Senior Software Engineer, Web Platform

We are hiring for a Senior Software Engineer to join our Web Platform team here at Unity. Unity's Web platform lets games and real-time 3D content run in a browser, on any internet connected device. Browser capability has moved fast, browser gaming is going through a revival, and the Unity Web runtime is what makes it possible. Our work also supports an exciting new partnership with a major platform, which puts what this team builds in front of audiences at a scale few browser platforms reach. In this role, you will own meaningful areas of the runtime outright. This is not website development. We embed Unity inside the browser, and the problems are the deep ones: making a single-threaded platform multi-threaded, cutting megabytes out of a build, getting a game playable in seconds rather than minutes. You will work alongside engineers who helped invent the browser technology we build on, and you will help the people around you grow.

Own meaningful areas of the Unity Web runtime, from design through to release Research, design and implement optimizations to the Web build target, such as stripping unused code from builds and progressively loading assets as a game needs them Improve download size, load and startup performance for Web builds, and set measurable targets for it Solve uncommon, low-level problems across C++, C# and JavaScript, for example bringing multi-threading to parts of the runtime that are single-threaded today Partner with teams across Unity who build on the Web platform, translating what they need into platform work Mentor teammates and help set the bar for code quality across the team Keep Unity at the frontier of the Web's constantly evolving capabilities What we're looking for Deep, hands-on proficiency with C++ in performance sensitive code Development experience with WebAssembly, using Emscripten and/or LLVM Ability to decompose complex technical problems and complete them on your own technical judgment Experience profiling, debugging and optimizing across the native and browser boundary Working knowledge of C# and JavaScript Effective written/verbal communication with peers, managers and key decision makers in other teams A proven track record of mentoring engineers and raising code quality standards You might also have Experience contributing to a browser engine or browser runtime Deeper domain knowledge of rendering, physics or audio in a real-time 3D engine Familiarity with compression methodologies and build size reduction United Kingdom Base Salary Range: We determine the base salary range for this role based on your primary work location: Zone A: £55,700 - £83,500 GBP gross Zone B: £63,700 - £95,500 GBP gross Finland Base Salary Range: We determine the base salary range for this role based on your primary work location: Zone A: €62,700 - €94,100 EUR gross Lithuania Base Salary Range: We determine the base salary range for this role based on your primary work location: Zone A: €54,200 - €81,400 EUR gross This range reflects the anticipated base salary for this position. Beyond base salary, this role may be eligible for equity awards and participation in our company incentive plans (such as annual discretionary bonuses or sales commissions). The final offer amount will depend on several factors, including geographic location and the candidate’s relevant experience, professional background, and skill set.

At Unity, we want our team members to thrive. We offer a wide range of benefits designed to support well-being and work-life balance. Please note: Benefits eligibility, specific offerings, and coverage vary based on the country and employment status. While specific benefits vary, here are some of the ways we strive to take care of our eligible team members globally: Comprehensive health, life, and disability insurance | Commute subsidy | Employee stock ownership | Competitive retirement/pension plans | Generous vacation and