Contract
Software Engineering Specialist (Voice/JAIN SLEE)
Randstad Technologies Recruitment
Ipswich
Posted: 26 August 2026 (Today)
Closing date: 25 September 2026
Ref: 225536321
I am currently seeking a Voice Services Developer for an exciting project with an enterprise voice development team. Given your strong background in Java and telephony systems, I thought this might be a great fit.
Quick Highlights:
- Focus: Developing, testing, and maintaining mid-to-high performance SIP-based voice services using Java (JAIN SLEE, SIP Servlets) and integrating advanced Speech AI technologies across multi-cloud environments.
- Environment: Agile, cross-functional delivery unit configuring media engines like FreeSWITCH or Asterisk, analyzing network traffic, and deploying conversational AI bots alongside senior architects and DevOps teams.
- Requirements: Professional Java experience (including multi-threading and network programming), hands-on scripting with FreeSWITCH or Asterisk, deep knowledge of voice protocols (SIP, RTP/RTCP, SDP), and experience with cloud Speech APIs (AWS, Azure, GCP) and Wireshark/sngrep.
This is an urgent vacancy where the hiring manager is shortlisting for an interview immediately. If interested, please share your updated CV with me at manisha. devaruppala @ randstad (url removed), and let''s coordinate a brief call to discuss further.
Best Regards,
Manisha
Randstad Technologies is acting as an Employment Business in relation to this vacancy.
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