Layer 1 copy

We are Sift Science. We do trust.

Unfortunately, evil exists. Fortunately, we're here to stop it! Fraud and abuse plague online businesses of all types, from marketplaces to payment processors, social networks to e-commerce stores. As the internet's trust layer, Sift Science's mission is simple yet powerful: make these online experiences faster, smoother, and safer – using the smartest technology around.

Up, up and away!

Risk scores per day



Domains protected

Learning speed



Events analyzed per day

Launched in 2011 from the Y Combinator incubator program, Sift Science has grown into the leading machine learning fraud detection solution for online businesses. Every day, thousands of websites and apps rely on our cloud-based machine learning to eliminate fraud, slash costs, and grow revenue. And we're just getting started.

Meet the team.

With leaders hailing from from Google, Amazon, Zillow, Twilio, and New Relic, the Sift Science team has decades of experience building teams and technology, scaling startups, and solving the internet's toughest problems.

A software engineer at heart, Jason was an early engineer at a few Seattle startups (Zillow, Optify, BuzzLabs), before migrating to San Francisco to start Sift Science in 2011. He enjoys chess, basketball, and freestyle rapping.

Jason Tan


Fred loves building well-designed, robust, scalable systems. Before Sift, he was a tech lead at Google, Principal Engineer at Jambool, CTO at Teachstreet, product lead at Zillow and engineer at Amazon.

Fred Sadaghiani


Zee loves building customer bases and partnerships for global cloud businesses. Prior to Sift he led sales at Twilio, and business development for EC2 at Amazon Web Services.

Zeeshan Yoonas

Head of Sales

Liz focuses on the most critical asset of an organization - its people. She has startup experience in Technical Recruiting and People Ops and is pursuing her MS from Northwestern in I-O Psychology and Coaching.

Liz Young

Director of People Operations

Bill loves data, analytics, and fighting bad guys. Prior to Sift he led product marketing for New Relic and held product management and marketing roles at VMWare and Oracle.

Bill Hodak

Head of Marketing

A team builder, problem solver, avid traveler and proud mother, Karen held executive roles at Google in Operations, Strategic Partnerships and Finance. A former management consultant, she has an MBA from Yale.

Karen Tsay

Head of Business Operations

Thomas loves building products that solve critical business problems. Typical enterprise software shenanigans are his mortal enemy. Prior to Sift, Thomas worked at Twilio, AdMob and Google.

Thomas Schiavone

Head of Product

The rest of the family...
  • Aaron Beppu
    Tech Lead

    Aaron loves playing with data, but also enjoys travel, seitan, bossa nova guitar, and hugging strangers online. Previously he has worked on search ranking, datamining, analytics infrastructure and distributed systems at Etsy and A9.

  • Aaron Tietz
    Solutions Engineer

    Aaron used to be a preschool teacher in San Diego, often answering to the name King Triton #LittleMermaid #makebelieveontheplayground. More recently, he writes and films sketch comedy skits, somehow convincing his friends to be in them. Also, he loves bananas. And laughing with people. And bananas.

  • Alex Paino
    Software Engineer

    Alex enjoys rooting for the St. Louis Cardinals, hiking, travelling, and eating Thai food. He recently graduated from the University of Missouri, where he did ML research while earning BS's in Math and Computer Engineering. Prior to Sift, Alex interned at Microsoft and Facebook.

  • Andrey Gusev
    Tech Lead

    Andrey enjoys machine learning, search, NLP, and distributed systems. Before Sift, Andrey was a lead engineer at Salesforce working on search and machine learning systems; a grad student researching NLP at Stanford, and a student at Illinois.

  • Che-Liang Chiou
    Software Engineer

    Che-Liang enjoys reading comics. He wrote firmware for Chrome OS and data logging service for Android at Google. He is a terrible driver by the way.

  • Crystal Leanza
    Executive Assistant

    Crystal loves hardware stores, infographics, and Earl Grey. In her free time she wanders the wilderness looking for interesting rocks. Prior to Sift, she spent time in the Peace Corps and nonprofit realm.

  • Doug Beeferman

    Doug loves analyzing and visualizing data. Before Sift, he worked at Google on ads quality, IP geolocation, speech recognition, and economics; a research scientist at Lycos and a grad student at CMU.

  • Emily Chin
    Brand Manager

    Emily loves proper grammar, sending gifs, eating cake, reading books, beach naps, and petting dogs. She holds a Master in Public Diplomacy, and brings experience in team building, branding, and experiential marketing.

  • Erica Schild
    Trust & Safety

    Erica loves solving complex business problems and creating change in organizations. Prior to Sift, she worked on implementing new regulatory requirements for a regional bank. She studied Russian at Yale and enjoys cooking, music, yoga, and traveling.

