API Developer

Partner / API Software Engineer (Contract – 12 Months)Location: Remote (UK-based)

Salary:

• £87,000 minimum – London-based candidates
• £78,000 minimum – Outside London

We’re working with a global technology organisation that operates at massive scale and partners with companies worldwide. They’re looking for an experienced Software Engineer with a strong focus on API design and partner integrations to join a global messaging-focused team.

This is a 12-month contract role with the potential to extend and the possibility of longer-term opportunities depending on project needs.

The Role:

This position sits at the intersection of engineering, product, and external partners. You’ll work on building, integrating, and validating APIs while acting as a technical bridge between internal teams and third-party partners.

The work is impactful, fast-paced, and highly collaborative, with a strong focus on quality, security, and regulatory requirements.

What You’ll Be Doing:

• Design, build, and maintain API-driven software solutions
• Integrate and support large, complex third-party APIs
• Independently understand, test, and validate API specifications
• Work closely with internal product and engineering teams
• Act as a technical point of contact for external partners
• Contribute technical insight to product and platform decisions
• Ensure solutions meet high standards for reliability, security, and compliance

What We’re Looking For:Essential:

• Strong experience designing and working with APIs
• Proven background in software development (backend / platform-focused)
• Ability to understand API specifications and test integrations independently
• Excellent communication skills and confidence working with external partners
• Experience operating in distributed or global teams

Nice to Have:

• Background in large-scale or high-growth tech environments
• Previous partner-facing, platform, or integration-focused roles

Experience

• Around 5+ years of commercial software engineering experience
• Strong engineering fundamentals preferred over specific languages or frameworks

Why Apply?

• Work on high-impact, large-scale systems
• Partner-facing role with real influence on product direction
• Fully remote within the UK
• Competitive salary aligned to location
• Exposure to complex technical and regulatory challenges