Principal Engineer (Voice & Messaging)

What will you do?

• Influence the product roadmap as a technical leader
• Exploration and adoption of new technologies to improve system reliability and efficiency.
• Technical guidance and mentoring to the Project teams on architecture and design.
• Help enforce and/or tweak SLAs for existing deployments to improve efficiency.
• Build and improve, and enforce processes to improve efficiency.
• Build and guide the team for operational excellence.
• Stakeholder management
• Mentor junior engineers in the team.

What do we look for?

Must Haves

• 8+ years of experience in the VoIP domain.
• Bachelor's or Master's degree in computer science or equivalent.
• Solid knowledge of VoIP domain technologies, including SIP, SDP, RTP, RTCP.
• Solid knowledge of IP networking concepts, including L2/L3 routing, Subnets, VLANs, and NAT traversal.
• Solid knowledge of network impairments and their impact on call quality.
• Experience leading project teams to deliver critical software solutions.
• 6+ years of experience in building high-availability, scalable and fault-tolerant VoIP systems.
• 4+ years of experience in working with server-side VoIP applications like Asterisk, Kamailio or equivalent
• 3+ years of experience in working with a major cloud platform like AWS (preferred), GCP, or Azure.
• 2+ years of experience in the design and development of REST-based microservices.
• Experience in programming with one of Golang (preferred), Ruby, C/C++
• Experience in scripting with shell and Python
• Experience with data stores such as MySQL, Postgres
• Good understanding of data structures, multi-threading and concurrency concepts.
• Proficiency in working in a 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 Have

• Experience with custom development on Asterisk/Freeswitch/Kamailio/Opensips is a plus
• Experience with SIPp or any other SIP testing tools
• Experience with ISDN, WebRTC technologies
• Experience with Elastic Search queries and visualisation tools like Grafana, Kibana
• Experience with DevOps tools like Ansible, Jenkins, Terraform, Kubernetes, Git
• Experience with monitoring frameworks like Nagios, Prometheus
• Experience with developing Android, iOS-based VoIP clients
• Experience with Java, JavaScript languages