  • Eugenia Ho
    Product Designer

    Eugenia enjoys pina coladas, playing video games, eating and watching movies. She recently graduated from UC Berkeley with a degree in Art History and Art Practice. Prior to Sift, she worked as a product designer at Klout.

  • Galen Cook
    Web Developer Intern

    Galen, a UNC grad, formerly taught math and science to 7th graders in Hawai'i. Spoiled by tropical life, she still hasn't gotten used to the "cold" here in San Francisco, but regardless likes to spend as much time outside as possible. She is regularly seen doing cartwheels and ogling at passing puppies.

  • Gary Lee
    Software Engineer

    Gary loves the outdoors and enjoys creating nice things that augment data with human intellect. He graduated from Stanford with a BS and most of an MS in Computer Science. He has worked as an Engineer and a Product Manager at Apple and Nextdoor.

  • Hilfi Alkaff
    Software Engineer

    Hilfi loves traveling, playing badminton and trying out new bubble tea places in the Bay Area. He is a proud graduate of UIUC and UC Berkeley.

  • Jacob Burnim
    Software Engineer

    Jacob joins Sift after finishing his PhD on lightweight specifications for parallel software at UC Berkeley. Before Berkeley, he applied machine learning to search ranking at Google.

  • Janice Lan
    Software Engineer

    Janice loves traveling, music, table tennis, cute animals, and Japanese food. She hopes to make the world a better place with machine learning and AI. Prior to Sift, she did her bachelors and masters in Computer Science at Stanford.

  • Jason Kulish
    People Operations

    Born and raised in the Bay Area, Jason started his career teaching English in Japan and has worked in tech since 2006 for companies like Google, Return Path, and Thumbtack. He is a proud Bruin, likes traveling, eating burritos, and is a huge film buff. He recently took a surfing lesson in Hawaii and is pretty confident he's the next Kelly Slater.

  • John McSpedon
    Software Engineer

    John enjoys climbing, (mountain) biking, outdoor sports, and travel. Prior to Sift he interned at Facebook and studied CS at Princeton.

  • John Wu
    Business Operations Associate

    In his free time, you are likely to find John trying to cook a new recipe, planning his next adventure, or working towards a one minute handstand. Prior to joining Sift, he was a consultant at McKinsey serving mainly tech and retail clients. He graduated from Stanford with a degree in Computer Science.

  • Kai Morrison
    Operations Manager

    Kai loves developing organizational procedures, best practice policies, and other things that people usually want someone else to do. In addition to the occasional stage performance as an actor, he also designs Fight Choreography for stage and film, writes music, and plays waaaaaay too many board games.

  • Kanak Biscuitwala
    Software Engineer

    Kanak is a huge sports and technology enthusiast. Prior to joining Sift, he built distributed systems at LinkedIn, and brought mobile and social to journalism and finance at Stanford.

  • Kaoru Kohashigawa
    Software Engineer

    You can typically find Kaoru programming, snowboarding, mountain biking, playing Magic cards, or eating. He's certain he doesn't pronounce his name correctly. Coming from Hawai`i and Texas, he has great appreciation for Bay area weather.

  • Katherine Loh
    Solutions Engineer

    Katherine enjoys baking, rock climbing & chasing her dog. Prior to Sift, she supported strategic partnerships for Google Chrome and Google Registry.

  • Keren Gu
    Software Engineer

    Keren loves sailing, math, cats, hiking and camping, reading modern literature over warm beverages, and obsessively organizing things into their perfect places. Prior to Sift, she received her Master's from MIT in Computer Science.

  • Lynda Phan

    Lynda is a Bay Area native and loves dogs, garlic noodles, HIIT and dessert. Prior to Sift, Lynda recruited for Google, in addition to companies within Finance, Accounting and BioPharma industries.

  • Marcus Rider
    Business Development Associate

    Marcus loves the outdoors, traveling, and eating. He graduated from Carleton College, where he studied religion and played rugby. Before Sift he was studying Arabic in the US and MENA region.

  • Megan Mann
    Product Manager

    Megan enjoys organizing items and learning new things. Prior to Sift, Megan worked in customer support and product management at Bridgewater Associates, building analytics tools for economists.

  • Micah Wylde
    Tech Lead

    Micah loves building reliable distributed systems, folk music and the outdoors. Before Sift he was working on large-scale data processing infrastructure at Quantcast.

  • Michelle Arguelles
    Account Manager

    Michelle loves traveling, a good sitcom, and a good cheese. Prior to Sift, she worked as a Risk Analyst at WePay. She graduated from Boston College with a degree in International Studies.

  • Miguel Veloz
    Strategic Account Manager

    Miguel enjoys cooking, politics, reading, foreign languages, and all-night discussions on the nexus of art and pop culture. He's on a quest for the perfect London Fog. He graduated from Yale and worked in Google's Large Customer Sales division for several years.

