Mario Blažek
Chief Technology Officer at Freelance | Self Employed
Zagreb, Croatia
Summary
👤
Senior🎓
Top SchoolMario Blažek is a seasoned engineering leader and CTO based in Zagreb with 11+ years building scalable backend systems, primarily in PHP and Symfony. He combines hands-on expertise in eZ Publish/Platform and test automation with strategic leadership, having progressed from senior developer roles into team lead and CTO positions at Four of Them and other agencies. A pragmatic DevOps-minded architect, he frequently contributes to high-profile open-source projects like PHPUnit and the eZ Platform kernel, improving test coverage and forward compatibility. He brings a full-stack operational perspective rooted in earlier Linux administration and networking certifications (CCNA/SCJP), which helps him bridge development, QA, and infrastructure. Colleagues rely on him for thoughtful refactors and reliable platform upgrades that balance legacy constraints with modern practices.
11 years of coding experience
12 years of employment as a software developer
SCJP, Java programming, SCJP, Java programming at NetAkademija - Java programmingBachelor's degree, Software Engineering, Bachelor's degree, Software Engineering at Tehničko veleučilište u ZagrebuCisco Network Academy, Network administration (CCNA), Cisco Network Academy, Network administration (CCNA) at NetAkademija - Cisco Network AcademyComputer engineer, Computer engineering, Computer engineer, Computer engineering at Zeljeznicka tehnicka skola u Zagrebu
English, German
Stackoverflow
1reputation
0reached
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Github Skills (16)
phpunit10
testing10
unit-testing10
testing-library10
php10
mocks10
mstest10
ui-testing10
teste10
ezplatform10
mocking10
symfony10
symfony-ux10
test-automation10
namespaces9
Programming languages (8)
Github contributions (5)
ezsystems/ezpublish-kernel
Jun 2017 - Jul 2019
Kernel (Repository, MVC layer, REST) for eZ Platform
Role in this project:
Back-end Developer
Back-end DeveloperContributions:23 commits, 28 PRs, 76 comments in 2 years 1 month
Contributions summary:Mario primarily focused on refactoring and improving the eZ Platform kernel, specifically addressing content-based matchers by checking the instance of `ContentValueView` rather than `ContentView`. They updated the PHPUnit testing framework for forward compatibility, including tests to use namespaced variants of TestCase and adapting to PHPUnit v5. Additionally, the user updated and refactored several tests within the project, updating the code with class constants and using createMock.
ezplatformkernelmvcrest
sebastianbergmann/phpunit-mock-objects
Sep 2017 - Oct 2017
Mock Object library for PHPUnit
Role in this project:Back-end Developer & Test Automation Engineer
Back-end Developer & Test Automation EngineerContributions:8 commits, 1 PR, 7 comments in 2 days
Contributions summary:Mario primarily contributed to the PHPUnit mock object library, focusing on updating and expanding testing functionality. They updated existing test cases, added new tests for different functionalities like invocations, and incorporated namespace usage throughout the project. The user also addressed various aspects of the project by refactoring, adding new features, and enhancing testing coverage for several core modules.
phpunit
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