Performance Engineering & AI Quality Testing for product teams — load & stress audits, LLM evaluations, EU AI Act readiness, and maintainable test-automation frameworks.
📍 Croatia · 🔗 LinkedIn · 🌐 professional-qa-services.com
The same e-commerce journey (browse → add-to-cart → checkout), implemented across six tools (five backend load-testing tools plus a frontend Core Web Vitals one) — each a one-command Dockerized demo that spins up a mock backend, runs the test, and produces an HTML report.
| Tool | Language / DSL | SLOs as | Report | Repo |
|---|---|---|---|---|
| Apache JMeter | XML + Groovy | Assertions | HTML dashboard | ShopLite-load-tests |
| Grafana k6 | JavaScript | Thresholds | HTML report | ShopLite-load-tests-k6 |
| Locust | Python | Code-level checks | Built-in HTML | ShopLite-load-tests-locust |
| Gatling | Scala DSL | Assertions | HTML charts | ShopLite-load-tests-gatling-scala |
| Gatling | Java DSL | Assertions | HTML charts | ShopLite-load-tests-gatling-javaDSL |
| sitespeed.io | JavaScript | Budgets | HTML + Grafana | ShopLite-ui-perf |
| Observability | InfluxDB + Grafana | — | Live dashboards | ShopLite-observability |
Each repo also ships a documented test strategy — SLIs/SLOs, test cadence, environment constraints, and how performance testing fits into an Agile team's rituals.
💡 The script is the easy part. The real value is knowing what to test, shaping the load model, reading the results, and turning them into a go/no-go call — judgment a demo can't capture.
A small, readable BDD + Playwright end-to-end starter in TypeScript. Gherkin features sit on top of page objects backed by a typed route catalog, so the suite reads like product behavior while selectors and waits stay localized. It ships a bundled demo app, so the tests are green the moment you clone it — no external environment, no flaky shared staging.
- Layered design — features → steps → page objects → typed route catalog
- Network interception for deterministic failure-path tests · axe-core accessibility gating (WCAG 2.1 A/AA)
- Tag-based CI slicing, cross-browser (Chromium/Firefox/WebKit), traces · screenshots · video on failure
- CI-ready — GitHub Actions runs typecheck, lint, format & the suite on every PR; Dependabot keeps deps current
- Performance & load testing — JMeter · k6 · Locust · Gatling · sitespeed.io · Grafana + InfluxDB dashboards
- AI quality testing — LLM evaluations, red teaming, EU AI Act readiness
- Test automation — standing up maintainable E2E frameworks (Playwright + BDD, TypeScript): page-object architecture, network mocking, accessibility checks, CI-gated suites
- Test strategy — SLIs/SLOs, CI integration, reporting that non-engineers can read