Lukáš Kroček

Frontend Developer specializing in React, JavaScript, TypeScript, BrightScript and AI-assisted development.

Professional experience

• Senior Frontend Developer at Inphinity (2025-12–present) - Development and maintenance of frontend extensions for the Qlik BI platform. Focused on performance optimization of a new feature and maintaining code quality through unit tests and component documentation. Technologies: React, Angular, TypeScript, JavaScript, Webpack, Jest, Selenide, WebWorker, PostMessage, Storybook, MS Windows, AI Code Assist, TeamCity, Jira, Git, HTML5, CSS3, REST API.
• Unemployed — Personal Development at Self-employed (2025-08–2025-12) - A browser-based strategy game built with Vibe Coding methodology. Features real-time game loop, state management, and responsive UI. Technologies: React, Redux, MS Windows, TypeScript, JavaScript, Jest, WebRTC, WebWorker, Canvas, Vite.
• Unemployed — Personal Development at Self-employed (2025-08–2025-12) - A digital, interactive CV built as a living portfolio showcase with technology exploration and Storybook component documentation. Technologies: React, TypeScript, JavaScript, MS Windows, Vite, Storybook, Tailwind CSS, Git.
• Frontend Web Developer at Suitest (2024-03–2025-07) - Day-to-day maintenance, bug fixing, and continuous improvements of the existing frontend application and presentation websites. Technologies: React, Redux, AngularJS:1.7, JavaScript, TypeScript, Webpack, WebSockets, MS Windows, Jira, Git, HTML5, CSS3.
• Frontend Web Developer at Suitest (2024-12–2025-07) - Led the migration of the build toolchain from Webpack 4 to 5 while managing the React, Redux, AngularJS, and TypeScript stack. Increased unit test coverage using Jest and Mocha and conducted rigorous code reviews. Technologies: React, Redux, AngularJS:1.7, WebSockets, JavaScript, MS Windows, TypeScript, Webpack, Jest, Mocha, Storybook, Jira, Git.
• Platform Integration Specialist at Suitest (2019-08–2024-03) - Developed and maintained a core component library for Roku and adapted the Suitest instrumentation library for the platform. Full rewrite in BrightScript for ARM devices with strong emphasis on performance and customer support. Technologies: BrightScript, Roku, WebSockets, Performance optimization, Git, E2E Testing, MS Windows, Unit Tests, Grunt, Jira.
• Platform Integration Specialist at Suitest (2014-06–2024-03) - Engineered and implemented a JavaScript library for end-to-end testing across HTML-based OTT platforms. Used advanced browser communication patterns and designed an HTTP storage fallback for constrained devices without standard storage APIs. Technologies: JavaScript, Socket.io, WebSockets, WebRTC, REST API, WebWorker, PostMessage, WireShark, RaspberryPi I/O, Node.js, Arduino, CheatEngine, FileSystem/Storage API, Samsung SmartTv, HbbTV, HTML5, HTML-based, CSS3, Freeview Play, ATSC 3.0, Android, iOS, Xfinity, Fire TV, LG Smart Tv, Mocha, VirtualBox, Debian, Playstation 4/5, Xbox One, E2E Testing, Unit Tests, Webpack, MS Windows, Jira, Git.
• JavaScript Developer at mineus)(, s.r.o. (2014-02–2019-06) - Continued development of the SwissTXT application for the HbbTV platform. The application went through major refactoring and architectural changes to adopt React and Redux for interactive broadcast experiences. Technologies: React, Redux, JavaScript, TypeScript, MS Windows, HbbTV, CSS3, HTML-based, xHTML, Unit Tests, Webpack, Jira, Git.
• JavaScript Developer at mineus)(, s.r.o. (2013-04–2014-06) - Built HTML WebView ePaper applications for touch-based devices (Android and iOS tablets and phones) for clients Tagesspiegel, PCWelt, and MacWelt. Technologies: JavaScript, xHTML, HTML-based, CSS3, Grunt, MS Windows, Jira, Git.
• JavaScript Developer at mineus)(, s.r.o. (2013-02–2014-08) - Created HbbTV applications for major broadcasters featuring EPG, news feeds, and video-on-demand galleries. Technologies: JavaScript, xHTML, HTML-based, SmartTv, HbbTV, MS Windows, REST API, Git, GitLab, Less, Grunt.
