DEV Community: Sebastian

From idea to runnable code challenge in minutes

Sebastian — Tue, 31 Mar 2026 16:15:14 +0000

Creating a good coding challenge takes hours.

Problem statement. Tests. Reference solution. It adds up fast.

So we built an MCP integration for DojoCode that cuts this down to minutes.

I wrote about how it works here.

Thanks to the devs who tested it and shared honest feedback 🙌
More updates coming as others try it.

Coding Challenges Built Around Real-World Problems

Sebastian — Tue, 24 Mar 2026 20:53:44 +0000

Most coding challenge platforms are algorithm-heavy. That's not a bad thing — but after working on real projects, the problems that actually slow you down tend to look different.

Debugging code you didn't write. Integrating an API that doesn't behave. Refactoring a function that works but nobody wants to touch. Handling async flows that break in weird ways.

We built a free collection of challenges around exactly those scenarios as part of DojoCode, and published the full list as an open repo:

🔗 https://github.com/dojo-coder/free-code-challenges

Each challenge links to an interactive version you can solve in the browser — no setup, no install, just code.

What's included:

Automation
API integration
Caching
Refactoring
UI Accessibility
Async behavior & system simulations
Algorithms & data structures
and others more

Every challenge includes tests so you can validate your solution before moving on. Good luck and happy coding!

Brave Enough for Legacy Code?

Sebastian — Tue, 10 Feb 2026 19:31:21 +0000

Legacy code doesn’t have to be a horror story.
From Feb 11–16, 2026, we’re turning messy, dusty code into a full-on challenge arena.

Jump into Legacy Love and prove you can refactor, reason, and rescue code that’s seen things.
No tutorials. No hand-holding. Just real-world problems and clean solutions.

Are you ready to put your coding skills to the test? Accept challenge and make this a contest to remember!

How does it work?

The contest spans 5 days, but it doesn't require continuous effort. You can start and complete the 3 challenges whenever you have time. We estimate that solving all the challenges will take approximately 3h of work in total.

Once you register, you’ll receive an email notification before the contest begins. When it starts, you can use your terminal to launch challenges with the command start-challenge. After starting a challenge, the timer activates, and you can open the challenge in your browser to solve it.

Rules

You can check our coding contest rules here.
You can also find step-by-step guides in our documentation to help you familiarize with the DojoCode platform.

mcp

Sebastian — Wed, 12 Nov 2025 19:28:30 +0000

Hacker Games contest for beginners in cybersecurity

Sebastian — Sun, 14 Sep 2025 18:45:09 +0000

Are you a beginner passionate about cybersecurity? Put your skills to the test in our Hacker Games contest, running from September 21 to 25, 2025!

Are you ready to put your coding skills to the test? Accept challenge and make this a contest to remember!

How does it work?

The contest spans 4 days, but it doesn't require continuous effort. You can start and complete the 3 challenges whenever you have time. We estimate that solving all the challenges will take approximately 3h of work in total.

Rules

You can check our coding contest rules here.
You can also find step-by-step guides in our documentation to help you familiarize with the DojoCode platform.

Code the Waves: Summer Vibes Online Contest

Sebastian — Sat, 06 Sep 2025 15:25:32 +0000

Do you like solving code challenges? Put your skills to the test in our Summer Vibes contest, running from September 12 to 15, 2025!

Show off your creativity and code something awesome!
Are you ready to put your skills to the test? Register and make this a contest to remember!

How does it work?

The contest spans 3 days, but it doesn't require continuous effort. Participants can start and complete the 3 challenges whenever they have time. We estimate that solving all the challenges will take approximately 3h of work in total.

Rules

You can check our coding contest rules here.
You can also find step-by-step guides in our documentation to help you familiarize with the DojoCode platform.

Join our React Riddles Online Coding Contest

Sebastian — Thu, 13 Mar 2025 20:28:16 +0000

Think you're a React.js pro? Love solving coding puzzles? Put your JavaScript and React skills to the test in our React Riddles contest from March 20 to 27, 2025! Solve challenges, win epic prizes, and prove you're a true React master!

Are you ready to put your React skills to the test? Register and make this a contest to remember!

Prizes for the top 3 winners

Tickets to the legendary UNTOLD festival!
Fresh, energizing goodies from Mica Ilinca to keep you going!
Exclusive DojoCode T-shirt + stickers
DojoCoins to redeem cool perks in our online shop!

How does it work?

The contest runs for 7 days, but you can complete the 4 challenges at your own pace — no need to be online the whole time. Each challenge takes about an hour, so in total, you’ll only need around 4 hours to complete everything!

