Alexander Farrill
Founder & Lead Developer at Deferred
Los Angeles, California, United States
Summary
🤩
Rockstar🎓
Top SchoolAlexander Farrill is a founder and hands-on lead developer with 15 years building consumer and infrastructure products, currently running Deferred after founding Open Listings (YC W15) and sofn.xyz. He blends full-stack engineering with product leadership, having led buyer experience engineering at Opendoor and shipped real-time bidding and analytics systems at RUN. His work spans front-end UX improvements (notably integrating MJML error handling into React previews) to scalable backend services and data-driven features. Alexander has a pattern of turning complex domains like home buying and ad tech into simple, usable products and hiring teams to scale them. Based in Los Angeles, he pairs a math background from Columbia with practical startup experience and a habit of shipping incremental, testable improvements. He’s actively hiring and still contributes code across the stack, often focusing on bridging service integrations with polished UI.
15 years of coding experience
18 years of employment as a software developer
Y CombinatorHopkins SchoolBA Mathematics and American Studies, BA Mathematics and American Studies at Columbia UniversityBachelor's degree (Started) Electrical and Computer Engineering, Bachelor's degree (Started) Electrical and Computer Engineering at Carnegie Mellon University
Spanish, German
Stackoverflow
140reputation
17kreached
1answer
1question
Github Skills (14)
javascript10
mjml10
nextjs10
front-end-development10
react10
typescript-types9
typescript9
typescripts9
css8
lucene6
stemming6
porter-stemmer6
solr6
microdata6
Programming languages (6)
Github contributions (5)
sofn-xyz/mailing
Jun 2022 - Dec 2022
Build, test, send emails with React
Role in this project:
Full-stack Developer
Full-stack DeveloperContributions:178 reviews, 585 commits, 166 PRs in 5 months
Contributions summary:Alexander was heavily involved in the development of email features within a React application. They refactored previews to pass error messages from MJML to the frontend and integrated these messages into the user interface. They also implemented new UI components (MjmlErrors and changes to PreviewSender) and a new page structure. The user demonstrated a solid understanding of integrating and managing different services.
reactemailemails
openlistings/capistrano-mongo-sync
Mar 2016 - Jan 2018
Contributions:21 commits, 1 PR, 6 pushes in 1 year 10 months
local-developmentsyncmongodatabasemongoose
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