Senior Developer (Fully Remote)

Senior C++ Developer<br />Permanent | Fully Remote | Negotiable Salary + Significant Equity<br />From Oxford research to securing the connected world<br />Nine years ago, a small UK technology team working alongside researchers at the University of Oxford set out to solve a problem most of the world didn’t yet realise it had.<br />Billions of machines were beginning to talk to each other — across factories, power grids, transport systems, defence networks and smart cities.

But much of that communication depended on architectures built for a different era: centralised, vulnerable and increasingly exposed.<br />So they built something different.<br />Today, the company holds patented cryptographic technology that enables fully decentralised, post-quantum secure interoperability between devices — operating at the edge without relying on always-on central connectivity.<br />It can operate across untrusted environments, enable real-time communication and support narrow AI across full-scale industrial systems.<br />What started with academic research has evolved into commercially relevant security technology with the potential for global application.<br />Now the team is growing again, and we are looking for two exceptional Senior C++ Developers who can operate where this technology really lives — deep in the network stack.<br />The Role:

Where Packets Become Trust<br />This isn't application-layer C++.<br />It isn't framework-driven development.<br />This is low-level, network-centric C and C++ engineering, working primarily around OSI Layers 2 and 3, where packet behaviour, routing decisions and tunnelling strategies determine whether distributed systems can communicate securely at scale.<br />You'll design and build technology intended ultimately to operate across millions of industrial edge devices, enabling secure cloud-to-edge communication, device-to-device authentication, decentralised routing and interoperability, secure communication across potentially untrusted networks, and robust deployment and configuration for edge environments.<br />You'll be close enough to the technology to influence how it develops — shaping architecture, solving complex networking problems and contributing to security infrastructure that could eventually underpin critical systems around the world.<br />And because this remains a relatively small, specialist engineering team, your contribution won't disappear into a huge development organisation.<br />You'll see the impact of what you build.<br />What the Director of Engineering Needs in This Role<br />This is a tall order — intentionally so.<br />First and foremost, you must have genuine depth in network programming with C and C++.<br />We're particularly interested in engineers with strong working knowledge of Layer 3 OSI protocols, low-level packet analysis and routing, OSPF, TAP/TUN devices and UDP tunnelling, UDP hole punching and STUN technologies, IPTables and packet routing strategies, code threading and multitasking, IPC and shared-memory communication, and Linux kernel-level development.<br />You'll ideally also be comfortable with several of the following areas: compilers and static libraries, cross-compiling and porting across iOS, Android, Windows and Linux, containerised microservices using Docker and Kubernetes, CI/CD and GitLab environments, distributed cloud platforms including AWS, Azure and OVH, and development environments including VS Code, GitLab and Nexus.<br />We don't expect one person to tick every box.<br />What we do need is someone who can demonstrate a high level of competence in networking, packet routing and packet analysis, together with meaningful experience across at least three or four of the areas above.<br />That networking foundation is important.

Without it, the learning curve into the technology will simply be too steep.<br />The Kind of Engineer Who Will Thrive Here<br />You'll probably have 10+ years' experience designing, architecting and developing sophisticated C++ systems, although depth of expertise matters more than an arbitrary number.<br />You'll be comfortable operating in Linux environments, including Debian, CentOS and embedded variants, and ideally understand symmetric and asymmetric cryptography, hashing and secure distributed systems.<br />More importantly, you'll be someone who enjoys getting underneath a problem.<br />Someone who wants to understand what is actually happening to the packet, rather than simply calling an abstraction several layers above it.<br />You'll document clearly, automate where it makes sense, challenge assumptions constructively and be comfortable working in an environment where engineers are expected to think rather than simply execute tickets.<br />Previous start-up, IoT, edge computing, GPU/AI or blockchain experience would be useful, but isn't essential.<br />Why This Matters<br />Nine years in, this is no longer an academic experiment.<br />It isn't a concept.<br />It isn't a slide deck.<br />And it isn't another IoT start-up promising to change the world with an idea.<br />There is patented technology, years of engineering behind it and a platform being prepared for much wider adoption.<br />The next stage is about scale.<br />The successful engineers won't simply be writing C++ code.

They'll be helping determine how machines authenticate, communicate and establish trust across industrial systems, critical infrastructure and other highly secure environments.<br />You'll receive a competitive base salary plus significant equity, reflecting the opportunity to join at a stage where your contribution can still materially influence both the technology and the company's future.<br />The role is permanent and fully remote.<br />If you're a serious low-level C++ engineer who understands packets, routing, tunnelling and network behaviour — and the idea of taking technology from Oxford research roots towards global security infrastructure sounds more interesting than another conventional development role — I'd like to hear from you.<br />Edison Hill Search are operating and advertising as an Employment Agency for permanent positions and as an Employment Business for interim / contract / temporary positions.

Edison Hill Search are an Equal Opportunities employer and we encourage applicants from all backgrounds