Calvin is available for hire
Hire CalvinCalvin Koepke
Verified Expert in Engineering
Software Developer
Location
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.
Portfolio
SundaeSwap Labs, Inc
React, TypeScript, Tailwind CSS
Kora Labs
Cardano, TypeScript, Gatsby, Node.js, Tailwind CSS
Finder
WordPress, React, TypeScript, Next.js
Experience
Availability
Part-time
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—adahandle.com—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
Finder
- 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
Freeshifter
- 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
Experience
Startups for the Rest of Us
https://www.startupsfortherestofus.comI designed and built a custom theme on WordPress for a popular podcast with over 450 episodes.
Genesis Starter Theme
https://github.com/cjkoepke/genesis-starter-themeI composed this powerful, developer boilerplate for WordPress theme builders who use the Genesis Framework.
Genesis Responsive Menus
https://github.com/copyblogger/responsive-menusI created this plug-n-play jQuery plugin for adding accessible, responsive menus to any Genesis child theme.
Genesis Simple FAQ
https://github.com/copyblogger/genesis-simple-faqI developed an accessible, performant WordPress plugin that adds FAQ management and rendering to your Genesis child theme.
Skills
Languages
CSS, PHP 7, PHP, CSS3, TypeScript, JavaScript, HTML
Frameworks
Genesis Framework, Tailwind CSS, Jest, Next.js, Laravel
Libraries/APIs
React, Node.js
Tools
Gulp, Adobe Photoshop, Webpack, GitHub, NPM, PhpStorm, Sketch
Platforms
WordPress, Visual Studio Code (VS Code), Cardano
Other
WordPress Plugins, WordPress Themes, Gatsby, Atomic Design, Styled-components
Paradigms
Functional Programming, Object-oriented Programming (OOP)
Storage
MySQL, MongoDB
Collaboration That Works
How to Work with Toptal
Toptal matches you directly with global industry experts from our network in hours—not weeks or months.
1
Share your needs
Discuss your requirements and refine your scope in a call with a Toptal domain expert.
2
Choose your talent
Get a short list of expertly matched talent within 24 hours to review, interview, and choose from.
3
Start your risk-free talent trial
Work with your chosen talent on a trial basis for up to two weeks. Pay only if you decide to hire them.
Top talent is in high demand.
Start hiring