Integration Engineer - API & Enterprise Systems (Contract)
Contract Length: 6 months
Location: UK - based anywhere / Remote
Sector: Retail Banking
We are seeking an experienced Integration Engineer to support the delivery and long‑term operation of critical enterprise integrations within a retail banking environment. This role is hands‑on and delivery‑focused, with responsibility transitioning into the Run phase as the integration subject matter expert.
Key Responsibilities
- Build and maintain secure, scalable API integrations using REST, OAuth2, webhooks, and asynchronous messaging patterns
- Design and implement integrations using Java and Spring Boot, developing robust integration adapters and services
- Integrate with enterprise platforms such as:
- Workday APIs (HCM and Talent modules)
- GitLab APIs (commit and activity data extraction)
- LMS / training platforms or similar SaaS systems
- Implement reliable data flows including:
- Data mapping and transformation
- Error handling and retry strategies
- Dead letter queue (DLQ) patterns
- Work with AWS messaging services such as SQS and EventBridge
- Support the transition from delivery into Run, acting as the integration SME and providing knowledge transfer to wider teams
- Collaborate closely with product, platform, and operations teams to ensure integrations are supportable and compliant
Required Experience
- 3+ years' experience delivering API‑led integrations
- Strong experience with REST APIs, OAuth2, webhooks, and asynchronous messaging
- Hands‑on Java / Spring Boot experience building integration services
- Enterprise system integration experience (Workday, GitLab, LMS, or similar)
- Strong understanding of integration resilience patterns (retry, DLQ, fault tolerance)
- Experience working in a regulated environment (retail banking or financial services preferred)
Guidant, Carbon60, Lorien & SRG - The Impellam Group Portfolio are acting as an Employment Business in relation to this vacancy.