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Haydn Vestal, Lean Startups Developer in New York, NY, United States
Haydn Vestal

Lean Startups Developer in New York, NY, United States

Member since March 4, 2015
Haydn has a wide variety of experience across companies from a two-person startup to the investment bank Goldman Sachs, with 30,000 employees globally. His area of greatest consulting expertise is small- to mid-stage startups, but he also has experience with automated trading and Android development.
Haydn is now available for hire



  • Linux, 7 years
  • MySQL, 5 years
  • Agile Software Development, 5 years
  • Rapid Prototyping, 4 years
  • PHP, 4 years
  • Lean Startups, 2 years
  • Java, 2 years
  • Python, 2 years
New York, NY, United States



Preferred Environment

Java/Python/Erlang, Eclipse, Git

The most amazing...

...thing I've made is a 3D-printable wind turbine.


  • Associate

    2013 - 2015
    Goldman Sachs
    • Developed and maintained the application host for a popular mobile application.
    • Developed an Android application.
    Technologies: Java, Tomcat, MongoDB
  • Software Engineer

    2012 - 2013
    SNAP Interactive
    • Supported one of the most popular dating apps on Facebook.
    • Maintained and improved a high-traffic (~70 million users) service running on Linux/Apache/PHP/MySQL.
    • Spearheaded a major project to re-architect a search index/matching algorithm.
    • Created a machine-learning tool able to inform a user if they try to send a message which is unlikely to generate a response.
    • Went from almost 0% to almost 100% unit test coverage.
    Technologies: PHP, MySQL, MongoDB, Memcache, Apache, Linux
  • Software Engineer

    2011 - 2012
    • Maintained and expanded Hotlist, a geo-social event aggregation startup.
    • Wrote a data ingester in Python to match data from Facebook Events, Google Maps, Foursquare, Citygrid, and more.
    • Participated in the re-architecture of the database deployment.
    • Wrote a machine-learning tool to match address data in different formats.
    • Wrote a machine-learning tool to identify duplicate venue and event records.
    Technologies: Python, MySQL, MongoDB, Solr, Linux
  • Senior Engineer

    2009 - 2011
    • Hired as a Junior Web Developer, promoted to lead developer within a year.
    • Managed a team of five developers on one of the world's top 100 websites by traffic.
    • Re-architected Cron-based application services to event-driven asynchronous processing.
    • Scaled the application to support nearly 2x traffic growth.
    • Coordinated with a global team to manage technical updates to the site across nineteen countries and five languages.
    Technologies: HTML/JavaScript, PHP, MySQL, Memcache, Xapian, Nginx
  • Web Developer

    2008 - 2009
    Protect America, Inc.
    • Maintained a public-facing eCommerce website for a large home-security merchant.
    • Developed an internal application to support the sales department.
    • Developed an internal application to support the network marketing program.
    • Implemented a variety of site features and updates.
    • Participated in planning future architecture and features.
    Technologies: HTML/JavaScript, PHP, MySQL, Apache, Linux
  • Student Web Developer

    2007 - 2008
    University of Texas
    • Maintained the official website of UT's Division of Housing and Food Services.
    • Implemented a new website to support DHFS's diversity efforts.
    • Developed tools to drastically improve site security.
    • Provided technical support to DHFS users.
    • Participated in assessing new technologies and solutions.
    Technologies: PHP, Oracle, Apache, Linux


  • Autotrader (Development)

    An automated stock-trading program developed to use machine learning and sentiment analysis to generate trading signals.

  • 3D-printable Wind Turbine (Other amazing things)

    Not really a software project, but still, now you can download a wind turbine!


  • Languages

    Python, PHP, Java, JavaScript, Erlang
  • Paradigms

    Rapid Prototyping, Agile Software Development, Functional Programming, DevOps
  • Storage

    MySQL, Memcached, MongoDB
  • Other

    Prototype, Software Architecture, System Architecture, Lean Startups, OpenSCAD
  • Platforms

    Linux, AWS EC2, Android, Amazon Web Services (AWS)
  • Libraries/APIs

    jQuery, Google API, Facebook API
  • Tools

    EAGLE, Ansible, Solr


  • Coursework towards a degree in Computer Science
    2007 - 2008
    University of Texas - Austin
  • Coursework towards a degree in Chemistry
    2005 - 2006
    New York University - New York, NY
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