Lead Test Engineer

Job Description

We're hiring a QA Tester with 8+ years of experience to ensure the quality, reliability, and security of our payments gateway/platform and end-to-end payment flows (cards, wallets, 3DS, refunds, chargebacks). You'll test across API + UI, validate complex transaction states, and drive strong test coverage using Jira with Zephyr/Xray. The role also includes testing back-office/operations modules and 3rd-party applications that integrate with or connect to the payments platform.

Key Responsibilities

Own QA for payment flows: auth/capture/sale/void/refund, partial refunds, retries, idempotency, reconciliation, chargebacks.

EMV/contactless flows (where applicable), tip/adjustments, and terminal error/retry scenarios. Test terminal/POS payment applications and integrations (e.g., physical/virtual terminals), including device/app connectivity, transaction lifecycle (sale/void/refund), reversals, offline/online behavior, receipt flows, and reconciliation/settlement impacts. Familiar with ISO8583 and ISO20022.

Create, maintain, and execute test plans, test scenarios, and test cases in Jira using Zephyr or Xray.

Perform API testing (REST/JSON), validate schemas, error handling, timeouts, and edge cases.

Test operations modules (e.g., billing and costing, underwriting, etc...)

Validate 3rd-party applications/integrations connecting to the payments platform (merchant systems, PSP/acquirer connections, fraud/risk providers, reporting tools, webhooks/callback consumers).

Test 3DS2 flows, tokenization/vaulting behavior, wallet payments (Apple Pay/Google Pay) where applicable.

Perform database validation: transaction logs, ledger entries, reconciliation tables.

Build/maintain test automation (UI + API) and integrate into CI/CD pipelines.

Execute regression testing for releases/hotfixes; provide release readiness sign-off.

Conduct performance and reliability testing for peak loads, failover, and monitoring validation.

Ensure secure testing practices aligned with PCI DSS expectations (masking, logging, access control).

Partner with Engineering/Product/Operations to triage defects, document reproduction steps, and verify fixes.

Required Skills & Experience

5+ years in QA testing, with strong experience in payments/fintech/e-commerce domains.

Strong knowledge of SDLC/STLC, defect lifecycle, test design techniques, and risk-based testing.

Proven experience writing and managing test cases in Jira using Zephyr or Xray (required).

Strong understanding of payments: authorization, capture, settlement, refunds, chargebacks, webhooks, idempotency, retries.

Hands-on API testing (Postman) and automated API testing (e.g., Newman, RestAssured, PyTest, etc.).

UI automation experience with Selenium/Cypress/Playwright (as applicable).

Solid SQL skills for backend validation and reconciliation checks.

Experience testing back-office/admin/ops portals and workflows (access control, audit logs, reporting, dispute management).

Experience testing 3DS2, wallets (Apple Pay/Google Pay), and tokenization/vaulting flows.

Performance testing experience using JMeter/k6/Gatling. (Optional)

Familiarity with observability/log tools (Splunk/Datadog) and debugging via logs/traces.

Understanding of PCI DSS considerations and secure QA practices.

Excellent communication and documentation skills.