#c4yt is sponsored by Purse & Cosmos.



Tickets are sold out, and there will be no tickets at the door!

For 48 hours straight, 300 top Crypto, JavaScript & NodeJS engineers in SF will come together to work on open source crypto user interfaces.

Meet some of the top minds in crypto & blockchain, connect with companies that are recruiting in the space, and have a chance to win $30,000 in prizes!



We will be hacking on projects built on bcoin (full-node implementation of bitcoin written in node.js- read more here) and cosmos. There will be a heavy focus on JavaScript and NodeJS. 


Top Prize: $15k in the crypto of your choice*, Ledger Hardware Wallets, Conference tickets (value $1200), 1hr meeting with Terrence Yang, adviser and angel investor at Yang Ventures, Private Internet Access VPN's

 2nd prize: $1k in Purse credit, Ledger Hardware Wallets, Conference tickets (value $1200), 1hr meeting with Terrence Yang, adviser and angel investor at Yang Ventures, Private Internet Access VPN's

3rd prize: $500, Ledger Hardware Wallets, Private Internet Access VPN's

SPONSOR CHALLENGE - Purse Challenge: $500 Purse credit and lunch with Andrew Lee, Purse.io CEO + Co-Founder - More information on the challenge to the right

SPONSOR CHALLENGE - Tokensoft Challenge: $500 prize - More information on the challenge to the right


The venue will be open 24hrs/day & meals, snacks, and drinks are provided.

Friday April 6

6:00pm - Door open, food, drinks & networking
7:00pm - Opening Keynote + Hackathon Instructions, Tech Talks
7:45pm - 9:00pm Team Building
12:00am - Midnight Snack

Saturday April 7

12:00am - Hacking Space Open
6:00am - Morning Yoga (Optional)
8:00am - Breakfast Served

11:00am - Blockstack
12:00pm - Chronobank
2:00 PM - Cosmos
5:00 PM - Tokensoft

7:00pm - Dinner
12:00am - Late Night Snack

Sunday April 8

12:00am - Hacking Space Open
7:00am - Morning Yoga (Optional)
8:00am - Breakfast Served
4:00pm - Presentation Submission Deadline
4:00pm - 5:00pm - Judging Round #1
5:00pm - 6:00pm Final Presentations - Judging Round #2
6:00pm - 6:30pm Winner Accounced + Closing Ceremony
6:30pm - 9:00pm Closing Reception Party





  1. Currently the application is open to all to apply. 
  2. The following people, however, are not eligible to participate: individuals who (a) are an employee of ChallengePost, (b) an employee of one of the sponsoring companies, (c) are the immediate family (spouse, parents, siblings, and children) and household members of any of those employees or former employees as stated above; (c) are current employees of an entity in which the companies above has invested and holds an ownership interest; (d) are current employees of a third-party sponsor of the Hackathon; or (e) are residents of Cuba, Iran, Myanmar, North Korea, Sudan, or Syria.
  3. If you are an employee of a corporation, government agency, or an academic institution, you are responsible for ensuring that your participation in the Hackathon complies with any policies your corporation, agency, or institution may have regarding participation in contests of this type. We are not responsible for any disputes arising between you and your employer.


Each team member must register both as an individual and as part of a team at https://c4yt.devpost.com/ by 7:00 AM on April 8, 2018. You may not be part of more than one team.

You must complete your team’s Entry to the Event at https://c4yt.devpost.com/by 4:00 PM on April 8, 2018. Late entries will not be accepted, and incomplete entries will be disqualified.

Entry to the Event consists of:

  1. The Apis/Platforms your project uses.
  2. Selection of the challenge you are competing in
  3. Project title;
  4. Project tagline;
  5. Project description (should be approximately 100-500 words);
  6. Project screenshots or image/logo, with a maximum size of 5mb; format should be JPG, PNG or GIF with a 3:2 aspect ratio;


Hackathon Sponsors


$35,500 in prizes

1st Prize Team

$15,000 in the Crypto of Your Choice from one of the top 10 Crypto technologies.
Conference Tickets for the whole team to BlockWorld. Ledger Hardware for the Team. One Hour Coaching Session. For the top team use bcoin, bPanel, lotionJS, or Cosmos to qualify

2nd Prize Team

$1,500 in Purse Gift cards. Conference Tickets for the whole team to BlockDevCon. Ledger Hardware. One Hour Coaching Session, 2 Year VPN. For 2nd place team using bcoin or lotionJS.

3rd Prize Team

$500 Cash Prize. 2 Years VPN Service. For 3rd place team using bcoin or lotionJS.

Purse Challenge

To the best team that chooses to solve one of these:

1) Most useful business accounting tool built with bPanel (e.g. transaction exporter for taxes, payroll, budget management tool
2) Best tool to help reduce fees or more efficient fee management (e.g. Coin selector, fee estimator, mempool tracking)

Win a $500 purse.io gift card for big savings on Amazon using crypto and lunch with Andrew Lee, Purse.io CEO + Co-Founder

Devpost Achievements

Submitting to this hackathon could earn you:


Christopher Jeffrey

Christopher Jeffrey
CTO at Purse.io and Lead Developer on bcoin

Jae Kwon

Jae Kwon
Lead Developer, CEO & Co-Founder of the Cosmos project

Marjorie Kasten

Marjorie Kasten
Senior Payment Strategist at Silicon Valley Bank

Jinglan Wang

Jinglan Wang
Executive Director at Blockchain Education Network

 Conner Fromknecht

Conner Fromknecht
Head of Cryptographic Engineering at Lightning Labs

Judging Criteria

  • Implementation/Execution
  • Potential Impact
  • Feasibility
  • Presentation

Questions? Email the hackathon manager

Tell your friends

Hackathon sponsors

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