# Daniel Choi > Senior Software Engineer at Microsoft | Building and Scaling Mission‑Critical Build Infrastructure for Azure & Windows Location: Kirkland, Washington, United States Profile: https://flows.cv/danielchoi I'm a senior software engineer with 7.5 years building large-scale infrastructure, security platforms, and developer tooling at Microsoft in Seattle. I specialize in build systems, cloud infrastructure, supply chain security, and technical leadership. At Microsoft, I work on OneBranch—the unified build platform used by >50K developers across Azure, Windows, Xbox, and Office. I've led teams delivering critical infrastructure for disaster recovery systems, security compliance for government contracts, and supply chain security initiatives that protect Microsoft's software ecosystem. My work combines deep technical execution with cross-organizational leadership—collaborating with Azure Compute, Windows, and security teams to solve complex problems at the intersection of compliance, reliability, and developer experience. I've driven system reliability improvements from 50% to >99%, eliminated critical security vulnerabilities, and built platforms that reduce build times and accelerate audits at scale. ## Work Experience ### Senior Software Engineer @ Microsoft Jan 2024 – Present | Redmond, Washington, United States • Built and evolved core infrastructure for Microsoft's unified build and release platform used by 50K+ developers across Azure, Windows, Xbox, and Office to run 250K+ builds per day. • Led developer teams to develop Azure's disaster recovery system end-to-end, enabling rebuilds of critical services after catastrophic outages and protecting business continuity for Azure customers. • Drove critical Windows security compliance work required to maintain eligibility for U.S. government contracts, protecting $10B+ in revenue. Led cross-organization teams to deliver end-to-end enforcement features. • Built centralized ownership and compliance platforms across 2K+ Windows packages, translating ambiguous requirements into streamlined audits and mitigated risk. • Mentored 10 junior and intern engineers, guiding technical career development and resulting in successful internal promotions and return offers. • Conducted 50+ technical and behavioral interviews for SDE roles, contributing to the organization’s growth. ### Software Engineer II @ Microsoft Jan 2020 – Jan 2024 | Redmond, Washington, United States • Led cross-functional teams of 3-4 engineers to drive team’s service reliability from 50% to >99% by creating its first telemetry framework, reducing time-to-detect for impacting issues. • Modernized legacy build infrastructure serving 20K+ developers, reducing build times by up to 2 hours per pipeline and eliminating weeks of maintenance overhead annually through cloud-native migrations and comprehensive automation. • Improved the supply chain security of Windows by implementing software provenance tracking, reducing dependency vulnerabilities and streamlining compliance audits. ### Software Engineer @ Microsoft Jan 2018 – Jan 2020 | Redmond, Washington, United States • Developed automated maintenance for build agent pools, improving build consistency, security, and reliability and saving 40+ hours / week of manual effort for the team. ### Software Developer Co-op @ Hootsuite Jan 2017 – Jan 2017 | Vancouver, British Columbia, Canada • Developed high-traffic React features with 50,000+ daily clicks and scaled Scala microservices supporting 1,000,000s of users via LinkedIn and Facebook APIs. ### Software Developer Intern @ Visier Inc. Jan 2016 – Jan 2016 | Vancouver, British Columbia, Canada • Engineered new data visualization features for a business analytics platform using TypeScript, Angular 2, and Scala. ## Education ### Bachelor’s Degree in Computer Science The University of British Columbia Jan 2015 – Jan 2018 ## Contact & Social - LinkedIn: https://linkedin.com/in/danielychoi --- Source: https://flows.cv/danielchoi JSON Resume: https://flows.cv/danielchoi/resume.json Last updated: 2026-03-22