Web Game Developer

*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. Requirements 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. Benefits - Competitive Salary. - Dynamic, multicultural and fun environment. - You will be working for the world's leading provider of game services. - We empower our people and offer regular progression opportunities to ensure our employees flourish. About Side Side (formerly PTW) is a global video game development and services provider, offering technical and creative solutions to many of the largest developers and studios around the world. Founded in 2009 and drawing on 30+ years' experience from our parent company in Japan, Side has since grown to become a global force with 20 studios in 14 countries across North America, Europe, South America, and Asia. Our industry-leading services include game development, art production, audio production, quality assurance, localization, localization QA, player support, community management, and datasets. Experience our side of life. For more information, visit www.side.inc *Applications and CVs/resumes MUST be submitted in English to be considered*