John Brennan
Senior Software Engineer at Ooma, Inc.
Denver, Colorado, United States
Summary
👤
Senior🎓
Top SchoolJohn Brennan is a Senior Software Engineer based in Denver with 8 years of experience building and operating large-scale VoIP systems and cloud-native services. He has a track record of turning technical debt into measurable savings—refactoring call fraud and call recording systems to cut costs by 75% and ~30% respectively—while keeping 99.99% uptime for 100k+ devices. Comfortable collaborating with C-suite stakeholders and cross-functional teams, he builds API integrations, deployment pipelines, and Datadog-driven monitoring to increase organizational velocity and resilience. His background in GIS and environmental science informs a pragmatic, data-focused approach to system design and automation. Colleagues know him as the engineer who, when faced with a tricky problem, says “I think I could build that…” and actually does.
9 years of coding experience
8 years of employment as a software developer
BS, Environmental Science, BS, Environmental Science at Creighton University
Stackoverflow
1reputation
846reached
0answers
1question
Github Skills (40)
portal8
chatroom8
backend7
django7
socket6
swift6
react6
webpack-loader6
datetimepicker6
combine6
ios6
http-signature6
xctest6
testing6
nodejs5
Programming languages (6)
Github contributions (5)
jbrennan414/findmyfourteener
Jan 2019 - Dec 2022
🗻Do you live in Denver and need to hike a 14'er? This is the site for you!
Contributions:32 commits, 23 PRs, 93 pushes in 3 years 11 months
reacthikeneeddenver
jbrennan414/ski-scraper
Dec 2020 - Jan 2022
Contributions:1 review, 14 PRs, 132 pushes in 1 year
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