Senior Software Engineer, Web Platform

About the role

Unity is looking for a Senior Software Engineer to join its Web Platform team. You will help evolve the Unity Web runtime that powers real‑time 3D content in browsers, enabling games to load and run instantly at massive scale.

Key responsibilities

• Own meaningful areas of the Unity Web runtime from design through release.
• Research, design and implement optimizations such as code stripping and progressive asset loading.
• Improve download size, load and startup performance for Web builds and set measurable targets.
• Solve low‑level problems across C++, C# and JavaScript, including adding multi‑threading to previously single‑threaded components.
• Partner with other Unity teams to translate platform needs into concrete work.
• Mentor teammates and raise code‑quality standards across the team.

Required profile

• 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 drive solutions independently.
• Experience profiling, debugging and optimizing across the native‑browser boundary.
• Working knowledge of C# and JavaScript.
• Effective written and verbal communication with peers, managers and cross‑functional partners.
• Proven track record of mentoring engineers and raising code‑quality standards.

Required skills

• C++
• WebAssembly
• Emscripten
• LLVM
• C#
• JavaScript
• Profiling
• Debugging
• Multi‑threading
• Build size reduction
• Compression methodologies

What we offer

• Comprehensive health, life and disability insurance
• Commute subsidy
• Employee stock ownership
• Competitive retirement/pension plans
• Generous vacation and personal days
• Support for new parents through leave and family‑care programs
• Office food snacks and mental‑health wellbeing programs
• Employee Resource Groups and global assistance programs
• Training and development opportunities
• Volunteering and donation‑matching program