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Senior C++ Engineer

Job in Oxford, Oxfordshire, OX1, England, UK
Listing for: Avanti Recruitment
Full Time position
Listed on 2026-05-05
Job specializations:
  • Software Development
    C++ Developer, Software Engineer, Backend Developer, Senior Developer
Salary/Wage Range or Industry Benchmark: 90000 - 95000 GBP Yearly GBP 90000.00 95000.00 YEAR
Job Description & How to Apply Below

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

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Position Requirements
10+ Years work experience
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