About this role
Salary: £45,000 - 70,000 per year
Requirements: Strong commercial Java development experienceExperience with SIP, VoIP, RTP/RTCP and SDPKnowledge of JAIN SLEE and/or SIP Servlet frameworksExperience with FreeSWITCH or AsteriskCloud experience across AWS, Azure or GCPStrong troubleshooting skills within telecoms or voice environmentsDocker and KubernetesWebRTCTelecoms security protocols including TLS and SRTPMetaswitch Rhino SLEE or Oracle OCCAS experience Responsibilities: Developing and enhancing SIP-based voice applications using JavaWorking with JAIN SLEE and SIP Servlet frameworksSupporting and integrating voice platforms including FreeSWITCH and AsteriskDeploying and supporting solutions across AWS, Azure and GCPIntegrating Speech-to-Text, Text-to-Speech and AI-driven voice servicesTroubleshooting voice quality, call routing and network performance issues Technologies: AIAWSAsteriskAzureCloudDockerGCPJavaKubernetesNetworkOracleSecurity More:
We are a leading telecoms company seeking an experienced Java Developer to join our team delivering next-generation voice and communications platforms. This is a 6 month contract role based in Ipswich with a hybrid working arrangement and is inside IR35. You will work on large-scale telecoms services, cloud technologies and AI-powered voice solutions in a dynamic environment.
last updated 35 week of 2026