Senior Engineer

My client are looking for a UK-based remote Senior API Product Engineer

- Outside IR35

- 5 months initially (good chance of extension)

- Remote

Overview
You build and own APIs as products.
You focus on outcomes, not tickets.

You work hands-on across the full API lifecycle.
You follow platform standards while contributing to shared tooling and patterns.

This role suits someone who blends strong engineering with product ownership.

What you will do

Design and build APIs

Design APIs aligned to agreed standards, including naming, versioning and security, work with domain data models, build REST and event-driven APIs, keep consistency across platform patterns

Use and improve platform tooling

Use shared CI/CD pipelines, templates and reference architectures

• Follow established patterns
• Improve and contribute reusable API assets

Own the full API lifecycle

• Design, build, test, deploy and operate APIs
• Manage versioning strategy
• Maintain backward compatibility

Deliver integrations

• Integrate with internal systems and data platforms
• Handle data transformation across services
• Apply synchronous and asynchronous patterns
• Build for resilience, including retries, timeouts and fallback

Implement security

• Apply authentication, including OAuth2 and client credentials
• Follow platform-led authorisation models
• Align with central identity approaches

Enable observability

• Implement logging, metrics and tracing
• Support monitoring through shared platform tools
• Ensure services remain observable and supportable

Collaborate across teams

• Work with QA, platform engineering and product stakeholders
• Contribute to engineering standards and governance forums
• Align with wider delivery and architecture direction

Deliver in an agile environment

• Ship iteratively under tight timelines
• Manage cross-team dependencies
• Balance speed with compliance to standards

What you bring

Technical experience

• Strong API engineering across REST and event-driven systems
• Experience with cloud-native development, ideally Azure
• CI/CD and infrastructure as code awareness
• Strong understanding of integration patterns, sync and async
• Experience implementing OAuth2 security
• Familiarity with API management platforms

Platform mindset

• Comfortable working within guardrails
• Experience using shared tooling and frameworks
• Pragmatic approach to standardisation vs flexibility