Testing

Design and run statistically rigorous A/B tests and experiments.

Design and analyze A/B tests: sample size, test duration, and statistical significance for conversion experiments.

Test and evaluation harness for AI agents — scenario suites, deterministic replay, regression diffing, cost and latency budgets.

Idea to AI-generated prototype to customer validation to engineering handoff.

Generate API test suites from route definitions across frameworks: auth, input validation, contract, k6 load testing, mocking, and OpenAPI-driven generation.

Headcount and delivery-capacity planning — effective capacity from raw headcount, hire/contract/defer scenarios, and capacity-vs-commitment gap reports.

Cloud posture security across AWS, Azure, and GCP — IAM least privilege, public exposure, encryption, logging coverage, landing-zone guardrails.

Plan, write and measure ads inside AI assistants and AI search (ChatGPT Ads, Google AI Overviews and AI Mode, Microsoft Copilot).

Plan, sequence, and pressure-test internal announcements before they send.

Performance profiling for Node.js, Python, and Go: CPU flamegraphs, memory leak detection, bundle analysis, query optimization, and k6 load testing.

End-to-end testing with Playwright: test generation, page objects, locator strategy, flaky- test diagnosis, visual regression, and CI integration.

Systematic PR review with blast-radius analysis, security scanning, and breaking-change and test-coverage deltas.

Prompt engineering frameworks for building, testing, versioning, and evaluating prompts: chain-of-thought, few-shot, regression testing, and rubrics.

Browser-based QA combining Chrome MCP control with Python analysis tools.

Multi-agent source security audit with a coverage ledger, independently verified findings, and machine-checked records.

Testing for React/Next.js with Jest, React Testing Library, and Playwright.

Run development from an executable specification with traceable requirement IDs and merge-time coverage gates.

Applied statistics for business and product questions — test selection, assumption checks, power planning, effect sizes with intervals, multiplicity correction.

Implement Stripe integrations for SaaS billing: subscriptions, checkout, proration, usage- based billing, idempotent webhooks, customer portal, dunning, and…

Guide red-green-refactor TDD with test generation, coverage-gap analysis, and multi- framework support.

Reverse-engineer a design system from a live website (public URL or localhost).

Builds AdMob ads behind a port - banners, interstitials, rewarded, UMP consent then ATT, pacing, ADS_MODE test IDs.

Turns canvas taps, swipes, drags and aim into typed intents: one gesture module, hit-testing on the drawn layout.

Gates test-only code behind one literal TEST_ONLY switch: debug menu, debug link, simulated clock and offline.