Simon Castle
Senior Software Engineer at Alianza
London, England, United Kingdom
Summary
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Senior🎓
Top SchoolSimon Castle is a Senior Software Engineer with 15 years' deep domain experience in routing protocols and telephony caller verification, currently leading the technical and product development of a Tier 1 US-deployed STIR-SHAKEN solution. An IETF and ATIS standards expert, he combines cryptographic certificate knowledge with hands-on Rust development and a background in OSPF and Layer 3 routing. He has a proven track record at Metaswitch, Microsoft and Alianza shepherding products from core protocol design to carrier-grade deployments, often acting as scrum lead, mentor and customer-facing support. Comfortable across C, C++, Scala and Python, he also brings operational expertise with Kubernetes, Docker, GitLab, Grafana and packet-level diagnostics like Wireshark. A first-class mathematics graduate from Durham, he pairs rigorous analytical thinking with clear, precise communication to solve complex telecom interoperability challenges.
6 years of coding experience
15 years of employment as a software developer
Master's degree, Mathematics, First Class with Honours, Master's degree, Mathematics, First Class with Honours at Durham UniversityGithub contributions (1)
CastleQuirm/AdventOfCode
Apr 2020 - Dec 2022
Contributions:144 commits in 2 years 8 months
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