Senior Software Engineer Unity Runtime / XR Platforms (London)

This range is provided by Principle. Your actual pay will be based on your skills and experience talk with your recruiter to learn more.

Direct message the job poster from Principle

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
  Mid-Senior level

• Employment type
  Contract

• Job function
  Information Technology, Product Management, and Consulting
• Industries
  Technology, Information and Media, Software Development, and Information Services

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