Specialist C++ Engineer in London

Join to apply for the Specialist C++ Engineer role at Magnopus. Magnopus is on a mission to bridge the physical & digital divide with our groundbreaking set of client applications powered by the Connected Spaces Platform: an open‐source SDK that is paving the way for the future of the spatial internet. Through engine interop APIs, creators can build and publish spatial experiences that are as interconnected and accessible as the web pages of today. This innovative platform ensures seamless experiences across multiple technologies, allowing users to navigate through diverse digital and physical spaces without the barriers of switching identities, devices, or interfaces.

We are seeking an experienced Senior C++ Engineer to work on the core library of the Connected Spaces Platform. This role is for a systems engineer who is genuinely excited at the prospect of working across multiple domains and technologies, to deliver value to our internal teams and external clients. We are looking for an independent thinker who can help define the work that needs to be done. The successful candidate will be able to navigate a technically broad system consisting of multiple language runtimes, and will find success managing this through a focus on quality and continual improvement. You will play a key role in shaping how the platform evolves - from planning and designing solutions to guiding best practices.

We collaborate asynchronously across distributed teams and value written, transparent communication and autonomy. You will be joining a team that values clarity, trust, and momentum - where everyone understands their dependencies and takes initiative to keep things moving in the right direction. By joining Magnopus, you will not only work on enhancing the platform's capabilities, but also contribute to our vision of building an open and accessible spatial internet for all.

What will help you succeed in this role:

• High level of proficiency with modern C++ (17 or higher).
• Comprehensive knowledge of best practices, design patterns, and architectural principles essential for C++ library development.
• Proven, hands‐on experience targeting multiple operating systems such as Windows, Linux, MacOS and iOS.
• Ability to independently plan and deliver solutions, including scoping and owning features.
• Ability to understand and respond to the needs of dependent clients and teams, including adapting C++ patterns to the idiomatic best practices of other languages such as C# or JavaScript.
• A self‐critical approach to work quality and a drive to improve codebases and address technical debt.
• Practical experience integrating RESTful and/or GraphQL APIs.
• Ability to design usable and maintainable API surfaces.
• Strong communication skills that support clear and effective collaboration across technical levels.
• Experience using and maintaining build systems for cross-platform C++ projects and their dependencies.
• Familiarity with real-time networking.
• Experience using and maintaining CI and CD pipelines for complex multi-platform build scenarios.
• A focus on delivering stability through code that is inherently testable.

Even better if you also have:

• Experience with embedded scripting runtimes.
• Dependencies with web technologies (Emscripten/WASM).
• Experience with Unreal Engine and/or Unity.

£65,000 - £75,000 a year.

Application review: Our team will carefully review your application to assess alignment with the role.

Recruiter screening call (30 minutes): A general conversation to learn more about you, share insights about the company and role, and cover the basics.

Craft interview (1.5 hours): A deep dive into your skills and expertise, including a collaborative code review exercise that explores your technical capabilities, domain knowledge, and approach to working through problems as a team.

Ways of working interview (1 hour): A conversation focused on your working practices, goals, and alignment with our values.

Offer: If successful, we will extend an offer and guide you through the next steps.

About us: Magnopus is an experience-focused technology company founded by a team of Oscar‐winning artists, designers, and engineers from games, films, and other unusual places. We are passionate about creating rich experiences that unite the physical and digital worlds. Because we are building the future, we endeavour to create a diverse, creative workplace where people from many perspectives collaborate across disciplines to create amazing things together. We invest in our employees' progression with ongoing education and mentorship opportunities, and support their happiness and productivity through generous health care, time off, and other benefits.

We try to foster a safe environment where we can take risks, and learn from our failures. While we value individual talents, we favour collaboration more. We believe that the leadership of the company works for the employees, not the other way around. We feel strongly that our employees guide who we are as a company and the work we create, so we look for characteristics of curiosity, empathy, respect, honesty, and courage in every candidate.

Please be aware that, if you are selected for a position, you will be required to provide proof of your right to work in the UK in accordance with the Immigration, Asylum and Nationality Act 2006. This may involve providing original documents such as a passport or residence permit. Failure to provide the necessary documentation may affect your employment eligibility.

We may use artificial intelligence (AI) tools to support parts of the hiring process - for example, to transcribe interviews and generate summaries. These tools are not used to review applications or analyse resumes, and they do not replace human judgement. All hiring decisions are made by people. If you would like more information about how your data is processed, please contact us.