Calvin Metcalf - Application Magician

Calvin Metcalf

Application Magician

Weymouth, Massachusetts, United States

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Summary

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Rockstar

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Top School

Calvin Metcalf is a pragmatic full-stack engineer with 12 years of experience building resilient back-end systems and developer tooling from Weymouth, MA. As "Application Magician" at Applied Geographics he blends geospatial domain work with deep contributions to high-profile open-source projects like Node.js, Knex, and PouchDB, improving crypto, stream behavior, and query semantics. He’s equally comfortable shipping CI/CD and release automation (proj4js publish improvements) as he is optimizing low-level cryptography and performance (rust-crypto SIMD, crypto-browserify AES/GCM). Trained in biological psychology, Calvin brings a multidisciplinary curiosity to engineering problems and a knack for pragmatic, well-tested solutions. Outside of work he maintains an active open-source presence while living with several cats, a dog, and his wife.

12 years of coding experience

Bachelor of Science - BS, Biological Psychology, Bachelor of Science - BS, Biological Psychology at Tufts University

University College London

Stackoverflow

Stats

784reputation

41kreached

22answers

1question

Github Skills (69)

expressjs10

testing10

databases10

ember-cli10

knx10

numerical-optimization10

browserify10

optimization10

crypto10

code-optimization10

javascript10

stream10

pouchdb10

sql10

optimisation10

Programming languages (16)

C#C++CSSRustCGoHTMLXSLT

Github contributions (5)

proj4js/proj4js

Nov 2013 - Apr 2019

JavaScript library to transform coordinates from one coordinate system to another, including datum transformations

Role in this project:

DevOps Engineer

Contributions:5 releases, 152 commits, 57 PRs in 5 years 6 months

Contributions summary:Calvin's contributions primarily involved the modification of the `publish.sh` script. They updated the script to include steps for building the project, adding build artifacts, and pushing to the remote repository using the correct parameters. They also addressed issues with the script's logic related to versioning and publishing to npm and jam. These changes streamlined the project's release process.

javascript-librarygeospatialtransformwgs84utm

browserify/crypto-browserify

Oct 2014 - Aug 2018

partial implementation of node's `crypto` for the browser

Role in this project:

Back-end Developer & Test Automation Engineer

Contributions:115 commits, 57 PRs, 92 pushes in 3 years 10 months

Contributions summary:Calvin primarily contributed to implementing and testing cryptographic functions for the browser. Their work involved adding and testing AES ciphers, including GCM modes. They also added stream support for hashing and HMAC, further expanding the library's capabilities. Additionally, the user integrated and tested Diffie-Hellman key exchange and ECDH functionality.

cryptographypartialbrowserwebcryptojavascript

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