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Fiverr Pro
English
$
USD
I will fix website bugs and security vulnerabilities like xss, csrf and sql injection
Sentinel O.
About this gig
>>> Your website is only as strong as its weakest security gap.
Even a small vulnerability can let attackers:
- Steal user or customer data
- Inject malicious scripts into your pages
- Deface your website
- Compromise your database
I'm a CEH & CompTIA Security+ certified developer who fixes both everyday bugs
and serious security vulnerabilities so your site works AND holds up under attack.
WHAT I FIX:
- XSS (Cross-Site Scripting)
- CSRF attacks
- SQL Injection vulnerabilities
- Broken authentication & session issues
- Insecure APIs
- Missing security headers
- Exposed sensitive data
- General bugs & broken functionality
WHAT YOU GET:
- Full security audit of your application
- Detailed vulnerability report (with severity ratings)
- Issues fixed directly in your codebase
- Secure authentication improvements
- Best-practice recommendations to prevent future issues
Whether it's a small bug or a critical security hole, I'll find it and fix it properly
not just patch the symptom.
Message me with your issue before ordering so I can scope it accurately.
Respect third-party rights
Please be aware that it is against Fiverr's policies for sellers to include themes, templates, or any other elements that infringe third-party rights or applicable laws in the delivered work. Read more about in our Guide to Responsible Digital Creation.
Get to know Sentinel O.
Sentinel O.
Full Stack Developer and Security Engineer
- FromNigeria
- Member sinceJun 2026
- Avg. response time1 hour
- Last delivery1 week
Languages
English, French, Spanish, Dutch, German
I am a Full Stack Web Developer with strong expertise in Cybersecurity, helping businesses, startups, and individuals create modern web applications that are not only beautiful but also protected against real-world threats.
>> OFFERS
- Web Development
Responsive and modern website
Landing pages, portfolio, E-commerce websites
API integration & development
Performance optimization
HTML, CSS, JavaScript, React, Next.js, Vue.js, Framer Motion, Three.js
-- CYBERSECURITY SERVICES
Website security audit
Fixing security issues (XSS, CSRF, SQL Injection, ...)
API security
Code review for security.
My Portfolio
FAQ
Can you guarantee my website will be 100% secure?
Security is never “100% guaranteed” because new vulnerabilities can appear over time. However, I will remove known vulnerabilities, harden your system, and significantly reduce attack risks using industry best practices.
Do you remove malware or hacked files?
Yes — in the Premium package, I can clean infected files, remove malicious scripts, and restore your website integrity.
Will you improve my website performance too?
Yes, in addition to security fixes, I may also: Optimize backend performance Improve API response security Clean unnecessary vulnerable code
Will I get a report after the work?
Yes. You will receive a summary report of vulnerabilities found and fixed, plus recommendations for future protection.
What security issues can you fix?
I can fix: XSS (Cross-Site Scripting) SQL Injection CSRF attacks Broken authentication Insecure APIs Exposed sensitive data Weak security configurations
