
Avoin
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I’m bringing a multi-layer system back online—a native PHP-MySQL web backend that drives a Node.js WebSocket service and a client-management console. Before launch, the entire codebase needs a deep security sweep, but the web backend is my first target. I suspect hidden backdoors and unpatched vulnerabilities; I need them located, removed, and the fixes thoroughly documented. There’s no existing audit playbook, so I rely on you to propose and carry out a full methodology that mixes code review, penetration testing, patching, and verification. The environment is classic XAMPP (Apache, PHP, MySQL/MariaDB) with a standalone Node.js layer handling real-time connections, so hands-on experience with that exact stack is essential. Deliverables • A concise audit plan outlining scope, tools, and timeline • Cleaned source with every backdoor removed and all vulnerabilities patched • Fresh deployment on a standard server, fully tested for stability • Final report detailing findings, remediation steps, and hardening recommendations The work is accepted once the redeployed server runs 72 hours without error, WebSocket sessions stay stable, and your security tests return no critical issues. Include your preferred analysis and pen-testing tools plus an estimated timeframe when you respond so we can lock in the schedule and get this platform secure again.
Projektin tunnus (ID): 40202962
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20 freelancerit tarjoavat keskimäärin $42 SGD tätä projektia

Hi, I have 10 years of experience and knowledge as system administrator setup and management of different Linux Web Hosting Servers, AWS servers,Cloud Servers, GPU Servers, Server Monitoring, Server Security, Server Optimisation, Mailing Servers, Email Marketing, SSL, DNS, Apache, Nginx, etc with Cpanel, Plesk, Virtualmin or other panels. Services such as cPanel/WHM, Plesk, Virtualmin LAMP Stack, Tomcat, MySQL/MariaDB, Zimbra, Postfix mail server, Mailenable, smarter mail, MS SQL,AWS , etc. Please discuss to start. Thank you
$40 SGD 1 päivässä
7,6
7,6

Hi, I have hands-on experience securing PHP–MySQL applications on XAMPP and Node.js WebSocket services. I can perform a full security audit starting with the PHP backend reviewing code for backdoors, running penetration tests, patching vulnerabilities, and verifying fixes. I’ll propose a clear audit methodology, clean and redeploy the system on a fresh server, and document all findings and remediation steps. I use a mix of manual code review, automated scanners, and targeted pen-testing to ensure no critical issues remain. I can share the tools I’ll use and a realistic timeline upfront so we can lock this down properly and get your platform stable and secure again.
$50 SGD 3 päivässä
7,0
7,0

Having proficiently worked in the industry for over 9+ years, I've fine-tuned my skills in web development and especially in piles of dealing with MySQL, Node.js, and PHP like your project demands. My team is driven by an unwavering commitment to deliver IT services that turn ideas into reality just like you aspire. Specifically, I'd like to point out my background in E-commerce and CMS website development which would furnish me with intuitive insights on web backends similar to what we're needing here. My expertise in conducting thorough code reviews, penetration tests and addressing security vulnerabilities would be instrumental in identifying and resolving the hidden backdoors and unpatched vulnerabilities you suspect. In addition, my team promises concise auditing methodology proposals peppered with necessary patching and thorough documentation of all fixes made. We aim to ensure a clean source code for you after sweeping away all potential risks along with submission of a final comprehensive report for your future reference on findings, remediation measures and hardening recommendations. So yes, we would be honored to leverage our skills and experience ensuring your platform not only gets secure but operates efficiently without any hiccups after the redeployment. Looking forward to serving you!
$210 SGD 7 päivässä
5,4
5,4

Hello googlec1, I came across your project Secure & Redeploy PHP Backend and I am very interested in working with you. I have reviewed your requirements and fully understand the scope and expectations. I specialize in PHP, Linux, Web Security, MySQL, Node.js, MariaDB, Penetration Testing, Documentation and have successfully delivered similar projects before. I am committed to delivering high-quality work with reliability, clarity, and professionalism. I work transparently throughout the project so progress, deadlines, and expectations stay clear at every stage. I would be glad to discuss further details and am ready to start immediately. Looking forward to hearing from you. Regards, Anum
$120 SGD 3 päivässä
4,5
4,5

