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# Senior API Platform Engineer

- **Company:** Simplex Services (UK) Ltd
- **Location:** London, United Kingdom
- **Experience:** Expert
- **Contract:** Permanent contract
- **Skills:** Java (Programming Language), Amazon Web Services, User Authentication, Cloud Engineering, Continuous Delivery, Continuous Integration, DevOps, Lua (Scripting Language), OAuth, OpenID, Openid Connect, Software Engineering, Openapi, Apigee, Kubernetes, Information Technology, Api Design, Api Gateway, Restful APIs, Terraform, Api Management, Mulesoft, Golang, Programming Languages
- **Published:** November 13, 2026
- **Apply:** https://www.totaljobs.com/job/senior-platform-engineer/simplex-services-uk-ltd-job108308741

## About the Role

Formal training or certification on API Management Platform concepts and proficient advanced experience

Hands-on practical experience delivering system design, application development, testing, and operational stability

Advanced in one or more programming language(s) - Golang or LUA Script

Proficiency in automation and continuous delivery methods

In-depth knowledge of the financial services industry and their IT systems

Practical cloud native experience

Professional experience in API management technology e.g APIGEE, Kong, Mulesoft

Strong understand of OpenAPI Specification (OAS) for RESTful APIs

DevOps (CICD, Kubernetes, Terraform), · Programming languages: Advanced proficiency in one or more programming languages - Golang or Java.

· Cloud-native operations: Practical, hands-on cloud-native experience.

· Envoy: Professional experience with Envoy Proxy or Envoy Gateway.

· API design: Strong understanding of the OpenAPI Specification (OAS) for RESTful APIs.

· Authentication & authorization: Hands-on experience implementing authentication and authorization at the gateway, including OAuth 2.0, OpenID Connect (OIDC), JWT validation, and mutual TLS (mTLS).

· DevOps toolchain: Expertise across the DevOps toolchain, including CI/CD, Kubernetes, and Terraform., In-depth knowledge of the financial services industry and their IT systems

Practical cloud native experience

Professional experience in API management technology e.g APIGEE, Kong, Mulesoft

Strong understand of OpenAPI Specification (OAS) for RESTful APIs

DevOps (CICD, Kubernetes, Terraform), AWS (ECS, EKS, MSK)

Kong API Gateway

Golang programming language