Rules

You can check our coding contest rules here.
You can also find step-by-step guides in our documentation to help you familiarize with the DojoCode platform.

Do you like solving bugs in production?

Sebastian — Tue, 28 Jan 2025 07:41:42 +0000

Are you up for a bug hunt? Show off your skills in the Code Firefighters contest, running from January 31 to February 5, 2025!

Show off your problem-solving skills, tackle urgent bugs, and compete to win exclusive DojoCode prizes!

🔥 Prizes for the Top 3 Winners 🔥

A super tasty juice box from our delicious sponsor URBAN MONKEY
A one-day pass for gamers at THE GUILD HALL in Cluj (we hope you can make it!)
Exclusive DojoCode merchandise: T-shirt, stickers, and DojoCoins

Whether you're here to learn, level up, or just have fun, join us and make it a contest to remember! Join us today!

How does it work?

The challenges are built in JavaScript. The contest spans 5 days, but it doesn't require continuous effort. Participants can start the 4 challenges whenever they have time. We estimate that solving all the challenges will take approximately 5h of total work.

Once you register, you’ll receive an email notification before the contest begins. When it starts, you can use your terminal to launch challenges with the command start-challenge. After starting a challenge, the timer activates, and you can open the challenge in your browser to solve it.

Online Contest Game Gurus: Build web mini-games

Sebastian — Sat, 16 Nov 2024 10:29:49 +0000

Love building mini-games with Typescript? Put your skills to the test in our Game Gurus contest, running from November 21 to 30, 2024!

Show off your creativity, code something awesome, and compete for a chance to win a 300 RON YUME Coffee voucher and exclusive DojoCoins!

Whether you're here to learn, level up, or just have fun, join us and make it a contest to remember!

How does it work?

The contest spans 9 days, but it doesn't require continuous effort. Participants can start and complete the 3 challenges whenever they have time. We estimate that solving all the challenges will take approximately 16h of work in total.

Solving a DojoCode challenge in freefall

Sebastian — Thu, 07 Nov 2024 22:42:12 +0000

What happens when you take coding to 10,000 feet? We teamed up with Skydive Transilvania to find out—they took on a DojoCode challenge from 3,000 meters up! 💻✈️ We prepared the challenge and laptop, and they braved the freefall — check out the results!

If he could solve the challenge in freefall, what’s your excuse? Dive into DojoCode and see if you can handle the pressure (no parachute required)!

P.S. For any adventurers near Cluj, Romania, check out Skydive Transilvania for your own skydive experience!

A Coding Adventure Awaits!

Sebastian — Sat, 19 Oct 2024 20:31:07 +0000

Are you a Vue.js enthusiast looking for a fun way to put your skills to the test? Look no further! The Vue Odyssey online contest is here to take you on an interplanetary coding adventure, where you’ll tackle a series of exciting challenges inspired by a Mars rover mission.

Whether you're new to Vue.js or just looking for a fresh challenge, Vue Odyssey is the perfect opportunity to learn and grow.

What Is Vue Odyssey?

In Vue Odyssey, you’ll take on three beginner-level challenges. These challenges are carefully designed to help you strengthen your Vue.js fundamentals without overwhelming complexity. You’ll encounter fun, Mars-related scenarios that will test your problem-solving and front-end development skills, all while enjoying a space exploration theme.

No prior experience with advanced Vue.js concepts is necessary—this contest is built to be accessible for those who are starting their journey in Vue.js or looking to solidify the basics.

Why Participate in Vue Odyssey?

Fun and Immersive: Each challenge follows a Mars exploration theme, making the coding experience both engaging and educational.

Perfect for Beginners: If you're new to Vue.js or just want to brush up on the basics, these challenges are a great way to practice key concepts in an exciting context.

Earn DojoCoins: Compete and earn DojoCoins that can be redeemed on the DojoCode platform for exclusive features and in-app products.

How to Join

It's simple to get started:

Sign Up: Head over to DojoCode and register for the contest. Registration is open until the 25th October 10:00 UTC.

Complete Challenges: All challenges are accessible as soon as the contest starts, and you can tackle them at your own pace.

Submit Your Solutions: Once you’ve written your code, submit it and track your progress on the leaderboard.

If you’re ready for a coding adventure that’s both fun and educational, join Vue Odyssey today! This is your chance to build your Vue.js skills in an exciting, beginner-friendly environment.

👉 Sign up now on DojoCode!

We can’t wait to see how you tackle these Mars-themed challenges. Good luck, and enjoy the journey to the red planet!