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+ 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.
”, “datePosted”: “2026-05-21”, “hiringOrganization”: { “@type”: “Organization”, “name”: “Avanti”, “sameAs”: “https://uk.whatjobs.com/pub_api__cpl__438255941__4861?utm_campaign=publisher&utm_medium=api&utm_source=4861&geoID=559” }, “jobLocation”: { “@type”: “Place”, “address”: { “@type”: “PostalAddress”, “addressLocality”: “Oxford” } } }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+ 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.
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