Organizing a hackathon requires juggling hundreds of moving parts—from attendee registrations and team matchmaking to handling code submissions and managing a live judging panel.

Off-the-shelf event platforms are often too rigid for the unique workflows of a hackathon. Conversely, custom coding a multi-role web application from scratch is too time-consuming and expensive for a weekend event.

Meet "Smart HackOS"—a projects built entirely on Momen. This project illustrates how you can build a scalable, custom event management platform with strict data consistency and visual backend logic, without writing a single line of code.

If you are willing to create your new project using the template the Smart HackOS you can create your new project choosing this template within Momen workspace.

From Fragmented Tools to a Unified Hackathon OS

Smart HackOS is a comprehensive event lifecycle application designed to transition hackathon operations away from fragmented spreadsheets and messaging apps. It solves the logistical bottleneck of managing separate portals for hackers, mentors, and judges by centralizing everything into one unified system. This type of application is widely used by developer communities, corporate innovation labs, and university event organizers.

Building this platform requires more than just a frontend interface; it demands a robust relational database to map users to teams, and teams to projects. Momen enables this by combining rapid visual development with enterprise-grade infrastructure. Software is infrastructure, not just a slideshow. Momen allows you to architect complex relational data and precise logic visually, ensuring you have the speed of no-code with the stability of traditional code.

For more tips on building event tools under time constraints, check out our Hackathon Survival Guide.

Behind the Scenes: Architecture and Logic of Smart HackOS

App Features

• Authentication: Distinct login flows and secure access portals for Hackers, Judges, and Admins. Judges can activate their accounts using specific invite codes via the bindJudge workflow.
• Data Management: Dynamic team creation (createTeam) and member invitations (bindTeam). Final project repository submissions are handled via saveOrSubmitProject, supporting multiple file types and links.
• Notifications: Automated alerts for team acceptance, submission deadlines, and judging results.
• Structured Judging: Judges submit scores through a dedicated judingTeam workflow.
• APIs: Exporting final scores or connecting with external communication tools like Discord or Slack.

How It's Built With Momen

Data Model

The backbone of the app relies on Momen's native PostgreSQL database. We use the Data Model to establish one-to-many and many-to-many relationships, mapping tracks to teams, and linking rubrics to scores. The system isolates identities using specific tables (participant_profile and judge). Foreign keys ensure that no orphaned data exists if a team is deleted, and automated cleanup processes (leaveTeam) remove empty team records to minimize database redundancy.

Backend Logic

We use Actionflow to process complex, ACID-compliant operations. For instance:

• Team Creation: The createTeam flow uses a Loop node to handle random 8-character invite code generation with built-in retry logic, avoiding code collisions.
• Judging Validation: The judingTeam flow checks if all required rubrics are filled. If incomplete, it prevents the submission and flags a missing score error, ensuring data integrity.
• Automated Ranking: The startRanking module utilizes a custom code script to pull all completed scores, calculate weighted averages, and bulk-update the ranking field for all teams on the leaderboard.

Design

The interface is constructed using the visual editor. By utilizing Conditional Views, the app dynamically alters the dashboard layout based on the user's role —showing grading rubrics to Judges and submission forms to Hackers. Furthermore, logic variables stored in a config table (such as juding_start) dynamically control when scoring modules are visible, meaning organizers don't need to republish the app to open the judging phase.

Technical Highlights

• Scalability: Capable of handling high concurrency (up to 5,000 requests per second) during the crucial final minutes of project submission deadlines.
• Modularity: The architecture allows organizers to clone and reuse the platform structure for future events.
• Real-time Capability: Leaderboards and team-join requests update dynamically without requiring page refreshes.

To securely segregate data between judges and participants, the application relies heavily on Momen's Permissions system, applying strict Role-Based Access Control (RBAC).

Development Time and Resource Planning

Building a multi-role platform of this scale from scratch with traditional code typically takes months. By utilizing Momen, a working MVP of Smart HackOS can be architected and deployed within 100 working hours.

Hiring a full-stack development team to build a secure, transactional event management system can range from $15,000 to $50,000. With Momen, you operate on a predictable, resource-based pricing model. You eliminate the cost of external backend hosting and avoid the unpredictable usage spikes common with other no-code platforms.

Explore Smart HackOS

The Smart HackOS project serves as a blueprint for digitizing complex event logistics. It demonstrates how a unified platform can securely manage user roles, relational data, and backend workflows.

To truly understand how relational data and role-based permissions operate, you can create your new project using the template the Smart HackOS and directly explore it into your own Momen workspace. You can inspect the Actionflows and database schema firsthand and start building your own scalable application now without writing code!