About the Role
We are looking for a Senior QA Engineer (SDET) to support a critical payment gateway integration project involving PayArc. This role will focus on API testing, payment flow validation, automation, and end-to-end quality assurance across the transaction lifecycle.
You will work closely with engineering teams to ensure secure, reliable, and high-performance payment processing, while extending automated test coverage and supporting production rollout.
Key Responsibilitie
- sAPI & Payment Flow TestingValidate end-to-end payment workflows including authorization, capture, refund, void, and recurring billing
- Perform API testing for PayArc integrations using tools like Postman / REST clients
- Verify tokenization flows and ensure secure handling of payment data
- Test routing logic (new vs existing payment processors)
- Test Automation & Quality EngineeringExtend and maintain automated test suites for payment workflows and APIs
- Build API automation frameworks (using JavaScript, Java, or Python)
- Integrate automated tests into CI/CD pipelines for continuous validation
- Ensure strong regression coverage for all payment scenarios
- Functional & Edge Case ValidationTest 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 & ReconciliationValidate transaction data across APIs and databases
- Ensure accuracy in audit logs, payment records, and reconciliation flows
- Write and execute SQL queries for backend validation
- Performance & Reliability Testin
- gConduct 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 & MonitoringSupport production deployment validation and pilot rollout
- Monitor transaction success rates and error logs post-release
- Collaborate on issue triaging and quick resolution
.Requirement
- 5+ years of QA experience with strong focus on API and backend testing
- Hands-on experience with API testing tools (Postman, REST Assured, etc.)
- Experience in test automation using JavaScript, Java, or Python
- Strong understanding of payment systems / payment gateways (highly preferred)
- 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 Hav
- Experience with Stripe, PayArc, or similar payment gateways
- Experience with performance testing tools (JMeter, k6, etc.)
- Knowledge of PCI compliance basics and secure payment flows
- Exposure to Agile/Scrum methodologies
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