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Dave Sifry

Entrepreneur, Product and Engineering Nerd


Started and built 6 companies - both venture-backed and bootstrapped, and operated as an executive in areas ranging from productivity systems, mobile apps, enterprise software, linux services, wireless, blog search, travel guides, digital health, and behavioral analytics.   Regular speaker on leadership, user-centered product development, blogs, and the massive changes in the digital media environment. 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, including Causes, Mozilla, Alynd,, MeetingQ, and Merchant Atlas.  B.S. in Computer Science from Johns Hopkins University. Lived and worked in Kobe, Japan for Mitsubishi Electric, and speaks Japanese in a rusty kansai-ben.

Work experience

March 2017Present

VP Product and Engineering

Lyft, Inc.
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. The company was founded by Intel and Facebook engineers who were core to solving difficult scaling and infrastructure challenges and built technology such as Hive, Cassandra, SCUBA, and  Scribe.  By helping solve some of the hardest scalability and infrastructure challenges at Facebook, Interana’s founding team saw the benefit of bringing these solutions to the broader market and empowering everyone to be data-informed.

Jul 2015Mar 2016

VP Product and Engineering

Addapp Corp

Addapp aggregates data from health apps & activity trackers and turns them into actionable recommendations and positive interventions. Hired as Head of Product in July 2015, and promoted to VP Product and Engineering in October 2015.   Responsible for all of Addapp's products and engineering efforts. leading the process of research, ideation, design, development, and operations.

Dec 2013Feb 2015

VP Product and Engineering

Handle, Inc.

Handle is a productivity system that combines to-dos, email, and calendar so you know exactly what you need to accomplish today, tomorrow, and beyond. Hired as VP Engineering in December 2013, and promoted to VP Product and Engineering in December 2014. Responsible for defining the product set, testing assumptions with users, recruiting and leading a team of 15 product managers, designers, engineers, and testers. Helped the leadership team to fundamentally re-think their cost structure and technical architecture, recruited staff, invented and built a fully decentralized set of consumer internet products for iOS and the web that was featured by Apple's App Store for months, resulting in over 100,000 downloads. Was responsible for managing the capital cost structures so that as the user base grew, the company continued to scale, and continued to innovate at scale. 

Nov 2002Mar 2016

Founder and Board Director

Technorati Media

Technorati Media builds tools and services that accelerate publishers’ programmatic revenues. Worked with the CEO and management team to set Technorati's vision, mission, and business goals, and provides 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.



Mentor at a venture fund/incubator that funds and incubates hardware-focused companies.
Nov 2013Present



Engajer is an easy to use online platform that allows you to create and distribute interactive video content while measuring the audience’s engagement levels. Advising the CEO and team on strategy, product, and fundraising. 


Advisor / Mentor


Xola provides booking and marketing software to businesses offering tours and activities. Worked with them through the StartX program at Stanford as a Mentor.Worked with the CEO and leadership team to help Xola refine their product vision and engage in customer development. 



Mozilla Messaging / Mozilla

Helped Mozilla Messaging build out sustainable revenue models and worked with the executive team at Mozilla to evaluate the business and then advised the board on the reintegration of Mozilla Messaging back into Mozilla Corporation.

Apr 2010Apr 2011


Causes, Inc.

Assisted the founder and CEO on key engineering management decisions, and worked closely with the engineering team as temporary VP of Engineering during a few months when Causes was undergoing explosive growth while in the midst of re-engineering many of their core business processes.


Founder and CEO

Offbeat Guides, Inc.

Founder, CEO, and Chief Bottlecap Washer. 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 from angels and Venture Capitalists. Sold the company in 2012 to Look, Buy Fly Travel.

Nov 2002Aug 2007

Founder and CEO

Technorati, Inc.

Founder and leader of the first blog search engine along ith 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 thought-leading business with over $1M/month in revenue. Coded the initial implementation, and acted as product lead during the early years of Technorati's growth. 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. Built an enduring brand that is still strongly associated today with innovation and the best in social media.

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 for Sputnik Control Center and the AP120, its first flagship router. Won Linux Journal's 2003 Editor's Choice Server Appliance (hardware).

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, providing Linux Technical Support, Professional Services, Training, and Product Certification to companies like Dell Computer, Sun Microsystems, Motorola, Oracle, Compaq, Hewlett Packard, NEC, and others. 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