Avi Hoffman Email and Phone Number

I developed the AWS-hosted backend and storage infrastructure for Placemeter, a computer vision company processing video data to measure and classify traffic, including:1) A Cassandra cluster for fast storage of large amounts of real-time traffic data.2) A MySQL-backed Django backend serving a tiered user-facing portal for access to and payment for traffic data; the portal also supports ordering and managing dedicated sensor hardware.3) A Spark cluster for large data analyses and repairs.I also developed and documented a public API to access Placemeter data.

I led development of the Android app One Today, a mobile charitable giving application. It’s been downloaded over 50,000 times and has a 4.5 rating on the Google Play Store.This included implementing a heuristic algorithm for determining charities a user may be interested in based on previous donations and other signals; I also worked with a small team on an App Engine backend hosting an API that accepted donations to nonprofits, allowed users to match donations of other users, supported full text search of nonprofits, and accepted payments.I previously worked on Google Checkout.There, I redesigned and implemented an entirely new user interface for Google Checkout, wrote much of the logic for ensuring that Google Checkout complies with international sanctions, and developed an entirely new internal authentication system that additionally allowed users to make purchases without creating an account.