Marcos Casagrande
Founder & CTO at Freelance (Self employed)
Escaldes-Engordany, Andorra
Summary
🤩
RockstarMarcos Casagrande is a founder and CTO with a decade of hands-on experience building back-end systems, developer tools, and blockchain integrations using Deno and Node.js. A self-taught engineer who began programming at 19, he has strong open-source credentials as a core contributor to the high-profile Deno runtime and its standard library, improving compatibilities, performance, and WHATWG-compliant URL behavior. He’s also contributed full-stack and CLI features to blockchain tooling like stacks.js, demonstrating practical cross-domain expertise in identity and transaction tooling. As founder of Denode and a freelance consultant, Marcos blends product-focused architecture with low-level runtime improvements, shipping features and tests that matter in production. Based in Andorra, he brings a rare combination of runtime internals knowledge and developer-facing tooling experience that accelerates teams adopting modern JavaScript/TypeScript runtimes.
10 years of coding experience
10 years of employment as a software developer
English, Spanish
Stackoverflow
39,312reputation
2.9mreached
775answers
9questions
error-handling
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async-await
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Github Skills (59)
asynchronous10
socket-io10
deno10
filesystem10
javascript10
runtimes10
async10
es6-promise10
testing10
jes10
command-line-interface10
typescript10
run-time10
url-parsing10
file-operations10
Programming languages (9)
Github contributions (5)
denoland/std
Apr 2020 - Oct 2020
The Deno Standard Library
Role in this project:
Back-end Developer
Back-end DeveloperContributions:80 commits in 5 months
Contributions summary:Marcos primarily contributed to the Deno standard library, specifically focusing on implementing and improving compatibility with Node.js modules. Their work included adding the `util.promisify` function, improving the `fs.close` implementation, and enhancing `fs.writeFile` functionality to support URLs. They also addressed issues related to logging, as well as improvements to the archive/tar module, and buffer implementation.
deno-deploydeno-modulejavascriptstandard-librarydeno
denoland/deno
Apr 2020 - Jan 2023
A modern runtime for JavaScript and TypeScript.
Role in this project:Back-end Developer & Core Contributor
Back-end Developer & Core ContributorContributions:61 reviews, 122 commits, 142 PRs in 2 years 8 months
Contributions summary:Marcos primarily focused on improving the Deno runtime by adding features, fixing bugs, and optimizing performance. Their contributions involved implementing buffer size arguments for the `copy` function and `copyN` function, aligning these functions with Go's implementation. They also improved the HTTP version parsing in `std/http/io.ts`. The user also made multiple contributions related to the `URL` implementation, ensuring it adhered to WHATWG specifications.
rustjavascriptruntimedenotypescript
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