Senior/Staff Software Engineer, Back End Leaning

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 centre of successful organisations.

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, 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 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.

Other important info: This is a remote role from an EU country, UK or Switzerland. The salary starts at EUR 100,000 / GBP 100,000 / CHF 100,000 base + stock option plan. This is full‑time employment only – no contractors possible – usually through OysterHR. Everyone at Synthesia gets 25 days of leave plus local holidays (no extra paid or unpaid leave possible). We only sponsor VISA if you are in the UK/EU country already and need support.