As a seasoned Full Stack Web Developer with a specialization in MySQL, Node.js, and PHP, I have been successfully deploying secure and scalable digital solutions for over 10 years, completing over 2000+ projects to date. My work within similar environments using XAMPP and Apache has refined my skills and proficiency in precisely the stack you require - Apache, PHP, MySQL/MariaDB, and Node.js. My expertise doesn't just lie in delivering performant code; it extends to securing it against potential vulnerabilities as well. I'm adept at reviewing codes in search of backdoors and unpatched vulnerabilities, followed by thoroughly addressing them. With no existing audit playbook available for your project, my rich experience will allow me to propose a comprehensive methodology that entails code review, penetration testing, patching, and meticulous verification. Crafting detailed deliverables is my mantra for ensuring satisfaction from my clients' perspective. For your project, I'll provide a concise audit plan outlining the scope of work along with a meticulously managed timeline using preferred analysis tools such as Kali Linux, OWASP ZAP, Burp Suite etc. Drawing from industry best practices and my own keen eye for detail, I will ensure an unhindered functioning experience by the end of the project.
$25 SGD 5 päivässä
4,9
4,9

Hello, I can handle a full security audit and cleanup of your PHP–MySQL backend and its Node.js WebSocket layer. I’ll define a clear methodology covering source review, penetration testing, backdoor removal, patching, redeployment, and verification. Tools manual code review, OWASP checks, Burp Suite, Nikto, SQLMap, custom scripts You’ll receive a cleaned codebase, hardened deployment, and a concise final report with findings and recommendations. Best regards, Rishi Jain
$19 SGD 1 päivässä
4,0
4,0

TRY A FREE DEMO WITH ME BEFORE PLACING THE PROJECT This sounds like a system that works functionally but can’t be trusted until you know exactly what’s inside it — and that’s the real risk before relaunch. Hidden backdoors, legacy PHP patterns, and an old XAMPP stack are exactly where critical issues tend to hide. I can take a security first approach on your PHP MySQL backend before touching anything else. I’ll review the code line by line, look for injected backdoors, unsafe includes, weak auth, SQL injection points, file upload issues, and anything that could later compromise your Node WebSocket layer. Then I’ll patch, harden, and verify instead of just “fixing and hoping”. You’ll get a clear audit plan up front, a cleaned and redeployed system, and a report you can actually understand and keep for future maintenance. The goal is simple: after this, you should feel confident leaving the server running without watching it every hour. I’ve worked hands on with PHP Apache MySQL stacks and Node WebSocket services where security and uptime actually matter, not checklist audits.
$21 SGD 7 päivässä
3,1
3,1

With my extensive PHP, MySQL, and Node.js knowledge, combined with my 8+ years of Full-Stack Engineering experience, I’m confident I can effectively secure and redeploy your backend system. Throughout my career, I’ve dealt with complex projects involving cloud architecture, CI/CD, and containerization - all skills that will be invaluable in securing your multi-layered environment. Furthermore, my proficiency in popular security practices like code review, penetration testing and hardening will ensure every inch of your system is thoroughly checked and fortified. Having hands-on experience in the same stack as yours - XAMPP, Apache, PHP, MySQL/MariaDB and Node.js - gives me a real advantage in helping you strengthen your infrastructure. This means less time spent on the learning curve and more time invested in delivering quality results within the estimated timeframe. Additionally, my background in technical support has amplified my attention to detail; bolstering the probability of locating hidden backdoors and unrevealed vulnerabilities. In conclusion, if you choose to work with me, you’ll not only get a solid team player who excels in clear communication but also a professional dedicated to delivering efficient solutions without compromising quality. Let's seize this opportunity to bring your PHP backend back to life securely and take your platform to new heights!
$21 SGD 7 päivässä
1,0
1,0

Hello, With over a decade of experience in full-stack web and mobile app development, including key elements like PHP and MySQL—the core components of your project's backend—I can bring the necessary skills to secure and redeploy your system. I thrive on challenges that call for plans tailored to the unique characteristics of a given project, just like yours. Through my 100% job success rate, I've proven my ability to devise effective strategies without existing playbooks. In addition, my familiarity with Apache, PHP, MySQL/MariaDB-based XAMPP environment— augmented by a standalone Node.js layer—provides me with a comprehensive understanding of your codebase and architecture. This means I can deliver robust results reliably in line with your timeframe. My extensive exposure to web security gives me an edge in locating hidden backdoors and unpatched vulnerabilities. Lastly, my expertise doesn't end at pure security concerns; it extends to delivering stable and reliable deployment as well as comprehensive documentation—a crucial element for your project. My communication skills are impeccable which allows me to translate complex findings into actionable steps ensuring seamless coordination between us. Given my rich skillset and dedicated approach-hovering around accuracy (98-100%), I would be honoured to be chosen for the task of giving your system the secure reboot it needs. Thanks!
$12 SGD 4 päivässä
0,0
0,0

