Timothy Callahan
Software Engineer at DoorDash
New York, New York, United States
Summary
👤
Senior🎓
Top SchoolTimothy Callahan is a pragmatic software engineer with 10 years of experience building backend and full-stack systems across startups and fintech and health-care platforms, currently contributing at DoorDash after senior engineering work at Bloomberg. He favors Ruby and JavaScript and brings an entrepreneurial mindset and appetite for unfamiliar challenges to product-driven teams. His background spans fast-paced consumer services (Rent the Runway), health tech (Oscar Health), and data-heavy enterprise environments, giving him fluency in shipping reliable services at scale. Unusually for an engineer, he also studies Mandarin Chinese, reflecting curiosity that extends beyond code and often informs cross-cultural collaboration.
10 years of coding experience
9 years of employment as a software developer
Bachelor of Arts (B.A.) English / Philosophy, Bachelor of Arts (B.A.) English / Philosophy at Loyola University MarylandMaster of Science (MS) Global Finance, Master of Science (MS) Global Finance at Fordham Gabelli School of Business
English, Chinese
Github Skills (3)
slack-bot7
authority7
slack4
Programming languages (1)
Github contributions (5)
timbo815/algorithms-practice
Jul 2017 - Dec 2017
Contributions:8 PRs, 27 pushes, 3 branches in 5 months
rubyreviewalgorithms-and-data-structuresbasic-data-structuresdata-structures
timbo815/timbo815.github.io
Jun 2016 - Aug 2017
Contributions:25 pushes, 1 branch in 1 year 1 month
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