Voice Services Developer

About The Company Rubicon Consulting is a premier talent management consultancy dedicated to helping organizations optimize their business performance and gain a competitive edge through strategic talent acquisition. With a proven track record of sourcing and placing top-tier professionals across various industries, Rubicon Consulting prides itself on understanding client needs and delivering tailored recruitment solutions. Our commitment to excellence and integrity ensures that both clients and candidates receive exceptional service, fostering long-term partnerships and organizational success. About The Role We are currently seeking a highly skilled Voice Services Developer to join our dynamic team on a 4+ year contract based in Suffolk. The ideal candidate will play a critical role in building, maintaining, and optimizing next-generation communication platforms that integrate traditional telecommunication protocols with modern cloud-based AI technologies. This role requires a deep understanding of SIP-based voice services, media engine management, and speech AI integration across multiple cloud environments. The successful applicant will collaborate closely with senior architects and DevOps teams to develop scalable, reliable, and innovative voice solutions that enhance our communication infrastructure and customer experience. Qualifications The ideal candidate should possess professional experience with Java programming, including expertise in multi-threading and network programming. A solid understanding of Java applications utilizing JAIN SLEE framework and SIP Servlet frameworks is essential. Hands-on experience configuring and scripting telephony engines such as FreeSWITCH or Asterisk is required, along with a comprehensive knowledge of voice protocols like SIP, RTP/RTCP, and SDP. Familiarity with cloud speech APIs such as AWS Transcribe/Polly, Azure Speech, and Google Cloud Speech-to-Text is necessary. Candidates should also have experience deploying and managing applications across AWS, Azure, and Google Cloud Platform (GCP). Proficiency with VoIP troubleshooting tools like Wireshark or sngrep is expected. Preferred qualifications include experience with Java telephony frameworks like Metaswitch Rhino SLEE or Oracle OCCAS, understanding of containerization using Docker and Kubernetes, and knowledge of WebRTC and telephony security standards such as TLS and SRTP. Responsibilities Develop, test, and maintain high-performance SIP-based voice services leveraging frameworks such as JAIN SLEE and SIP Servlets to ensure robust communication capabilities. Configure, manage, and optimize media servers like FreeSWITCH or Asterisk, ensuring seamless operation and scalability of telephony engines. Integrate Speech-to-Text (STT), Text-to-Speech (TTS), and Natural Language Processing (NLP) workflows into live voice streams, enhancing conversational AI functionalities. Deploy and monitor voice applications across multiple cloud platforms including AWS, Azure, and Google Cloud Platform, ensuring high availability and performance. Utilize network analysis tools such as Wireshark or sngrep to diagnose and resolve audio quality issues, call drops, and latency problems effectively. Collaborate with senior architects and DevOps teams to design and implement scalable conversational AI bots, ensuring seamless integration with existing systems. Maintain documentation of development processes, configurations, and troubleshooting procedures to facilitate ongoing support and knowledge sharing. Stay updated with emerging technologies in telecommunication protocols, cloud computing, and AI integration to continuously improve platform capabilities. Benefits Rubicon Consulting offers a competitive benefits package that includes comprehensive health insurance, retirement plans, and paid time off. Employees will have access to ongoing training and professional development opportunities to enhance their skills and career growth. The company fosters a collaborative and innovative work environment, encouraging continuous learning and knowledge sharing. Additionally, team members will benefit from flexible working arrangements and a supportive organizational culture that values diversity and inclusion. Equal Opportunity Rubicon Consulting is an equal opportunity employer. We celebrate diversity and are committed to creating an inclusive environment for all employees. All qualified applicants will receive consideration for employment without regard to race, color, religion, gender, gender identity or expression, sexual orientation, national origin, age, disability, or any other protected status under applicable law. We believe that a diverse workforce enhances our ability to serve our clients and fosters a vibrant, innovative workplace.