Software Engineer (Voice services/JAIN SLEE)

Job Title: Software Engineer (Voice services/JAIN SLEE)

Location: Ipswich (Hybrid)

Role Type: Contract

We are seeking a Voice Services Developer to build, maintain, and optimize next-generation communication platforms by bridging telecommunication protocols with cloud-based AI.

Key Responsibilities:

SIP Development: Develop, test, and maintain SIP-based voice services using Java, JAIN SLEE, and SIP Servlets.

Media Server Administration: Configure, manage, and scale FreeSWITCH or Asterisk communication engines.

Speech AI Integration: Implement STT, TTS, and NLP workflows into live voice streams.

Cloud Operations: Deploy and monitor voice applications across AWS, Azure, and GCP.

Troubleshooting: Use network analysis tools to diagnose audio quality issues, call drops, and latency problems.

Team Collaboration: Work alongside architects and DevOps teams to roll out scalable conversational AI bots.

Required Skills & Qualifications:

Core Java: Professional Java experience, including multi-threading, network programming, JAIN SLEE, and 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, GCP Speech-to-Text).

Multi-Cloud: Experience deploying and managing applications on AWS, Azure, and GCP.

Tools: Proficiency with Wireshark or sngrep for VoIP troubleshooting.

Preferred Qualifications

Experience with Metaswitch Rhino SLEE or Oracle OCCAS.

Understanding of Docker, Kubernetes, WebRTC, and telephony security standards (TLS/SRTP).