Key Responsibilities

1. Backend Development & Architecture

● Design and develop scalable backend services using Node.js.

● Build microservices for telephony, call routing, ACD, WebRTC signaling, IVR workflows,

message queues, and real-time events.

● Implement RESTful APIs, WebSocket-based services, and internal service-to-service

communication.

2. Real-Time Processing (Telephony)

● Work on telephony-related modules:

○ Call logs flow

○ ACD engine

○ WebRTC signaling

○ Real-time call events

○ Agent state transitions

○ Event-driven routing systems

● Optimize latency and concurrency for real-time voice systems.

3. Data Handling & Optimization

● Build and optimize Elasticsearch queries (aggregation, nested, scroll, bulk, time-series

handling).

● Work with MongoDB for high-volume document operations.

● Implement caching layers using Redis, TTL strategies, and pub/sub patterns.

● Handle millions of records efficiently with optimized indexing & data models.

4. Queues, Streaming & Event-Driven Architecture

● Implement and manage high-throughput queues using RabbitMQ or Kafka.

● Build producers/consumers for telephony workflows (call events, call states, CDR

processing, agent events).

5. Interprocess Communication (IPC) & System Programming

● Implement multi-process Node.js apps (cluster mode, worker threads, child processes).

● Strong hold on OS concepts: file descriptors, sockets, event loops, buffers, concurrency

models.

● Write efficient socket-based programs for internal signaling.

6. Performance, Reliability & Scalability

● Optimize code for low latency & high throughput.

● Build retry handling, persistence queues, circuit breakers,



and fail-secure mechanisms.

● Work on large-scale log processing pipelines.

7. Telephony Domain Responsibilities

● Understand call flows, SIP/WebRTC basics (optional but preferred).

● Work on modules like call routing, IVR, call state machine, events pipeline.

● Collaborate with telephony/VoIP teams for API integrations.

8. Monitoring, Debugging & DevOps Collaboration

● Work with DevOps for CI/CD, scaling microservices, and containerization (Docker).

Required Skills & Qualifications

Core Technical Skills

● Node.js (3+ years) with strong fundamentals (events, async, memory, cluster, streams).

● Elasticsearch (indexing, nested fields, aggregations, time-series queries).

● MongoDB (schema design, indexing, pipelines).

● Redis (cache, pub/sub, streams).

● RabbitMQ / Kafka (message queues, routing, consumer groups).

● WebSockets & real-time event systems.

● IPC, socket programming, networking basics.

● Excellent command over algorithms, patterns, data structures, and backend architecture.

Must-Have Knowledge Areas

● Event-driven systems.

● API performance optimization.

● Large-scale data handling.

● Fault-tolerant distributed systems.

● High-concurrency systems.

● Memory management and Node.js internals.

● Working with large JSON data, micro-batching, and queue-based processing.

Good to Have / Preferred

● Experience with Telephony: SIP, RTP, WebRTC signaling, Asterisk/Freeswitch basics.

● Knowledge of microservices architecture & containerization (Docker).

● Experience in building SaaS or CPaaS platforms.

● Exposure to distributed locks, rate-limiting, throttling strategies.

Work Location: In person

📌 MERN Stack Developer (Jaipur)
🏢 Innvocon Learning Solutions
📍 Jaipur