5 months ago

And the winner is...

The judges have weighed in, and we're excited to share the news! Go to the Square: Build what’s POS_sible gallery to congratulate the winners and check out all of the awesome submissions. Check out the Square blog post!

Even though the competition is over, you don't have to stop coding. Update your portfolio to inform your followers about new projects and get feedback from fellow hackers.


If you have any questions about the hackathon, please post on the discussion forum.

6 months ago

A bonus prize for giving feedback

In case you were looking for another opportunity to win prizes, we’ve got you covered. 

Enter a Feedback Submission about the Square APIs by December 2nd at 2PM ET and you may be eligible for a Feedback Prize.


  • I didn’t submit but I’m registered, can I participate? Yes! Even though you didn’t have time to submit a project, as long as you’re registered, you can still participate.

  • How do you enter? Fill out this submission form before December 2 at 2PM ET.

  • What kind of feedback is valuable? Actionable feedback that Square can use to improve the product (for

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6 months ago

Final Call: Submissions close November 22

Reminder, this is your final shout-out! These are the last few days to work on your project and submit to Square: Build What’s POS_sible.

Final Checklist:

Have you built (or updated) an app using Square’s featured Point of Sale APIs?

In order to qualify, your submission must include:

  • :film_projector: 3-minute demo video showcasing the functionality of your app.

  • :gear: Link to access to your working application (e.g. test build, website).

  • :pencil: Responses to all required fields on the submission form. 

Be sure to read through the official rules more than once. Or better yet, have a friend or colleague provide a second pair

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7 months ago

Two weeks to go – submit early!

There are two weeks left to enter your submission to Square: Build What’s POSsible. Submissions are due November 22nd at 5:00PM EDT. 

Submission checklist

Run through this list before you sit back from your project:

  • Are you building an app using Square’s featured Point of Sale APIs?

  • Have you created a submission video? Does your video meet the competition guidelines? (See our video-making best practices.)

  • Did you include a link to your working app within your submission?

Be sure to read through the official rules more than once. Or better yet, have a friend or colleague provide a

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7 months ago

Let us help in your building journey

There are 24 days until the submission deadline (today is October 29 :ghost:) and you need to build a creative application using at least one of Square’s featured APIs (below) that improves the experience for sellers and/or their customers.

If you’re feeling a little overwhelmed, let’s break it down together.

:thinking_face: Brainstorm. 

Have you identified a use-case that could use a creative solution? Check out The Square Unboxed Hackathon project gallery — there were solutions to increase customer engagement, maximize efficiency, and help business owners manage transactions seamlessly. 

Example issue: Business owners are

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7 months ago

Collaboration, Resources + More To Help You Build

Whether or not you have started building your hackathon project, the Slack channel is the perfect place to connect with other developers!

Not only can you bounce ideas off each other and ask other developers for technical help, but you can also use the Slack channel to ask the Square and Devpost teams questions!

Teaming up

Looking for a challenge team? The Slack channel can also help you connect with potential teammates. You can also use the challenge Participants Tab to search for other developers looking to team up, check out their skills and message them to see if

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