Kevin Loeffler (loefflerlabs)

Cyber R&D engineer from Denver

Colorado, United States
Website
GitHub
LinkedIn

OpenAI Build Week

Featured

Online

Join a global week of building with Codex

$100,000 in prizes
Jul 21, 2026 08:00 PM EDT to submit
32288 participants

Reddit’s Games with a Hook Hackathon

Online

Join Reddit and Phaser to build incredible games for the Reddit community!

$40,000 in prizes
Winners TBD
3080 participants

Hack for Humanity | 2026

Online

Developing software for the environment

Non-monetary prizes
Winners announced
769 participants

Codegeist 2025: Atlassian Williams Racing Edition

Online

Accelerate innovation: Build on Forge, extend Jira, Confluence, Bitbucket, and more— win your share of $120K.

$120,000 in prizes
Winners announced
3509 participants

Kiroween

Online

Build something wicked for Kiroween, our annual Halloween-themed hackathon where developers dare to code in dark mode

$100,000 in prizes
Winners announced
4973 participants

Cloud Run Hackathon

Online

Build applications with Cloud Run

$50,000 in prizes
Winners announced
3419 participants

Baseline Tooling Hackathon

Online

Accelerate availability of modern web features

$10,000 in prizes
Winners announced
2923 participants

TiDB AgentX Hackathon 2025

Online

Forge Agentic AI for Real-World Impact

$30,500 in prizes
Winners announced
2651 participants

2025 Techinance Cyberhack

Online

Crafting innovative ideas to help combat cybersecurity risks and spread awareness for data privacy and cybersecurity

Non-monetary prizes
Winners announced
130 participants

AWS Lambda Hackathon

Online

Build solutions that scale: power your ideas with AWS Lambda

$15,000 in prizes
Winners announced
3715 participants

Forge Quest: Bonus Level

Online

Sharpen dev skills, build impactful apps, and earn rewards!

Non-monetary prizes
Winners announced
2365 participants

AWS Presents: Breaking Barriers Virtual Challenge

Online

Infuse generative AI with AWS and connectivity to enable equitable digital experiences for all

$16,000 in prizes
Winners announced
2317 participants

Mindfulness Hacks

Online

Fostering Minds, One Line at a time

$250 in prizes
Winners announced
338 participants

Accelerate App Development with GitHub Copilot

Online

Empowering the Next Generation of Developers with GitHub and Azure

$10,000 in prizes
Winners announced
2264 participants

Hackonomics 2024

Online

An experience to help educate and grow insight into Computer Science and Economics.

$1,045 in prizes
Winners announced
321 participants

Google Chrome Built-in AI Challenge

Online

Develop a web application or Chrome Extension that uses one or more Chrome built-in AI APIs to interact with integrated models such as Gemini Nano.

$65,000 in prizes
Winners announced
8494 participants

Lightning Fast AI Hackathon

Online

Build the AI agents of the future by taking advantage of SambaNova’s Lightning Fast Inference Speeds of Today

$10,000 in prizes
Winners announced
566 participants

Pangea Securathon Showdown

Online

Create secure and compliant apps quickly and easily with a few lines of code. What will you build?

$5,000 in prizes
Winners announced
442 participants

Global Gamers Challenge

Online

Build epic Flutter games to assist in the battle to defend the planet!

$103,890 in prizes
Winners announced
3481 participants

GitLab Innovation Pitch Competition

Online

Software. Faster.

$30,000 in prizes
Winners announced
883 participants

Codegeist Unleashed

Online

Can AI fuel the workplace? Find out by building AI apps on Atlassian’s Forge platform. $172,500 in prizes and trips to Amsterdam for the top 3 winners.

$172,500 in prizes
Winners announced
1687 participants

Square Developer Hackathon 2023

Online

Build new apps or app features with emerging technologies with Square

$81,000 in prizes
Winners announced
1298 participants

Pygames

Online

If you love programming and gaming, this is the perfect opportunity to showcase your skills and have some fun!

$13,700 in prizes
Winners announced
1273 participants

Wix Make-A-SaaS Hackathon

Online

Are you ready to ship? Let’s build your dream SaaS product together on Velo by Wix, our full stack platform for creating secure, scalable and reliable web applications.

$27,788 in prizes
Winners announced
1133 participants