Senior Web Platform Architect (C++/Wasm)

Unity; Greater London; On-site; GBP 62,000 - 93,000; Full time

Benefits offered by this job

Health insurance

Commuter subsidy

Employee stock ownership

Retirement plans

Generous vacation

Parental leave support

Office snacks

Mental health programs

ERGs

Training and development

Volunteering program

Job summary

Unity's Web Platform team is hiring a Senior Software Engineer to shape the architecture of the Web runtime embedded in browsers. This role focuses on deep, native work rather than general website development, helping decide where the platform goes next.

You will own technical direction, tackle complex root-cause analysis, and drive performance optimizations like code stripping, progressive asset loading, and multi-threading. Mentoring across the team and clear guidance to leaders are expected.

Qualifications

• Expert level C++ in low-level, performance sensitive code.
• Substantial development experience with WebAssembly, using Emscripten and/or LLVM.
• A proven track record of owning architecture for a platform or runtime and validating it against real customer needs.
• Ability to run deep root cause analysis on complex, multidimensional problems.
• Ability to work independently, prioritizing against long-term platform goals.
• Effective written/verbal communication that boils deep technical detail down for teams outside your own.
• A proven track record of mentoring engineers and raising the technical bar across a team.

Responsibilities

• Help own the technical direction and architecture of the Unity Web platform.
• Resolve complex, multidimensional problems in the runtime with deep root cause analysis.
• Research, design and implement optimizations like code stripping, progressive asset loading and multi-threading.
• Prioritize and complete your own portfolio of platform work with your manager.
• Act as first line of support for teams across Unity and partners needing core Web platform work.
• Mentor engineers across the team and set the bar for code quality.
• Translate technical trade-offs into clear recommendations for Unity leadership.

Skills

C++ expert

WebAssembly

Architecture ownership

Root cause analysis

Independent work

Communication

Mentoring engineers

Job description

Unity's Web Platform team is hiring a Senior Software Engineer to shape the architecture of the Web runtime embedded in browsers. This role focuses on deep, native work rather than general website development, helping decide where the platform goes next.

You will own technical direction, tackle complex root-cause analysis, and drive performance optimizations like code stripping, progressive asset loading, and multi-threading. Mentoring across the team and clear guidance to leaders are expected.