Xun He

Staff Software Engineer specializing in backend systems and security engineering

a security service startupUniversity at Buffalo25 Years ExperienceStaff Level

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About

Senior backend/infrastructure engineer with experience at Microsoft, DocuSign, Pinterest, and Harness, focused on security and developer productivity systems. Stands out for building Pinterest's first vulnerability management platform from scratch for a 100,000-EC2 production environment and driving major performance gains, while also delivering CI/Docker infrastructure and Python test intelligence features shaped by customer demand.

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Key Strengths

built Pinterest's first vulnerability management system from scratch
identified and helped fix about 200 high-risk vulnerabilities in production
scaled security scanning across a 100,000-EC2-instance production fleet
improved scan runtime from about two weeks to under 30 minutes
strong database performance tuning on very large sharded tables
designed and built Docker-based CI infrastructure from scratch
built Python Test Intelligence service from scratch for CI optimization
cross-functional collaboration with PMs, frontend engineers, and customers
customer-driven B2B SaaS feature development and iterative beta delivery
hands-on backend engineering across security and developer infrastructure domains

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Experience

Staff SDEa security service startup · Oct 2023 – Present

Staff SDEHarness · Jun 2022 – Jul 2023

Staff SDECockroach Labs · Feb 2021 – May 2022

Senior SDEPinterest · Nov 2018 – Feb 2021

Senior SDEDocuSign · Oct 2014 – Nov 2018

Senior SDEMicrosoft · Oct 2006 – Oct 2014

Software design engineer/TestMicrosoft · Aug 2003 – Sep 2006

Software engineerNarus · Jan 2001 – Nov 2001

System analystTee-Lok Corporation · Aug 1999 – Jan 2001

Education

University at Buffalomaster, Computer Science

Nanjing Normal Universitybachelor, Computer Science

Awards

Very competitive scores in National College Entrance Exam, including a perfect (100%) score in Math and a 95% score in Physics
Scholarship for graduate study at SUNY at Buffalo
Top 1% of undergraduate study
First-class scholarships for undergraduate study every academic year

Skills

C#Go Python Java Node.js JavaScript TypeScript C++PowerShell MVC JUnit XML HTML CSS JSON

Languages

English

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