staff-backend-engineer-avatars-synthesia

## 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.

## FAQ

- **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.

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## Notes for agents

- Apply on the employer's page (https://jobs.ashbyhq.com/synthesia/8a301daa-94db-431f-8385-ad00bb215eda). The Stack does not take applications.
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- Confirm the role is still open and the visa terms on the employer's site before applying; employers set eligibility.
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