About

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Jon Walz

Frontend Engineer
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Hi, I’m Jon! I’m a front end developer and I’ve been obsessing over it since 2016. I currently reside in Amsterdam.

I have worked with many of the common libraries and frameworks, such as React, Next.js, and Remix. I also love to learn about new technologies as they grow within the front end space. I am currently learning Solid.js and tRpc. Fun stuff!

Work Experience

Independent Freelance Developer

2024 to present

Providing specialized web development and frontend engineering services for early-stage companies. Focus on rapid MVP development and modern React/Next.js stack upgrades.

Highlights

  • Led complete stack migration for agricultural testing company, upgrading legacy systems to Next.js with improved performance and developer experience
  • Architected and implemented new ordering experience for health tech startup, focusing on user experience optimization and scalable component design
  • Delivered multiple MVP products from concept to production, specializing in rapid iteration and stakeholder collaboration
  • Tech stack: React, Next.js, TypeScript, Tailwind CSS, modern frontend tooling
  • Hourly consulting model with emphasis on knowledge transfer and sustainable development practices

Gemini (Crypto Exchange)

2019 to 2023

Primary frontend engineer for retail UI. Lead months long initiative to implement redesign of retail exchange experience.

Senior Frontend Engineer

Aug 2019 - Oct 2023 · 4 yr 2 mos

New York, New York

Highlights

  • Lead UI engineer for watchlist feature, convert feature, and new homepage experience
  • Lead UI engineer for new Earn product page and Portfolio page
  • Implemented redesign of retail exchange (4 month effort)
  • Integrated Plaid for credit card processing and Optimizely for feature flags
  • Helped conversion from Flow to TypeScript
  • Introduced Cypress and Framer motion
  • Lead UI engineer for new token additions and Ethereum dynamic fee structure
  • Developed full-stack solutions with TypeScript, React, Scala, Python, and SQL

Olio Apps (Consultancy)

2016 to 2019

Provided software solutions using various languages, predominantly JavaScript. Worked closely with product owners, designers, and stakeholders on setting and meeting deadlines. Researched, adopted, and presented new development practices for emerging technologies.

Highlights

  • Primary frontend engineer for multiple MVP products
  • Built Expo projects including Warcraft logs and an app for injury prevention and compliance
  • Developed React Native applications with focus on healthcare (SSI, security)
  • Worked with tech stack: React, TypeScript, Redux, GO, Python
  • Utilized UI libraries: Material UI, BluePrint