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The Barcelona Build: Mainloop's One-Week Hackathon

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The Barcelona Build: Mainloop's One-Week Hackathon
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About this hackathon

A one-week hybrid hackathon from Mainloop AI for recent grads and early-career engineers. Three real engineering problems drop on Jan 8, 2027 at 6 PM CET; pick one and build it solo by Jan 15, 11:59 PM CET, submitting code in a private GitHub repo plus a demo and write-up. The final is on Jan 23, in Barcelona or remotely, and finalists get an interview with Mainloop's engineering leads (travel and lodging covered for in-person finalists). Free to enter, 18+, individuals only. €10,000 cash to the winner, with prizes down to 10th place.

Status
Deadline
2027-01-08
Starts
2027-01-08
Who
Open to all (Individuals only, 18+; aimed at recent grads and early-career engineers)
Level
Intermediate
Prize
€10k · €10,000 cash for the winner; prizes go down to 10th place (amounts for 2nd–10th not published)
Size
—
Format
Hybrid · 巴塞罗那 · International
Location
—

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Original listing (Chinese)

The full original listing below is in Chinese, as published in the Hack123 newsletter.

一句话简介：Mainloop AI 主办的一周混合式黑客松，⁠‌‍‍‌‍‍‍‌‍‌‌‌‌‍‌‍‍‍‌‍‍‍‌‍⁠面向应届毕业生与职业早期工程师，围绕真实工程问题自选 1 道题目独立开发，决赛可到巴塞罗那线下参加或远程参加。

看点：仅限个人参赛，须年满 18 岁；1月8日 18:00（中欧时间）公布 3 道题目，1月15日 23:59（中欧时间）提交截止，提交内容包括代码、私人 GitHub 仓库、演示与复盘说明；决赛 1月23日举行，入围者获 Mainloop 工程负责人面试机会，线下决赛选手的差旅住宿由主办方承担。

奖金：冠军 10,000 欧元现金，奖金发至第十名；第二至第十名金额官方未公布。

报名：免费报名，报名随 1月8日题目公布截止。

截止日期：2027年1月8日（混合，巴塞罗那）

活动日期：2027年1月8—15日（混合，巴塞罗那）

Summarized from the organizer’s page and public posts. Please confirm details on the official site before registering.