Senior C++ Engineer – High Performance Systems
Oxford (Hybrid), £90k to £95k
Avanti Recruitment is working with a deep-tech company behind a high-performance reasoning engine deployed on over 60 million devices worldwide.
This is core engine development for an elite engineering team working on core C++ systems, where performance, correctness, and engineering quality are absolutely critical.
The Role
You’ll be working on a performance-critical C++ system, tackling problems around:
*Complex data processing and reasoning
*Concurrency and multithreaded systems
*Memory efficiency and low-level optimisation
*Cross-platform behaviour (Linux, Windows, macOS)
*System-level interactions where required
This is hands-on, systems-level engineering.
Skills required
*10-15 years of software development experience
*Strong commercial experience with modern C++ (C++17 or later)
*Background in systems-level or performance-critical development
*Solid understanding of multithreading / concurrency
*Comfortable working close to the system (memory, OS behaviour, performance)
*Passion for writing high-quality, maintainable code
Bonus points
*Experience with low-level optimisation
*High-performance backend systems
*Quant / trading systems
*Database or engine development
*Gaming / real-time systems
*Familiarity with cross-platform development
What Makes This Role Different
*Work on a core product used at global scale
*Strong focus on engineering quality over shortcuts
*Backed by a major global technology organisation, offering stability and long-term growth
If you’re a C++ engineer who enjoys working on complex, high-performance systems and wants to be part of something genuinely impactful, we’d love to hear from you.