https://jobs.co.uk/job/java-developer-adecco--9e318026-beda-467c-b947-d09b7a6e0117 RSS feed for Java Developer at Adecco. en-gb Wed, 26 Aug 2026 00:21:34 GMT https://jobs.co.uk/job/java-developer-adecco--9e318026-beda-467c-b947-d09b7a6e0117 https://jobs.co.uk/job/java-developer-adecco--9e318026-beda-467c-b947-d09b7a6e0117 Tue, 25 Aug 2026 11:56:25 GMT Location: Ipswich | Salary: 10000-500000 Annual | Type: Contract | Java Developer (SIP/VoIP)Ipswich (Hybrid) 6 Month Contract Inside IR35My client, a leading telecoms company, is looking for an experienced Java Developer to join a team delivering next-generation voice and communications platforms. This is an exciting opportunity to work on large-scale telecoms services, cloud technologies and AI-powered voice solutions.What You''ll Be DoingDeveloping 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 issuesEssential SkillsStrong 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 environmentsNice to HaveDocker and KubernetesWebRTCTelecoms security protocols including TLS and SRTPMetaswitch Rhino SLEE or Oracle OCCAS ... Contract