Senior Backend Engineer, Enterprise

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 work on core enterprise platform systems, focusing on backend services that ensure Synthesia is secure, reliable, and scalable for our largest customers.

You will contribute to distributed backend systems and shared platform services, and be responsible for the safe and reliable operation of these systems in production.

You will have ownership of projects that span months and multiple teams, requiring you to break down complex, ambiguous problems into clear steps that can be delivered and validated iteratively.

You will work closely with product, security, legal, and infrastructure partners, and will be expected to translate business and regulatory requirements into scalable technical solutions.

You will evaluate your work through system health and reliability metrics, leveraging observability and monitoring to ensure systems meet performance, reliability, and compliance expectations.

You will consider the long-term direction of the platform, ensuring that the systems we build today can support future scale, enterprise requirements, and evolving regulatory needs.

What we're looking for

• At least seven (7) years of experience as a software engineer, with experience operating at a senior or staff level.
• You have experience building and operating backend systems at scale, ideally within platform or enterprise-focused teams.
• Strong expertise in backend development and system design. Experience across the stack is a plus, but this role is primarily backend-focused.
• Relevant engineering experience for teams building enterprise-grade systems; this may include areas such as security, compliance, data handling, access control, multi-tenant systems, or platform services.
• Experience owning systems in production, including observability, incident response, and reliability improvements.
• Ability to work across teams and functions, aligning with stakeholders and driving technical initiatives end-to-end.
• Strong alignment with building reliable, scalable systems that support long-term product and business goals.
• Previous experience leading projects or mentoring other engineers is a plus.

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. Here's why,

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.

You can find out more about these principles here.

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. Read stories from happy customers and what 1,200+ people say on G2.

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. Learn more about our AI Research Lab and the team behind.

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. Learn more about our commitments to AI Ethics, Safety & Security.

The hiring process

1. 30-40min call with our Technical Recruiter
2. 45min call with an Engineering Manager about your past projects
3. 90min Live Coding interview, a collaboration exercise with our Engineer (not Leetcode style)
4. 60min System Design, technical discussion usually about a real problem we had in production
5. 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 HERE. 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.
• This is full-time employment only - no contractors possible - usually through OysterHR or a local entity.
• Everyone at Synthesia gets 25 days of leave + local holidays.