# Michal Zak — Senior Test Automation Engineer (Full Context)

> Freelance Software Test Engineer with 8+ years of experiences in Software Development

Canonical URL: https://www.zako05.dev/
Markdown URL: https://www.zako05.dev/index.md
JSON API URL: https://www.zako05.dev/api/cv.json
API Docs URL: https://www.zako05.dev/docs/
MCP Docs URL: https://www.zako05.dev/mcp/

## Contact & Social Profiles

- Name: Michal Zak
- Role: Senior Test Automation Engineer
- Email: zako05@gmail.com
- Phone: +421 903 647 310
- GitHub: https://github.com/zako05
- LinkedIn: https://linkedin.com/in/zakmichal
- Twitter: https://twitter.com/zak_michal
- Stack Overflow: https://stackoverflow.com/users/9822844/michalzak
- HackerRank: https://www.hackerrank.com/zako05
- TestAutomationU: https://testautomationu.applitools.com/me.html#zakmichal

## Career Profile

Over the past years, I've primarily focused on the technical aspects of testing.
This includes gaining a comprehensive understanding of how complex software systems interact
to design robust, scalable test automation solutions based on modern best practices.
I thrive on collaborating with colleagues to solve technical challenges,
constantly expanding my skills through continuous team learning.
With an open and communicative mindset,
my easy-going and friendly personality helps me bridge communication and align with team needs.
I continuously strive to deliver high-quality software under demanding technical conditions.

## Work Experience

### Senior Test Automation Engineer | Trezor, Prague (Aug 2025 - Jun 2026)

Trezor Suite (Open-source application for managing secure hardware wallets)
- Created Playwright E2E test suites focusing on core crypto processes like onboarding and passphrase handling
- Addressed CI test inconsistencies and Electron teardown delays in GitHub Actions pipelines
- Implemented automated testing for product analytics events and link validity checks

Tech Stack: TS, Node.js, React, React Native, Playwright, WebSocket, Python, Git (GitHub Actions)

### Senior Test Automation Engineer | Instea, Bratislava (Aug 2023 - Jun 2025)

US Quick Online 1.0 & 2.0 (B2B web-based app to manage clinical supply chain logistics)
- Created and managed performance tests using K6 in JavaScript for both projects

US Quick Dispatch Dashboard (Internal web-based app for dispatching international shipments)
  - Implemented end-to-end (E2E) and API tests with Playwright in JavaScript
  - Set up and optimized CI pipeline in Jenkins for efficient application testing

Tech Stack: JS, Node.js, React, GraphQL, Git (GitHub/Bitbucket), MS Playwright, Grafana Labs K6, Docker, Jenkins

### Senior Test Automation Engineer | Vectary, Bratislava (Jun 2023 - Jul 2023)

(Online 3D design and augmented reality platform)
- Developed and maintained end-to-end and API tests with Cypress.io
- Configured and optimized CI pipeline in Bitbucket for application testing

Tech Stack: JS/TS, GraphQL, Git (Bitbucket), Docker, Cypress.io

### Senior Test Automation Engineer | Vestberry, Bratislava (Jul 2021 - Dec 2022)

(B2B SaaS for VC portfolio management, providing data insights and automated reporting)
- Created automated testing framework with Cypress.io adhering to best practices
- Managed E2E/API tests using Cypress.io
- Set up and managed CI pipeline in GitLab for efficient application testing

Tech Stack: JS/TS, Node.js, React, Postgres, GraphQL, Git (GitLab), Docker, Cypress.io, Jest

### Software Test Engineer | Innovatrics, Bratislava (Feb 2019 - Oct 2020)

Fingera (B2B SaaS solution providing biometric access control and attendance management for SMBs)
- Manually tested the attendance system “Fingera” with expertise in biometric technologies for fingerprint and facial recognition
- Managed automated tests in Selenium WebDriver (Ruby, Cucumber + Capybara) for the “Fingera” attendance system incorporating biometric features like fingerprint and facial recognition
- Designed and implemented a test automation framework using Cypress.io for a novel cloud-based solution

Tech Stack: Ruby, Ruby on Rails, Postgres, React, Git (Bitbucket), Docker, Selenium WebDriver, Cucumber, Capybara, Cypress.io

### Software Test Engineer - Lead | Box+Dice, Melbourne (Jan 2017 - Oct 2018)

(B2B SaaS Real estate CRM for agents and agencies to manage contacts, listings, and sales)
- Managed a testing team to ensure timely delivery of bug-free products to client
- Implemented Agile values and principles to facilitate seamless integration of testing into development process
- Facilitated regular communication with testers through individual sessions, e.g. stand-ups, retrospectives, etc.
- Executed various test plans to ensure timely delivery of releases to clients with minimal bugs

Tech Stack: PHP, Ruby on Rails, Backbone.js, CoffeeScript, React Native, MariaDB, Postgres, Git (GitHub), Jenkins, Jasmine, Selenium WebDriver, Appium

## Technical Skills & Proficiency

- Exploratory Testing (100%)
- E2E Test Automation (90%)
- API Test Automation (60%)
- Playwright (80%)
- Git / GitHub (40%)
- JavaScript (60%)
- TypeScript (50%)
- React / Node.js / GraphQL (30%)
- CI/CD (Docker) (30%)
- Zsh / Vim (30%)

## Education

- Upper Intermediate, English — New Horizon College of English in New Zealand
- Ing., Informatics — Slovak University of Technology

## Certifications

- ISTQB Certified Tester Foundation Level, License 297

## Languages

- English: Professional working proficiency
- Czech: Full professional proficiency
- Slovak: Native proficiency

## Interests

- Test Automation & JS
- Running
- Traveling
- Splitboarding
- Ice Hockey