Senior Backend Engineer - Go

About the role

A fast-growing European SaaS company building a cloud-based Quality Management System for the Life Sciences industry is looking for a Senior Backend Engineer. The engineering team is fully remote and spread across several countries, working in European time zones. This is a long-term B2B contract, full-time, with 100% remote work and overlap with CET hours.

Key responsibilities

• Own backend components from design to production in a small pod of 2-3 developers.
• Work with Product and QA to clarify requirements and business rules, and catch gaps before writing code.
• Model business domains: component boundaries, data models and interfaces (DDD where it makes sense).
• Write technical specifications and build REST APIs in Go.
• Write unit and integration tests derived from business requirements.
• Use AI-assisted development tools daily and take full responsibility for the quality of shipped code.
• Deploy, monitor and maintain services in production.
• Review code and mentor junior engineers.

Required profile

• 5+ years of hands-on backend development.
• Commercial Go experience, or strong Python/TypeScript with working Go knowledge and a willingness to work mainly in Go.
• Experience in domain modelling and distributed systems, and a good understanding of DDD.
• REST API design and asynchronous, event-driven messaging (retries, duplicate messages, partial failures).
• Strong data modelling and SQL: transactions, indexes, query performance.
• Containerised services on a cloud platform, CI/CD (GitHub Actions or similar), logging, tracing and monitoring.
• Secure coding practices and access control in a multi-tenant environment.
• Fluent written and spoken English and high autonomy.

Nice to have

• Experience in regulated domains (GxP, ISO 13485, FDA 21 CFR Part 11, audit trails).