Web Game Developer

Side, São Paulo, Brazil, Freelance

What our tracking knows about this posting

Published on 28 September 2026 · first appeared in our records on 29 September 2026.

Stable posting: first seen on 29 September 2026, with no abnormal reposting.

This posting shows no salary, while 1% of open postings in the same sector in this country (Brazil) do.

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*Applications and CVs/resumes MUST be submitted in English to be considered* At Side, we partner with some of the world's leading developers and publishers to solve complex production challenges and help bring exceptional games to life. From concept through live operations, our co-development teams work as trusted extensions of our clients' studios, contributing expertise across design, engineering, art, audio, QA, and production. We're looking for a Web Game Developer with strong experience building browser-based games to help develop engaging, performant 2D experiences for desktop and mobile browsers. You'll work hands-on across rendering, animation, audio, responsive layouts, and performance optimization using a modern web technology stack. This is a 3-month freelance engagement , working 40 hours per week , and is fully remote within Brazil . What you will be doing: Browser Game Development • Build and maintain 2D browser-based games using TypeScript/JavaScript, PixiJS, SolidJS, Vite, HTML5, and CSS. • Implement game animations, transitions, and interactive experiences using tools such as GSAP. • Integrate web audio using Howler.js and manage game assets, sprites, textures, and atlases. Performance & Responsive Experiences • Optimize games for performance across desktop and mobile browsers, including memory, rendering, loading, and runtime performance. • Build responsive experiences that work across different screen sizes, resolutions, and aspect ratios. • Use browser debugging and profiling tools to identify and resolve performance and technical issues. Development Workflow • Collaborate with the team using Git and established development workflows. • Build reliable, maintainable systems that support efficient iteration and content development. • Troubleshoot technical issues across the game, browser, and web technology stack. What we are looking for: • Strong professional experience developing 2D browser-based games. • Proficiency with TypeScript/JavaScript and hands-on experience with PixiJS or a comparable 2D web rendering framework. • Experience with HTML5/CSS, SolidJS, Vite, and Git. • Strong understanding of browser-based animation and transitions, particularly GSAP. • Experience implementing web audio, ideally with Howler.js. • Proven experience optimizing web games for desktop and mobile browsers. • Strong understanding of responsive design, including different resolutions and aspect ratios. • Experience managing sprites, textures, atlases, and other game assets. • Comfortable using browser debugging and profiling tools to diagnose technical and performance issues. Nice to Haves: • Experience with Tailwind CSS. • Testing experience with Vitest and/or Playwright. • Familiarity with analytics and telemetry tools such as PostHog or Sentry. • Experience with asset delivery or CDN pipelines. • Previous experience developing casual, puzzle, or other HTML5 games.

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