Senior C++ Software Engineer

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.

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

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

You'll ideally have experience with:

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• Modern C++ (C++17 or later)
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• Performance-critical or systems-level software
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• Multithreaded and concurrent programming
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• Strong computer science fundamentals, including algorithms and data structures
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• Linux development
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• Debugging and optimising complex software
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Experience in any of the following would be advantageous:

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• Database engines
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• Compilers
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• Distributed systems
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• High-performance backend platforms
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• Scientific or numerical computing
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• Graphics, simulation or game engines
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• Low-latency or real-time systems
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• Work on a sophisticated C++ codebase deployed at global scale
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• Join a highly experienced engineering team where technical excellence is valued
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• Tackle genuinely challenging problems in performance, concurrency and software architecture
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• Influence the evolution of a core product rather than building peripheral features
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• Hybrid working with an Oxford-based team
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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.