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.
