Matt Holt
Open Source Developer at Self-employed
United States
Summary
🤩
Rockstar
Top expert inComprehensive Open-Source Technology EcosystemGo Development and Distributed Systems Engineering
Matt Holt is an experienced open-source software developer with 14 years building reliable Go-based tooling and servers, best known as the author of the Caddy web server and CertMagic. As a self-employed maintainer he blends backend systems work (TLS, proxying, L4 load balancing, and ACME integration) with pragmatic full‑stack utilities like curl-to-go and json-to-go that improve developer workflows. His contributions span performance-minded refactors, cross-platform build tooling (xcaddy), and robust integrations with external APIs (Google Photos, Twitter), showing comfort with both infrastructure and service integration. Matt’s work often surfaces in widely used projects—Caddy and related libraries—and he has a knack for improving ergonomics and error handling in security-sensitive code. An MS in Computer Science underpins a practical, developer-first approach: shipping small, well-tested tools that scale into essential components of the web ecosystem.
14 years of coding experience
Stackoverflow
23,111reputation
4.0mreached
205answers
38questions
html-parsing
top-5%
parsing
top-1%
go
top-1%
json
top-1%
jquery
top-5%
sql-server
top-5%
Github Skills (84)
deco10
csv-parse10
testing10
command-line-interface10
http10
proxy10
refactor10
caddy10
security10
mtls10
backup10
build-automation10
csv-parsing10
compression10
refactoring10
Programming languages (32)
Github contributions (5)
caddyserver/caddy
Jan 2015 - Jan 2023
Fast and extensible multi-platform HTTP/1-2-3 web server with automatic HTTPS
Role in this project:
Back-end Developer
Back-end DeveloperContributions:79 releases, 1622 reviews, 2285 commits in 8 years 1 month
Contributions summary:Matt primarily focused on improving and enhancing the Caddy command-line interface (CLI) by implementing new features such as a validation flag and expanding its options. These improvements included the addition of new commands like file-server and reverse-proxy, enhancing the functionality and usability of the Caddy server. The contributions involved modifying core command-line logic and functionalities, demonstrating expertise in back-end development for a server platform.
webservergoweb-servercaddyfilehttp-server
mholt/archiver
Apr 2016 - Nov 2022
DEPRECATED. Please use mholt/archives instead.
Role in this project:Back-end Developer
Back-end DeveloperContributions:20 releases, 68 reviews, 121 commits in 6 years 8 months
Contributions summary:Matt focused on improving the `archiver` package's error messages by making them more concise and readable. They refactored the code related to zip and tar archives, ensuring that already compressed files are not re-compressed. They added functions for unzipping and untarring files, extending the functionality of the archiving tool.
extractionzstandardstreamsxzdata-storage
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