William Callahan
Software Engineer at 908 Devices
Bethel, Connecticut, United States
Summary
👤
Senior🎓
Top SchoolWilliam Callahan is a cloud software engineer with nine years of hands-on experience designing and delivering high-performance, multi-cloud architectures and cost-optimized distributed systems. He has led engineering teams across public, health, and media sectors to produce mission-critical solutions—optimizing APIs to sub-200ms latency at 10M daily requests and cutting batch times by 90%—while reducing cloud OpEx and CI/CD costs. His background spans AWS serverless and streaming technologies (Lambda, MSK, Kinesis), container platforms, and resilient data stores, and he has applied that expertise to election forecasting, global UN disarmament tracking, and university systems. A former Army National Guard squad leader, he brings disciplined leadership, cross-cultural collaboration experience, and an operational mindset to engineering challenges. Based in Bethel, CT, he currently builds cloud products at 908 Devices and consistently balances security, scalability, and cost-efficiency in production systems.
9 years of coding experience
10 years of employment as a software developer
Bachelor of Science - BS Major: Computer Science Minor: Security, Bachelor of Science - BS Major: Computer Science Minor: Security at Western Connecticut State University
English
Stackoverflow
640reputation
48kreached
46answers
5questions
Github Skills (30)
phone-number-input9
html6
php6
css6
sublime6
css-shapes6
javascript6
sublime-text6
authlib5
aws-services5
aws-lambda4
django4
aws-ecs4
aws4
flutter4
Programming languages (7)
Github contributions (5)
tecconn/colorblind-pal
Sep 2017 - Jan 2025
Contributions:1 release, 13 pushes, 2 branches in 7 years 6 months
WillCallahan/crux-docker
Jan 2020 - Feb 2021
Contributions:43 commits, 37 pushes, 2 branches in 1 year
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