Backend Developer

London - Hybrid (2 days in the office pw)

£55,000-£75,000

Java, .Net, Python, Node, Go, SDK's

We’re working with a growing product agency based in Central London, who are looking for a backend developer, who has experience with a couple of backend languages. The business have projects in Java, .Net, Python, Node & Golang currently. To be considered for the role you must have experience in at least 2 backend languages.

This Backend Developer role will see you shape the SDK Factory: templates, generation workflow, quality gates, and release mechanics - then help hand it over through clear documentation and knowledge transfer.

This is a role for someone who enjoys breadth and ownership: context-switching across languages, improving pipelines, and collaborating across teams.

What you’ll do

• SDK templates & generation: Design reusable, idiomatic templates and code-gen configs for multiple languages (initially Java, .NET, Python; later TypeScript/Go).
• Spec readiness: Review/normalise OpenAPI specs; spot breaking changes; propose safe defaults.
• CI/CD & quality gates: Implement build matrices and release gates (lint/format, tests/coverage, SBOM, artifact signing, SemVer tagging).
• Packaging & publishing: Ship to artifact repos (e.g., Maven/NuGet/PyPI via Nexus/Artifactory) with signed, traceable releases and clear release notes.
• Portal integration: Expose SDKs via a simple download/manifest endpoint and ensure links & version badges remain stable.

To be considered for this role you must be within a commutable distance to London and have full right to work in the UK.