
Role 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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Developed in formal collaboration with the University of Cambridge in May 2000, HeyMath! is an Ed-Tech company whose mission is to Raise the Game in Maths for school systems around the world. We do this using technology to deliver engaging teaching methodologies and personalised learning paths for students. HeyMath! has been successfully adopted by CBSE schools since 2004, with positive outcomes for the entire ecosystem.
Check us out at www.heymath.com
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Experience working on Java 8 or above.
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Not just a delivery company
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Future of eCommerce Logistics.
Data driven logistics company that is bringing in same day delivery revolution in Indonesia
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Implementation of security and data protection
Integration of data storage solutions
Strong proficiency with JavaScript
Knowledge of Node.js and frameworks available for it
Understanding the nature of asynchronous programming and its quirks and workarounds
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Basic understanding of front-end technologies, such as HTML5 and CSS3
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Implementing automated testing platforms and unit test
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Experience in working with vendor applications
Experience in making optimized queries to MySQL database
Proven problem solving and analytical skills
A delivery-focused approach to work and the ability to work without direction
Experience in Agile development techniques, including Scrum
Experience implementing and/or using Git
Ability to work collaboratively in teams and develop meaningful relationships to achieve common goals
Bachelor degree in Computer Science or related discipline preferred
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- A small, well-knit team with a bunch of self-driven aces who love their work as well as working here!
- A top notch product spanning web app, mobile app, chatbot and artificial intelligence tech stack
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Education (Candidate should satisfy one of the following)
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- Steep learning curve
- Extensive training on mathematics of derivatives market
- Dynamic work environment(Everyday is different in its own way)
- Very small team and merit based growth
- Best in class Quarterly bonuses and revenue share post training period(where bonus can surpass the base salary)
Pay Structure
- Extensive training period(probation period) of 2 months(Stipend Paid during training period INR 10,000)
- Pay Structure post the training period:
Junior Trader:
Base Salary I + 5% of Revenue share
Senior Trader:
(Base Salary I + 27% hike) + 10% of Revenue Share
Working Hours
We neither believe in staying unnecessary in office if there's nothing productive to be done nor do we believe in long unproductive lunch breaks
- Standard Market Hours
- Training Pre and Post market hours
- Our doors are open till the time you are working
Selection Process
- Quantitative Aptitude Test
- Psychometric Test
- Personal Interview
- Super Day (Hands on work on high paced advance programs)











