Rubicon Consulting is currently recruiting for a Software Developer on a 4+ year contract based in Suffolk.
Role Summary
We are seeking a Voice Services Developer to build, maintain, and optimize our next-
generation communication platforms. You will bridge the gap between traditional
telecommunication protocols and modern cloud-based AI. Your core focus will be developing
stable SIP services using Java, managing open-source media engines, and integrating advanced
Speech AI technologies across multi-cloud environments.
Key Responsibilities
· SIP Development: Develop, test, and maintain mid-to-high performance SIP-based voice
services using JAIN SLEE, SIP Servlets.
· Media Server Administration: Configure, manage, and scale FreeSWITCH or Asterisk
communication engines.
· Speech AI Integration: Implement Speech-to-Text (STT), Text-to-Speech (TTS), and Natural
Language Processing (NLP) workflows into live voice streams.
· Cloud Operations: Deploy and monitor voice applications across AWS, Azure, and Google
Cloud Platform (GCP).
· Troubleshooting: Use network analysis tools to diagnose audio quality issues, call drops,
and latency problems.
· Team Collaboration: Work alongside senior architects and DevOps teams to roll out
scalable conversational AI bots.
Requirements:
· Core Language: Professional experience with Java, including multi-threading and network
programming.
· In depth knowledge of Java
· Good knowledge of java applications using JAIN SLEE framework, SIP Servlet Frameworks
· Telephony Engines: Hands-on experience configuring and scripting with FreeSWITCH or Asterisk.
· Voice Protocols: Solid understanding of SIP, RTP/RTCP, and SDP.
· Speech AI: Experience integrating cloud speech APIs (e.g., AWS Transcribe/Polly, Azure Speech, Google Cloud Speech-to-Text).
· Multi-Cloud Exposure: Experience deploying and managing applications on AWS, Azure, and GCP.
· Tools: Proficiency with Wireshark or sngrep for VoIP troubleshooting.
Preferred Qualifications
· Experience with Java telephony frameworks like Metaswitch Rhino SLEE or Oracle OCCAS.
· Understanding of containerisation using Docker and Kubernetes in cloud environments.
· Knowledge of WebRTC and telephony security standards like TLS and SRTP.
Our Company
Rubicon Consulting is a Talent management consultancy which helps you to optimise business performance and competitive advantage by choosing the right people first time
Cavenham
Contract
Posted 4 days ago 
