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Szymon Kościelniak - Senior Unity Developer in Warsaw, Poland

Szymon Kościelniak

Senior Unity Developer specializing in mobile and VR/PC games

Reality GamesWest Pomeranian University of TechnologyWarsaw, Poland7 Years ExperienceSenior Level

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About

Unity gameplay engineer from Moonactive who rewrote the gameplay engine for ZenMatch, maintaining two engines in parallel via a separation layer to improve robustness/scalability and make new content easier to ship. Also implemented multiplayer for a client prototype using the Onion networking framework and is familiar with Photon Fusion concepts.

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Key Strengths

  • Rewrote a full gameplay engine in Unity for a live game (ZenMatch at Moonactive)
  • Managed a complex transition by running and maintaining two engines in parallel with a separation layer
  • Improved robustness and scalability; enabled faster addition of new gameplay content
  • Implemented multiplayer networking for a client prototype (driver + instructor instances)

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Experience

Senior Unity DeveloperREALITY GAMES · Jun 2025 – Present
Senior Unity DeveloperPLAYTIKA · May 2025 – Jul 2025
Senior Unity DeveloperMOON ACTIVE · Mar 2022 – Feb 2025
Unity DeveloperSIMMERSIV · Oct 2020 – Apr 2022
Unity 3D DeveloperBYSS MOBILE · Nov 2018 – Oct 2020

Education

West Pomeranian University of Technologybachelor, Digital Engineering (2018)

Languages

PolishEnglishItalian

Certifications

MTA - Software Development Fundamentals (Microsoft Certified)CILS B1 - Certificazione dell’italiano come lingua straniera

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Szymon KościelniakSenior Unity Developer specializing in mobile and VR/PC games