How to get an API testing
or SDET job in 2027

API testers verify the contracts that apps and services depend on: correct data and status codes, proper errors, authentication and permissions, and performance under load. SDETs — software development engineers in test — build the automation frameworks, write tests as code, run them in CI/CD and work with developers to make systems testable.

The pay gap between manual QA and automation is one of the largest in Indian tech. AmbitionBox shows typical QA engineer pay of ₹6.3–6.9 lakh in October 2026, with average pay up about 20% over two years, while SDETs typically earn ₹14.7–16.3 lakh and ₹21.2–23.4 lakh at 6–9 years.¹² In the US, software QA analysts and testers earned a median $104,300 in May 2025.³

Typical SDET pay in India (AmbitionBox, Oct 2026)

₹14.7–16.3 lakh

Typical QA engineer pay in India

₹6.3–6.9 lakh

SDETs at 6–9 years

₹21.2–23.4 lakh

US median, QA analysts and testers (BLS, May 2025)

$104,300

Table: The API testing and SDET hiring process — stages and what each tests (editorial summary)

Table: How testing hiring has changed (editorial summary)

• A public API under test — such as an open REST API or your own demo service.
• Real coverage — positive, negative, boundary, auth and permission tests.
• Schema validation — responses checked against a JSON schema.
• Data-driven tests — parameters and fixtures, not copy-pasted cases.
• CI pipeline — tests run on every push with a readable report.
• One contract or load test — to show breadth.

Recruiters filter on: SDET, QA Automation Engineer, API Test Engineer, Test Automation Engineer, QA Engineer; REST Assured, Postman, Newman, pytest, Playwright, Selenium, Cypress, Java, Python, JavaScript, TestNG, JUnit, Pact, k6, JMeter, Jenkins, GitHub Actions, ISTQB.

Write bullets with impact: "Built a REST Assured suite of 400 API tests running in CI in 6 minutes; caught an authorisation bug that exposed other users' statements before release."

Table: Example API test cases for a funds transfer endpoint (illustrative)

Eight cases, and five of them are not the happy path — which is exactly what interviewers want to see.

"How would you test a login API?"

Valid and invalid credentials, locked accounts, rate limiting, token expiry, response schema, no sensitive data in errors, and timing that doesn't reveal whether a user exists.

"What's the difference between 401 and 403?"

401: not authenticated. 403: authenticated but not permitted.

"What is contract testing and why use it?"

Consumers define the requests and responses they rely on; providers verify they still meet them. It catches breaking changes early without full end-to-end environments.

"How do you manage test data?"

Create data through APIs or fixtures per test, isolate tests, clean up, and avoid depending on shared, changing data.

"How do you make tests less flaky?"

Remove shared state, wait on conditions not sleeps, mock unstable dependencies and run tests independently.

"What would you include in a load test?"

Realistic scenarios and data, ramp-up, target throughput, latency percentiles and error thresholds, and monitoring of the system under test.

"How do you test idempotency?"

Send the same request with the same idempotency key twice and assert one effect and identical responses.

"Postman or code-based automation?"

Postman for exploration and quick collections; code-based frameworks for maintainable, version-controlled suites in CI.

Table: QA and SDET pay in India by experience (self-reported; indicative)

Table: Testing career path (editorial summary)

1. Weeks 1–2: HTTP and Postman — Methods, status codes, JSON, auth; explore a public API.
2. Weeks 3–4: A language — Java, Python or JavaScript basics for testers.
3. Weeks 5–6: A framework — REST Assured or pytest; data-driven tests and schemas.
4. Week 7: CI and reporting — GitHub Actions or Jenkins; readable reports.
5. Week 8: Contracts and load — One Pact test and one k6 script; take the REST API Testing Certification.
6. Weeks 9–10: Interview prep — Test-design cases and live automation tasks.

Related: API design skills, Python developer jobs and Java developer jobs. ISTQB certifications can help at screening in services firms.⁸

• Only happy-path tests.
• No permission or security cases.
• Brittle, copy-pasted test code.
• No CI — tests that only run on your laptop.
• Tool lists without a working framework.

Pay figures come from AmbitionBox's SDET and QA engineer pages (read October 2026) and the US Bureau of Labor Statistics. Tool references are REST Assured, Pact, Grafana k6, OWASP and ISTQB. Hiring stages and the history table are editorial summaries. Science of Apps publishes the free certification linked here. Last reviewed October 2026.

• SDET — software development engineer in test, who builds test automation in code.
• Negative test — a test that checks the system rejects invalid input correctly.
• Contract test — a test that verifies an API meets the expectations of its consumers.
• Load test — measuring performance under expected or peak traffic.
• Flaky test — a test that passes and fails without code changes.