SDE II, Backend — Voice AI & Telephony

Experience: 2-4 Years

Location: Bengaluru (Work from Office)

Team: Blue Machines

Role Overview

We're looking for an SDE II (Backend) to help build high-scale, low-latency systems for our AI and voice platform. You'll work on real-time backend systems that power live voice conversations — combining strong backend fundamentals with exposure to WebRTC, SIP-based telephony, and Voice AI.

Responsibilities

Build and maintain scalable microservices and backend systems that power real-time AI and voice workflows
Contribute to system design — APIs, data models, deployment, and monitoring — alongside senior engineers
Write performant, concurrent, fault-tolerant code at scale
Implement observability and testing best practices (Datadog, Sentry, etc.)
Collaborate with product and AI teams on the platform's multi-agent orchestration and automation layer
Partner closely with the ML team to integrate in-house models, support benchmarking and observability, and help build the next generation of in-house AI models

Requirements

Must-Have Skills

2-4 years of backend development experience in Python or Java
Strong grasp of system design, concurrency, and distributed systems
Experience building scalable APIs or streaming systems
Familiarity with WebRTC, SIP, RTP, or other real-time communication protocols
Experience working with Voice AI or speech processing systems (ASR/TTS, real-time inference)
Experience integrating LLMs, vector DBs, or AI agent frameworks into production systems
Experience with cloud environments (GCP/AWS) and containerized deployments (Kubernetes, Docker)
Sound understanding of databases (MongoDB, Redis, Postgres) and message queues (Kafka, Pub/Sub)
Collaborate with product and AI teams to evolve the platform's multi-agent orchestration and automation layer

Backend Engineer - SDE 2 (Voice AI / Telephony Platform)