William Kelley
Software Engineer at Hex
New York, New York, United States
Summary
👤
Senior🎓
Top SchoolWilliam Kelley is a software engineer based in New York with nine years of experience building full-stack web applications and a strong mathematics background that informs his graphics programming interest. He has shipped performance-focused features and infrastructure improvements—such as a 400% page load improvement, a 72% CI speedup, and design system work that boosted developer productivity by 30%—across roles at Prenda and its successors. Comfortable as both an individual contributor and a team leader, he has led solo engineering efforts, run engineering book clubs, produced post-mortems to improve operational resilience, and owned API and payment integrations. An active open-source contributor, he has enhanced React+Meteor packages with authentication hooks and tests, demonstrating attention to DX and reliability. Pragmatic and people-oriented, he combines technical depth in TypeScript, Node, React, and databases with a track record of measurable product and developer experience gains.
9 years of coding experience
6 years of employment as a software developer
Bachelor of Arts - BA, Mathematics and Computer Science, Bachelor of Arts - BA, Mathematics and Computer Science at New York UniversityInternational Baccalaureate Diploma, International Baccalaureate Diploma at Desert Mountain High School
Spanish
Stackoverflow
1reputation
0reached
0answers
0questions
Github Skills (6)
typescript10
typescripts10
meteor10
react10
typescript-types10
javascript9
Programming languages (3)
Github contributions (5)
meteor/react-packages
Dec 2021 - Dec 2021
Meteor packages for a great React developer experience
Role in this project:
Full-stack Developer
Full-stack DeveloperContributions:2 reviews, 25 commits, 3 PRs in 11 days
Contributions summary:William primarily contributed to the development of React components within a Meteor.js environment, focusing on user accounts and related functionalities. Their work involved implementing React hooks, such as `useUserId` and `useUser`, and HOCs for user authentication. They also added unit tests using the Tinytest testing framework and addressed type-related issues while making minor improvements to package descriptions.
reactmeteorreact-developergreatdeveloper-experience
prenda-school/design-system
Mar 2021 - Jan 2023
Implementations of the Prenda Design System (PDS).
Contributions:40 releases, 139 reviews, 559 commits in 1 year 10 months
implementationsprenda-design-systemprenda-designprendadesign-system
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