Software Engineer, Web Platform

Unity; Brighton; On-site; GBP 43,000 - 64,000; Full time

Benefits offered by this job

Health insurance

Stock ownership

Retirement plan

Vacation days

Parental leave

Office snacks

Mental health support

ERGs

Training programs

Volunteer matching

Job summary

Unity is hiring a Software Engineer for the Web Platform team. You will embed Unity inside the browser, work close to the metal across C++, C# and JavaScript, and help deliver the Unity Web runtime to developers worldwide.

This role offers growth, learning from experienced teammates, and exposure to scale across platforms. The team focuses on performance, complexity, and reliability in browser-based Unity runtimes, with opportunities to contribute to next-generation Web deployments and

Qualifications

• Proficient in C++ with practical software experience.
• Experience with C# or JavaScript is a plus.
• Curiosity about browser internals and performance optimization.

Responsibilities

• Maintain and extend the Unity Web runtime and related features.
• Improve download size, load time, and startup performance of Web builds.
• Develop, profile, debug and optimize across C++, C#, and JavaScript.
• Collaborate to scope work and follow established codebase patterns.
• Investigate and fix issues raised by internal teams and external developers.

Skills

C++

C#

JavaScript

Profiling

Debugging

Communication

Low-level

Tools

WebAssembly

Emscripten

LLVM

WebGL

Job description

The opportunity

We are hiring for a 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. Browsers have advanced enormously in the last few years, browser gaming is going through a revival, and the Unity Web runtime is the technology that 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.

You will help maintain and extend the Unity Web runtime alongside engineers who have spent their careers in this space, including people who helped invent the browser technology we build on. This is not website development. We embed Unity inside the browser and work close to the metal across C++, C# and JavaScript. You will have real opportunity to grow, to learn from experienced teammates, and to see your work reach developers all over the world.

What You'll Be Doing

• Maintain and extend the Unity Web runtime, contributing features and fixes across the platform
• Help improve the download size, load time and startup performance of Web builds
• Develop, profile, debug and optimize across C++, C# and JavaScript
• Scope your work with your manager and teammates, building on established patterns in the codebase
• Investigate and fix issues raised by internal teams and by developers shipping on the Web platform
• Keep pace with the browser's constantly evolving capabilities and bring what you learn back to the team

What We're Looking For

• Hands-on development experience with C++
• Working familiarity with C# and/or JavaScript
• Curiosity about how browsers work under the hood, rather than about building websites
• Ability to profile, debug and optimize native code
• Effective written/verbal communication within a distributed, multi-functional team
• A forward thinker who perseveres on low-level problems that take time to unpick

You might also have

• Exposure to WebAssembly, Emscripten, LLVM or WebGL
• Experience with real-time 3D or game engines
• Familiarity with code size optimization or compression techniques

United Kingdom Base Salary Range:

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

• Zone A: £42,900 - £64,300 GBP gross
• Zone B: £49,000 - £73,600 GBP 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.

Finland Base Salary Range:

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

• Zone A: €51,800 - €77,600 EUR gross

Lithuania Base Salary Range:

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

• Zone A: €41,800 - €62,600 EUR gross

Benefits

• 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 design, simulate, and collaborate in 3D — closing the gap between ideas and reality. For more information, please visit www.unity.com.

Unity is a proud equal opportunity employer. We are committed to fostering an inclusive, innovative environment and celebrate our employees across age, race, color, ancestry, national origin, religion, disability, sex, gender identity or expression, sexual orientation, or any other protected status in accordance with applicable law. Our differences are strengths that enable us to support the growing and evolving needs of our customers, partners, and collaborators.

If you have a disability that means there are preparations or accommodations we can make to help ensure you have a comfortable and positive interview experience, please fill out this form to let us know.

This position requires the incumbent to have a sufficient knowledge of English to have professional verbal and written exchanges in this language since the performance of the duties related to this position requires frequent and regular communication with colleagues and partners located worldwide and whose common language is English.

This posting is intended to fill an existing vacancy, and we are committed to providing applicants with updates throughout the hiring process in accordance with applicable law.