Alexander Spiridonov
Principal Software Engineer at Microsoft
Mountain View, California, United States
Summary
👤
Senior🎓
Top SchoolAlexander Spiridonov is a Principal Software Engineer with 11 years of experience building and operating geo-distributed backend services for Microsoft 365, specializing in core people and profile microservices that serve millions of users. He has progressed from hands-on systems and VoIP engineering to leading teams that deliver low-cost, secure, and compliant profile and visual identity platforms across M365 and Windows. Alexander combines deep low-level experience (C/C++ work on Kamailio and SIP systems) with cloud-native design and Kubernetes-based deployments, having driven modernization efforts and cross-org integrations. He is pragmatic about cost, privacy, and incident readiness, and has a track record of refactoring legacy codebases to modern standards in open-source projects. Based in Mountain View, he blends operator mentality with product-focused leadership, equally comfortable shipping critical runtime services and guiding partner onboarding across large organizations.
11 years of coding experience
16 years of employment as a software developer
CE Information security, CE Information security at Izhevsk State Technical University (ISTU)
Github Skills (9)
telephony10
sips10
kamailio10
voip10
sip10
c119
c179
configuration-management8
database-design7
Programming languages (2)
Github contributions (5)
kamailio/kamailio
Jul 2014 - Apr 2016
Kamailio - The Open Source SIP Server for large VoIP and real-time communication platforms -
Role in this project:
Back-end Developer
Back-end DeveloperContributions:127 commits, 1 PR, 12 comments in 1 year 9 months
Contributions summary:Alexander's contributions focused on refactoring and modernizing the codebase by replacing deprecated string parameters with their updated counterparts. They primarily worked across various modules within the Kamailio SIP server, specifically impacting parameter exports related to database configuration, logging, and other module-specific settings. These changes appear to be aimed at improving code maintainability and adapting to evolving project standards by using new parameters.
voltesip-serverkamailiofreeswitchchat
sipidronov/kamailio
Apr 2016 - Sep 2016
Contributions:2 pushes, 1 branch in 4 months
kamailiosipsip-server
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