David Sosby
Principal Engineer at DocuSign
Issaquah, Washington, United States
Summary
👤
Senior🎓
Top SchoolDavid Sosby is a Principal Engineer with 14+ years of experience building high-impact collaboration and consumer-facing software, currently driving engineering efforts at DocuSign. He helped launch early releases of Microsoft Teams and has led frontend modernization efforts at Outreach, transitioning products to strict TypeScript, React, and GraphQL while optimizing client performance and telemetry pipelines. His background spans low-level mobile and OS work at BlackBerry—where he delivered patented features and WebKit fixes—to scalable cloud and backend services at Microsoft, giving him a rare full-stack fluency. A self-taught coder who competed in programming contests and graduated with honors in Computer Science, he blends hands-on engineering, mentorship, and product-minded architecture to ship reliable experiences used by millions.
15 years of coding experience
18 years of employment as a software developer
BS, Computer Science, BS, Computer Science at The University of Texas at Dallas
Github Skills (20)
preact9
react8
deno-module8
react-component8
react-components7
javascript7
deno7
typescript7
fluentui6
office-ui-fabric6
cdn6
web-components6
web-development5
microsoft4
chicken-scheme4
Programming languages (7)
Github contributions (5)
dsosby/ramdump
Apr 2015 - Jun 2017
Contributions:1 release, 13 pushes, 1 branch in 2 years 3 months
dsosby/WeightCalc
Aug 2011 - Feb 2012
Contributions:19 commits in 6 months
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