Software engineer focused on payments, checkout, and merchant platforms. I began my career as a behavior therapist, and that background still shapes how I think about people, friction, and product design. I like building systems that make complex experiences feel simple.

2022 — NowBlockSoftware Engineer

2022 — Now

San Francisco Bay Area

Worked across merchant onboarding, checkout, and payments infrastructure at Block, across Afterpay and Cash App.

Built and expanded Merchant Hub, including self service signup and onboarding experiences across multiple regions

Contributed to checkout and platform systems across merchant onboarding, bank account verification, eligibility, and risk related flows

Shipped internal tools and platform improvements that made merchant and payment experiences more scalable, reliable, and easier to operate

2019 — 2022Afterpay TouchSoftware Engineer

2019 — 2022

San Francisco Bay Area

Worked across consumer growth, checkout integrations, merchant platforms, and payments systems at Afterpay.

Co created and later owned the Afterpay Button, a lightweight JavaScript checkout integration, and expanded it across regions with support for Express Checkout, Cash App Pay, and Customer On File payments

Built the Online Card experience across admin and merchant portals, including settlements, exports, configuration, invoices, interchange fee management, and Clearpay support

Contributed to the Cash App Pay launch by integrating PayKit into AfterpayJS and enabling Cash App Pay across checkout, merchant, and admin experiences

Shipped merchant platform and tooling improvements across onboarding, order expiry, refund windows, configuration flows, and internal operational tools

Built consumer growth and analytics integrations including marketing pixels, referral landing pages, Amplitude instrumentation, and compliant rollout patterns

2018 — 20195miles LLCSoftware Engineer

2018 — 2019

Beijing City, China

Introduced new features/improvements for both the www.5miles.com Webapp and its Progressive Web App (PWA) platforms built with Angular and Sails.js: listings, reviews + ratings, product categorization & tagging, search auto completion, and many more

2018 — 2019CyberMilesSoftware Engineer

2018 — 2019

Beijing City, China

Designed and created the CyberMiles Explorer Webapp with Vue & Vuex + Egg.js, fetched and dissected blocks & transactions from our Mainnet (www.cmttracking.io) & TestNet (testnet.cmttracking.io) through Web3-cmt.js, and displayed every aspect of our CyberMiles DPOS model to CMT stakeholders

Enforced SEO for www.cybermiles.io in September, resulting in reduction of site load speed by over 2 seconds, and increases in users (+67%), organic traffic (+94%), and click through rate (+20%) before the MainNet launched in October

Migrated cybermiles.io from WordPress to a JAMstack architecture with Gatsby.js (React + GraphQL), Contentful (Headless CMS) and Netlify (Host) to increase speed, security and scalability

2017 — 2019Freelance Web DevelopmentFull Stack Developer

2017 — 2019

San Francisco Bay Area

Leveraged the speed and flexibility of Hugo to generate multiple fully customized websites (www.litylang.org & www.noomiwallet.com) for clients with tight deadlines

Built full stack applications using:

JavaScript (ES6), React, Redux, Angular, Node.js, Express, MongoDB, HTML5/CSS3, Sass, Golang, MySQL, JQuery, D3.js, PostgreSQL, Webpack, Grunt, Git, Firebase, Mocha/Chai, Heroku, Digital Ocean, AWS

Please refer to the Projects section below for details or visit www.daryll.io for demo

Education

University of California, Berkeley

Bachelor of Arts (B.A.)

Hack Reactor

Advanced Software Engineering Immersive Program

Shatin College (High School)

International Baccalaureate Diploma Programme

Singapore International School (Hong Kong)

Experience+

Education

Bachelor of Arts (B.A.)

Advanced Software Engineering Immersive Program

International Baccalaureate Diploma Programme