Senior/Lead Asterisk Developer

We’re looking for a Senior/Lead Asterisk Developer to help us build and scale a cloud PBX solution based on Asterisk.
The team is building a cloud PBX solution based on Asterisk. We expect you to have strong problem-solving skills, be self-motivated, initiative, and responsible.
Your daily duties will include implementing different SIP proxy features using Asterisk with respect to high availability and scalability.You are not limited to Asterisk — we welcome you to be involved in all parts of a large ecosystem built around Asterisk.
You will work with automated CI/CD processes and get a chance to improve your knowledge in cloud infrastructure and networks.

In this role, you will also:

• Design and implement advanced Asterisk dialplans.
• Debug and fix issues inside Asterisk core, modules, and C-based extensions.
• Analyze and interpret stack traces, crashes, memory issues, and performance bottlenecks.
• Implement patches, backports, or enhancements directly in Asterisk source code.
• Develop custom modules (C/C++), when needed.
• Apply deep understanding of SIP signaling, RTP, SDP negotiation, codecs, and NAT traversal.
• Troubleshoot SIP flows.
• Work with trunk groups, carriers, PSTN routing, and failover logic.
• Work with Linux systems (systemd, networking, tuning, kernel parameters).
• Work with Asterisk in cloud environments (AWS preferred).Participate in architecture decisions for resilient and scalable telephony clusters.

Join us if you:

• Have at least 7+ years of production experience with large-scale deployments (call servers with 60k+ active users).
• Have contributions in https://github.com/asterisk/asterisk/.
• Have experience with CI/CD, clouds, Linux & networking.
• Have a good level of English (B2 or higher).
• (For Lead level) Are ready to act as the technical lead for the Asterisk domain.
• (For Lead level) Can work cross-team with backend developers, infra/DevOps, QA, and product owners.
• (For Lead level) Own best practices, code quality, and documentation.

We are offer:

• Remote work flexibility – work from anywhere.
• B2B contract with competitive gross compensation in USD.
• Top-tier hardware to support your productivity.
• A challenging role in a team of skilled professionals.
• Continuous learning and career growth opportunities.
• Coverage for professional development: training, seminars, and conferences.
• Access to high-quality English lessons.