• JavaScript Developer at mineus)(, s.r.o. (2012-10–2013-06) - Contributed to the development of the Maxdome mobile video-on-demand application for smartphones and tablets. Technologies: JavaScript, REST API, Git, HTML-based, GitLab, MS Windows, HTML5, CSS3, Less, Grunt.
• JavaScript Developer at mineus)(, s.r.o. (2013-06–2013-10) - Developed a real-time multiplayer Pong game using Socket.io for Smart TV platforms with remote control input. Technologies: JavaScript, Socket.io, HTML-based, MongoDB, HTML5, CSS3, Git, MS Windows, GitLab, Nginx, VirtualBox, Less, Express, Node.js.
• Web Developer at Aaron Group, s.r.o. (2011-02–2012-08) - Managed and built websites driven by a proprietary internal CMS for enterprise clients including aarongroup.com, cat.com, csa.cz, and altron.cz. Technologies: JavaScript, xHTML, CSS3, XML, MS Windows, XSLT, jQuery.
• Web Developer at Aaron Group, s.r.o. (2011-09–2012-09) - Developed and maintained the customer care portal for Vodafone Czech Republic using the Yahoo! User Interface library and Oracle RightNow CX. Technologies: YUI, JSON, REST API, JavaScript, MS Windows, HTML5, CSS3.
• Web Developer at Aaron Group, s.r.o. (2011-02–2012-08) - Maintained and managed the main flight booking engine used by major travel agencies and airlines including czechairlines.cz, letuska.cz, and cedok.cz. Technologies: PHP, MySQL, XSLT, xHTML, MS Windows, XML, XHR, CSS3, Bugzilla, SVN, Varnish, Nginx, REST API, jQuery.
• Web Developer at Internet Info (2007-09–2008-09) - Maintained and developed features across the core magazine portfolio: root.cz, lupa.cz, mesec.cz, and slunecnice.cz. Version control with HG and SVN, bug tracking with Bugzilla. Technologies: PHP, MySQL, CSS3, HTML4, Bugzilla, Ubuntu, HG mercurial, jQuery.
• Web Developer at Internet Info (2008-09–2009-09) - Built a video aggregator platform that collected and categorised video content from multiple sources for the Czech market. Technologies: PHP, MySQL, CSS3, HTML4, JavaScript, Bugzilla, Ubuntu, HG, jQuery.
• Web Developer at Internet Info (2009-09–2010-03) - Led the full visual and structural redesign of podnikatel.cz, the leading Czech business information portal. Technologies: PHP, MySQL, CSS3, HTML4, JavaScript, Bugzilla, Ubuntu, HG, jQuery, Google Maps API.
• Web Developer at Internet Info (2010-03–2010-06) - Feature development and maintenance for zdrojak.cz, a developer-focused technology magazine. Technologies: PHP, MySQL, CSS3, xHTML, JavaScript, Bugzilla, SVN, Ubuntu, jQuery.
• Web Developer at Internet Info (2010-03–2011-01) - Architected and led the migration of the shared magazine platform to an object-oriented PHP 5 model using the Nette Framework. Delivered significant MySQL performance improvements across the high-traffic portfolio. Completed an advanced MySQL course led by Czech database expert Jakub Vrana. Technologies: PHP, MySQL, CSS3, xHTML, Ubuntu, JavaScript, Bugzilla, SVN.
• Part-time Network Technician at Kroknet (2005–2007) - Hands-on installation and measurement of WiFi infrastructure for residential internet service. Configured network elements, performed signal strength measurements, and ensured quality of coverage across the deployment area. Technologies: Debian, Telnet, Networking.

Skills

JavaScript, TypeScript, PHP, xHTML, HTML5, CSS3, Less, BrightScript, Jira, Bugzilla, React, Redux, Angular, AngularJS:1.7, jQuery, YUI, Node.js, Express, Electron, Storybook, Socket.io, Google Maps API, REST API, WebSockets, PostMessage, Canvas, WebRTC, WebWorker, Manifest, LocalStorage, Tailwind CSS, MongoDB, MySQL, Webpack, Vite, Gulp, Grunt, Jest, Mocha, Selenide, Apache, Nginx, Varnish, TeamCity, GitHubActions, Pipelines, HTML-based, HbbTV, LG Smart Tv, ATSC 3.0, Samsung SmartTv, Roku, Freeview Play, Android, iOS, Xfinity, Fire TV, Playstation 4/5, Xbox One, Git, MS Windows, Linux, Ubuntu, VirtualBox, Networking, AI Code Assist, Telnet, Debian, CheatEngine, WireShark, RaspberryPi I/O, Arduino, VSCode, WebStorm, MSOffice