Jon Hoffman

Jon Hoffman

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Co-Founder and CTO
New York, United States

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Résumé


Jobs verified_user 0% verified
  • Anomaly
    Co-Founder and CTO
    Anomaly
    Jan 2020 - Current (6 years 6 months)
    Anomaly harnesses advancements in Machine Learning and Artificial Intelligence to uncover hidden patterns and costly, preventable defects in health payment data - driving certainty in reimbursement & healthier relationships between payers, providers and patients. We’re hiring! Visit findanomaly.com for more info.
  • Redesign Health
    Head Of Engineering
    Redesign Health
    Aug 2018 - Apr 2020 (1 year 9 months)
    Building healthcare companies from scratch: ideation, funding, pushing code and hiring the founding teams. Was early acting CTO for: - Vault - Calibrate - EverBody - HealthQuarters - Anomaly
  • Foursquare
    SVP, Engineering
    Foursquare
    May 2016 - Dec 2017 (1 year 8 months)
    I reported to the CEO and ran the engineering team across our NYC and SF offices.
  • Foursquare
    Senior Director of Engineering - Ads
    Foursquare
    Mar 2015 - May 2016 (1 year 3 months)
    I led the team that's responsible for building all of Foursquare's advertising products: * Pinpoint - We build targetable advertising segments (e.g., "people who've gone to a car dealership in the past 14 days") based on Foursquare first-party location data and secondary data. Raw lat-lng data is fed through machine learned models to determine place visit history with a high degree of confidence. Segments are built using offline batch processing as well as inline with an aggregated real-time bid stream. * Attribution - Real world conversion measurement based on a panel of Foursquare & Swarm users. Exposed user visit rate is compared to an algorithmically constructed control group to compute visit rate lift. The control group constructi
  • Foursquare
    Director of Engineering - Foursquare App
    Foursquare
    May 2014 - Mar 2015 (11 months)
    The team was responsible for Foursquare app components including profile, follow graph, expertise, and sign-up/onboarding flow during the period that Foursquare and Swarm were split into two different apps. After building the sign-up/onboarding flow, we also built the ability to use Foursquare "anonymously" - i.e., without signing up.
  • Foursquare
    Senior Staff Engineer
    Foursquare
    Mar 2014 - May 2014 (3 months)
    A brief stint as an individual contributor to help build the server side of what evolved into the Top Picks screen in the Foursquare app
  • Foursquare
    Director of Engineering - Infrastructure
    Foursquare
    Mar 2011 - Mar 2014 (3 years 1 month)
    Led the infrastructure team during the company's highest growth period. The team's notable projects included: - Designing the MongoDB collections that store Foursquare's largest data sets - Tooling, including a fork of MongoDB to support running Mongo on unreliable disks - Building out the offline analytics stack that now powers much of the Foursquare, Swarm, Ads, and Enterprise products - Splitting up our monolithic server stack into a services-oriented architecture and building out the support tooling
  • Foursquare
    Software Engineer
    Foursquare
    Mar 2010 - Mar 2011 (1 year 1 month)
    As one of the first engineers, I mostly focused on issues related to scalability as the user base grew from thousands to millions.
  • U
    Software Engineer
    Udorse
    Jul 2009 - Feb 2010 (8 months)
    Built udorse.com and wee bit of topguest.com. I spent most of my time working on the server side web architecture using the scala web framework, Lift.
  • Goldman Sachs
    Software Engineer
    Goldman Sachs
    Jun 2005 - Apr 2009 (3 years 11 months)
    I worked on the Risk Cache, a custom reporting tool for assessing market and credit risk across the entire firm's positions. Trade and simulated pricing data from various sources were co-located into Java process heap to allow for arbitrary queries by end users over a web interface. Data requirements that exceeded limitations of commodity hardware required a move from single process to distribution across multiple servers. I created the data chunking, loading, and recovery framework for pricing data. - Built an arbitrary operation distributed execution framework to send computes to data and aggregate results (i.e., map/reduce). - Built a parallel calculation graph engine to optimize data loading utilizing the Fork-Join task library
  • COMMERZBANK AG
    Software Engineer
    COMMERZBANK AG
    Jul 2004 - May 2005 (11 months)
    I was a software developer within the Digital Markets group. We created plumbing to other services such as Reuters and Bloomberg. These were gateways written in Java to allow our proprietary trading platform to communicate via quirky TCP socket protocols.
  • Centurylink
    Software Engineer
    Centurylink
    Aug 2003 - Jun 2004 (11 months)
    - Worked on R&D Voice over IP (VoIP) conferencing project as part of training. We created a Java based web service and application code to facilitate call processing on VoIP application server. - Worked on re-creation of the myqwest.com customer portal in order to achieve greater performance, up-time, and usability. - Built the core user account management Web Service in C# that coordinated and synchronized data across an Oracle database and a TIBCO bus exposed legacy service. I also created a data access architecture and supported development efforts of external teams that utilized the framework.
  • Net Health
    Software Developer
    Net Health
    May 2002 - Jul 2003 (1 year 3 months)
    I was a significant contributor on a team that created a Palm Pilot application to allow healthcare staff to input wound treatment assessments electronically while seeing a patient, and then later synchronize that data with a web based system. The Palm Pilot app was written in C, the synchronization conduit was in Visual C++, and the server side was in Microsoft's ASP (pre .NET).
Education verified_user 0% verified
  • Carnegie Mellon University
    BS, Information Systems
    Carnegie Mellon University
    Jan 1998 - Dec 2002 (5 years)
Projects (professional or personal) verified_user 0% verified
  • s
    scalaj http
    Easy to use scala http client library with no other dependencies.
  • S
    Saba Letters
    Letters from my grandparents' family in Europe during WWII
  • T
    Tab Tango
    Side project I created to help split up the tab on a group trip. No sign-up or app download required.
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