Senior Backend Engineer, AI Tooling & Developer Platform

Synthesia Limited; Greater London; Remote; GBP 110,000 - 180,000; Full time

Job summary

Synthesia Limited is hiring for a Developer Platform lead who will own architectural decisions across feature development, release safety, and long-term support. You will mentor engineers and partner closely with leadership to shape the roadmap and technical strategy.

You’ll build and own systems that improve velocity and quality for Synthesia’s engineering teams, including CI/CD, observability, and tooling that reduce cognitive load while maintaining security and reliability.

Qualifications

• 7+ years of experience as a software engineer.
• 2–3 years in senior/staff level roles.
• Proven hands-on experience building and operating developer platforms.

Responsibilities

• Own architectural decisions for features from design to deployment.
• Mentor engineers and embed technical practice via code reviews and design partnerships.
• Lead multi-quarter projects with milestones and iterative validation.
• Drive adoption of AI-powered developer tools across engineering teams.
• Ensure reliability, security, and user experience in internal systems.

Skills

CI/CD systems

Observability/metrics

Code quality automation

Developer tooling

Tools

APIs integration & third-party services

Job description

Synthesia Limited is hiring for a Developer Platform lead who will own architectural decisions across feature development, release safety, and long-term support. You will mentor engineers and partner closely with leadership to shape the roadmap and technical strategy.

You’ll build and own systems that improve velocity and quality for Synthesia’s engineering teams, including CI/CD, observability, and tooling that reduce cognitive load while maintaining security and reliability.