Senior C++ Developer

Avanti Recruitment; Oxford; Hybrid; GBP 75,000 - 95,000; Full time

Benefits offered by this job

Hybrid work

Oxford team

Job summary

Avanti Recruitment is helping an innovative deep-tech software company in Oxford recruit a Senior C++ Developer. Hybrid role with 3 days onsite. The team builds a high‑performance C++ core used across Linux, Windows and macOS, emphasizing correctness and elegant design over rapid features.

You’ll solve challenging technical problems, optimize performance and contribute to a globally deployed product with an experienced team of engineers and PhDs.

Qualifications

• Proficient in modern C++ (C++17 or later) with emphasis on performance.
• Strong understanding of multithreading, concurrency and data structures.
• Experience in memory management and performance optimisation.
• Cross-platform development on Linux, Windows and macOS.

Responsibilities

• Engage in modern C++ development for a high-performance platform.
• Work on algorithms and data structures to optimise speed and scale.
• Implement concurrent, multithreaded routines with robust error handling.
• Maintain a robust, scalable core software foundation for global deployment.
• Collaborate with engineers to deliver clean, efficient, maintainable code.

Skills

Modern C++

Multithreading

Performance

Cross-platform

Memory management

Algorithms & DS

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

• 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

• 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