Michael Jewell is a Principal Software Engineer with 12 years of hands-on experience building full‑stack React and TypeScript applications and leading teams to deliver high‑impact products quickly. He has driven front-end architecture and developer experience at scale—owning roadmaps, migrating large codebases to TypeScript, and cutting time‑to‑interactivity from minutes to under a second for top-tier customers. At AppFolio he shipped mission‑critical financial tooling that manages billions in assets, led rapid product launches (bringing Alpha to production three months early), and applied ML techniques including LLMs and neural nets to optimize data extraction. A pragmatic refactorer and builder, he has modernized open-source full‑stack projects by converting server code to ES6, updating build pipelines, and introducing linting and structure improvements. Based in Denver, he combines deep technical craft with people leadership, coaching mid‑to‑senior engineers to build scalable, maintainable systems that developers enjoy using.
12 years of coding experience
10 years of employment as a software developer
Highgate School
Master’s Degree, Computer Science, Master’s Degree, Computer Science at University of California, Santa Barbara
Master of Engineering (MEng), Computer Science with Study Abroad, 1st, Master of Engineering (MEng), Computer Science with Study Abroad, 1st at University of Bristol
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Role in this project:
Full-stack Developer
Contributions:19 commits, 5 PRs, 33 comments in 9 days
Contributions summary:Michael primarily focused on refactoring and modernizing the codebase. They updated build processes to use Babel for ES6 support and streamlined the server setup. The user also restructured the project by moving database-related code and configurations. Additionally, they converted the server-side code to ES6 standards and integrated linting for improved code quality.
Contributions:34 commits, 4 PRs, 24 pushes in 11 months
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Michael Jewell - Principal Software Engineer at Ontra