About the job

Sequence is hiring a Senior Product Engineer (Backend) in London to help build and scale its AI-powered revenue platform used by modern finance teams to manage quoting, billing, and revenue recognition. The company processes more than $1 billion in annual invoice volume and is growing rapidly after securing $20M Series A funding. In this role, engineers will design and develop reliable backend systems, build AI-powered workflows, and improve billing infrastructure that supports high-growth technology companies. Responsibilities include creating scalable distributed systems, designing approval workflow automation, building intelligent collections agents, and ensuring the reliability of revenue-critical infrastructure. Engineers will work with technologies such as Kotlin, Spring Boot, PostgreSQL, BigQuery, Google Cloud, Terraform, React, and TypeScript. The role requires strong experience in backend development, distributed systems, and scalable infrastructure along with the ability to solve complex engineering problems in a fast-moving startup environment. Sequence offers a competitive salary between £115,000 and £130,000, meaningful equity options, hybrid work in London, and visa sponsorship for eligible international candidates.