Senior Lead Engineer

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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. Your daily duties will include implementing different SIP proxy features using Asterisk with respect to high availability and scalability.
You will work with automated CI/CD processes and get a chance to improve your knowledge in cloud infrastructure and networks.
Debug and fix issues inside Asterisk core, modules, and C-based extensions
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
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). Have at least 7+ years of production experience with large-scale deployments (call servers with 60k+ active users)
~ Have contributions in experience with CI/CD, clouds,



Linux & networking
~ Have a good level of English (B2 or higher)
~(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

Remote work flexibility - work from anywhere
B2B contract with competitive gross compensation in USD
Really good hardware
Continuous learning and career growth opportunities with annual performance review
Compensation for professional training, seminars, and conferences
Company-supported English classes to enhance your professional growth
A few words about us: IDT Corporation is a global communications company founded in 1990 and headquartered in Newark, New Jersey. We are industry leaders in prepaid communication and payment services and one of the largest international voice carriers. We are not "another big IT corporation"— we encourage and support in-

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