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The official Hackathon of ETH BCN

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We are a strong community in Spain organizing the official Hackathon in Barcelona during Blockchain Week. ETH weeks usually focus on development and not just networking. That's why we want to offer an experience that will be memorable.


In this document:

“Prizes”: refers to the prizes awarded to the Winners at the end of the Challenge.

“Overview”: refers to the specifications determined by the Organizer, which may include the deadlines, the prizes, the guidelines and themes to be complied with by all Innovators contributions.

“Challenge”: refers to the challenge that is the subject of the Rules, as organized by the Organizer. 

“Intellectual Property Rights” means all the following ownership legal rights, worldwide, whether registrable or unregistrable, and whether registered or unregistered, with respect to any designs, trade secrets, copyrights, works of authorship, neighboring rights, mask works, Know-how, Software and all the industrial rights, such as trademarks, industrial designs or patents;

“General User Terms & Conditions and Privacy Policy”: designate the general terms of use of the TAIKAI’s website and its Privacy Policy, accepted by every Innovator during the creation of a TAIKAI user account and readable on taikai.network

“Projects”: refers to the Team and to all submissions, original ideas, documents or other materials (such as presentations, videos, code, websites, etc.) uploaded to the Website by Innovators in response and as a solution to this Challenge; 

“Jury” - a group of persons approved by the Organizer, which evaluates the results of the Team's work, determines the Winners and prize-winners of the Hackathon.: 

“Innovator”: refers to any person registered in accordance with the Rules who takes part in the Challenge. 

“Registration”: refers to the registration of an Innovator in accordance with the Rules. 

“Rules”: refers to these terms, which apply to the Challenge.

“Team”: refers to the team of innovators (2 to 5 per team), created on the platform in order to take part in the Challenge. 

“Team Lead” : main responsible and point-of-contact of a team.

“Mentor”: A person with expertise in one or more fields, who is able to support a team with a specific problem or need. The Mentor is committed to investing time throughout the weekend to assist in the growth and development of others. 

“Winner” or “Winners”: refers to the members of the three (3) Projects that reach the final stage of the Challenge and are ranked by the Jury members  as winning teams. 


3.1. Rules are intended to define the terms and rules of participation in the Challenge organized by TAIKAI. Rules are destined to complete the General User Terms & Conditions and the Privacy Policy of the TAIKAI Platform, which can be downloaded through the links provided previously. In the event of inconsistency between these rules and regulations and those of the Terms & Conditions and Privacy Policy, these Rules will prevail. 

3.2. The Innovator should be aware and agree to the fact that the proposed Challenge calls on his/her wisdom, skill, and cleverness during extremely difficult trials. The Challenge shall not depend, even partially, on chance and luck under any circumstances, and can therefore not be considered as, or resemble a lottery.


4.1. Participation in this Challenge is free 

4.2. The Innovator must read these Rules, and fully accept their terms in their entirety without reservation before its Registration and participation in the Challenge. 

4.3. Participation to the Challenge is under the conditions of: being any person on legal age 

4.4. The Innovator guarantees that he/she will abide by the rules mentioned above. The delivery of the Prize will be conditional upon the capacity of the Innovator to meet the conditions stated. 

4.5. There is only one entry per person in the Challenge 

4.6. Innovators may have as many people in their team as they’d like, but we can only host a maximum of 4 people at the venue. There must be at least one person to pitch your project in-person. 

4.9. Any Innovator and/or Team who doesn’t abide by the terms of the Rules during his/her Registration and at any time during the Challenge will be automatically and without previous notification, disqualified from the Challenge and shall not be awarded any Prize. In the case where a Prize would have been given to an Innovator and/or Team who doesn’t or didn’t comply with the Rules at the time of his/her Registration or during the Challenge, the Organizer has the discretionary right to demand the return of the Prize received.

4.10  Minimum requirements for Hackathon participants:

  • You have professional background related to IT, Data, Product management, design, marketing, engineering, system architecture, entrepreneurship.


5.1. For his/her Registration to the Challenge, each Innovator must open a user account on taikai.network and must indicate the following: 

  • A valid username 

  • A valid email address 

  • A valid password To validate his Registration, the Innovator must accept the General Terms & Conditions and Privacy Policy provided by TAIKAI.

To complete his/her Registration in the Challenge, the Innovator must opt-in on the box indicating that he/she accepts the Challenge Regulations.

A confirmation email containing a confirming link is sent to the Innovator’s listed email address. Once his/her account is confirmed, the Innovator can freely participate and complete their profiles. 

5.2. Any Registration containing wrong, dubious, or incomplete information shall not be taken into account and disqualifies the Innovator and/or the Innovator’s Team from the Challenge. 

5.3. By registering, the Innovator accepts being contacted through email by the Organizer, for the duration of his/her participation in the Challenge. 

5.4. When you register for a hackathon, write a brief description to introduce yourself. Describe your experience, languages and technologies you’re most interested in using, or an idea you’d like to build (the description will now appear under your name on the Innovators page).

