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Fiverr Pro
English
$
USD
I will create, solve, and teach ctf challenges in web exploitation and cryptography
Full Stack Developer and Cybersecurity Specialist
I am a Senior Full Stack Developer and Cybersecurity Specialist offering both secure development and penetration testing.
Development: MERN Stack, Next.js, Python Flask with AI integration. All code i...
About this Gig
Stuck on a CTF challenge? Need original challenges built for your event? Want to actually understand the vulnerability not just copy a solution?
I'm a Full Stack Developer and Cybersecurity Specialist who competes in and designs CTF challenges professionally. My background in penetration testing means every challenge I build mirrors real-world attack surfaces, not contrived puzzles that teach nothing outside the competition.
What I offer in this gig:
- Custom CTF challenge design (web exploitation: SQLi, XSS, SSRF, IDOR, broken auth; cryptography: classical ciphers, RSA, hash cracking, encoding)
- Challenge solving with full written walkthroughs step-by-step
- Beginner-friendly guides that teach the vulnerability class, not just the flag
- 1-on-1 coaching sessions where we work through a challenge or concept together live
For organizers: I deliver challenges Docker-ready with flags, hints, and full solution writeups so you can run a polished event without the operational headache. I can also help configure your CTFd or rCTF platform.
Message me before ordering if you have a specific challenge category or difficulty level in mind. I offer custom packages for full CTF events.
My Portfolio
FAQ
Can you solve any CTF challenge I send you?
I specialize in web exploitation and cryptography categories. If you send me a challenge outside these areas I'll tell you upfront rather than waste your time. For web and crypto, I'll provide a full written walkthrough with the solution and a clear explanation of the vulnerability or cipher used.
What information do you need to build a custom challenge?
The category (web or crypto), target difficulty (easy / medium / hard), the intended learning objective (e.g. "teach SSRF to intermediate players"), and whether you need Docker deployment. If you have a theme for your event I can incorporate that too.
How does the 1-on-1 coaching work?
We schedule a session over Google Meet or Discord. You bring a challenge or a vulnerability concept you want to understand, and we work through it together live. I share my screen, explain my thought process, and you can ask questions at every step. Sessions are 60 minutes each.
Are the challenges suitable for beginners?
Yes — I design challenges across all skill levels and always ask about your audience before building. A challenge for a first-year computer science class looks very different from one for a competitive university CTF team. Just tell me who will be playing.
Do you help with CTFd or rCTF platform setup?
Platform setup is included in the Premium package. For Standard orders I can provide a deployment guide. If you just need help getting your platform running without ordering challenges, send me a message and we can work something out.
Reviews
2 reviews for this Gig
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Rating Breakdown
- Seller communication level
- Quality of delivery
- Value of delivery
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Most relevant
A anastaani
Jordan
Very professional
Up to $50
Price
2 days
Duration
Helpful?A a_rehm4n95
United Kingdom
Omar helped so much and delivered exactly why I wanted. Helping me with everything.
Up to $50
Price
5 days
Duration
Helpful?
Reviews
2 reviews for this Gig
| (2) | ||
| (0) | ||
| (0) | ||
| (0) | ||
| (0) |
Rating Breakdown
- Seller communication level
- Quality of delivery
- Value of delivery
Sort By
Most relevant
A anastaani
Jordan
Very professional
Up to $50
Price
2 days
Duration
Helpful?A a_rehm4n95
United Kingdom
Omar helped so much and delivered exactly why I wanted. Helping me with everything.
Up to $50
Price
5 days
Duration
Helpful?
