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The Best Virtual Hackathons You Can Join in 2025 (Part 2, Jul-Dec 2025)

Updated: Jun 30

Following the highly popular post The Best Virtual Hackathons You Can Join in 2025, here comes another update—this time spotlighting four powerful opportunities in the second half of 2025. These virtual hackathons offer more than prizes or prestige—they’re global experiences that connect coders, creators, scientists, and innovators with meaningful challenges and vibrant communities.


Whether you're exploring space, contributing to open source, or scaling an AI model with expert mentors, these events help you grow in all the right directions—and you don’t even have to leave home to do it.


In this post, we spotlight four of the best virtual hackathons to join in late 2025, including key details like how to register, who they’re for, and what makes them worth your time. These aren’t just competitions—they’re opportunities to level up your skills, expand your network, and become part of something much bigger.


🔥 Try it now! Visit The Changing Booth for more digital opportunities to grow, create, and connect.


🎬 Prefer to Watch? Catch the Video Version!

Want a quick, visual rundown of the top virtual hackathons happening from July to December 2025? 🎯 Instead of scrolling, you can watch the full breakdown right here:


This video covers all the same great events, insights, and deadlines featured in the article — perfect for busy creators, coders, and curious learners on the go! ⏱️💡

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💡 Why You Should Join a Hackathon 2025

Hackathons aren’t just for coders or startup founders anymore—they’re for anyone who wants to build, learn, and grow in a fast-paced, collaborative environment. Whether you’re a data nerd, designer, writer, or curious beginner, 2025 is the perfect time to join your first (or next) virtual hackathon.


With global participation, exciting tech themes, and real-world challenges, hackathons help you:

  • 🚀 Gain practical experience in problem-solving, teamwork, and creative thinking

  • 🛠️ Build portfolio-worthy projects that stand out to employers and collaborators

  • 🌎 Connect with mentors and peers from diverse backgrounds, industries, and countries

  • 📚 Learn by doing, with access to free tools, expert guidance, and cutting-edge topics

  • 🎯 Challenge yourself in a short time frame—perfect for boosting confidence and momentum


Whether you're leveling up a resume, preparing for a tech career, or just looking to create something meaningful with others, hackathons offer a powerful path forward.

✨ No matter your background or skill level, there's a place for you at the virtual table in 2025.


🚀 1. NASA Space Apps Challenge – Solve Earth & Space Problems with Open Data

🗓 Event Dates: October 4–5, 2025

📝 Registration Opens: July 17, 2025


Futuristic museum with astronaut suit, space shuttle, and vintage machinery. A computer, keyboard, and mouse are on a desk in the foreground.

The NASA International Space Apps Challenge is the world’s largest global hackathon, empowering coders, storytellers, scientists, designers, and thinkers to solve real-world challenges using open NASA data. From building data visualizations to designing space-inspired apps, the possibilities are as vast as the universe.


Join virtually or at a local event near you and collaborate with NASA subject matter experts, problem solvers, and fellow enthusiasts across every continent.


🌟 Why You Should Join:

  • Create solutions for real-world problems in space, science, and sustainability

  • Collaborate globally with a diverse, mission-driven community

  • Learn from and engage with NASA engineers and researchers


👥 Who Can Join:

  • Open to all ages and experience levels

  • Solo participants or teams welcome

  • Free and available virtually and globally


💡 Whether you're new to STEM or a seasoned techie, this hackathon is a launchpad for big ideas and big impact—right from your laptop.



⚡ 2. NCSA Open Hackathon – Optimize Real Code with Expert Mentors

🗓 Event Dates: August 12–21, 2025

📝 Application Deadline: June 11, 2025


Futuristic data center with glowing servers, a desktop showing intricate graphics, and a high-tech ambiance with vibrant lights.

Hosted by the National Center for Supercomputing Applications (NCSA) in partnership with NVIDIA and OpenACC, the NCSA Open Hackathon is a hands-on, mentor-guided event designed to help scientists and engineers optimize their code and accelerate real-world projects using GPU computing.


