Senior C++ Developer

Working with a company that leverages patented cryptographic technology to enable fully decentralised, post-quantum secure interoperability between devices operating at the edge. Their solutions originated from Oxford research and are now commercially relevant, poised for global application in industrial systems.

The Role

• Design and build low-level, network-centric C and C++ engineering around OSI Layers 2 and 3.
• Focus on secure cloud-to-edge communication, device-to-device authentication, decentralised routing, and secure communication across untrusted networks.
• Influence architectural decisions and contribute to security infrastructure for critical systems globally.
• Operate deep within the network stack, addressing packet behaviour, routing decisions, and tunnelling strategies.
• Develop technology intended for millions of industrial edge devices, ensuring robust deployment and configuration.

What You’ll Need

• Genuine depth in network programming with C and C++.
• Strong working knowledge of Layer 3 OSI protocols, low-level packet analysis, routing (OSPF), TAP/TUN devices, and UDP tunnelling/hole punching.
• Experience with IPTables, packet routing strategies, code threading, multitasking, IPC, shared-memory communication, and Linux kernel-level development.
• Comfort with Linux environments (Debian, CentOS, embedded variants) and ideally understanding of cryptography and secure distributed systems.
• Ability to demonstrate a high level of competence in networking, packet routing, and packet analysis, with meaningful experience in at least three to four key areas.

What’s On Offer

• Significant equity alongside a competitive base salary.
• Opportunity to make a material impact on technology and the company’s future.
• Be part of a small, specialist engineering team where your contributions are highly visible.

Apply via Haystack today!