KJ Mitchell

Software Engineer & Web Developer

Fitness Coach • Dad • Christian

I build fast, accessible web experiences — most recently open-source payment tools at the Interledger Foundation, and before that nearly six years of measurement SDKs at Nielsen. Based in Tampa, FL.

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Experience

Click any role to read the full story.

  1. Interledger Foundation

    Remote

    Software Engineer · May 2025 – Jul 2026

    • Shipped 64 merged PRs to the open-source Publisher Tools during a full redesign of the tool website
    • Delivered accessibility fixes across the site — focus styling, semantic labels, ARIA descriptions, responsive tables
    • Integrated Open Payments subject grants for wallet ownership verification
    TypeScriptReactReact RouterTailwind CSSViteFigmaOpen Payments APICloudflare

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  2. Nielsen

    Oldsmar, FL

    Senior Software Engineer · Jun 2022 – Oct 2024

    Software Engineer · Apr 2019 – Jun 2022

    • Refactored the legacy Browser SDK to modern JavaScript (ES6+) without disrupting crediting for existing client integrations
    • Expanded SDK support to Smart TV and DOM-less environments — Tizen, WebOS, and React Native
    • Managed AWS infrastructure with Terraform and streamlined the GitLab CI/CD release pipeline
    JavaScriptTypeScriptAWSTerraformNode.jsDockerGitLab CI/CDReact Native

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  3. The Walt Disney Company

    Seattle, WA

    Web Developer Intern · May 2018 – Aug 2018

    • Built a React and Redux web application for internal employees and clients
    • Streamlined data management workflows, cutting information lookup time by 70%
    ReactReduxJavaScript

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Projects

The Canvas Nail Studio — Booking Platform

In development

A full-stack booking platform replacing a third-party scheduler: guest booking, Square card-on-file payments, magic-link auth for staff and clients, and an admin dashboard covering services, add-ons, staff hours, per-service buffers, promotions, and appointment history.

Next.js 16React 19TypeScriptTailwind CSS v4PostgresDrizzle ORMSquareVercel

Skills & Education

Languages

JavaScript (ES6+)TypeScriptHTML5CSS3

Frameworks & UI

ReactTailwind CSSNode.jsReact NativeReact RouterViteRedux

Testing & Accessibility

React Testing LibraryWCAG/ARIASemantic HTMLKeyboard & screen reader supportCross-browser compatibility

Tooling & Cloud

FigmaGitGitHub ActionsGitLab CI/CDDockerAWSTerraform

BS in Information Technology — University of Central Florida

2013 – 2018 · Theta Tau Professional Engineering Fraternity: President, Marshal, Webmaster

Group Fitness Instructor — F45 Training

2022 – 2024 · Led classes of 15–30 members, building an atmosphere that boosted attendance, morale, and retention

Recent Writing

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