Work directly with mentors to scale AI models, improve performance, and access high-performance computing (HPC) resources—all in a supportive, expert environment.


🌟 Why You Should Join:

  • Gain guidance from NVIDIA and HPC mentors

  • Access real GPU infrastructure for AI/ML optimization

  • Leave with a more powerful, scalable version of your project


👥 Who Can Join:

  • Open to global participants (priority for NCSA and NAIRR-affiliated scientists)

  • Teams of 3+ with a codebase and a goal

  • Projects must include a permissive license (e.g., MIT, BSD)


💡 This hackathon is perfect for teams with projects ready to scale and a strong desire to take them to the next level—with expert support and tools that professionals use every day.


👉 Try it now! Apply before June 11


🧑‍💻 3. GitLab Hackathon – Contribute to Open Source, Win Prizes, Build Skills

🗓 Event Dates: July 17–24, 2025


Open office with people on computers. Code on screens. Chalkboards and diagrams on walls. Bright, industrial setting, collaborative mood.

The GitLab Hackathon is a global week-long open source sprint where contributors submit merge requests (MRs) to GitLab repositories—earning badges, leveling up their profiles, and even winning Contributor Store credits.


Whether you’re fixing bugs, submitting docs, translating, or designing UX components, this is your chance to get hands-on experience in a real open-source community and walk away with tangible recognition.


🌟 Why You Should Join:

  • Gain practical experience with GitLab workflows and tools

  • Win Contributor Store credits and GitLab achievement badges

  • Contribute to live open-source projects and grow your portfolio


👥 Who Can Join:

  • Anyone with interest in open-source (beginner to advanced)

  • Developers, writers, designers, and translators welcome

  • Contributions are asynchronous and solo-friendly


💡 Great for freelancers, developers, or students looking to deepen their GitHub/GitLab knowledge and get noticed in open-source communities—plus, you might win prizes along the way.


👉 Try it now! Join the GitLab Hackathon


🧠 4. EuroCC AI Hackathon – Accelerate Your AI Projects with Expert Mentorship

🗓 Event Dates: October 14–23, 2025

📝 Application Deadline: August 5, 2025


People working on laptops in an office, with EU graphics and "Transformative experiences" text. Laptop shows silhouettes under EU stars. Futuristic vibe.

Co-hosted by EuroCC Austria, Germany, and Poland, and supported by NVIDIA, the EuroCC AI Hackathon is a highly focused event designed for teams working on AI, ML, and data-intensive projects. Over four intense days, teams will collaborate with mentors to optimize performance, efficiency, and scalability using cutting-edge GPU tools and libraries.


Participants gain exclusive access to compute resources and a dedicated virtual space to evolve their projects in a hands-on environment.


🌟 Why You Should Join:

  • Collaborate with top mentors in AI and machine learning

  • Access real GPU clusters and cutting-edge infrastructure

  • Improve your AI models and deployment pipelines in real time


👥 Who Can Join:

  • Teams of 3+ located in the EU or EuroCC countries

  • Must submit a project with open-source or clearly licensed code

  • Familiarity with basic GPU programming recommended


💡 Perfect for academic researchers, data scientists, or AI practitioners who want to transform experimental code into optimized, production-ready tools—while learning from the best.


👉 Try it now! Apply by August 5


🌟 Final Thoughts: Hackathons Are More Than Code—They’re Communities

Hackathons are no longer just coding marathons—they’re ecosystems of learning, networking, and purposeful creation. Whether you're advancing science, open-source, AI, or your own personal goals, these virtual events provide the mentorship, infrastructure, and community to take your passion further.


From NASA’s space exploration challenges to GitLab’s badge-winning coding sprints, these events help you:

✅ Build your skills in real-world environments

✅ Meet global peers who share your values

✅ Grow your confidence, your codebase, and your career


💬 No matter your background or location, there’s space for you here.



🎯 Try it now! Visit The Changing Booth for more digital events, challenges, and opportunities to grow online.

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