You know that addictive mobile phone game Dots? Patrick Moberg, the guy behind it, is only 26. The co-founder of Instagram is still only 27.
And Alexandra Jordan, creator of Super Fun Kid Time, is only 9.
What are you doing with your life?
These fresh-faced, under-30 developers are creating apps that run the gamut from games to productivity tools, for Android, iOS, and even Google Glass. And their ages range from 29 all the way down to nine.
Name: Udi Cohen
Role: Lead Android developer
Cohen develops the Android version of Any.Do, an app which allows users to enter a task on their phones, and have it show up across different platforms. Before he came to Any.Do, Cohen worked as an engineer for the Israel Defence Forces.
Name: Greg Wohlwend
App: Ridiculous Fishing
Wohlwend loves creating games. Other than Ridiculous Fishing, which won Apple's Design Award this year, he's made Hundreds, Puzzlejuice, Solipskier, and Gasketball, several of which have won, or been finalists, for awards at the Independent Game Festival.
Name: Alexandra Jordan
App: Super Fun Kid Time
Jordan won hearts when she presented her playdate app at TechCrunch Disrupt earlier this year. Although the app hasn't officially launched, 5,000 people have already signed up. Jordan is a coding advocate, recommending it for anyone craving a 'brain boost,' and says it keeps her calm.
Max Weiner develops the Android app for Pocket, the company that lets you easily save whatever you find on the web.
Name: Max Weiner
Role: Android developer
Weiner was a freelancer for a while, until he jumped on the Read It Later team with his identical twin brother Nate (Read It Later was Pocket's precursor). He built, and continues to work on, Pocket's Android app. Oh, and he owns an adorable, bow-tie wearing dog.
Ryan Furboch came up with the idea for his task management app, Finish, while studying for his 10th grade finals.
At 26, Mohammed Jisrawi snagged a job at Apple after working as an iPhone developer for Foodspotting.
Jin Park created the apps for New York City-based Fancy, a company that gives users a place to discover and buy cool products.
Kevin Gibbon and Joshua Scott's attachments.me lets Gmail users manage their email attachments from the cloud.
Ages: 29, 29
Roles: Lead mobile engineer, lead user experience engineer
Gibbon and Scott, both Canadian, met while working together at attachements.me. Because they clicked, the two are currently working on another app called Shyp, which simplifies the shipping process.
Name: Jared Hecht
Hecht was an early Tumblr employee before co-fouding messaging app Group.me, which sold to Skype for around $US85 million. He just left the company this year and is now reportedly working on a new finance related startup.
Matt Cahill works with Quip, an app that helps you create beautiful documents across a range of devices.
Name: Michael Phelps
App: Battery Go
Phelps developed the app Battery Go with college friends Jeff Lange and Cameron Banga, and only 48 hours after they launched it, the app reached the top 100 on Apple's list of paid applications. He's now working for app development company 9 Magnets.
Name: Alex Fishman
Before founding Delectable, Fishman fought financial fraud at Palantir Technologies. He used his knowledge of large scale data integration to create Delectable's enormous database of wine makers and varieties.
Victor Mathieux brought the world Everest, an 'action-network' designed to help you achieve your loftiest goals.
Mike Krieger, Instagram co-founder, built the very first version of the app years ago and now leads its engineering team.
Name: Colin Kroll
Role: Chief Technology Officer
Kroll co-founded Vine with Dom Hofman and Rus Yusupov and the trio sold the company to Twitter for about $US1 million. Before founding Vine, Kroll and Hofman worked together at Jetsetter, Gilt Groupe's travel site.
Name: Charlie Nowacek
Role: Mobile Team Lead
Before coming to Crowdtilt, Nowacek founded Simjam, an SMS mobile ad platform, and worked as an iOS Software Engineer at Zoosk. When he's not pounding out code for Crowdtilt, he's mentoring the robotics team at his high school in San Antonio Texas.
Name: Matthew Jackson
Role: iOS7 Developer
Jackson has been coding since he was six. Since then, he's fallen in love with designing and coding new apps for sales people through ClearSlide.
Braeden Kepner is developing the Google Glass app for Evernote, which allows users to write and organise notes.
Name: Alex Godin
Godin, at 17, was the second youngest person to ever participate in startup accelerator TechStars. He taught himself to code in seven days and founded the Dispatch, which will soon merge with Meetup.