Alex Leendertsen
Software Development Engineer II (SDE II) at Amazon
Austin, Texas, United States
Summary
👤
Senior🎓
Top SchoolAlex Leendertsen is a Senior Full Stack Engineer with nearly a decade of hands-on experience designing and owning backend-first systems and customer-facing web apps across property tech, legal tech, and enterprise platforms. He specializes in reliable REST APIs, scalable distributed services, and performance-driven backend pipelines (Java, Kotlin, Python, .NET) while regularly shipping React-based front ends when owning features end-to-end. Alex has a track record of replacing costly third-party dependencies with in-house solutions to reduce risk and operating expense, parallelizing ingestion pipelines to cut processing time by ~90%, and navigating PII- and compliance-sensitive environments at scale. Comfortable both leading architecture and doing the implementation work, he pairs operational rigor (CI/CD, monitoring) with pragmatic UX improvements that remove manual file-based workflows. Based in Austin, he blends system-level optimization with product-minded execution—and his GitHub bio says it succinctly: he converts caffeine into code.
9 years of coding experience
9 years of employment as a software developer
Bachelor's of Science, Computer Science, Bachelor's of Science, Computer Science at Washington State University
Stackoverflow
125reputation
53kreached
7answers
4questions
Github Skills (44)
log4net10
editing10
javascript9
dotnet9
typescript9
nodejs9
angular9
wpf9
react8
sdk7
web-performance7
web-framework7
logging6
d3js6
asp-net6
Programming languages (2)
Github contributions (5)
alexleen/scrape-x
Jul 2018 - Jan 2019
Simple .NET library that provides generic web scraping abilities using XPaths.
Contributions:3 releases, 37 commits, 4 PRs in 6 months
net-librarydotnetxpathsgenericscraping
alexleen/log4net-config-editor
Apr 2018 - Feb 2021
A WPF GUI for editing log4net configuration files.
Contributions:6 releases, 99 commits, 108 PRs in 2 years 10 months
dotnetguiconfiguration-fileswpfediting
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