Software Engineer (Voice services/JAIN SLEE)
Job Description
Job Title: Software Engineer (Voice services/JAIN SLEE)
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Location: Ipswich (Hybrid)
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Role Type: Contract
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We are seeking a Voice Services Developer to build, maintain, and optimize next-generation communication platforms by bridging telecommunication protocols with cloud-based AI.
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Key Responsibilities:
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SIP Development: Develop, test, and maintain SIP-based voice services using Java, JAIN SLEE, and SIP Servlets.
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Media Server Administration: Configure, manage, and scale FreeSWITCH or Asterisk communication engines.
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Speech AI Integration: Implement STT, TTS, and NLP workflows into live voice streams.
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Cloud Operations: Deploy and monitor voice applications across AWS, Azure, and GCP.
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Troubleshooting: Use network analysis tools to diagnose audio quality issues, call drops, and latency problems.
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Team Collaboration: Work alongside architects and DevOps teams to roll out scalable conversational AI bots.
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Required Skills & Qualifications:
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Core Java: Professional Java experience, including multi-threading, network programming, JAIN SLEE, and SIP Servlet frameworks.
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Telephony Engines: Hands-on experience configuring and scripting with FreeSWITCH or Asterisk.
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Voice Protocols: Solid understanding of SIP, RTP/RTCP, and SDP.
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Speech AI: Experience integrating cloud speech APIs (e.g., AWS Transcribe/Polly, Azure Speech, GCP Speech-to-Text).
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Multi-Cloud: Experience deploying and managing applications on AWS, Azure, and GCP.
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Tools: Proficiency with Wireshark or sngrep for VoIP troubleshooting.
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Preferred Qualifications
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Experience with Metaswitch Rhino SLEE or Oracle OCCAS.
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Understanding of Docker, Kubernetes, WebRTC, and telephony security standards (TLS/SRTP).