William Fendler

Frontend Engineer
Saint Paul, MN


Frontend Engineer passionate about collaborating with design and product teams to build great experiences on the web.

Work Experience


Frontend/UX Engineer

May 2022 - Current
  • Developed, deployed, and A/B tested features for a new Bing.com product using React.js, managing the complexities of a large monorepo with over 3,000 engineers.
  • Worked closely with the design team to enhance the brand identity across multiple products through strategic UI interactions and animations.
  • Enhanced existing Storybook design systems and built a new one from scratch, significantly improving design consistency and usability.
  • Drove the development of high-traffic top-of-funnel pages, attracting nearly 5 million monthly views, and led A/B/n testing to inform strategic product decisions in a large Next.js/Tailwind app.
  • Triaged and helped resolve over 300 accessibility issues following the acquisition of a startup, bringing the product into Microsoft’s a11y compliance.

Zeus Jones

Senior Creative Technologist

Mar 2016 - May 2022
  • Led the development of the agency’s technical team from the ground up, shaping our strategy and technical services.
  • Led several initiatives supporting the agency’s marketing and technical infrastructure and enhanced processes related to communication, recruiting, finances, and knowledge management.
  • Led the development efforts for high-profile clients including Nike, Apple, Code42, and Nestle including CMS-driven projects, full i18n support, and strict a11y standards.
  • Managed and made significant contribution to all internal technical efforts, overseeing design, user experience, and development of custom software handling many mission-critical tasks for the agency.



Jan 2014 - Feb 2016

Spent a few years consulting, taking on roles including product manager, UX designer, design systems consultant, and solo software engineer at three early-stage startups.

Early Career

Frontend Engineer

Jan 2010 - Jan 2014

Led frontend development for large-scale CMS/e-commerce websites at Space150 and The Nerdery, working with major brands such as American Express, 3M, Buffalo Wild Wings, and American Eagle.


  • TypeScript
  • React
  • Tailwind
  • Svelte
  • Figma
  • Storybook
  • Accessibility
  • Internationalization