Calvin Koepke, Developer in Boise, ID, United States
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Calvin Koepke

Verified Expert  in Engineering

Software Developer

Boise, ID, United States
Toptal Member Since
October 6, 2017

Calvin is a full-stack engineer with over a decade of experience in front-end and back-end development. He specializes in React and Tailwind CSS but has a strong understanding of underlying languages such as TypeScript, Node.js, CSS, SCSS, PHP, and Go. Calvin has led small teams of engineers and worked independently on projects as a solo developer.


SundaeSwap Labs, Inc
React, TypeScript, Tailwind CSS
Kora Labs
Cardano, TypeScript, Gatsby, Node.js, Tailwind CSS
WordPress, React, TypeScript, Next.js




Preferred Environment

TypeScript, React, Tailwind CSS, Jest, Visual Studio Code (VS Code), Webpack, JavaScript

The most amazing...

...project I've led was a complete front-end overhaul using React and Tailwind CSS for a large-scale decentralized exchange on the Cardano blockchain.

Work Experience

Lead Front-end Engineer

2022 - PRESENT
SundaeSwap Labs, Inc
  • Led a small team to develop a library of reusable components to scale multiple product verticals within the company's suite.
  • Built an open-source TypeScript SDK that allows anyone to build compliant transactions for the decentralized exchange (DEX) that are then settled on the Cardano blockchain.
  • Integrated multiple internally-maintained npm libraries into both of our product applications and their adjoining test suites based in Jest.
Technologies: React, TypeScript, Tailwind CSS

Founder and Chairman of the Board

2021 - PRESENT
Kora Labs
  • Started a Cardano NFT protocol that acts as a naming standard for users' wallets. Each unique name is resolved, managed, and owned as an NFT that the user purchases.
  • Marketed and designed the ADA Handle——website.
  • Operated as the company's chairman of the board, which was formed to manage the decentralized protocol, ADA Handle. Organized team and board meetings and ensured proper accountability for executives.
Technologies: Cardano, TypeScript, Gatsby, Node.js, Tailwind CSS

Senior Front-end Engineer

2020 - 2022
  • Developed a complex WordPress website with hundreds of thousands of content posts, including a highly customized Gutenberg plugin that allowed publishers to interact directly with external in-house APIs.
  • Built the beta version of a native Apple and Android app through the React Native framework that ingested content from the WordPress site and integrated an internal ledger for tracking crypto storage.
  • Helped build sophisticated testing scaffolding for the many Gutenberg blocks within the large-scale WordPress application.
Technologies: WordPress, React, TypeScript, Next.js

Owner | Developer

2018 - 2022
  • Built a performant and responsive website for Blank on Blank, converting a high-profile design into a functional and flexible website.
  • Developed open-source themes for the WordPress community and ran a front-end engineering community.
  • Created highly performant WordPress websites, including hosting and configuration via DevOps.
Technologies: CSS, HTML, React, WordPress

WordPress/React Developer

2019 - 2019
Athletics (via Toptal)
  • Built and integrated a multisite infrastructure and ACF setup.
  • Developed a GatsbyJS front end using styled components, animations, and components.
Technologies: Gatsby, WordPress

Senior Web Engineer

2017 - 2019
Zeek Interactive
  • Created high-scale WordPress websites.
  • Contributed to company open-source projects.
  • Built performant front-end code.
  • Led the development of enterprise-level projects.
Technologies: React, CSS, HTML, WordPress, PHP

Front-end Engineer

2015 - 2017
Rainmaker Digital
  • Improved an internal codebase through coding a configurable, drop-in solution—saving our internal development team 50 hours a year in repetitive tasks.
  • Identified, suggested, and implemented new technologies and tools into our workflow that resulted in 300% increased efficiency and maintainability.
Technologies: CSS, HTML, WordPress, PHP

Product Designer | Developer

2014 - 2015
The Audience Awards
  • Redesigned, developed, and documented a new company brand across the site.
  • Designed and detailed an internal style guide, utilizing Atomic Design principles, doubling the production rate of backend developer tasks and implementations toward deployment.
Technologies: HTML, CSS, PHP, Laravel

Startups for the Rest of Us
I designed and built a custom theme on WordPress for a popular podcast with over 450 episodes.

Genesis Starter Theme
I composed this powerful, developer boilerplate for WordPress theme builders who use the Genesis Framework.

Genesis Responsive Menus
I created this plug-n-play jQuery plugin for adding accessible, responsive menus to any Genesis child theme.

Genesis Simple FAQ
I developed an accessible, performant WordPress plugin that adds FAQ management and rendering to your Genesis child theme.


React, Node.js


Gulp, Adobe Photoshop, Webpack, GitHub, NPM, PhpStorm, Sketch


Genesis Framework, Tailwind CSS, Jest, Next.js, Laravel


CSS, PHP 7, PHP, CSS3, TypeScript, JavaScript, HTML


WordPress, Visual Studio Code (VS Code), Cardano


MySQL, MongoDB


Functional Programming, Object-oriented Programming (OOP)


WordPress Plugins, WordPress Themes, Gatsby, Atomic Design, Styled-components

Collaboration That Works

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