Software Development Engineer III
First seen by Alion on Sep 25, 2026.
About us :
Exotel is one of Asia's largest customer communication platforms.
We are on a mission to move enterprise customer communication to the cloud.
In 2020, we powered over 4 billion calls and connected over 320 million people. We work with some of the most innovative companies such as Ola, Swiggy, Zerodha, Whitehat Jr, Practo, Flipkart, GoJek, etc.
We also power customer communication for some of the top banks in the country.
Join us on this journey to make a difference in how companies look at customer communication.
Read our growth story here.
Tech @ Exotel :
Exotel engineering solves some really cool infrastructure level problems with the goal of ensuring no one misses a call or an SMS.
Our focus is on building a very fault-tolerant, loosely coupled, scalable and real-time distributed system.
We are generally agnostic of language, technology or tools.
Currently, our tech stack is built on Golang, Node.js, Ruby, Java and PHP.
We use Aerospike, MySQL as data stores, ElasticSearch for search and Beanstalkd for queuing.
We emphasize a lot on clean abstractions of code, loosely coupled services and good coding practices. We are very strong believers in "you built it, you own it!".
And running a distributed system is very different from just building one!
We are crazy about the high availability.
What you will do?
- Lead projects related to Exotel's telephony and VoIP stack.
- Responsible for driving projects throughout its lifecycle.
- Work with a team of engineers to explore, design, develop, test, deploy, and operationalize a product's features & improvements.
- Build fault-tolerant, scalable and real-time distributed voip system.
- Effectively work in a collaborative and agile team environment.
- Support team with timely analysis and debugging of operational issues.
- Be on rotational on-call roster to handle operational issues.
- Emphasis on automation and scripting.
- Mentor junior engineers in the team.
What we look for?
Must Haves :
- Bachelors or Masters degree in Computer Science or Communications Engineering.
- Experience leading project team to deliver critical software solutions.
- 3+ years experience in working with a major cloud platform like AWS (preferred), GCP, Azure.
- 5+ years experience in design and development of REST-based microservices.
- 4+ Experience in programming with one of Golang (preferred), Ruby, C/C++.
- Experience in scripting with shell, python.
- Experience with datastores such as MySQL, Postgres.
- Experience with DevOps tools like Ansible, Jenkins, Terraform, kubernetes, Git.
- Good understanding of data structures, multi-threading and concurrency concepts.
- Proficiency in working in Linux environment.
- Experience working in Agile SDLC process.
- Strong analytical, problem solving and troubleshooting skills.
- Excellent written and verbal communication skills.
- Team-player, flexible and able to work in a fast-paced environment.
- A "devops" mindset. You own what you will develop.
Good to Haves :
- Experience with custom development on Asterisk/Freeswitch/Kamailio/Opensips is a plus.
- Experience with SIP or any other SIP testing tools.
- Experience with ISDN, WebRTC technologies.
- Experience with elasticsearch queries and visualization tools like grafana, kibana.
- Experience with monitoring frameworks like Nagios, Prometheus.
- Experience with developing Android, iOS based voip clients.
- Experience with Java, Javascript languages.
- Knowledge on VoIP domain technologies including SIP, SDP, RTP, RTCP.
Skills
IP Telephony, VoIP, AWS, Azure, Golang, Microservices Architecture, Scripting, Ansible, Terraform, Linux, Asterisk