Bump is one of the most popular free iOS apps of all time (more than 65 million downloads, 7th in US, 3rd in Japan). Bump (bu.mp/) is the mobile application which lets two smartphones to share contact information / schedules / photos / app recommendations / etc. by simply bumping phones together. After the recent partnership with PayPal, you now can exchange money using Bump. Bump is funded by Y Combinator, Sequoia Capital, Andreessen Horowitz, SV Angel, Ron Conway, Ram Shriram and the others.
Questions addressed in this interview:
What is Bump?
The origins of the idea for Bump
How to start a startup: 2 ways startups are formed
YCombinator experience: launching before applying
Make something people want
How did Bump look like on the YC demo day?
Challenges of the network effects product: from the risk to the asset
Thoughts on NFC (Near Field Communication)
Closest pair problem from Computational Geometry
Retention rate and usage across different features
Countries where Bump is big: US, UK, Japan
Reasons why Bump is the 3rd most downloaded mobile app of all time in Japan
Stats: the total number of downloads, the number of active users in the last 3 days
The key lesson learned as the first time entrepreneur
Technology stack: Objective-C, Java; C and Python on cloud servers
Hiring at Bump
Applications built on top of Bump API
5 whys: underneath any technical problem lies the human problem
Viral engine growth at Bump
Blogs and books: Paul Graham’s essays, TechCrunch, Ben Horowitz’s blog; ‘The Facebook Effect’, ‘Emotional Intelligence’, ‘Steve Jobs’
The vision for Bump
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