Penetration Testing Secure Code Review & Fixing

@Microlent

Hello, I understand the critical importance of having a secure and robust codebase for your production-ready site. As an experienced cybersecurity professional specializing in penetration testing and secure code review, I am well-equipped to address the vulnerabilities present in your React JS, Node.js, and MongoDB stack. My approach involves conducting a thorough line-by-line review to identify logic flaws, misconfigurations, and OWASP Top 10 issues. Following this, I will perform active penetration testing to validate the fixes in a real-world scenario and ensure that the codebase is secure under pressure. I have a proven track record of delivering developer-ready remediation, updating code, documenting changes, and providing concise reports that detail each vulnerability, its patch, and retest results. By combining both static analysis tools and manual review techniques, such as Burp Suite and OWASP ZAP, I ensure comprehensive coverage in identifying and fixing security issues. You can view relevant past work in my portfolio, showcasing resolved CVEs and redacted reports. I am ready to sign an NDA and collaborate closely to achieve a bullet-proof solution for user authentication, payment processing, and data storage. Let's discuss further in chat to align on next steps. Sincerely, Rajesh

@OutsourceMan

Hi, CnEL India can perform an authorized secure-code review, penetration testing and remediation for your React, Node.js and MongoDB application. Our methodology: * Review the architecture, authentication, sessions, APIs, database access and security configurations. * Perform targeted secure-code review of critical modules and identify OWASP Top 10 risks, logic flaws, validation issues and access-control weaknesses. * Review authentication, authorization, session management, payment-related flows and sensitive data handling. * Use appropriate security testing tools such as Burp Suite, OWASP ZAP and static-analysis tools, combined with manual validation. * Test API endpoints, input handling, injection risks, IDOR/access-control issues, security headers and common web vulnerabilities within the authorized scope. * Document findings with severity, affected component, evidence, impact and remediation. * Patch identified vulnerabilities directly in the codebase with clear comments where appropriate. * Retest each remediation and verify that fixes do not introduce regressions. * Provide a concise final report mapping vulnerabilities to fixes and retest results. * Follow NDA and agreed testing boundaries throughout the engagement. We can begin with a security scope/codebase review, prioritize critical areas, remediate findings, then perform a final penetration-test cycle before handover.

@naminghn

Hi there, I noticed you're looking for a full secure code review of your React, Node.js, and MongoDB application. I can perform a meticulous examination of your codebase, identifying the vulnerabilities, especially in key areas like user authentication and payment processing. Once I've completed the code review, I will conduct active penetration testing to validate the effectiveness of the patches in a real-world scenario. My approach will ensure that your application's critical components are rendered bulletproof against any potential exploits. I have extensive experience with security auditing and commonly use static analysis tools like Burp Suite, OWASP ZAP, as well as manual code review techniques. I will not only address the vulnerabilities but also provide clear, developer-ready remediation notes that map each patch to its respective vulnerability. If needed, I'm happy to furnish reports of previous similar work. Looking forward to discussing this further and proposing the right technical approach. Regards, Ali

@geologistt

Hello, I can secure your React, Node.js, and MongoDB application and prove the fixes hold. My team and I will review the code, patch it, and then attack it again to confirm it is clean. How we work: Code review: manual, line-by-line review of the critical parts, plus SonarQube for wider coverage. We check for OWASP Top 10 issues, logic flaws, and misconfigurations, especially in input handling and sessions. Focus areas: login and authentication, payment flow, database security (including NoSQL injection), and anything else that can be abused. Penetration testing: Burp Suite and OWASP ZAP combined with manual testing, done after the fixes so we test the real result. Fixes: we update the code ourselves and add clear comments for your developers. Report: one short document that maps each vulnerability to its patch and retest result. Past work: Redacted reports availableupon request. Terms: We sign the NDA before we get repository access. The job is done only when your final retest comes back clean. Can you share the size of the codebase (roughly) and your deadline? I can then give you a fixed price and timeline. Best regards

@onkarkulkarni8

Hello, I checked your "Penetration Testing Secure Code Review & Fixing" project description, it looks like the focus is on delivering a clean, responsive website that works well across all devices. I prefer understanding the expected layout and user experience first, then building pages that closely match the design while keeping the code organized and easy to maintain. Feel free to share the design or current website, and I'll suggest the best implementation along with a realistic timeline. Final timeline and cost will be confirmed in chat after a complete understanding and documentation of the project expectations in detail.

