SE-3 (Tel & IP)

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
• Solid knowledge on VoIP domain technologies including SIP, SDP, RTP, RTCP.
• Solid knowledge on IP networking concepts and L2/L3 routing including Subnets, VLAN, NAT Traversal (ICE/STUN).
• Experience leading project team to deliver critical software solutions
• 3+ years experience in high-availability, scalable and fault tolerant voip infrastructure.
• 3+ years experience in working with server-side voip infrastructure components like Asterisk/Freeswitch, Kamailio/Opensips. including understanding of stack internals
• 3+ years experience in working with a major cloud platform like AWS (preferred), GCP, Azure.
• 2+ years experience in design and development of REST-based microservices.
• 2+ Experience with WebRTC
• 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