QA Test Engineer

QA Test Engineer
Northampton (2-3 days onsite)
Duration: 6 months initially
£400 per day inside IR35 - umbrella only

Key Responsibilities

• Perform manual and automated testing of REST APIs, decisioning components, and integration workflows.
• Conduct JSON schema validation, payload structure checks, and API contract verification.
• Review and validate API documentation using Swagger / OpenAPI specifications.
• Develop Python scripts for simulation, automation, and data validation.
• Prepare and maintain test plans, test cases, and use cases.
• Validate decision strategy outputs, API request/response mappings, and ODS data.
• Log and track defects in JIRA and prepare XRAY execution reports.
• Work closely with dev, BA, and strategy teams to ensure high?quality deliverables.
• Participate in Agile ceremonies and support performance/monitoring activities where required.

Core Skills

• Testing: Manual, REST API, Automation
• Technologies: JSON, JSON Schema, Swagger/OpenAPI
• Tools: Python, Karate, Excel, LoadRunner, Insomnia/Bruno
• CI/CD: GitLab, Jenkins
• Monitoring: Kibana, AppDynamics
• Concepts: SDLC, TDD, OAuth, Authentication/Authorization, Tokenization/Detokenization
• Good to have experience around Experian Strategy Manager validation, Experian Open Data Platform validation