Senior Software Engineer

Unity Technologies SF; Bellevue (WA); On-site; USD 115,000 - 220,000; Full time

Benefits offered by this job

Health insurance

Commuter subsidy

Employee stock ownership

Pension plans

Vacation and personal days

Parent leave support

Office snacks

Mental Health programs

ERGs

Training & development

Volunteering & donation matching

Job summary

Unity Technologies SF is seeking a Senior Software Engineer to join a team delivering platform support for TV and mobile form factors. You will help build fast, portable, cross‑platform code in a large production codebase and contribute to performance on WebGPU/WebAssembly.

Collaborate with global R&D teams to optimize the editor workflows, profile CPU/GPU/memory, and implement scalable features in a multi‑threaded environment.

Qualifications

• Strong C++ in a large production codebase, with focus on performance, memory, and threading.
• Meaningful WebAssembly experience; Emscripten in the browser; Wasm in server-side or edge runtimes counts.
• Solid understanding of cross-language calls and memory marshalling.
• Proficiency with profiling tools across CPU, GPU, I/O, and memory; measure before optimizing.

Responsibilities

• Design and develop features and workflows in the Unity Editor for platform configurations.
• Profile and optimize WebGPU/WebAssembly performance; tackle load times and memory management.
• Investigate and resolve bug reports to maintain a stable platform.
• Automated testing and code reviews to foster innovation and technical excellence.

Skills

C++

WebAssembly

Emscripten

Rust Wasm

JavaScript/Node

C#

Profiling tools

Multithreaded design

Cross-platform

Tools

WebGPU

Vulkan

HTML5/WebGL

Emscripten toolchain

Job description

We are looking for a Senior Software Engineer to join a new team delivering Unity platform support for a key platform partner bringing games to TV and mobile form factors. To reach every screen, we will be leveraging both streaming from Linux in the cloud and Web browser builds to be instantly loadable.The team's goals include delivering stable platform support, realizing developer workflows for Unity users to unlock the unique features of this platform, and leading optimization initiatives to enable Unity to be efficient on the widest possible array of target devices.You have probably worked on performance-critical, cross-platform applications in the past and you know the importance of writing fast, portable and scalable code. You may also be familiar with real-time, browser-based application development using technologies such as HTML5, WebGL/WebGPU, WebAssembly/Emscripten; and/or Linux application technologies such as SDL, Wayland, Linux desktop.

What you'll be doing

• Working as part of an agile team, to design and develop features and workflows in the Unity Editor to support these specific platform configurations.
• In collaboration with Unity R&D teams around the world, profile and optimize WebGPU/WebAssembly performance - tackling load times, memory management, and the unique constraints of a browser-hosted Unity runtime.
• Ensure a stable platform by investigating and resolving bug reports
• Strengthen quality and delivery through automated testing and thoughtful code reviews - while fostering a culture of innovation, teamwork, and technical excellence.

What we're looking for

• Strong C++ in a large production codebase. Modern C++, in performance-critical systems where memory, threading, and cache behavior are things you reason about deliberately.
• Meaningful WebAssembly experience. Emscripten in the browser is the most direct path, but we're open: Rust compiled to Wasm counts, and so does Wasm outside the browser - server-side compute, Node, edge runtimes, or work on the runtimes and toolchain themselves. If you've wrestled with binary size, startup time, linear memory, or the host interop boundary, that's what we're after.
• Solid understanding of how applications span languages and runtimes. How synchronous and asynchronous calls cross the boundary, and how memory is owned and marshalled between them.
• Proficiency with profiling tools across CPU, GPU, I/O, and memory - and the habit of measuring before optimizing.
• Experience designing and implementing scalable features in a large multithreaded codebase.
• Working proficiency in C#. Unity's Editor and much of its tooling is C#, and you'll write it. Deep prior C# isn't required if your systems fundamentals are strong.

You might also have (optional)

• Familiarity with real time 3D rendering techniques and graphics APIs including WebGPU and/or Vulkan
• A methodical approach to researching and developing innovative optimization solutions
• A passion for the future of computer games or real-time 3D experiences in a variety of settings
• Familiarity with how to best use AI in the software development process.

Base Salary Range

We determine the base salary range for this role based on your primary work location:

• Zone A: $115,400 - $173,000 USD gross
• Zone B: $130,400 - $195,600 USD gross
• Zone C: $146,500 - $219,700 USD 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.

Benefits

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.

• 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
• Mental Health and Wellbeing programs and support
• Employee Resource Groups
• Global Employee Assistance Program
• Training and development programs
• Volunteering and donation matching program

Life at Unity

Unity [NYSE: U] is the world's leading game engine, powering play for more than 3 billion consumers each month. The top mobile games in the world, the most played PC indie titles, the most innovative console games, and virtually all of the top XR and Web Games are developed, deployed, and grown in Unity. Unity also enables teams across industries like automotive, manufacturing, and healthcare to des