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DavID L. Sifry

Entrepreneur, Product and Engineering Nerd


Experienced entrepreneur and executive in areas ranging from Social Media, AI and NLP, transportation, productivity systems, mobile apps, enterprise software, linux services, wireless, blog search, travel guides, digital health, and behavioral analytics. Invited to testify before Congress in 2021 on Social Media and Hate Speech. Selected by the World Economic Forum in 2007 and 2009 to participate in its Annual Meeting in Davos, Switzerland as a Technology Pioneer. Served on the founding board of Linux International, the advisory board of the National White Collar Crime Center, and as an advisor and mentor to a number of companies.  Experiences significant difficulties finding work-life balance. 

Work experience

Aug 2019Present

VP, Center for Technology and Society (CTS)

Anti-Defamation League

CTS plays a unique role in civil society by recommending policy and product interventions to government and industry to mitigate online hate and harassment; driving advocacy efforts to hold platforms accountable and to educate their staff on current threats and challenges; producing data-driven applied research by analysts and a network of fellows; bringing to market technical tools and products that provide cutting edge data measurement and analysis to track identity-based online hate and harassment, including ML-based NLP systems; and empowering targets of harassment by responding to online incidents and working with tech platforms to create safer online spaces.

Aug 2018 Aug 2019


Sifry Consulting, LLC

Product, Design, and Engineering Consulting for clients including Zagg Network (CTO Sep 2018-Jan 2019), MyVillage (CTO, Nov 2018-Jun 2019), and Nurx (Design Thinking and Product development, May 2018-July 2019)

May 2018July 2018

VP Revenue Products

Reddit, Inc.

Responsible for leading Engineering, Product, and Design of Reddit's Revenue Generating Products.

March 2017May 2018

VP Product and Engineering

Lyft, Inc.

Led the development of a number of Lyft's strategic projects, including Transit, the first major new feature in Lyft since its rollout of shared rides. I led the user research, concept, R&D, and prototyping of the service which resulted in a platform for new ride types including trains, buses, ferries, scooters and bikes.

May 2016March 2017

VP Engineering

Interana, Inc.

Interana makes behavioral analytics tools for curious people, providing real-time ad-hoc analytics on enormous data sets for companies like Tinder, Reddit, Asana, and Microsoft Bing. Interana was created with the goal of bringing the same cutting-edge analytics tools found at companies like Facebook to organizations of any size. As VP Engineering, I reduced release cycle time by 40% and increased QA coverage by 60%, resulting in tens of millions of dollars of new revenue, fewer bugs, and happier customers. 

Nov 2002Mar 2016

Founder and CEO, Board Director

Technorati Media

Founder and leader of the first blog search engine along with accompanying publisher tools including an advertising network. Starting as a science project in my basement running on two second-hand servers and my DSL line, built, funded, and grew Technorati to a 80+ person business with over $1M/month in revenue.  Brought on a crack executive leadership team and hired world-class engineers and marketers, and enabled the company to compete and succeed against the titans in the technology sector. Recruited new CEO in 2007, and as board member, helped set Technorati's vision, mission, and business goals, and provided support, advice, and action to help Technorati's continued success in the marketplace. Worked with the board and leadership team to complete the company's sale to Synacor in 2016.


Founder and CEO

Offbeat Guides, Inc.

Envisioned and prototyped the product, a totally customizable set of personalized travel guides, available for over 20,000 worldwide destinations, in both printed and electronic form. Recruited and built the team, and raised funding. Sold the company in 2012 to Look, Buy Fly Travel.

Apr 2001May 2003

Founder and CTO

Sputnik, Inc.

Sputnik provides cloud-managed guest Wi-Fi solutions used in thousands of hotspots across the globe. Responsible for the technical vision, architecture, and implementation of Sputnik's wifi router and control products, resulting in numerous industry awards.

Aug 1998Mar 2001

Founder and CTO

Linuxcare, Inc.

Linuxcare provided an array of technical information and support services to enhance and simplify the use of Linux and other Open Source software, including a news and information portal, Linuxcare University, Technical Support, and Product Certification for Dell, IBM, Compaq, Oracle, Sun, and other Linux providers across all major distributions. Responsible for the vision, technical architecture, and engineering implementation of Linuxcare's core businesses As founding CTO, helped the company define and build its core lines of business, close major deals and partnerships, and grow from the founding team of 3 people to over 480 people in a period of 18 months.


Software Engineer

Mitsubishi Electric, Inc.

Designed and built GUI tools to help factory managers in control rooms at steel mills, nuclear power plants, and hydroelectric power stations get the most up-to-date, real-time information on the current status of their factories. As the first non-Japanese in 17 years to work in the Kobe factory of 4,800 people, provided cultural exchange with Japanese engineers and managers, and mentored new recruits.



Bachelors of Science, Computer Science

The Johns Hopkins University