@mninfotech2

With over a decade of experience in the IT field, especially in Mobile App & Web Development, I'm confident that I am the perfect fit for your Penetration Testing Secure Code Review & Fixing project. My team of 35+ expert developers and I specialize in delivering not just solutions but tailored remedies for diverse client needs. We've successfully devised several secure code bases on React.js, Node.js, and MongoDB platforms that have met OWASP top 10 standards. I not only use manual code review strategies but also leverage advanced tools such as Burp Suite, OWASP ZAP, SonarQube, etc. for static analysis to deliver bullet-proof and developer-ready fixations. As a testament to my skills and experience in this niche, I can provide you with both redacted reports of resolved CVEs and links to previous projects- which underline my focus on thoroughness and accountability. Lastly, as your project rightly insists on retesting to validate every elimination of vulnerability, my track record showcases 100% satisfaction at minimum cost. Trust me with your codebase and I assure you impeccable service 'tailormade' for your secure path from input sanitization to session handling! Let's make your app impervious together!

@PINESCRIPTERR

Hi, I can perform a structured security assessment of the React/Node.js/MongoDB codebase, combining manual secure-code review with automated analysis and controlled penetration testing. I’ll focus on authentication and session management, authorization and business-logic flaws, input validation and injection risks, payment flows, sensitive data exposure, MongoDB query security, dependencies, configuration, API endpoints, and OWASP Top 10 issues. I’ll then implement the remediation directly, document each vulnerability and patch, and retest the affected attack paths so acceptance is based on verified results rather than theoretical findings. I can also use tools such as Burp Suite, OWASP ZAP, and static-analysis tooling where appropriate. Question 1: Will the penetration testing be performed against a dedicated staging environment with representative test/payment data, and will production testing be explicitly excluded? Question 2: Which authentication/payment providers and deployment environment are currently used, and do you already have security test accounts and a preferred vulnerability severity/reporting format? Regards, Houssame.

@topcreator100

Hello, Greetings , Good evening! I’ve carefully checked your requirements and really interested in this job. I’m full stack node.js developer working at large-scale apps as a lead developer with U.S. and European teams. I’m offering best quality and highest performance at lowest price. I can complete your project on time and your will experience great satisfaction with me. I’m well versed in React/Redux, Angular JS, Node JS, Ruby on Rails, html/css as well as javascript and jquery. I have rich experienced in Penetration Testing, React.js, MongoDB, JavaScript, Web Security, NoSQL Couch & Mongo, Security Auditing and Node.js. For more information about me, please refer to my portfolios. I’m ready to discuss your project and start immediately. Looking forward to hearing you back and discussing all details.. Eager to hear your feedback

@longngoc2307

Hi, there. "SECURE CODE REVIEW + PENETRATION TESTING" - you need the existing React, Node.js, and MongoDB stack reviewed, hardened, and retested so vulnerabilities are actually fixed rather than just documented. I can perform an authorized secure-code review covering authentication, sessions, authorization, input validation, API security, MongoDB queries, payment flows, secrets, dependencies, configuration, and OWASP Top 10 risks. I would combine automated analysis with manual review and controlled penetration testing using tools such as Burp Suite, OWASP ZAP, and targeted security checks. Findings will be mapped to developer-ready fixes, with retesting evidence and a concise remediation report. I can provide accurate relevant security work examples after reviewing the NDA requirements rather than inventing reports or CVE references. Can you confirm whether testing will be performed against a staging environment or the production system? Looking forward to working with you.

@marjanahmed13

Hi! My name is Marjan and I'm here to offer you my services as a skilled applicant with over a decade of experience working on Freelancer.com. I believe I am the best fit candidate for this project due to my extensive experience; I would like to have a discussion to get to know that we both are on the same page. Once the scope will be locked, I will start working on it right away.

@juanestebana17

Hi , Good morning! I’ve carefully checked your requirements and really interested in this job. I’m full stack node.js developer working at large-scale apps as a lead developer with U.S. and European teams. I’m offering best quality and highest performance at lowest price. I can complete your project on time and your will experience great satisfaction with me. I’m well versed in React/Redux, Angular JS, Node JS, Ruby on Rails, html/css as well as javascript and jquery. I have rich experienced in Web Security, React.js, NoSQL Couch & Mongo, Security Auditing, Node.js, JavaScript, MongoDB and Penetration Testing. For more information about me, please refer to my portfolios. I’m ready to discuss your project and start immediately. Looking forward to hearing you back and discussing all details.. Thanks and Regards

@AZTURK1

Stitched-together codebases across React, Node.js, and MongoDB almost always leak through NoSQL query injection, broken object-level authorization (BOLA), and insecure session or token storage. I will audit your repository line-by-line, fix the vulnerabilities directly in the code, and validate the patches using active dynamic testing. ✅ SAST & manual review targeting NoSQL injection, prototype pollution, CORS/CSRF misconfigurations, and broken authentication logic across Express and Mongoose schemas. ✅ Direct code-level remediation: enforce strict input validation (Zod/Joi), sanitize queries, bind secure httpOnly/SameSite cookie attributes, and add rate-limiting to sensitive endpoints. ✅ Active DAST penetration testing using Burp Suite Pro to simulate real-world attacks against auth and payment flows, backed by a retest verification report. ✅ Safety control: All fixes deployed on an isolated Git branch with full commit history and local test coverage before merging to prevent breaking functional flows. ✅ 10+ years production experience | 400+ completed projects | 320+ five-star reviews ✅ Microsoft® Certified: MCSA | MCSE | MCT & cPanel Certified (CWSA-2) Are you currently storing JWTs in browser localStorage, and are payment gateway webhooks validating cryptographic signatures and timestamps against replay attacks? I can deliver this in 1 day for 135 USD and can jump on it right now.

