Software Developer

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