Innovators Page

Using the hackathon’s Innovators page, you can look for teammates and send team-up requests to whomever interests you.

Discussions Page

If there are discussions posted, chime in and participate. You can also start a conversation and you may receive technical advice, support, and ideas from other participants.


IMPORTANT: You must first register as an Innovator on TAIKAI so you can join our Slack workspace where you gain access to the community.

You can register as a team or as an individual. Both cases are very welcome at the hackathon.

Teams in this hackathon can be both made before the hackathon, or made during the hackathon. The maximum number of team members is 4. You are allowed to form teams until March 3rd 12:00 PM CEST.

Try to have a wide variety of skills. Recruit designers, developers, medical specialists and others. This way, your solution will be a result of the convergence of not one, but two or more different points of view. 


If you could not find a team to join, fear not. That’s why we’re here :) More information will follow closer to the event. 


8.1. The Challenge shall take place from the 8th - 10th of July 2022. 

  • The Challenge will be revealed and registration will begin on the 21st of June 

  • Registration and project submission for participation will close on the 10th of July at 14:00

  • After the registration closes participants must start working in a team

  • Project selection and announcing the winners will occur on July 10th  

8.2. Every date clearly defined in these Rules and the Challenge is in the German time zone (CET), and refers to the year 2022.

8.3. Where necessary, due to operational requirements, the Organizer reserves the right to alter the duration of the Challenge by a reasonable amount of time, which will be conveyed to Innovators. 


9.1. The Challenge consists of making contributions formed by three (3) deliverables which are in accordance with the requirements listed in point 8 and 9, during the two steps of preselecting and selecting. 

9.2. The deliverable must absolutely respond to the Challenge definition and rules described in this document. The deliverable must be written in English; no other language will be accepted. The Organizer will not accept nor review any other documents submitted by the Innovators. 


10.1 The brainstorming and the formalization of solutions is taking place before the hackathon itself. The solutions must be geared towards one of the challenges.  

10.2 You can use these challenges as a guidance - you can choose to solve the challenge partially or, in contrast, merge two challenges into one solution. Of course, if you are an idea-making machine, you can always use your own avant-garde solutions and assemble teams around them. The bottomline is: there are no restrictions on solutions! Just, once you settle on them, assemble a team around it!


The use of photos or images must be free from copyright. In any case, the Organizer will not be held responsible for the use of Intellectual Property for which third parties have rights. 


13.1. Definition "Intellectual property rights" refers to any Invention, any copyright or other rights over a brand or model and, more generally, any element that may be protected by international laws or conventions on intellectual property.

13.2. Any Project involving several Innovators constitutes collaborative work. 

13.3. As such, the Organizer is free to reproduce the Projects, to distribute them, to inform the public about them and to modify them. If the Projects are modified, altered or adapted, the Organizer may distribute the resulting derived work only in accordance with the terms agreed on these Rules. 

13.4. Each Innovator guarantees that he/she is the co-owner and co-holder of the Intellectual Property Rights regarding all or part of the deliverables submitted as part of the Challenge for the Project of which he/she is a member, and that he/she has obtained all rights and permissions regarding all pre-existing elements and any elements for which he/she does not hold the rights if these elements are to be included in the deliverables of all voting phases. Each member of a Participating Team guarantees that his/her application is original and unprecedented, that it does not infringe upon the copyright of any third party, and that all the elements of which it is formed, as well as all pieces of information communicated in the application presentation document, are accurate, reliable and complete. It is compulsory for Innovators to indicate the source of any pre-existing elements (music, text, images, etc.) that are included in the deliverables. 

Each Innovator ensures a good use of the deliverables provided by the Organizer, and as such ensures: 

  • that the deliverables submitted by the Team of which he/she is a member is original 

  • that it does not infringe on or imitate any copyright, patent, brand or any other intellectual property belonging to a third party, 

  • that it does not constitute an act of unfair competition or parasitical competition of any kind. 

  • that all the elements of which it is formed, as well as all pieces of information communicated in the deliverables, are accurate, reliable and complete. 

Each Innovator indemnifies the Organizer and any present and future subsidiaries against any disturbance, action, claim, opposition, demand or eviction attempt from any third party. 

13.5. During and after the end of the Challenge, the Innovators have the right to use and register the Intellectual Property resulted from the Projects created (e.g. code, algorithms, etc.) for their own personal and commercial use, as long as it may continue to be displayed as a project on the TAIKAI platform. 


14.1. The responsibility of the Organizer cannot be engaged in case of breakdown or dysfunction of the used telecommunications network, whatever the cause is, which would have the effect of damaging or preventing the identification or the access of the Innovator on taikai.network or any other useful web site for the participation in the Challenge. 

14.2. The participation in the Challenge implies knowledge and acceptance of the characteristics, limitations and risks of the internet network and the technologies which are linked to it, particularly in consideration of the performances, in response time, in the security of the software and the computer hardware towards diverse potential attacks such as viruses, logic bomb or Trojan horses and in the loss or diversion of data. Therefore, the Organizer cannot be held responsible for the damages caused to the Innovator because of these accepted characteristics, limitations and risks. 

