API Engineer - Envoy

Location: Glasgow - 5 days onsite
Contract: 6 months
Rate: £425 per day
IR35: Inside IR35
Experience: Banking/Financial Services essential

We are urgently looking for an experienced API Engineer with strong hands-on Envoy Proxy/Envoy Gateway experience to join a major banking technology programme in Glasgow.

This is a specialist API engineering role, so candidates must have proven practical experience with Envoy rather than simply general API, Kubernetes or DevOps exposure.

Key Responsibilities

Design, configure and support Envoy Proxy/Envoy Gateway within a cloud-native banking environment.
Configure and manage API routing, services, upstreams and gateway policies.
Troubleshoot complex API routing, connectivity and Proxy issues.
Implement API authentication and authorisation at gateway level.
Support secure and highly available API gateway architectures.
Work with engineering and platform teams on Kubernetes-based API infrastructure.
Manage API gateway configuration through controlled, automated deployment processes.
Contribute to CI/CD, infrastructure-as-code and cloud-native engineering practices.

Essential Experience

Strong hands-on Envoy Proxy or Envoy Gateway experience - essential
Strong Java or Golang development experience
Strong REST API experience
OpenAPI Specification (OAS) experience
API gateway authentication and authorisation
OAuth 2.0/OIDC
JWT validation
mTLS
Kubernetes/cloud-native environments
Terraform
CI/CD pipelines
Git-based development and configuration management
Strong troubleshooting and production support experience
Banking or financial services experience

Desirable

Envoy xDS/ADS
Envoy filters and extensions
ext_authz
API gateway security policies
AWS experience
Docker
GitOps/configuration-as-code
Kong or other API Gateway experience

Important

Strong Envoy experience is a key requirement for this position. We are not looking for candidates with only generic API Gateway, Kubernetes or DevOps experience.

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API Engineer - Envoy

Job Details