Seán Olszewski
Staff Software Engineer at Tools for Humanity
United States
Summary
🤩
Rockstar🎓
Top SchoolSeán Olszewski is a Staff Software Engineer with over a decade of hands-on experience building and leading complex products across startups, defense, Fortune 10s, and developer tools. A self-taught engineer and former music student, he combines rigorous software quality expertise with sensitivity to human factors, product design, and business needs—an approach honed while collaborating with and leading engineers from MIT, Stanford, and Harvard. He’s contributed to influential open-source work, notably modernizing XCTest to support Swift’s async testing lifecycles, and has driven delivery at companies including Apple and Tools for Humanity. Known for bringing discipline and craft to messy domains, he excels at shaping technical direction and building reliable systems across diverse industries.
11 years of coding experience
12 years of employment as a software developer
Electronic Production and Design, Electronic Production and Design at Berklee College of MusicHigh School Diploma, High School Diploma at East Brunswick High SchoolComputer Science, Computer Science at Harvard Extension School
English
Github Skills (7)
asynchronous10
swift10
async10
xctest10
concurrency10
test-automation10
macos9
Programming languages (8)
Github contributions (5)
swiftlang/swift-corelibs-xctest
Sep 2021 - Nov 2021
The XCTest Project, A Swift core library for providing unit test support
Role in this project:
Back-end Developer & Test Automation Engineer
Back-end Developer & Test Automation EngineerContributions:16 reviews, 19 commits, 6 PRs in 1 month
Contributions summary:Seán primarily focused on enhancing the XCTest library, introducing asynchronous setup and teardown methods to support modern Swift concurrency features. They modified core files like `XCTestCase.swift` and `XCAbstractTest.swift` to enable async test lifecycles. Additionally, the user updated the test suite and test implementations to utilize the new asynchronous capabilities, ensuring proper functionality and error handling in asynchronous testing scenarios. Their work demonstrates a focus on adapting the testing framework for modern Swift language features.
core-libraryswiftunit-testxctest
SeanROlszewski/PasswordStrength
Feb 2017 - Nov 2017
Contributions:7 commits, 4 pushes, 1 branch in 9 months
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