14.3. The Organizer cannot, in any case, be held responsible for any damage caused by the defect or the delay of delivery of the Projects, in particular for the refusal to consider late submissions, or for any damage caused by the impossibility to connect to the relevant websites or to upload/download correctly any delivery, the defect or the delivery time of any email sent during the Challenge, or for any damage caused by any hurdle preventing the Innovator attending or participating in the whole or part of the Challenge. 

14.4. The Organizer cannot be held responsible in case of total or partial modification, suspension, interruption, adjournment or cancellation of the whole or part of the Challenge for reasons beyond their control. In such a case, the Organizer will inform the Innovators as soon as possible via the taikai.network or by any means it sees fit.

14.5. The Organizer cannot be held responsible for the consequences of a disqualification of an Innovator, and/or a Team, due to a violation of the Rules, and/or in case of rejection of a Project due to noncompliance with the Rules.

14.6. The Organizer shall not be liable for any trouble, action, claim, objection, claim related to the use of the Projects of the Organizer not foreseen by the Rules or in connection with the negotiation, execution or performance of contracts that the Organizer would sign with the Innovators. 

14.7. In any case, the Organizer will not be held responsible for the delivery of the Prizes nor in case of impossibility for a Winner to benefit from his/her Prize for circumstances beyond Organizer’s control. The responsibility of the Organizer cannot be engaged in case of loss and/or deterioration of the Prize by post or any third similar service provider and more generally if the Winner does not receive his/her Prize. The responsibility of the Organizer cannot be engaged in case of incidents or of damages of all kinds, which could arise because of the enjoyment of the awarded Prize and/or because of its use. 


15.1. “Confidential Information” is defined in this present Rules, is all the material or immaterial information of whatever nature, in particular administrative, commercial, scientific, technical, financial, fiscal, which was, is or will be communicated by the Organizer to the Innovator, directly or indirectly, and in a non-exhaustive way, orally, in writing, by delivery of paper or electronic documents. Information that is not confidential is:

  • The currently accessible information or becoming accessible to the public without breach of the Rules from the Innovator,

  • The information legally held by the Innovator before their disclosure by the Organizer,

  • The information not resulting either directly or indirectly from the use of all or part of the Confidential Information,

  • The information validly obtained close to a third party authorized to transfer or to reveal the information mentioned above. 

15.2. At the end of the Challenge, because of the emergence of their term indicated to Point 6 or of their cancellation, the Innovator will immediately have to put back to the Organizer all the Confidential Information, whatever their support is, obtained during the Challenge, under penalty of civil and / or criminal liability. The Innovator forbids himself from keeping copy in any form whatsoever, except with an on purpose, preliminary and written agreement by the Organizer. 


16.1. The participation in the Challenge and the awarding of the Prize requires the acceptance purely and simply and the full respect for the Rules in all its terms. The Organizer reserves the right to disqualify, immediately and without compensation, every Innovator and/or Project not satisfying in full with the Rules. 

16.2. The Organizer reserves the right to modify at any time the terms of the Rules, and during the Challenge without the requirement of notification to the Innovator, concerning the application and the validity of these modifications. The Innovator is invited to consult regularly on the Rules. The Innovator gives up expressly any complaint or contesting linked to any modification brought to the Rules by the Organizer. 


17.1. The Organizer reserves the right to cancel, shorten, suspend the Challenge without prior notice:

  • In cases of greater force;

  • If it appears that fraud has occurred in any form whatsoever; 

17.2. The Organizer cannot be held responsible for cancellation or suspension of the Challenge according to the present Point and no allowance nor compensation will be due to the Innovator. 


18.1. The Registration and participation in the Challenge are not, in any way, for effect to create a link of subordination between the Organizer and the Innovator. 


19.1. Any claim of the Innovator must be sent in writing during the last 30 days after the ending date of the Challenge. 

19.2. Claims linked to the functioning of the website taikai.network must be formulated in writing at the following address: TAIKAI Building Connections, Av. Serpa Pinto 311, 4450-718 Matosinhos, Portugal 

19.4. At the risk of being rejected, any claim has to contain: Full contact details of the Innovator (name, first name, address, zip code, city, taikai login and e-mail); The identification of the concerned Challenge; The clear and elaborate presentation of the motives for the claim. 


20.1. In case of persistent dispute after the Innovator has made a complaint in accordance with Point 19, the Organizer and Innovators agree to submit their dispute to an amicable settlement before any court proceedings. 

20.2. The party eager to initiate conciliation must inform the other party through a registered letter with acknowledgement of receipt in which it will make him know his intentions and it will specify the cause. 

20.3. If no agreement is reached between the parties within 30 days of the registered letter reception, parties regain their freedom of action. 


The Regulations and the Challenge are under the German law. You accept that any litigation related to the Challenge will be submitted exclusively to the Courts of Berlin.