Senior Backend Engineer – AI Tooling & Platform

Synthesia Limited

Truro

Remote

GBP 120,000 - 180,000

Full time

4 days ago

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Job summary

Synthesia is the world’s leading AI video platform for business, used by over 90% of the Fortune 100. Founded in 2017, the company is headquartered in London, with offices and teams across Europe and the US.

The Developer Platform team builds internal tools and platform that improve velocity, quality and developer experience for Synthesia’s engineering teams. You will own the operational health of systems you build and shape the technical direction of your area.

Qualifications

7+ years of experience as a software engineer.
2–3 years in senior/staff level roles.
Hands-on experience building and operating developer platforms.
Led adoption of AI-powered developer tools across an engineering org.
Experience integrating third-party services into internal systems.
Experience operating in high-performing engineering environments.

Responsibilities

Own architectural decisions governing feature construction, release, and long-term support.
Mentor engineers and embed technical practices via code reviews and design partnerships.
Lead multi-quarter projects, breaking complex problems into milestones with iterative validation.
Operate with high autonomy: define success criteria, trade-offs, and escalation to leadership when needed.
Partner with leadership to shape roadmap and technical strategy.