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Elliott Management

You & Mr Jones

Coffin Capital & Ventures

Emerson Collective

SharesPost

Sinai Ventures

Wellington Management

Andreessen Horowitz

FirstMark

Bessemer Venture Partners

SV Angel

Fidelity Investments

Goldman Sachs Investment Partners

First Round Capital

Rakuten Capital

Millennium Technology Value Partners

Industry Ventures

Rizvi Traverse

TrueBridge

Columbia Partners

Hercules Capital

ACE and Company

New York Angels

Crescent Enterprises

Dot Edu Ventures

Acadian Asset

Miroma Ventures

Designer Fund

Kaplan Group Investments

Nucleus Adventure Capital

Sand Hill Venture Capital

Scott Belsky

Stockwell Capital

The Start Project

Social Starts

Darwin Ventures

Slow Ventures

Founders Circle Capital

SWaN & Legend Venture Partners

Blisce

Mosaic Ventures

HDS Capital

Innovation Department

Armat Group

Acequia Capital

RhumbLine

Studio VC

New York Venture Partners

GSV Financial Group

Sound Ventures

Zeno Ventures

All Blue Capital

University Growth Fund

U First Capital

DNB Asset Management

Linfluence Tech

Migration Capital

A.Capital Ventures

Peregrine Ventures

Concept to Co

InvestX

SciFi

nyus

Section Partners

Kleiner Perkins

G Squared

EQUIAM

Founders Future

GC1 Holding

StraightPath Venture Partners

Star Tech NG

Reform Ventures

Legendary Ventures

Odenn Ventures

Harmony Venture Partners

Flying Cow Ventures

All Access Venture Partners

Light Street Investements

dog poop ventures

La Maison Partners

Corton Capital

Global Financial Investor

K2 Global

Social image bookmarking platform provider. Users called Pinners can create various boards on their interests and bookmark photos, articles, products, recipes, life hacks, etc. Users can also follow the boards of others who they find interesting. It also allows users to buy the products tagged in the Pins. The app is available for both iOS and Android users. It monetizes through in-app ads.

Social image bookmarking platform provider

Shopping:
- Building a high quality shopping catalog by ingesting merchant feeds and by crawling e-commerce domains.
- Related products when viewing fashion and home decor pins.
- Product recommendations in homefeed & search. 

Ads:
- Factorization machines and deep neural networks for click prediction models.
- Platform for distributed training for click prediction models.
- Platform for computing and serving near-realtime ad-level engagement count features aggregated by user and query attributes.
- Targeting, auction and payment support for international ads. Opened the platform to English speaking markets: UK, Canada, Ireland, Australia and New Zealand.
- First generation customer list targeting functionality.
- First generation payment fraud prevention mechanisms.
- Automated Pinterest's payment systems as the platform grew to process $X00M in yearly revenue.

Added lightweight ranking to Quora's homefeed to save 500ms loading time with no loss in engagement by scoring fewer candidates with the main engagement prediction model.

Collaborative Fund

Y Combinator

Tiger Global Management

Benchmark

Matrix Partners

North Bridge

Peter Thiel

Josh Hannah

Jonathan Heiliger

Pharmavite

Vertex Ventures

Craft Ventures

Bling Capital

Yellowdog

369 Growth Partners

Social Q&A community platform. It allows users to ask questions and get answers from community members. Users can ask questions related to any topic, answer questions, follow questions and create blogs on Quora. All questions are tagged with categories. It has mobile apps for iOS and Android.

Implemented the system for aggregating offline and realtime user features for Twitter's ads server.

Endeavor

Elon Musk

ARK Investment Management

Silver Lake

DFJ Growth

Firsthand Technology Value Fund

DST Global

Lowercase Capital

T. Rowe Price

Man Capital

Insight Partners

Spark Capital

Morgan Stanley

Union Square Ventures

Andree Yeo

Dick Costolo

Ron Conway

Naval Ravikant

Bill Tai

Timothy Cook Draper

Carl Icahn

J P Morgan

SoftTech VC

XG Ventures

GSV Capital

Floodgate Fund

Baseline Ventures

Bezos Expeditions

TeleSoft Partners

Boston Financial and Equity Corporation

Greenlight Capital

Eniac Ventures

Group Guru

Lexus Capital

Stern Fisher

World Innovation Lab

Westway Capital

Digital Economy Ventures

Goodwater Capital

Dragon Global

Binary

Hard Yaka

Kortschak Investments

LocalGlobe

Sozo Ventures

Founders Equity Partners

Inception Capital Management

Ravensbridge Capital

Avant Global

DG Ventures

Bond Capital

TCG Ventures

S.A.W. Capital Partners

Ventura Capital

UCLA Ventures

True Global Ventures 4 Plus

M3B Capital

Pegasus Tech Ventures

Mayhaw Capital

27th Street Capital

Berkeley SkyDeck

Aeon

Outlander Labs

Samudra Pacific Capital Partners

Alpha Wave Global

Social platform for microblogging. It allows users to post real-time status updates. It also enables users to share photos, videos, and web links. The mobile application is available for Android and iOS devices.

Built the first version of timeline for facebook pages (businesses, public figures, etc.) for mobile.

Quilvest

Goldman Sachs

Elevation Partners

Shumway Capital

TriplePoint Capital

Microsoft

Greylock

Meritech

Accel

Kevin Efrusy

Ali Partovi

General Atlantic

Index Ventures

Founders Fund

Glynn Capital

Data Collective

Horizons Ventures

Lakestar

Saints Capital

EchoVC Partners

2020 Ventures

Econa

Hamilton Ventures Merchant Banking

Juvo Capital

Breyer Capital

Third Point

Edventure Holdings

Klifer Capital

Princeton Ventures

Social platform for connecting with friends and family. Users can create personal profiles, create groups & pages, add friends, exchange messages, post status updates and photos, share videos, and receive notifications when others update their profiles. Users can join common-interest user groups organized by workplace, school or college, or other characteristics, and categorize their friends into lists. Also features social games where users can get engage with their friends.

Social platform for connecting with friends and family

Applied Scientist at Pinterest Labs

Paul Baltescu