--- title: "Meet Our React, React Native & AI Experts | Callstack" description: "Meet Callstack's engineers, AI specialists, open source maintainers, and leadership team building React and React Native products." url: https://www.callstack.com/team updated: 2026-10-26T09:17:48.204Z --- # Meet Our React, React Native & AI Experts | Callstack Meet Callstack's engineers, AI specialists, open source maintainers, and leadership team building React and React Native products. Meet the team ## Meet the Callstack experts Core contributors, open-source maintainers, and product engineers building the tools and apps teams rely on. [Join us](https://www.callstack.com/careers) ## Executive Team Meet the leaders guiding Callstack’s engineering, delivery, growth, finance, and people teams. ### [Mike Grabowski](https://www.callstack.com/team/mike-grabowski) CEO & Founder [LinkedIn](https://www.linkedin.com/in/grabbou/) · [X/Twitter](https://twitter.com/grabbou) · [GitHub](https://github.com/grabbou) ### [Alex Rak](https://www.callstack.com/team/alex-rak) CFO [LinkedIn](https://www.linkedin.com/in/aleksander-rak/) ### [Grzegorz Wołodko](https://www.callstack.com/team/grzegorz-wolodko) CDO [LinkedIn](https://www.linkedin.com/in/grzegorz-wolodko-capgemini/) ### [Radek Chrzempka](https://www.callstack.com/team/radek-chrzempka) Head of People & Culture [LinkedIn](https://www.linkedin.com/in/radoslaw-chrzempka-3b27a453/) ### [Michał Chudziak](https://www.callstack.com/team/mike-chudziak) Head of Engineering [LinkedIn](https://www.linkedin.com/in/michalchudziak/) · [X/Twitter](https://twitter.com/michalchudziak) · [GitHub](https://github.com/michalchudziak) ### [Ada Gawrysiak](https://www.callstack.com/team/ada-gawrysiak) Head of Growth [LinkedIn](https://www.linkedin.com/in/ada-gawrysiak/) · [X/Twitter](https://x.com/GawrysiakAda) ## Engineering team Engineers and open source contributors building React and React Native products, developer tools, and agentic workflows. ### [Luke Farrell](https://www.callstack.com/team/luke-farrell) Senior Software Engineer [LinkedIn](https://www.linkedin.com/in/lukebrandonfarrell/) · [X/Twitter](https://x.com/lukebfarrell) · [GitHub](https://github.com/lukebrandonfarrell) ### [Lech Kalinowski](https://www.callstack.com/team/lech-kalinowski) Senior AI System Engineer [LinkedIn](https://www.linkedin.com/in/lech-kalinowski/) · [X/Twitter](https://x.com/LeSiOO) · [GitHub](https://github.com/lech-kalinowski) ### [Piotr Miłkowski](https://www.callstack.com/team/piotr-milkowski) Senior AI System Engineer [LinkedIn](https://www.linkedin.com/in/xeonbloomfield/) · [X/Twitter](https://x.com/xeonbloomfield) · [GitHub](https://github.com/XeonBloomfield) ### [Artur Morys-Magiera](https://www.callstack.com/team/artur-morys-magiera) Software Engineer [X/Twitter](https://x.com/artus9033) · [GitHub](https://github.com/artus9033) ### [Tomasz Misiukiewicz](https://www.callstack.com/team/tomasz-misiukiewicz) Software Engineer [LinkedIn](https://www.linkedin.com/in/tomasz-misiukiewicz/) · [X/Twitter](https://twitter.com/TMisiukiewicz) · [GitHub](https://github.com/TMisiukiewicz) ### [Łukasz Chludziński](https://www.callstack.com/team/lukasz-chludzinski) Engineering Manager [LinkedIn](https://www.linkedin.com/in/lukasz-app/) · [X/Twitter](https://x.com/lukasz_app) · [GitHub](https://github.com/lukasz-app) ### [Łukasz Walczak](https://www.callstack.com/team/lukasz-walczak) Software Engineer [LinkedIn](https://www.linkedin.com/in/%C5%82ukasz-walczak-b03419122/) · [X/Twitter](https://twitter.com/_happiryu) · [GitHub](https://github.com/lukewalczak) ### [Thiago Brezinski](https://www.callstack.com/team/thiago-brezinski) Software Developer [LinkedIn](https://www.linkedin.com/in/thiagobrez/) · [X/Twitter](https://x.com/thiagobrez) · [GitHub](https://github.com/thiagobrez) ### [Satyajit Sahoo](https://www.callstack.com/team/satyajit-sahoo) Software Engineer [LinkedIn](https://www.linkedin.com/in/satya164/) · [X/Twitter](https://twitter.com/satya164) · [GitHub](https://github.com/satya164) ### [Szymon Chmal](https://www.callstack.com/team/szymon-chmal) Software Developer [LinkedIn](https://www.linkedin.com/in/szymon-chmal/) · [X/Twitter](https://x.com/ChmalSzymon) · [GitHub](https://github.com/V3RON) ### [Robert Pasiński](https://www.callstack.com/team/robert-pasinski) React Native Developer [LinkedIn](https://www.linkedin.com/in/robert-pasinski/) · [X/Twitter](https://x.com/rob_pasinski) · [GitHub](http://github.co/robik) ### [Piotr Trocki](https://www.callstack.com/team/piotr-trocki) Software Engineer [LinkedIn](https://www.linkedin.com/in/piotr-t-14913ab8/) · [X/Twitter](https://x.com/trozee_dev) · [GitHub](https://github.com/troZee) ### [Piotr Tomczewski](https://www.callstack.com/team/piotr-tomczewski) Software Developer [LinkedIn](https://www.linkedin.com/in/tomczewski/) · [X/Twitter](https://x.com/Piotrski) · [GitHub](https://github.com/piotrski) ### [Michał Pierzchała](https://www.callstack.com/team/michal-pierzchala) Principal Engineer [LinkedIn](https://www.linkedin.com/in/thymikee/) · [X/Twitter](https://twitter.com/thymikee) · [GitHub](https://github.com/thymikee) ### [Mariusz Pasiński](https://www.callstack.com/team/mariusz-pasinski) Software Engineer [LinkedIn](https://www.linkedin.com/in/mariusz-pasinski/) · [X/Twitter](https://x.com/mani3xis) · [GitHub](https://github.com/mani3xis) ### [Maciej Jastrzębski](https://www.callstack.com/team/maciej-jastrzebski) Software Engineer [LinkedIn](https://www.linkedin.com/in/mdjastrzebski/) · [X/Twitter](https://twitter.com/mdj_dev) · [GitHub](https://github.com/mdjastrzebski) ### [Kacper Rożniata](https://www.callstack.com/team/kacper-rozniata) Software Engineer [LinkedIn](https://www.linkedin.com/in/kacper-ro%C5%BCniata-62837a13a/) · [X/Twitter](https://x.com/k_rozniata) · [GitHub](https://github.com/krozniata) ### [Kewin Wereszczyński](https://www.callstack.com/team/kewin-wereszczynski) Software Engineer [LinkedIn](https://www.linkedin.com/in/kwereszczynski/) · [X/Twitter](https://x.com/Q1w1N) · [GitHub](https://github.com/Q1w1N) ### [Hur Ali](https://www.callstack.com/team/hur-ali) Software Engineer [LinkedIn](https://www.linkedin.com/in/muhammad-hur-ali-3b0821151/) · [X/Twitter](https://twitter.com/hurali97) · [GitHub](https://github.com/hurali97) ### [Dimitar Nestorov](https://www.callstack.com/team/dimitar-nestorov) Software Engineer [GitHub](https://github.com/DimitarNestorov) ### [Bartosz Klonowski](https://www.callstack.com/team/bartosz-klonowski) Software Engineer [GitHub](https://github.com/BartoszKlonowski) ### [Eduardo Graciano](https://www.callstack.com/team/eduardo-graciano) Software Engineer [X/Twitter](https://twitter.com/teddydroid07) · [GitHub](https://github.com/gedu) ### [Burak Güner](https://www.callstack.com/team/burak-guner) Software Developer [LinkedIn](https://www.linkedin.com/in/burak-guner-atlj/) · [X/Twitter](https://twitter.com/_atlj) · [GitHub](https://github.com/atlj) ### [Adam Horodyski](https://www.callstack.com/team/adam-horodyski) Software Engineer [X/Twitter](https://twitter.com/adhorodyski) · [GitHub](https://github.com/adhorodyski) JOIN US ## Build products and tools with us You'll work on the tools, infrastructure, and products defining AI-native engineering, alongside core contributors and open-source maintainers. [Join Us](https://www.callstack.com/careers) [About us](https://www.callstack.com/about-us)