Test Engineer interview questions

I've been a test engineer for six years, the last three in Oman. Started in manual QA at an Indian banking IT vendor, moved into test automation, and for the past three years I've been at an Omani digital-banking team doing end-to-end test design and execution. My split is roughly 50% test design and automation (writing and maintaining the suite), 30% exploratory testing of new features, and 20% test management work (planning cycles, coordinating with developers and product). Tools I use day-to-day: Selenium, Cypress, Postman for API tests, Jenkins for CI integration.

Start with the requirements and design docs. Identify scenarios: happy path, error handling, boundary conditions, accessibility, performance under realistic load, security. For each scenario decide test type: manual exploratory (high-value, hard-to-automate paths), automated functional (regression-worthy), API-level where the UI is unnecessary. Risk-based prioritisation: critical business flows get more coverage than nice-to-haves. Test plan is a living artefact; I update as I learn during testing. Final output: a coverage matrix mapping requirements to test cases.

Automate what's repetitive, regression-worthy, and stable. New features get exploratory manual testing first; automation comes when the feature stabilises. Critical business flows (login, payment, transfer) are always automated because they need verification on every release. UI tests are expensive to maintain; I push verification down to API level where possible (faster, more stable). I don't chase 100% automation; the Pareto rule applies: automate the 20% of tests that cover 80% of risk.

Define the targets first: response times at percentiles (p50, p95, p99), throughput, concurrent users. Set up a load environment that resembles production. Use JMeter or Gatling to ramp load gradually and identify the breaking points: where does latency degrade, what's the bottleneck (CPU, DB, network). I focus on realistic scenarios over peak-stress; sustained typical load tells you more about production behaviour than 10x burst tests. Results feed back to the team with specific recommendations: optimise this query, increase connection pool, etc. Performance testing is design feedback, not a gate.

Patience plus value demonstration. I avoid lecturing; I show value through bugs my tests catch on shared code. I pair with skeptical developers on their first integration test to remove the 'I don't know how' excuse. Over months trust builds and culture shifts. I've helped two teams move from 'tests are QA's problem' to developers writing their own tests; both took 6-9 months of consistent influence. Cultural change is incremental; you can't argue people into it.

For a senior test engineer role in Oman I'd target OMR 1,000 to 1,300 total package depending on the technology stack. Roles with heavy automation and modern CI/CD pay more than legacy manual-only roles. I'm on 60 days' notice. Beyond pay I'd value team maturity; QA in an org that genuinely values quality is fundamentally different from QA in an org where it's tolerated.