Full-Stack Engineer, Backend Leaning - Payments (Remote - UK, EU and US)

Priority hiring in the UK, EU and US; exceptional candidates in other countries are considered too. This is a backend-leaning full-stack engineering role on the payments team of an AI audio research and product company. The team owns how customers are billed, how usage is metered, and how pricing and payments work across self-serve and enterprise accounts. Because billing errors are immediately visible to customers and affect company revenue, the work demands precision. The role suits engineers who enjoy careful changes to live financial systems.

Responsibilities

• Build and maintain usage tracking so requests are metered accurately without adding noticeable latency.
• Lead migration of enterprise pricing and usage processing, including stream-processing services for usage events.
• Improve upgrade and payment flows, including payments across multiple legal entities and integrating new payment providers.
• Work with finance and tax teams on compliance, audit and reporting requirements.
• Support pricing and growth experiments with growth and product teams.
• Investigate complex billing issues by reconstructing customer journeys from logs and code, then fix the root cause.

Requirements

• Strong Python skills and a solid background in backend development.
• Familiarity with API design, cloud infrastructure, storage solutions and common system design patterns.
• Solid test design and security fundamentals.
• Careful, detail-oriented approach when changing production systems that handle money.
• Ability to learn a large existing codebase quickly and debug difficult production issues.
• Evidence of hard technical problems solved through past projects or open source contributions; no formal degree required.

Applicants must be based in: United Kingdom, Germany, France, Netherlands, Spain, Portugal, Poland, Ireland, Italy, Belgium, United States.