Software Developer ( SIP / VoIP) £60,000 - £65,000 Progression Training Company Benefits Hybrid Working Guildford Are you a Software Developer with a background VoIP / SIP looking to work on a highly technical, enterprise-level communications platform where you'll tackle real-time systems, complex integrations, and challenging problem-solving rather than standard web applications? On offer is the chance to join an award-winning technology business with over 40 years of industry experience, known for innovation, in-house development and long-term customer partnerships. The company provides excellent training, exposure to cutting-edge technologies, and clear opportunities for progression within a small, highly skilled development team. In this role you will design, develop and enhance a large-scale SIP and VoIP platform along with its associated REST APIs and value-add services. You'll work closely with internal teams and customers to build integrations with external systems, including AI-driven voice, transcription and sentiment analysis services. You will also play a key role in troubleshooting complex SIP/RTP issues and ensuring secure, compliant software design throughout the platform. This role would suit a Software Developer with a background in VoIP / SIP, real-time communications, and secure software design who wants to work on technically demanding projects with real-world impact. The Role: Developing and improving a SIP / VoIP communications platform Integrating external systems including AI-based voice services Troubleshooting SIP/RTP issues using tools such as Wireshark Ensuring secure software design and compliance standardsThe Person: Software Developer or similar Understanding of SIP / VoIP and real-time systems Experience with REST APIs, Docker and Linux Commutable to GuildfordJob Reference: BBBH23456 Keywords: Software Developer, Senior Developer, Python, SIP, VoIP, RTP, REST APIs, Backend, Linux, Docker, Communications, Guildford, Surrey