Senior Backend Developer (IP / Cloud Telephony / Voice AI) - BM

Job Description

Experience: 38 Years

Location: Bengaluru (Work from Office)

Team: Blue Machines Apnas Agentic AI Platform

About Blue Machines

Blue Machines by Apna is building the next generation of large-scale Voice & AI Agent Infrastructure, powering millions of real-time conversations, interviews, and workflow automations across industries. Our platform handles Tens of millions of voice minutes and integrates deeply with telephony, AI models, and real-time streaming systems all built for scale, reliability, and intelligence.

Role Overview

Were looking for a Senior Software Engineer (Backend) who can design and build high-scale, low-latency systems for our AI and voice platform. The ideal candidate will have strong backend engineering fundamentals, experience with distributed systems, and curiosity about Voice AI, WebRTC, and SIP-based integrations.

Responsibilities

• Design and develop scalable microservices and backend systems that power real-time AI and voice workflows.
• Own end-to-end system design from architecture, APIs, and data models to deployment and monitoring.
• Optimize systems for performance, concurrency, and fault tolerance at high scale.
• Implement best practices for observability, testing, and resilience (Datadog, Sentry, etc.).
• Collaborate with product and AI teams to evolve the platforms multi-agent orchestration and automation layer.

Must-Have Skills

• 36 years of backend development experience in Python or Java.
• Strong grasp of system design, concurrency, and distributed systems.
• Experience building scalable, high-availability APIs or streaming systems.
• Familiarity with WebRTC, SIP, RTP, or other real-time communication protocols.
• Experience with cloud environments (GCP/AWS) and containerized deployments (Kubernetes, Docker).
• Sound understanding of databases (MongoDB, Redis, Postgres) and message queues (Kafka, Pub/Sub).

Good to Have

• Exposure to Voice AI, Speech Processing, or AI Agent frameworks.
• Experience integrating LLMs, vector DBs, or real-time AI inference systems.
• Prior work on AI-driven or telephony-driven platforms at scale.

Why Join Us

• Work on Indias largest Voice AI and Agentic Automation platform, shaping how enterprises interact with AI.
• Collaborate with a world-class team building scalable real-time systems that push latency and reliability limits.
• Opportunity to grow into architecture, infra, or AI platform leadership roles as Blue Machines scales globally.