Voice AI Developer

BSG is a Communication Platform as a Service (CPaaS) that helps businesses connect with customers across multiple channels through flexible, cloud-based communication solutions. We are looking for a strong backend/software engineer who can design and build scalable production Voice AI systems, with a focus on distributed systems, real-time processing, asynchronous architecture, streaming, and low-latency voice interactions. Current tech stack: Python, FastAPI, Django, RabbitMQ, Memcached, JavaScript, REST, WebSocket, AI/Voice APIs. Your Responsibilities - Design and develop production-grade Voice AI systems and backend services. - Build the full voice pipeline: Audio STT/ASR LLM TTS Audio. - Integrate external and self-hosted AI/Voice models and APIs. - Build real-time streaming services for bidirectional voice conversations. - Work with streaming STT, LLM and TTS and optimize end-to-end latency and time-to-first-audio. - Implement conversation state, context management and interruption/barge-in handling. - Integrate Voice AI with telephony, telecom and business systems. - Develop APIs and asynchronous, event-driven services using message brokers. - Ensure high performance, reliability, scalability and observability of production systems. - Monitor and analyze latency, recognition quality, voice quality, errors and conversation stability. - Design solutions capable of supporting high volumes of concurrent calls. - Participate in architecture decisions, code reviews and technical improvements across projects. What We Expect - 5+ years of commercial backend/software development experience. - Strong proficiency in Python, Go, Java, Node.js/TypeScript, C# or another modern backend language. - Solid understanding of OOP, APIs, concurrency and asynchronous programming. - Experience building and maintaining production-grade backend services. - Strong understanding of distributed systems and event-driven architecture. - Experience with REST APIs, WebSockets and real-time/streaming systems. - Experience with message brokers such as RabbitMQ or Redis. - Ability to work with a new programming language and technology stack; Python is a strong advantage as it is the primary backend language in the current stack. - Experience integrating external APIs, ideally including AI/LLM/Voice APIs. - Understanding of Docker, CI/CD, monitoring and logging. - Ability to design scalable, reliable and observable systems. Nice to Have - Voice AI / conversational AI / Speech-to-Speech - STT / ASR / TTS / LLM - SIP, VoIP, WebRTC, RTP or SIP trunking - Asterisk, FreeSWITCH or similar telephony platforms - Real-time audio processing and codecs - Low-latency real-time systems - Call-center or telecom infrastructure - Experience with self-hosted AI models What We Offer - Fully remote work with a flexible schedule. - Competitive salary and 24 days of paid vacation. - A technically strong team open to innovation and collaboration. - Work on AI and communication products for the global market. - Professional growth and participation in complex, technically challenging projects. Originally posted on Himalayas