Senior C++ Developer

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