• WorkCo-founder at Cityblock Health

    Cityblock is a novel healthcare provider and technology company, based out of Brooklyn NY. Started in the fall of 2017, Cityblock has quickly grown to 600+ employees serving tens of thousands of members across the Northeast. Our focus is on medically complex and socially underserved Medicaid populations, and our doctors and nurses deliver a home-based intensive primary care model with integrated behavioral health, substance abuse counseling, and social benefits coordination (think: housing support, legal support).

    It's a fascinating and operationally complex business, and we have been building out an in-house Engineering team from day one, with early teammates hailing from Google, Facebook, Artsy, Uber, Knewton, Compass, Oscar, and Squarespace.

    Cityblock is backed by $300M in venture capital and is growing quickly. You can learn more about our open careers here. 👈

  • PreviouslyProduct & Incubation at Sidewalk Labs

    Venture Investing at Thrive Capital

    Product Management at Google (NYC, Bangalore) and YouTube (Zurich).

  • EducationComputer Science at Yale
  • Twitter@baygross
  • LinkedInlinkedin.com/in/baygross
  • Codegithub.com/baygross [R, SQL, Ruby/Rails, Python, Javascript, Sketch]
  • ReadingGoodreads, Stratechery, Oversharing, SSC, OlearyKM, Kevin Kwok, Out Of Pocket
  • Contactbaygross@gmail.com
  • InterestsHealthcare Innovation, Data Viz & Generative Art, Urbanization, Productivity Tooling, and Digital Privacy/Security.

Generative Art & Image Analyses


Few weekends exploring browser-based canvas art, image modulations, etc.

tools: javascript, P5.js

PRISM: Your text message history, visualized.

Website Summer 2013

PRISM grew out of a final college project, which aimed to implement and expand on the "StackedGraph" algorithm described by Byron and Wattenberg in their 2008 publication on the topic.

Now, PRISM is a stand-alone OSX app, available in the Apple App Store. It creates dynamic, customizable visualizations of your texting history based off of the data in your iOS backups. Users can sort, color, blend, and mix their texting history in a variety of ways to create aesthetically pleasing, and often surprising, personalized infographics.

Update 2015: No longer in the app store; apple is not a fan of scraping itunes db backups :(

tools: MacRuby, Javascript

EssayTyper: It types your essays for you!

Website April 2012

EssayTyper.com uses a shadowy algorithm known as Wikipedia to write any essay in the world for you, in mere seconds.

Just enter your topic of choice and start slapping that keyboard - EssayTyper will do the rest!

#1 on Reddit during launch, the site saw over 1 million unique visitors in its first twenty-four hours, and as of 2016 still maintains 500k-1M hits each month.

tools: Sinatra, Javascript

Bitcoin Remote Controller

Fall 2017

In the summer/fall '17 bitcoin craze, we built a physical remote for real-time trading. Load up a dashboard of the latest spreads, and let 'er rip. Collaboration with @matbalez

tools: AWS Lambda, Amazon Dash buttons, Python, GDAX Api


Slackbot w/ Airplay Speakers

Fall 2017

A slackbot that can connect to your local Airplay/Airport LAN speakers and speak out your messages for you. Possibilities abound.

tools: Ruby


HackYale: Student-driven lectures in web dev and entrepreneurship.

Website 2012-2013

We launched HackYale in the Fall of 2011, with a single student-run course covering web application development and front-end design. Inspired by Harvards well-known and well-regarded CS50 lecture, HackYale was motivated by the lack of relevant/modern development training available to students through the Yale CS Department at the time. That first semester we received 500 formal applications, and a grew a community mailing list of over 1k from the Yale undergraduate and graduate communities.

The following semester we expanded our team and curriculum to include five weekly courses covering front-end design, Rails, Node.JS, and iOS development.

HackYale helped formalize the need for a modern "tech" lecture within the liberal arts curriculum at Yale, and continues to exist today with paid student lectures through a partnership with Yale CEID.

role: Co-founder. Community, PR, development, content.

collaboration with @gaybrick and @milesgrimshaw

WhatsHerFace-book: Do you know your friend graph?

Code Dec 2011

After years of networking, the average college student knows fewer than 75% of their friends on Facebook. Individuals that have access to their photos, activities, location, and more.

