Senior C++ Software Engineer

Senior C++ Software Engineer

A fantastic opportunity for a Senior C++ Software Engineer to join a successful technology company developing complex, high-performance software products. Working within an established research and development team, you will take ownership of new ideas from initial prototypes through to production, using modern C++ to build fast, scalable and robust systems.

Location: Cambridge, hybrid working with a minimum of 2 days per week in the office

Salary: £70,000 - £80,000 per annum + excellent benefits

Requirements for Senior C++ Software Engineer:

• Strong commercial experience developing production-quality software using modern C++, ideally C++17/20 or beyond
• A strong understanding of modern C++ techniques, including RAII, templates, the STL, smart pointers and concurrency
• Experience profiling and optimising native applications, including multithreading, CPU performance and memory efficiency
• Good knowledge of Linux/Unix environments and systems-level development
• Familiarity with C++ development tools such as CMake, GCC/Clang and GDB/LLDB
• Familiarity with Docker and containerisation
• Excellent analytical and complex problem-solving skills, with the ability to reason about system behaviour
• Ability to work autonomously within complex codebases and make well-reasoned design and implementation decisions
• Strong communication skills and the ability to collaborate effectively with colleagues across different disciplines
• Knowledge of, or an interest in, low-level systems and software security
• Experience with cloud computing, Python or Rust would be beneficial but is not essential

Responsibilities for Senior C++ Software Engineer:

• Prototype and develop new software capabilities using modern C++
• Design and implement efficient, memory-safe code for high-performance, low-latency systems
• Contribute to the development and optimisation of large-scale native applications
• Profile applications and improve performance, concurrency, memory usage and scalability
• Take ownership of technical decisions, balancing new ideas with practical delivery requirements
• Work closely with engineers and colleagues across design, project coordination and technical strategy
• Maintain high standards of code quality, system design and maintainability
• Build deeper expertise in systems programming, performance optimisation or security-focused development

What the role offers:

• Ownership of technically challenging projects, taking ideas from early prototypes through to production
• The opportunity to deepen your modern C++ expertise while building high-performance, low-latency systems
• A collaborative R&D environment with opportunities to specialise in systems programming, performance optimisation or software security

We’re committed to creating an inclusive and accessible recruitment process. If you require reasonable adjustments for your application or during the review process, please highlight this by separately emailing

Keywords: Senior C++ Software Engineer / Senior Software Engineer / C++ Developer / Senior C++ Developer / Systems Software Engineer / Systems Programmer / Native Software Engineer / R&D Software Engineer / Software Developer / Platform Software Engineer / Linux Software Engineer / Software Development Engineer / C++ / C++17 / C++20 / STL / CMake / GCC / Clang / GDB / LLDB / Linux / Unix / Docker / Python / Rust / Cloud Computing / Multithreading / Concurrency / Computer Science / Software Engineering / Mathematics / Physics / Engineering

We are an equal opportunity employer and value diversity at RedTech. We do not discriminate on the basis of race, religion, colour, national origin, gender, sexual orientation, age, marital status, veteran status, or disability status.