I'm Dušana, a Senior QA Engineer - but the last 3 years have looked more like engineering.

I architected end-to-end test infrastructure for a live Bitcoin wallet across web extension, mobile, and dapps - used by real people moving real money. I write React and React Native in production. I catch bugs before they become incidents.

I work best where QA and engineering blur - fast teams that care about what ships.

• Testing: Playwright, Maestro.dev, Newman, MailSlurp
• Frontend: React, React Native (Expo)
• Languages: TypeScript / JavaScript, Python
• CI/CD & Tooling: GitHub Actions, CircleCI, Docker, ESLint, Prettier

At Xverse (@secretkeylabs) I owned quality end-to-end for a security-critical blockchain product: designed test infrastructure, shipped features, mentored engineers, and helped maintain 99.9% uptime.

• 🌐 xverse-web-extension — Bitcoin Web3 Chrome extension wallet in TypeScript + React, supporting BTC, Stacks, Runes, Ordinals, and cross-chain swaps
• 🗂️ xverse portfolio web app — Full web product at portfolio.xverse.app covering Portfolio, Swap, Satsdaq, Earn (Stake BTC / Stack STX), Mint Runes, Lightning, and more
• 📱 xverse-app — The Xverse mobile wallet in React Native, available on iOS and Android
• 🧱 xverse-core — Core TypeScript library powering the Xverse wallet: API clients, transaction logic, wallet types, and multi-network support

• 📱 duolingo-maestro-e2e — Mobile E2E framework built with Maestro: modular onboarding subflows, debug wrapper flows, resilient assertions for A/B UI copy, hook-based teardown, and GitHub Actions smoke validation with artifacts.

• 🔐 ai-security-research — Mapping attack vectors introduced by AI-assisted development: secret detection, package hallucination, prompt injection, and more

• 🔐 lifi-api-test-suite - API test suite for LI.FI — Playwright + TypeScript, Postman, MCP integration, GitHub Actions CI

• 🐾 Adopt_me — A React pet adoption app, built while mastering hooks and custom hooks

• 📱 AwesomeProjectExpo — A React Native mobile app built with Expo

• ✅ udemy-cypress-course — Deep dive into Cypress: custom commands, plugins, tasks, and real-world test patterns

• 🔁 cypress-refresh — A light Cypress refresher + first steps with CircleCI

• 📬 examples — Multi-language email testing examples: Python, Go, PHP, JS (Cypress + WebdriverIO + CodeceptJS)

• 6+ years in QA, 3+ years operating as a QA engineer in all but name
• 🧪 I believe good tests are just as important as good code — clear, reliable, and easy to maintain
• 🌍 Contributor to open source via Zero to Mastery projects
• 🧱 I like building things that are simple, useful, and easy to understand
• 📚 Curently reading The Effective Software Engineer by Addy Osmani
• 🎧 Canceling all the noise in tech with @pragmaticengineer