Haydn Vestal, Developer in Austin, TX, United States
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Haydn Vestal

Verified Expert  in Engineering

Software Engineer and Developer

Location
Austin, TX, United States
Toptal Member Since
April 7, 2015

Haydn has a wide variety of experience across companies from a two-person startup to Goldman Sachs and Google. His area of greatest consulting expertise is small- to mid-stage startups, but he also has experience with automated trading and Android development.

JavaMySQLPythonRapid PrototypingRustCTOLinuxAgile Software DevelopmentMicroservicesPHPGoogle APIAndroidFacebook APIC++MongoDB

Portfolio

TinyChain
Rust, Python 3, System Architecture, API Databases, APIs, Concurrency...
Google
Google Cloud Spanner, Python, C++, Java
Goldman Sachs
MongoDB, Apache Tomcat, Java

Experience

Linux - 15 yearsSoftware Architecture - 10 yearsJava - 7 yearsMicroservices - 5 yearsPython - 5 yearsRapid Prototyping - 4 yearsRust - 3 yearsLean Startups - 2 years

Availability

Part-time

Preferred Environment

Git, Python, Java, Rust, IntelliJ, Linux, CLion

The most amazing...

...product that I've worked on is Google Jamboard, the first hardware product from GSuite.

Work Experience

Founder

2020 - PRESENT
TinyChain
  • Developed a cloud service runtime featuring automatic cross-service transactions, automatic concurrency, and automatic GPU acceleration.
  • Created a Python client that cross-compiled Python application code to TinyChain's native JSON representation.
  • Built a self-sustaining business by offering custom software design and development services.
Technologies: Rust, Python 3, System Architecture, API Databases, APIs, Concurrency, GPU Computing, Microservices, Machine Learning, Neural Networks, CTO

Software Engineer

2015 - 2020
Google
  • Developed a low-energy Bluetooth (BLE) communication protocol for Google Jamboard and Android and iOS Jamboard apps.
  • Designed and implemented customer identity authorization for Google Jamboard.
  • Developed the tools needed to keep Google's fleet of videoconferencing devices up and running on a day-to-day basis.
Technologies: Google Cloud Spanner, Python, C++, Java

Associate

2013 - 2015
Goldman Sachs
  • Worked on Orbit Suite, Goldman's set of productivity apps: wsj.com/articles/goldman-sachs-to-spin-out-mobile-phone-software-projects-into-separate-venture-1445981960.
  • Developed the web version of Orbit Drive, Goldman's internal file-sharing app.
  • Developed the Android version of Orbit Drive, Goldman's internal file-sharing app.
Technologies: MongoDB, Apache Tomcat, Java

Software Engineer

2012 - 2013
SNAP Interactive
  • Supported one of the most popular dating apps on Facebook.
  • Maintained and improved a high-traffic (around 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 that is unlikely to generate a response.
  • Went from almost 0% to almost 100% unit test coverage.
Technologies: Linux, Apache, Memcached, MongoDB, MySQL, PHP

Software Engineer

2011 - 2012
Hotlist
  • 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: Linux, Solr, MongoDB, MySQL, Python

TopTal.java

A single-file sample for a company that operates an ad exchange—given an HTTP endpoint with a parameter advertiser_id and an unpredictable response time which returns data in the form:

[
{
advertiser_id: "1234",
ymd: "2014-09-24",
num_clicks: 5,
num_impressions: 1090
},
{
advertiser_id: "1234",
ymd: "2014-09-25",
num_clicks: 19,
num_impressions: 1089
}
]

aggregate as much data as possible in 200ms and notify the caller of the unavailable advertiser_ids. It can be tested by calling the aggregate method with various lists of longs and examining the result. Still, it does require an HTTP endpoint fitting the description mentioned above.

Autotrader

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

The program works by scraping public news sources to identify news related to publicly-traded companies, then analyzing changes in the sentiment of the news related to a given company in order to predict how its stock price will change in the near future.

Languages

Rust, Python, Java, PHP, C++, HTML, JavaScript, Erlang, Python 3

Paradigms

Rapid Prototyping, Agile Software Development, Microservices, Functional Programming, DevOps, Data Science

Storage

MySQL, Xapian, Google Cloud Spanner, Memcached, MongoDB, API Databases

Other

Prototyping, Software Architecture, System Architecture, CTO, Lean Startups, OpenSCAD, APIs, Concurrency, GPU Computing, Machine Learning, Neural Networks, Data Structures, Algorithms, Chemistry, IT Support, Performance

Platforms

Linux, Oracle, Eclipse, Amazon EC2, Android, Amazon Web Services (AWS)

Libraries/APIs

Google API, Facebook API

Tools

Apache Tomcat, Apache, NGINX, Git, EAGLE, Ansible, Solr, IntelliJ, CLion

2007 - 2008

Coursework Toward a Degree in Computer Science

University of Texas - Austin, Texas, USA

2005 - 2006

Coursework Toward a Degree in Chemistry

New York University - New York, NY, USA