Harrison Liddiard

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Work Experience

Technical Product Manager 3 2022 – present


  • Launched initiatives that lifted NNAs, revenue, and margin. Increased revenue by many-millions per year.
  • Working across domains to design experiments that A/B test improved user guidance in merchant onboarding & activation.

Software Engineer 1–3 2017 – 2022


  • Led experiment implementations on Node.js + React stack that improved onboarding completion rate and product adoption among sellers.
  • Won internal and external hackathons for PayPal, recruited, helped plan PayPal’s annual developer conference.
  • Developed software that helped 100s of employees meet each other during Covid WFH.

Software Engineering Intern 2016

The New York Times

  • Increased CMS search speed 10x with Elasticsearch.
  • Search frontend: reduced complexity, redesigned results display, implemented as-you-type feedback for queries.
  • Wrote binary search typographic headline balancer that runs on all article pages.

Web Developer & Designer 2014 – 2017

UCLA Athletics

  • Worked among several departments to prioritize, design, and create webpages for UCLAʼs largest athletic events.
  • Authored web style guide, worked with website provider to coordinate full site redesign.
  • Developed internal apps with Node.js and Django to automate common tasks.

Managing Editor: Digital 2014 – 2015

Daily Bruin

  • Taught and advised 80+ people in web development, videography, and podcasting at UCLA’s student news organization.
  • Coordinated interdepartmental breaking news coverage and collaboration on feature stories.


UCLA 2017

Computer Science and Linguistics, B.A.

Technical Skills

Experienced (5+ years)

JavaScript, React, Node.js, HTML & CSS, Python, Django, API design

Familiar (1–5 years)

TypeScript, Next.js, SQL, UX design


  • Stream Editor: run Unix text manipulation commands interactively on the web
  • Weather/transit board: colorful, informative LED fridge magnet using HTML Canvas
  • Slack Meetups: pair people in a channel for 1:1s and generate visual reports
  • google-sheet-s3: instantly create an API from a spreadsheet
  • shorten links with easy-to-remember URLs

Other Skills & Achievements

  • FAA-licensed private aircraft pilot & commercial drone operator
  • PADI-certified scuba diver
  • Black belt in Kenpo
  • Eagle Scout
  • Yamaha Music School graduate
  • Technical communicator
  • Photo, audio & video editor
More work experience at
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Content © 2024 Harrison Liddiard. All rights reserved. Product names, logos, and brands are property of their respective owners. Background image credits.