New freelancer. Experienced developer. Fully committed to your success. I’m building my reputation, which means I care more about quality and satisfaction than the paycheck, giving you dedicated effort, clear communication, and excellent results at a competitive rate. I'm also offering 6 months of free maintenance!!! As an experienced developer, my main focus is on creating effective, secure web solutions. My expertise extends to your exact technology stack, having worked extensively with Apache, PHP, MySQL/MariaDB and Node.js. Your project aligns perfectly with my skillset and I’m excited about the opportunity to perform a thorough security sweep of your PHP backend. Given your description and lack of existing audit playbook, I will propose and execute a comprehensive security plan tailored specifically for your system. My code review and penetration testing methodology will be guided by meticulous attention to detail. Once I identify any hidden backdoors or unpatched vulnerabilities, I'll ensure they are completely removed from the source code while documenting the fixes accurately.
$21 SGD 7 päivässä
0,0
0,0

I’d like to understand the approximate size of the PHP codebase, whether you have any known incident history, and if the Node.js WebSocket layer is exposed publicly or behind the same server. I can perform a full security audit and cleanup of your PHP–MySQL backend, followed by verification of its interaction with the Node.js WebSocket service. The approach will combine manual code review, vulnerability scanning, targeted penetration testing, patching, and post-fix validation, tailored specifically for a XAMPP (Apache/PHP/MySQL) + Node.js stack. I’ll identify and remove hidden backdoors, insecure includes, outdated libraries, injection vectors, auth/session flaws, and misconfigurations, then harden the system with best practices (input validation, prepared statements, session security, permissions, and server-level protections). All fixes will be documented clearly so nothing is a black box. Once cleaned, I’ll handle a fresh deployment, test backend stability and WebSocket session reliability, and monitor for errors. You’ll receive a final security report detailing findings, remediation steps, tools used, and recommendations for ongoing hardening. PHP security audits, XAMPP hardening, MySQL/MariaDB security, Node.js WebSocket services, penetration testing, server redeployment, OWASP Top 10 remediation. I can share my preferred tools and a realistic timeline immediately and start as soon as access is provided. Best Regards, Ankit
$30 SGD 7 päivässä
0,0
0,0

I can deliver this project end-to-end with strong experience in both development and deployment. I have hands-on experience handling complete website security fixes, performance improvements, and production deployments. I’m a results-driven Lead Engineer with 13+ years of experience in enterprise application development, backend systems, and cloud architecture. I’ve designed and delivered scalable, production-ready solutions for healthcare and media platforms. My expertise includes PHP 8 backend development, AWS serverless architecture, and secure application design. I focus on clean code, system stability, and on-time delivery. I’m confident I can deliver high-quality results for this project.
$21 SGD 7 päivässä
0,0
0,0

I have gone through your proposal and, as an ISO 27001:2022 Lea Auditor and security practitioner, I can help you bring this multi-layer PHP-MySQL backend and Node.js WebSocket system back online with a clear, standards-aligned, security-first approach. 1. Audit planning and scoping 2. Architecture and environment review 3. Deep PHP code and config review 4. Database and access hardening 5. Penetration testing 6. Backdoor removal and patching 7. WebSocket and Node.js layer hardening 8. Clean redeployment 9. 72-hour stability and security verification 10. Final security and hardening report This way you are not only getting the current platform cleaned and redeployed, but also a methodical, ISO 27001-informed security baseline that reduces future risk and makes future audits and maintenance much easier.
$30 SGD 7 päivässä
0,0
0,0

Hi, I can perform a full security audit of your PHP-MySQL backend, remove hidden backdoors, patch SQLi, XSS, and CSRF vulnerabilities, and redeploy on a fresh server. My approach combines targeted code review, penetration testing with tools like Burp Suite and OWASP ZAP, and verification to ensure stability of both the backend and Node.js WebSocket layer. Deliverables include cleaned source code, redeployment, and a final report with remediation steps and hardening recommendations. I’ll prioritize high-risk areas first to minimize disruption and ensure the system runs 72 hours error-free. Which modules or endpoints should I focus on first for the initial audit?
$21 SGD 3 päivässä
0,0
0,0

Singapore, China
Liittynyt toukok. 30, 2025
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