Senior QA Engineer - Automation - Contractual Role

About us:

Working at Tech Holding isn’t just a job, it’s an opportunity to be a part of something bigger. We are a full-service consulting firm that was founded on the premise of delivering predictable outcomes and high-quality solutions to our clients.  Our founders and team members have industry experience and have held senior positions in a wide variety of companies – from emerging startups to large Fortune 50 firms – and we have taken our combined experiences and developed a unique approach that is supported by the principles of deep expertise, integrity, transparency, and dependability.

About the Role

We are looking for a Senior QA Engineer (SDET) to support a critical automation projects. This role will focus on API testing, automation, and end-to-end quality assurance across the transaction lifecycle.

Role: Contratual role

Exp: 5 yrs

Key Responsibilities

• API Testing

  • Perform API testing for integrations using tools like Postman / REST clients.
  • Test routing logic.

• Test Automation & Quality Engineering

  • Extend and maintain automated test suites workflows and APIs.
  • Build API automation frameworks (using JavaScript, Java, or Python).
  • Integrate automated tests into CI/CD pipelines for continuous validation.

• Functional & Edge Case Validation

  • Test success, failure, and edge-case scenarios (timeouts, retries, duplicate transactions).
  • Validate idempotency and error handling mechanisms.
  • Perform exploratory and manual testing for complex workflows.

• Data Validation & Reconciliation

  • Validate transaction data across APIs and databases.
  • Write and execute SQL queries for backend validation.

• Performance & Reliability Testing

  • Conduct basic load and performance testing for payment APIs.
  • Validate system behaviour  under high transaction volume.
  • Monitor and report latency, failure rates, and retries.

• Production Rollout & Monitoring

  • Support production deployment validation and pilot rollout.
  • Monitor transaction success rates and error logs post-release.
  • Collaborate on issue triaging and quick resolution.

Requirements

• 5+ years of QA experience with strong focus on API and backend testing.
• Hands-on experience with API testing tools (Postman, REST Assured, etc.).
• Good to have experience with Playwright
• Experience in test automation using JavaScript, Java, or Python.
• Experience with SQL and database validation.
• Knowledge of CI/CD pipelines and automation integration.
• Understanding of HTTP protocols, REST APIs, and JSON.
• Familiarity with error handling, retries, and distributed system behaviors.
• Strong analytical, debugging, and problem-solving skills.

Good to Have

• Experience with performance testing tools (JMeter, k6, etc.).
• Exposure to Agile/Scrum methodologies.

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