Senior Software Engineer - Real-Time Communications Platform

While primarily remote, this role requires occasional visits to the Bristol office or London. We are looking for a Senior Engineer working on a large-scale real-time communications platform. Focus on C++ services, networking, and system reliability. Practical experience in VoIP or PBX systems is desirable.

What you will be doing

• Design, develop, and maintain C++ (C++17+) services
• Implement and troubleshoot networking and real-time communication flows
• Debug complex issues (core dumps, concurrency, performance)
• Work within and evolve a large, existing codebase
• Collaborate with QA and product on behaviour and edge cases
• Participate in code reviews and engineering best practices
• Contribute within Agile processes (Scrum, Jira)

What you will bring to the role

• Strong C++ (C++17 minimum), STL
• Solid networking fundamentals (TCP/UDP, sockets)
• Experience with multithreaded/concurrent systems
• Strong debugging skills (gdb, core dumps)
• Linux development experience
• Ability to understand and maintain complex, legacy systems
• Experience with Agile and Jira/Atlassian tools

Bonus Skills

• Practical experience in VoIP or PBX systems
• VoIP protocols: SIP, RTP/RTCP, SDP, WebRTC
• Telephony/PBX systems: call routing, hunt groups, call park/pickup, feature interaction and state handling
• Boost (especially Boost.Asio)
• GitHub (PR workflows, code reviews)
• AI-assisted development tools (coding, debugging, analysis)
• Kubernetes / containerised environments
• FreeSWITCH
• Network analysis tools (Wireshark, tcpdump)
• Performance profiling and optimisation
• Scripting or Python