WhatsHerFace-book.com was a browser-based game quiz where you were challenged to name several of your Facebook friends in succession while racing the clock. We'd show you 4-5 photos of the individual, with their face highlighted... you just had to give us their name! (We built in phonetics and hamming buffer to make it reasonable.)

The game intended to help Facebook users reconsider their privacy exposure online. After aggregating the results of ten thousand games from ~five thousand players, we were left with some sobering statistics.

Update 2015: FB tried to shut us down! Special thanks to the EFF!

collaboration with @charliecroom as part of Yale Law & Tech
and, we are published!

tools: Rails, jQuery, Facebook OpenGraph, AWS

HardlyWork.in: Hides your Facebook feed in a spreadsheet!

July 2011

HardlyWork.in pulled data from the Facebook Graph and Twitter API allowing you to surreptitiously browse your feeds, view friends' profiles, and even preview photos and comments. The site drew 600k unique visits across well over one hundred countries in its first two weeks.

Update 2015 Unfortunately, due to changes in the Facebook API the site is a shadow of its former self, and cannot be rebuilt.

tools: Rails, Facebook OpenGraph, jQuery, AWS


Sep 2011

After nearly missing Yale Dining's flagship entrée one afternoon in 2011, I vowed it would neigh happen again.

Now tender-fans across campus are never caught off-guard, and every Chicken-Tenders-Thursday 700+ students wake up to a text proclaiming the good news.

tools: Twilio, Rails, Nokogiri

Browser: The dating website exclusively for IE users.

Feb 2014

Browser is a singles community exclusively for users of Internet Explorer. Traditional values, and traditional markup standards.

No more unsolicited lightbox modals. Just you, a few GIFS, and a fun-loving group of single luddites.

Update 2015 Sadly, browserdating.com is now defunct. Long live tinder.

Photobama: The selfies app you deserve.

Aug 2014

Photobama is the selfie app you've been waiting for. Simply snap a photo, and then drop Obama or your celebrity de jour into the background. Currently only offered for iOS.

collaboration with @milesgrimshaw, and @tbfaux.

Undergraduate Coursework in Statistics & Networks


Many interesting projects in Yale Stats 230 and Sociology 137 -- can recommend both courses fully.

- an analysis of AirBNB unit prices in Manhattan relative to distance from subway (TLDR: less impactful than you would think)

- an analysis of undergraduate social structures (proxied by living-group) relative to family income (proxied by Zillow assessed value of home property). (TLDR: more impactful than you would hope)

tools: R, SQL, Ruby, Python, Pajek

collab with @kevinakwok

SubletMeYale: Yale's best source for off campus housing.

March 2011

One of my first projects and a finalist for Yale's first AppChallenge back in 2011. SubletMeYale facilitated easy sublet sharing between students living on and off of the main New Haven campus. (Launched long prior to AB&B, when only alt was craigslist).

Each summer the site hosts more than 500 apartments!

Update 2015: unfortunately Rails 2.3 security isn't what it used to be, and my first ever web app wasn't exactly DRY or modular. Anticipating a healthcare.gov esque effort to repair, I think its time to retire the site. SubletMeYale is dead -- long live AirBnB.

Amicus: Social fundraising for civic organizations

Summer 2011

Amicus was a VC-backed startup based out of New York City that leveraged social connections (FB graph, etc) to help non-profits expand and engage with their constituency.

I helped build the v1 product and raise seed funding, working across the stack as part of a two man development team. Departed team fully in early 2012.

role: member of founding team: development, design, product.
tools: Rails, SQL, jQuery, AWS, Twilio, FB Graph

TurnTaylor.fm: Listen to Taylor together.

June 2013

TurnTaylor.fm is the future of online social music listening. Similar to internet-rival TurnTable.fm, but optimized for #taylortuesdays.

Update 2015: We had a good run, but .fm domain names are like $100/yr, and so I think this site is going to come down now. Thanks Micronesia.

role: Co-founder, CEO, Swiftie

tools: Ruby, Sinatra, and a cavalier disregard of copyright law

ChomaLab: Video analysis for tadpole cardiac systems.

Spring 2011

I spent a few months in the Spring of 2011 working with the research lab of Dr. Michael Choma at Yale Medical School. Our project entailed taking high-definition color photography of beating tadpole hearts, and then analyzing the video to extract heart boundaries and estimate the volume change over time.

role: visual data analysis

tools: Matlab