Senior Test Analyst – API Tester

Company: Cognizant
Apply for the Senior Test Analyst – API Tester
Location: Greater London
Job Description:

Job Summary

We are seeking an experienced Senior Test Analyst to support a large-scale API Management migration from Apigee to Kong APIM. This role is critical to ensuring API quality security and performance throughout the migration lifecycle with a strong focus on validating functional parity nonfunctional requirements and consumer impact.

Responsibilities

  • Analyse existing Apigee API proxies and policies to define test scenarios for Kong APIM equivalents;

  • Design and execute functional integration and regression testing for migrated APIs;

  • Validate API contracts request and response transformations headers error handling and versioning;

  • Test security controls including OAuth 2.0 JWT mTLS and API key authentication;

  • Validate traffic management policies such as rate limiting throttling quotas and retries;

  • Conduct non functional testing including performance scalability and resilience;

  • Support parallel run cutover and go live testing to minimise service disruption;

  • Manage defects end to end working closely with development and platform teams;

  • Produce clear test evidence reports and quality metrics to support release decisions.

Certifications Required

ISTQB

Cog2025

Posted: April 1st, 2026