Job Description:

Senior C++ Developer – Oxford (Hybrid, 3 days onsite)
£75k to £95k

Avanti Recruitment is partnering with an innovative deep-tech software company developing high-performance software used by millions of devices worldwide.

This is an opportunity to join a small team of exceptional engineers working on the company's core C++ platform. The work is technically demanding, with a strong emphasis on performance, correctness and elegant software design rather than rapid feature delivery.

The Role

You'll be working on the core software platform, solving complex engineering problems involving:

• Modern C++ development
• High-performance algorithms and data structures
• Concurrent and multithreaded programming
• Memory management and performance optimisation
• Cross-platform software development across Linux, Windows and macOS
• Designing and maintaining robust, scalable software at the heart of a globally deployed product

This is a hands-on engineering role where you'll spend your time solving difficult technical problems, improving performance and writing clean, maintainable code. You'll be joining a team of experienced software engineers, computer scientists and PhDs who are passionate about solving complex engineering problems.

We're Looking For

You'll ideally have experience with:

• Modern C++ (C++17 or later)
• Performance-critical or systems-level software
• Multithreaded and concurrent programming
• Strong computer science fundamentals, including algorithms and data structures
• Linux development
• Debugging and optimising complex software

Experience in any of the following would be advantageous:

• Database engines
• Compilers
• Distributed systems
• High-performance backend platforms
• Scientific or numerical computing
• Graphics, simulation or game engines
• Low-latency or real-time systems

Why Join?

• Work on a sophisticated C++ codebase deployed at global scale
• Join a highly experienced engineering team where technical excellence is valued
• Tackle genuinely challenging problems in performance, concurrency and software architecture
• Influence the evolution of a core product rather than building peripheral features
• Hybrid working with an Oxford-based team

This role is ideal for engineers who enjoy understanding how software works beneath the surface, care about writing high-quality code, and want to work on technically challenging C++ systems.