Senior Software Engineer, Accessibility in London

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. As AI continues to shape the way we live and work, Synthesia develops products to enhance visual communication and enterprise skill development, helping people work better and stay at the center of successful organizations.

Following our recent Series E funding round, where we raised $200 million, our valuation stands at $4 billion. Our total funding exceeds $530 million from premier investors including Accel, NVentures (Nvidia's VC arm), Kleiner Perkins, GV, and Evantic Capital, alongside the founders and operators of Stripe, Datadog, Miro, and Webflow.

About the role:

• You will drive execution and promote DS partnerships and deliverables: baseline audit, prioritise remediation, DS coverage, CI automation, and production monitoring.
• Ship technical fixes and lead cross-team remediation efforts.
• Partner with Design System, Product, Design, Legal, and External Audit provider to embed accessibility in workflows.
• Educate specific team members to drive accessibility standards in their org.
• Run user testing with assistive tech and integrate findings into product decisions.
• Design and operate AI-assisted tooling to scale audits and remediation (with human-in-the-loop guardrails).

You will consider the long-term direction of the team, making sure that we are developing the engineering capabilities that will allow us to stay ahead of the challenges we are likely to encounter in 6-12 months' time.

What we're looking for:

• At least five (5) years of experience as a software engineer, at least 3 on the senior/lead level.
• Proven track record driving accessibility for a large web application (measurable results).
• Deep frontend expertise (React/TS), Storybook, axe-core/pa11y, Playwright/Cypress.
• Knowledge of WCAG requirements.
• Strong cross-org influence and communication skills.
• Experience integrating accessibility into continuous Integration flows and Design System.
• Experience with LLM/AI tools applied to accessibility audits and remediation.

Nice to haves:

• Design skills (i.e. Figma) would be a nice to have.
• Experience with media/video accessibility (captions, audio descriptions, player controls).
• Prior experience building accessibility teams or programs.

Why join us?

We’re living the golden age of AI. The next decade will yield the next iconic companies, and we dare to say we have what it takes to become one.

Our culture:

At Synthesia we’re passionate about building, not talking, planning or politicising. We strive to hire the smartest, kindest and most unrelenting people and let them do their best work without distractions. Our work principles serve as our charter for how we make decisions, give feedback and structure our work to empower everyone to go as fast as possible.

Serving 50,000+ customers (and 50% of the Fortune 500). We’re trusted by leading brands such as Heineken, Zoom, Xerox, McDonald’s and more.

Proprietary AI technology:

Since 2017, we’ve been pioneering advancements in Generative AI. Our AI technology is built in-house, by a team of world-class AI researchers and engineers.

AI Safety, Ethics and Security:

AI safety, ethics, and security are fundamental to our mission. While the full scope of Artificial Intelligence's impact on our society is still unfolding, our position is clear: People first. Always.

The hiring process:

• 30-40min call with our Technical Recruiter
• 45min call with an Engineering Manager about your past projects
• 75min Live Coding interview, a collaboration exercise with our Engineer (not Leetcode style)
• 60min System Design, technical discussion usually about a real problem we had in production
• 45min call with leadership, focus on examples of collaboration, growth and going through details of your future team

You can find more details on what to expect and how to prepare. The process does not need to take long - we can be done in seven working days.

Other important info:

Our preference is for this role to be based either in-office or remote in the following locations: UK, Germany, Switzerland or Ireland. We may also be able to support remote workers in other locations across Europe subject to compliance and right to work checks.

The salary starts at EUR/GBP/CHF 120.000 base + stock option plan. This is full-time employment only - no contractors possible - usually through OysterHR.

Everyone at Synthesia gets 25 days of leave + local holidays. We only sponsor VISA if you are in the UK/EU country already and need support - we do not relocate people.