  • Nick Hurlburt
    Software Engineer

    After working at Amazon, Nick did humanitarian work in Asia and Africa before coming back and finding a place at Sift. He continues to volunteer with non-profits when he isn't hunting for the best khao soi in San Francisco.

  • Nick Priestley
    Account Executive

    Nick enjoys stand up comedy, collecting sneakers, and finding new restaurants in the Bay Area. Before joining Sift, Nick worked as an Account Executive at Twilio and a Manager at Apple Retail.

  • Nikhil Chari
    Account Executive

    Nikhil enjoys travelling and learning new things. Lately he's been getting back into basketball. Prior to Sift, he worked as an Account Executive at Twilio and Checkr, and played poker before that.

  • Noah Grant
    Software Engineer

    Noah loves third wave coffees and mid-shelf bourbons, and can often be found dreaming of biking from one end of Europe to another. He graduated a few years ago from UC Berkeley and previously worked in three other engineering disciplines before getting hooked on programming.

  • Richard Fan
    Software Engineering Intern

    Richard enjoys the challenge of a good puzzle or strategy game. He is currently studying computer science and machine learning at Carnegie Mellon University

  • Saad Munif
    Sr. Manager Demand Generation

    Saad enjoys playing and watching sports, mainly football and basketball and is usually busy chasing around his two toddlers. Before Sift he was responsible for lead generation at Twilio and online marketing at Sybase.

  • Saam Talaie
    Engineering Manager

    When he's not out hiking or practicing his photography skills, Saam is working on problems at the intersection of engineering and machine learning. Prior to Sift, he built systems powering Apple’s retail and online stores.

  • Samir Rao
    Business Operations Associate

    Samir enjoys watching mind-bending thrillers, consuming tacos and other delicious food, and thinking about how to make life more efficient. Prior to Sift, he was an investment banker at JP Morgan.

  • Sarah Beldo
    Sr. Content Marketing Manager

    Sarah loves words, design, food, traveling, and living in the Bay Area. Before Sift, she worked with content at LinkedIn, LexisNexis, and a handful of smaller companies.

  • Sarfaraz Rydhan
    Sr. Business Development Manager

    Sarfaraz is an avid fan of the Oakland Raiders and enjoys watching 90's cartoons with his boys. Prior to Sift, he worked at ecommerce companies as an engineer and entrepreneur.

  • Tai-Jin Lee
    Software Engineer

    Tai-Jin enjoys playing piano, playing and watching Starcraft, munching on esoteric foods, and automating everything. Before Sift he was the jack of all trades at HealthLoop and TrialPay.

  • Taylor Lentz
    Software Engineer

    Taylor loves Senor Sisig, ice cream, Ultimate, swimming, hiking, math, and shoes. Taylor graduated from Tufts and in the past she has spent time at Rdio, Salesforce, Google, and MobileRealtyApps.

  • Vinson Lee
    Business Operations

    Vinson is an adventurer and loves building rockstar teams. Prior to Sift, Vinson led operations initiatives for Google Payments and Google Play Risk teams as well as data driven optimization for Disney Parks and Resorts.

  • Vishal Arya
    Business Development Manager

    Vishal enjoys economic history, basketball, and the (slow) journey towards membership in the 1000-pound club. Prior to Sift, he led merchant partnerships at Marqeta and worked in business development at Intel.

  • Warren Harper
    Sr. Designer

    Warren loves surfing, skydiving and the outdoors. Prior to joining Sift, he worked as a designer at Red Bull and lead creative for a Big Data startup. Originally from South Africa, he moved to California in 2013 and loves it.

  • Yoav Schatzberg
    Solutions Engineer

    Yoav enjoys rock climbing, surfing, exploring San Francisco, and all-you-can-eat restaurants of all types. Before Sift Yoav worked as a Software Engineer on Software Defined Networking at Intel.

  • Zorah Fung
    Software Engineer

    Zorah spends her free time cooking, crafting, solving puzzles and building a collection of musical instruments. In addition to working at Sift, Zorah will be joining the UW CSE Faculty as a Lecturer in January 2016 to fulfill her passion for teaching.

Our believers.

  • Max Levchin

    PayPal Co-founder

  • Marc Benioff CEO

  • Alexis Ohanian

    Reddit Co-founder

  • Garry Tan

    YC Partner

  • Kevin Scott

    LinkedIn SVP Engineering

  • Rich Barton

    Expedia & Co-founder

  • Lee Linden

    Karma CEO

  • Harj Taggar

    YC Partner

  • Alex Rampell

    TrialPay CEO

  • Chris Dixon

    Andreessen Horowitz Partner

Like what you see? Join the team!

We're building an incredible machine learning, big data, cloud, SaaS company in the heart of San Francisco. But hey - we're not all about buzzwords. We're also about defeating evil and making the internet a safe place for everyone!

See open jobs