Senior Software Engineer Unity Runtime / XR Platforms (London)

Senior Software Engineer Unity Runtime / XR PlatformsSenior Software Engineer Unity Runtime / XR Platforms

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Base pay range

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Technology & Engineering Division Senior Advisor

Were hiring a Senior Software Engineer (contract) to join a team working on next-gen immersive platform experiences think runtime engine, asset pipelines, and performance tooling for large-scale 3D environments.

You'll be part of a crew who work behind the scenes: the folks who make sure real-time 3D worlds run smoothly, load correctly, and dont fall over. This is not a game dev or content creation role its core engineering.

The Offer

• Annual Salary up to 140,000 doe and location
• 6-month contract - inside IR35 - PAYE - paid on a weekly basis
• 3 Days onsite - Hybrid work model - offices based in Central London

What you'll do

• Tackle system reliability issues across a complex Unity/C#/C++ stack
• Build tools and diagnostics to improve performance and stability
• Work on the runtime engine powering multiplayer, spatial transitions, and real-time rendering
• Collaborate with global engineering teams and ship code at scale

What we're looking for

• 10+ years engineering experience system/product generalist mindset
• Deep hands-on experience with Unity (C#) in non-game contexts
• Solid C++ and Windows dev experience
• Proven work on runtime engines, performance tooling, or infrastructure for 3D apps
• Strong debugging, profiling, and CI/CD knowledge
• Bonus: Familiar with VR/AR platforms, build systems (Buck, Bazel), and large-scale codebases

Were keeping it lean if you know your way around real-time 3D platforms and have shipped complex systems at scale, I want to hear from you.

Apply Now with your CV for more information. Som | som@principlehr.com

Seniority level

• Seniority levelMid-Senior level

Employment type

• Employment typeContract

Job function

• Job functionInformation Technology, Product Management, and Consulting
• IndustriesTechnology, Information and Media, Software Development, and Information Services

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