Integration / API Engineer (.NET) - 12 Months Contract

About the role

We are seeking an expert integration engineer to design, build and operate secure APIs and enterprise integrations, including connections to national government platforms, payment gateways and public‑service systems, and to support AI project integration needs.

Key responsibilities

• Design and deliver secure internal and external integration patterns with documented API contracts.
• Lead technical changes for government integration platforms, payment gateways and public‑service platforms.
• Build and review .NET/C# APIs and integration components, managing compatibility, payload mappings and authentication.
• Resolve complex failures such as payment retries, duplicate callbacks, reconciliation, timeouts and external outages.
• Review mid‑level engineer work, coordinate with QA and DevOps, and define integration acceptance evidence.
• Deliver source, configuration, API documentation, operating guidance and knowledge transfer.

Required profile

• Relevant bachelor's degree (CS, information systems, software engineering) or equivalent.
• Substantial production experience designing APIs and enterprise integrations with hands‑on C#/.NET.

Required skills

• .NET
• C#
• API security
• Data mapping
• Payment processing
• AI integration