Sergei Fedorovich Building browser games and modern web apps
Welcome to my portfolio
Get to know me a little closer
I'm Sergei, a game frontend developer. I build browser games with Pixi.js, web apps and extensions with React, servers with Node.js and work with AI agents.
Game Feel
Complex game mechanics, animation and sound that run smoothly on any device.
End to End
I take work from idea to release: interface, server, CI and deployment. I ship and maintain my own products.
Team
I love sharing knowledge, doing code reviews and helping junior developers grow. I value a good sense of humor and a friendly atmosphere.
How I can help your next project
Games & Graphics
Browser games in production on Pixi.js and the WebGPU scene at the top of this site.
Interfaces
Fast interfaces with complex state, from game HUDs to editors and data-heavy apps.
Browser Platform
Chrome extensions, offline apps and heavy work moved off the main thread.
Backend
APIs, realtime connections and sync servers, mostly on Node.js.
Infrastructure & CI/CD
GitLab CI pipelines on shared templates, Docker images and deploys with rollback.
Tooling & Quality
Builds and tests that catch problems before users do.
AI
Agents wired into everyday work: MCP servers, custom skills and hooks, with reviews and tests checking every result.
Process
Tasks in Jira, technical documentation, localization and code reviews.
Experience by year
PlayMax
Game Frontend Developer
January 2025 — Current
Designed and developed high-performance browser games using PixiJS 7/8 with a modern TypeScript stack, MobX for state management, React for UI components, and GSAP for complex animations; integrated Spine animations to create smooth animations with rendering performance optimization.
Designed and implemented from scratch a full-featured audio library based on Web Audio API with audio stream management and sound acceleration without pitch effect, providing flexible sound effects control with minimal impact on game engine performance.
Participated in designing and developing server architecture using NestJS, including REST API, WebSocket connections implementation for multiplayer features, and query optimization to reduce load.
Coordinated the onboarding and professional development process for junior developers: conducted code reviews, organized technical sessions on architectural patterns and best practices, created training materials, and implemented a progressive task difficulty system for effective skill development of junior specialists.
Sportdata Limited
Game Frontend Developer
February 2024 — January 2025
Created games using PixiJS (v5, v6, v7), React Pixi, XState, and TypeScript.
Developed interactive elements and game scenes with performance and rendering optimization in mind.
Implemented complex animations and visual effects to create an engaging gaming experience.
Integrated audio systems and managed audio streams to ensure quality sound accompaniment.
Designed and implemented complex game mechanics using finite state machines and application state management.
Sportdata Limited
Frontend Developer
July 2023 — January 2024
Developed complex web applications using React, Backbone, JavaScript, and Mercurial for source code management, styled interfaces with Stylus, worked with WebSockets, developed and maintained class components, as well as processed and displayed real-time data with performance optimization and ensuring stable application operation.
telegif.com
Frontend Developer
June 2022 — July 2023
Development of complex web applications using React, Redux, TypeScript, working with tables, large amounts of data, graphics, and images, implementation of infinite scroll, optimization of user interface, writing unit tests, working with AJAX for CRUD operations and data processing, experience with version control systems Git and GitLab.
sys.by
Technical Support Engineer
November 2021 — June 2022
Writing technical specifications, provided technical assistance and resolved software-related issues for users.
Master in Economics 2017–2019
Completion of Master's degree in Economics. Gained knowledge and expertise in various economic theories, quantitative analysis, and statistical modeling.
Bachelor in Economics 2013–2017
Actively engaging in research projects and academic conferences. Received Headmaster's award.
