Fonada
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Spring BootRole Overview
We are looking for a hands-on Senior Telephony Engineer who actively writes production-grade code and has deep experience with Asterisk-based systems, Java backend development, and high-scale dialler platforms.
Key Responsibilities
This is NOT an architecture-only role we need someone who can:
- Write code
- Debug real-time call issues
- Build and optimize telephony flows end-to-end
- Key Responsibilities (Hands-on Coding Focus)
- Develop and maintain Asterisk dialplans, AGI scripts, and call flows
- Build Java-based backend services for telephony control and orchestration
- Implement and optimize predictive / preview / progressive diallers
- Integrate telephony stack with:
Kafka
RabbitMQ
- Write scalable code for call routing, retry logic, and queue handling
- Work directly on SIP signalling, RTP flows, and debugging call issues
- Handle real-time call events, CDR processing, and logging pipelines
- Optimize systems for high concurrency (thousands of parallel calls)
- Debug production issues like:
Call drops
Latency
One-way audio
SIP failures
Qualifications & Skills
- Bachelors degree in Computer Engineering; Masters is a plus.
- Telephony (Core Requirement)
- Strong hands-on experience with Asterisk
- Deep knowledge of:
SIP / RTP / VoIP
Dialplans
AGI / AMI
- Experience building or maintaining dialers (very important)
- Backend Development
- Strong coding skills in Java (Spring Boot preferred)
- Experience building microservices / APIs
- Comfortable writing high-performance, low-latency code
- Messaging & Event Systems
- Hands-on experience with:
Apache Kafka
RabbitMQ
- Ability to implement event-driven systems
- Scaling & Performance
- Experience handling high call volumes (1000+ concurrent calls)
Understanding of:
- Multi-threading
- Queue management
- Load handling
- Good to Have
- Experience with predictive dialers
- Exposure to WebRTC / real-time communication
- Experience with Docker / Kubernetes
- Understanding of TRAI / Indian telecom ecosystem
- Experience with FreeSWITCH (bonus)
What We Are NOT Looking For
- Pure solution architects who dont code
- People with only theoretical telecom knowledge
- Candidates without real dialer / Asterisk production experience
What We Are Looking For
Someone who has:
- Written real dialplans and backend code
- Debugged live call issues
- Worked on production telephony systems
- A problem solver who can go deep into logs, packets, and code
Impact of the Role
You will directly contribute to building a high-scale telephony + AI voice platform, working on real-time systems that handle thousands of concurrent calls.
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