Senior QA Engineer — Cloud/API Automation Lead

Synechron; Greater London; On-site; GBP 90,000 - 120,000; Full time

Job summary

Synechron seeks a highly experienced Senior QA Engineer to own QA for a cloud migration and integration program in the financial markets sector. The ideal candidate will excel in API automation using Postman and test Java, React, MongoDB, AWS, and CI/CD environments.

Key responsibilities include designing automated test suites, validating REST APIs, and ensuring data integrity across services while integrating tests into Jenkins pipelines and working in Docker/Kubernetes environments.

Qualifications

• 10+ years of QA/testing experience.
• Advanced hands-on experience with Postman API automation – mandatory.
• Strong experience with Postman collections, environments, variables, scripts, assertions, and chained requests.
• Newman and CI/CD test execution.
• REST APIs, HTTP methods, JSON, XML, and API security.
• Authentication and authorization testing.
• Java-based applications and microservices.
• React applications and UI regression testing.
• MongoDB or other NoSQL databases.
• Jenkins and CI/CD pipelines.
• Docker and Kubernetes.
• Proven experience in functional, integration, regression, and end-to-end testing.
• Strong defect management, test planning, reporting, and root-cause analysis skills.
• Excellent communication and stakeholder-management abilities.

Responsibilities

• Design, develop, and maintain automated API test suites using Postman and Newman.
• Test REST APIs, microservices, authentication, authorization, integrations, error handling, and data validation.
• Create and execute functional, integration, regression, system, and end-to-end test plans.
• Validate React-based applications and confirm that migrated systems preserve existing business functionality.
• Verify data flow and integrity across Java services, MongoDB, AWS, and integrated platforms.
• Integrate automated tests into Jenkins CI/CD pipelines.
• Execute and troubleshoot tests in Docker and Kubernetes environments.
• Enforce quality gates, test coverage, defect standards, and release-readiness criteria.
• Perform root-cause analysis and collaborate with developers, DevOps engineers, and product teams.
• Support resiliency, scalability, and performance testing for high-volume financial systems.

Tools

Postman

Newman

Jenkins

Docker

Kubernetes

React

Job description

Synechron seeks a highly experienced Senior QA Engineer to own QA for a cloud migration and integration program in the financial markets sector. The ideal candidate will excel in API automation using Postman and test Java, React, MongoDB, AWS, and CI/CD environments.

Key responsibilities include designing automated test suites, validating REST APIs, and ensuring data integrity across services while integrating tests into Jenkins pipelines and working in Docker/Kubernetes environments.