Sławomir Mazgaj
Senior Software Developer
15+ years crafting interactive experiences — from Flash games engines to enterprise SaaS, adaptive learning platforms and VR
About.
I'm a Senior Software Developer with over 15 years of professional experience building interactive, high-performance web applications. My career spans from game development at Gamesys to enterprise SaaS platforms and adaptive learning technology.
I specialize in React, Next.js, and TypeScript, with deep expertise in PixiJS, Three.js and real-time graphics. I'm passionate about creating smooth, accessible user experiences that combine technical precision with thoughtful design.
Master of Science in Engineering
West Pomeranian University of Technology, Szczecin, Poland
Computer Science & Information Technology, Multimedia Methods
Thesis: “HDR tone mapping which incorporates observer's point of gaze”
Experience.
15+ years of building interactive experiences across gaming, enterprise, and education.
Senior Front End Developer
OBRIZUM
Developing an adaptive learning platform that empowers mission-critical learning with measurable impact.
- Working on big rewrite of user-facing portal and CMS from ClojureScript to Next.js
- Adding 360 video player for Web and VR
Senior Software Engineer
Simpplr · Employee Listening
Delivering real-time employee sentiment analysis and actionable insights to improve the employee experience.
- Creating brand-new survey product (creation, participation, reporting)
- Maintaining existing sentiment check product
- Added more endpoints and deployed serverless applications using AWS Lambda
- Added Mixpanel integration
Front End Developer
Yoti · Yoti Sign
Worked on a document signing platform.
- Added multiple core features: Wet signature, Pre-filled text fields, Twilio integration
- Contributed to cross-team shared React component library
- Replaced all Enzyme tests with React Testing Library
Senior Developer
Gamesys · Core Tech
Worked on various web development projects.
- Built a tournament prototype with Heroic Labs / Nakama server integration
- Maintained Game UI used across all internal Game Studios
- Created page for displaying analytics data pulled from Splunk
Senior Developer
Gamesys · Social Gaming
Helped with big mobile game lobby rewrite (for JPJ Slots).
Senior Developer
Gamesys · Game Studio
Worked on internal libraries so other devs could build games on top of them.
Senior Game Developer
Gamesys · Social Gaming
Worked on refactoring existing game lobby (JPJ Slots) on web.
- Internal "Abstraction View" framework was created to provide single codebase for web and mobile
- Lobby was white-labeled so it could be provided for different vendors
Lead Developer
Gamesys · Social Gaming
Lead development of Android version of Bingo Lane.
Game Developer
Gamesys · Social Gaming
Worked on soft-core MMORPG game (Here Be Monsters) on Facebook platform.
Junior Game Developer
Game Factory
- Worked on 17 game projects (in more than half as the only developer)
- Moved to Social Team where they worked on big Facebook games (for Wooga) such as Brain Buddies, Monster World, and Diamond Dash
Skills.
Technologies and tools I work with regularly.
Frontend
Languages
Styling
State & Data
3D & Graphics
Backend & Cloud
Tools & Workflow
Projects.
Personal and side projects showcasing different technologies.
Projects coming soon
I'm currently curating my best work to showcase here. Check back soon!
Get in touch.
Interested in working together? Let's connect.