​</time2build> comes to 2140

​Introducing </time2build>: a one-of-a-kind worldwide developer challenge to bring Bitcoin into the open-source apps we use every day.

​​Backed by a $25,000 prize pool and partners including Tether, Lightspark, Plan ₿ Network, Fulgur Ventures, and Draper University, the challenge marks a defining moment for developers to bring magic internet money to the apps millions already use.

​​Since October 7th, developers around the globe have been showcasing their skill and creativity by integrating Bitcoin using the Breez SDK. From November 16th, participants will work with project maintainers to merge their code — ensuring what they build actually ships. Winners will be announced on January 8th, 2026.

​​Now, the challenge makes its way to 2140 in Amsterdam — giving builders, developers, and Bitcoiners the chance to come together to push the movement forward, build integrations that accelerate Bitcoin’s utility, and help value finally move like information.

​​Why Open-Source?

​​Open-source software already powers the internet and the tools we trust. Bitcoin is no exception. Being open-source is one of the ways Bitcoin maintains its openness, borderlessness, and sheer unstoppability.

​​By adding open-source value to open-source apps, we’re improving both. Open-source is how we pave the way to a new economy without walled gardens, free trillions in captive value, and make bitcoin as easy and ubiquitous as the Like-button.

​​What Can You Build? Anything.

​​</time2build> is about much more than your uncle’s fintech. Think bigger. With the tools at our disposal, every app, every service, and every platform can move value as easily as information. That’s what you’re here to build.

​​We call on builders everywhere to build messaging apps that let users send sats like DMs, real-time tipping to content creators of all kinds, and social apps that let users raise funds and split bills with the ease of liking a post. You can build an app that responds to use cases we haven’t even imaged yet.