John Callaway
Principal Engineer Solutions Architect at Consulting & Enterprise Architecture
Louisville, Kentucky, United States
Summary
👤
Senior🎓
Top SchoolJohn Callaway is a Principal Engineer and Solutions Architect with 25+ years of experience designing secure, cloud-native systems and leading modernization at enterprise scale. He specializes in Azure architecture, identity governance (SSO/SAML/OIDC), and building reusable .NET microservice patterns that have accelerated delivery and reduced duplication across large organizations. John has driven measurable impact—saving $150K/month in Azure spend, enabling $40M+ in annual revenue through auction platform work, and standardizing engineering practices that improved reliability and audit readiness. A six-time Microsoft MVP, published author, podcast host, and meetup co-founder, he blends hands-on architecture with mentoring and community leadership. He’s particularly adept at translating complex identity and federation requirements into standardized patterns and templates teams can adopt consistently.
10 years of coding experience
21 years of employment as a software developer
Computer Science, Computer Science at Spalding University
Stackoverflow
721reputation
53kreached
17answers
4questions
Github Skills (150)
serverless10
k8s10
faas10
golang10
lambda10
functions-as-a-service10
aws-lambda10
tdd10
serverless-framework10
nodejs10
docker10
openfaas10
serverless-functions10
razor9
spreadsheet9
Programming languages (9)
Github contributions (5)
ovation22/TripleDerby.Api
Aug 2020 - Nov 2021
Api for TripleDerby.com, the online horse racing game!
Contributions:70 commits, 124 PRs, 74 pushes in 1 year 4 months
apihorseracingweb-appgeneric-repository
ovation22/PragmaticTDD
May 2016 - Sep 2017
Contributions:20 commits, 19 pushes, 1 branch in 1 year 3 months
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