More jobs:
Java Developer
Job in
Ipswich, Suffolk County, IP1, England, UK
Listed on 2026-08-29
Listing for:
Adecco
Full Time
position Listed on 2026-08-29
Job specializations:
-
Software Development
Java Developer, Cloud Engineer - Software
Job Description & How to Apply Below
Java Developer (SIP/VoIP)
Ipswich (Hybrid) | 6 Month Contract | Inside IR35
My 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 Doing- Developing and enhancing SIP-based voice applications using Java
- Working with JAIN SLEE and SIP Servlet frameworks
- Supporting and integrating voice platforms including Free SWITCH and Asterisk
- Deploying and supporting solutions across AWS, Azure and GCP
- Integrating Speech-to-Text, Text-to-Speech and AI-driven voice services
- Troubleshooting voice quality, call routing and network performance issues
- Strong commercial Java development experience
- Experience with SIP, VoIP, RTP/RTCP and SDP
- Knowledge of JAIN SLEE and/or SIP Servlet frameworks
- Experience with Free SWITCH or Asterisk
- Cloud experience across AWS, Azure or GCP
- Strong troubleshooting skills within telecoms or voice environments
- Docker and Kubernetes
- WebRTC
- Telecoms security protocols including TLS and SRTP
- Metaswitch Rhino SLEE or Oracle OCCAS experience
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