Barrie Mcguire
Principal Software Engineer at PayPal
United Kingdom
Summary
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Rockstar🎓
Top SchoolBarrie Mcguire is a Principal Software Engineer with 11 years of professional experience building large-scale, cloud-native systems and distributed streaming platforms across finance, media and government. He has led architecture and implementation of high-traffic identity and streaming services (Disney+, SiriusXM) and designed secure, certified analytics platforms for government use, combining Scala, functional programming (Cats, HTTP4S, Doobie) and AWS/Kubernetes best practices. Comfortable from low-level Delphi/Win32 work to modern microservices, he frequently architects multi-region event pipelines, multi-tenant identity models and production-grade CI/CD and IaC. At SiriusXM and PayPal he influenced CTO-level decisions while still shipping prototypes and core services, showing a blend of strategic leadership and hands-on delivery. Known for pragmatic functional design—custom monad transformer patterns and strong laws/property-based testing—he brings an engineer’s rigor to reliability and observability. Based in the UK, he pairs deep language and tooling fluency with a track record of starting platforms from an empty cloud account to global production.
11 years of coding experience
18 years of employment as a software developer
BSc (Hons) Computing Informatics, BSc (Hons) Computing Informatics at University of Plymouth
Stackoverflow
13reputation
1kreached
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1question
Github Skills (71)
dotty9
scala-native8
aws8
scala8
ruby7
appender7
linux7
derived7
csharp7
kinesis-stream7
homebrew7
windows6
dotnet6
compiler6
azure6
Programming languages (9)
Github contributions (5)
barriem/movrel
Nov 2017 - Mar 2025
Contributions:6 pushes, 5 branches in 7 years 4 months
barriem/spam
Jul 2014 - Jul 2015
Contributions:12 commits, 5 pushes in 11 months
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