A hackathon does not need a rented hall, a catering budget, or a stage. It needs a clear brief, a deadline people believe in, and a place for strangers to become teammates. Moving the whole thing online removes the venue problem and replaces it with a different set: time zones, quiet participants, and the slow drift that sets in when nobody shares a room.

What follows is the full arc — purpose, format, tools, promotion, the weekend itself, and judging — with the details that usually get skipped during the first planning call.

Begin With a Purpose You Can Say Out Loud

Before a name or a logo, decide what the event is for. “We want more contributors to our open-source project” is a purpose. “We want to be a community that has hackathons” is not. The purpose decides the theme, the length, and who gets invited.

A few shapes that tend to work:

• A project sprint: teams build features, tests, or documentation for an existing codebase.
• A themed build: everything must relate to one subject — accessibility, local transit, tiny hardware.
• A learning event: first-timers get paired with mentors, and finishing matters more than winning.
• An internal jam: a company or department builds tools to fix its own annoyances.

Write the theme as one sentence you could put on a poster, then check it against the purpose. If the sentence is vague enough to mean anything, it will produce projects that are impossible to judge.

A theme should make people argue for ten minutes and start coding. If it makes them argue for two days, it is too broad.

Choose a Format and Spell Out the Rules

Length and schedule

A 48-hour weekend suits people who can clear a Saturday. A two-week asynchronous sprint suits working adults and distributed teams, though it needs more frequent check-ins to hold momentum. Pick one, then plan backwards from submission time — including the hour you will spend chasing stragglers.

Teams and eligibility

State team size limits (two to five is common), whether solo entries are allowed, and whether someone can participate from anywhere. Decide early how you will handle participants under the age of majority, since many platforms require guardian consent for minors.

What counts as a submission

Define deliverables precisely: a repository, a short demo video, a written description, a link to something running. Ambiguity here creates the worst job of the weekend — arguing about whether an entry qualifies.

Publish all of it in a single document. One place, dated, with a note at the top whenever you change something.

Set Up the Tools Before You Announce

You cannot improvise the plumbing on Friday night. At minimum you need:

• A chat space with channels for announcements, team formation, help, and off-topic chatter.
• A video room for the kickoff, office hours, and final presentations.
• A code host where teams can create repositories under a shared organization.
• A submission form that timestamps entries and collects every deliverable you listed.
• A shared document or board for the rubric and scores.

Test each piece with two or three people a week ahead. Invite links expire, permissions break, and recording settings surprise everyone at the worst moment.

Promotion That Reaches Real People

Broad announcements bring reach; personal invitations bring attendance. Do both.

Start with the communities you already have: your chat server, mailing list, local user groups, university clubs, and anyone who came to your last event. Ask a handful of them to be team leads before registration opens — a few named humans make the event feel real and lower the barrier for newcomers who would otherwise lurk.

Then write a plain, short description: what it is, when it runs, who it is for, what participants leave with. Post it where developers in your niche actually read — newsletters, forum communities, conference chat channels. Ask organizers of neighbouring groups to forward it. One clear paragraph outperforms a graphic that explains nothing.

Send a reminder 48 hours before the kickoff, and another an hour before. Registrations always cluster at the edges.

Run the Weekend Like a Host, Not a Referee

The kickoff sets the tone. Keep it to twenty minutes: welcome, rules, theme, how to find teammates, where to ask questions. Then get out of the way.

During the event, keep a visible rhythm:

• Post a short check-in every morning and evening.
• Hold scheduled office hours so people can ask questions out loud.
• Watch the help channel and answer within an hour or two where you can.
• Log problems — a broken template, a confusing rule — and fix them publicly.

Silence is the enemy. A participant who hears nothing from organizers for a day assumes the event has quietly ended. Even “nothing new, keep building” does useful work.

Protect the final hour. Freeze submissions at the stated time, confirm what arrived, and tell each team their entry is in. That confirmation removes most of the anxiety around deadlines, and it saves you from a flood of messages at midnight.

Judge With a Rubric, Not a Vibe

Assemble three to five judges with different perspectives: a maintainer, a designer, someone who knows the domain. Give them a written rubric and have them score entries independently before any group discussion, so the loudest voice does not decide the outcome.

A rubric that works:

1. Does the project address the theme?
2. Does it work well enough to demo?
3. How much did the team build in the time available?
4. Is the code readable and documented?
5. How clear and honest is the presentation?

Ask every judge to write one sentence of feedback per entry. For beginners especially, that sentence often matters more than the score. Announce results on a livestream or in a post, thank everyone by name, and publish the winners' summaries along with the rubric so people can see how decisions were made.

The Week After Decides Whether You Do It Again

The hackathon ends; the community does not. Within a few days, send a recap with links to the projects, the rubric, and the people who helped. Then ask participants and judges two questions: what worked, and what would you cut? Their answers are the cheapest planning document you will ever get.

Follow up with the teams that finished something interesting. Offer a channel, a maintainer, or a monthly call where they can keep going. Plenty of good projects die on Monday not because the idea was weak but because nobody asked.

When you write down the next date, keep the parts that carried the event: the short brief, the clear rules, and the volunteers who showed up. Everything else is negotiable.

Photo: Diva Plavalaguna / Pexels