Back End Developer - API Integration - Restful API's - Greenfield AI
Location: Birmingham, England, United Kingdom (Hybrid)
Payment: InterCity Partners Ltd provided pay range: based on skills and experience. Direct message job poster for details.
One of the UK’s fastest‑growing SaaS scale‑ups invests heavily in a brand‑new API and AI integration platform. We are seeking a Backend Engineer to design and deliver services that power next‑generation AI features, customer products, and third‑party integrations.
You’ll work with a modern engineering team building RESTful APIs, cloud‑native services, and event‑driven components in a highly collaborative, product‑focused environment.
What you’ll be working on (API Development & Integration)
* Designing and implementing RESTful APIs exposing product capabilities to AI services and external partners.
* Building production‑grade APIs using C# .NET, SQL, and Azure cloud services.
* Implementing authentication/authorization using OAuth and modern security patterns.
* Creating clear, well‑documented APIs following OpenAPI/Swagger standards.
* Contributing to the build and maintenance of a developer portal for API consumers.
* Building RESTful APIs for web/mobile applications.
* Testing mindset — unit tests, integration tests, debugging.
Qualifications & Experience
* Strong experience in backend engineering with a focus on API development.
* Proficiency in C# .NET for building services and APIs.
* Solid SQL knowledge: querying, optimisation, relational schema.
* Understanding of REST conventions, status codes, error handling.
* Familiarity with OAuth, JWT, or API key authentication.
* Exposure to Azure and cloud deployment workflows.
* Strong problem‑solving and technical troubleshooting skills.
Apply directly or message me for a confidential chat — even if your CV isn’t fully up to date. Happy to walk you through the role, team, and growth path.
Seniority level: Mid‑Senior level. Employment type: Full‑time. Job function: Information Technology.
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