Senior Backend/Full Stack Engineer (Contract) - API Team

Senior Backend / Full Stack Engineer (Contract) – API Team | Outside IR35/B2B - Remote

Evantis is working with a fast-moving tech company that’s building out a new API engineering team to power the next generation of partner and customer integrations.

We’re looking for multiple engineers with strong backend experience in Node.js/ TypeScript and the ability to design, build, and deliver APIs that will serve as the foundation for future product expansion.

What you’ll be doing

• Designing and developing robust APIs and microservices in Node.js / TypeScript.
• Building plug-and-play integrations and widgets that make it easier for external partners to connect quickly.
• Improving the API layer — authentication, documentation, and developer experience.
• Working closely with internal product and engineering teams to deliver scalable, well-tested solutions.
• Experimenting with new technologies, including AI-driven features and integrations (ACP/AP2).
• Operating in a startup-style environment, where priorities evolve week to week, and delivery speed and quality both matter.

What we’re looking for

• Strong background in backend engineering, ideally 7+ years’ experience.
• Expert in Node.js, TypeScript, REST / GraphQL APIs, and related tooling.
• Comfortable working across cloud environments (AWS preferred) and CI/CD pipelines.
• Experience building integrations, SDKs, or lightweight plugins (WordPress, Shopify, etc.) is a plus.
• Autonomous, delivery-focused, and confident in taking ownership from idea to deployment.
• Curious about or experienced with AI-assisted development tools like Copilot or ChatGPT.

Details

• Location: Fully Remote (UK or EU timezone overlap)
• Start: ASAP
• Interviews are taking place ASAP

If this sounds of interest, please apply.