@shadabkhan92

With a profound experience in full-stack development using React JS, Node.js, and MongoDB, I offer the perfect combination of skill and expertise for your Penetration Testing and Secure Code Review project. I have an established track record of conducting meticulous code reviews, actively identifying logic flaws, rectifying misconfigurations, and most significant: addressing disparaging security vulnerabilities. I perceive security gaps as potential threats to reputation and always ensure comprehensive penetration testing against real-world scenarios post-review. What distinguishes me from other profiles is our ability not just to highlight problems but to instigate real change- something we at MOHD SADAB take very seriously. Acting as an autonomous agent resonates deeply with the agentic AI we build. This mindset combined with my adeptness in using static analysis tools such Burp Suite, OWASP ZAP helps me uncover even the subtlest loopholes missed by traditional review methods. Moreover, working on challenging projects like yours where I would be able to demonstrate my prowess across multiple platforms AWS, GCP, Azure not forgetting my previous work on ERP is what pushes me to deliver exceptional results . Hence I'm confident that choosing me would not only leave your site completely secure but give you the peace of mind that comes with knowing you hired a trusted professional . Let's connect and discuss further details about your project's unique needs!

@sahilcomputers39

Hi, Your site needs more than a scan, secure-code review, hands-on patching, and penetration testing end to end. A production site built by multiple freelancers can easily leave gaps across authentication, session handling, APIs, payments, and MongoDB. I can take the codebase through a secure-code review, identify OWASP Top 10 and business-logic vulnerabilities, patch the issues directly, and validate the fixes through penetration testing. My approach:- - Review React, Node.js, and MongoDB code for insecure input handling, authentication/session weaknesses, authorization flaws, injection risks, data exposure, and configuration issues. - Combine manual code review with Burp Suite, OWASP ZAP, and static analysis where appropriate to identify issues automated scans may miss. - Patch confirmed vulnerabilities directly in the code, document the changes, and provide developer-ready remediation details. - Retest the application after remediation and map each finding to its fix and verification result. I can also provide relevant redacted security reports or examples of previous VAPT work under NDA. Once repository access is available, I can first assess the authentication, payment, and data-handling flows. Would you like the initial review to cover the entire codebase or prioritize these critical areas first? Best Regards, Sahil D.

@developper69

Your production site needs more than a checklist: the React, Node.js, and MongoDB layers require a coordinated review, exploitation cycle, and code-level remediation. I can assess authentication, session handling, input validation, payment flows, data access, configuration, and OWASP Top 10 risks using manual analysis alongside tools such as Burp Suite, OWASP ZAP, and SonarQube where appropriate. Findings will be mapped to specific patches, comments, severity, and retest evidence. I would prioritize abuse paths first, isolate testing from production where possible, and include regression checks so fixes do not weaken existing functionality. NDA-based repository access and your final retest gate fit this workflow well. I can provide clear developer-ready documentation and collaborate through the final verification cycle. Regards, Muhammad

@mehranriaz0

Greetings, I can see that you need a thorough security overhaul of your production-ready site, which has been pieced together by multiple freelancers. It’s crucial to identify and fix vulnerabilities, especially in user authentication, payment processing, and data storage. My approach would involve a meticulous line-by-line review of your React JS, Node.js, and MongoDB code, focusing on potential OWASP Top 10 issues, and then conducting active penetration testing to ensure the fixes hold up against real-world scenarios. I have experience effectively combining static analysis tools with manual reviews, which allows me to pinpoint vulnerabilities accurately. After making the necessary updates, I will provide detailed comments and a concise report mapping each vulnerability to its resolution. One question I have is: Are there any specific areas of the codebase that you are particularly concerned about, or should I treat the entire application as a whole? Best regards, Mehran Riaz

@pinesucceed01

Hello, As a seasoned talent, my impressive 16-year tenure and significant experience in web and software development make me ideal for your project. My knowledge extends across an array of important languages, including those employed in your production-ready site such as React JS, Node JS, and MongoDB. I understand the intricacies of these languages, which will be invaluable for identifying any logic flaws and misconfigurations that might be present. One of my core strengths is my dedication to top-tier security. Through consistently using a combination of both manual review and static analysis tools like Burp Suite, OWASP ZAP, SonarQube (and more), I maintain a rigorous approach to my work. I have carried out comprehensive secure-code reviews and repaired vulnerabilities in countless projects over the years, giving me the confidence to apply these skills to your codebase. Lastly, my commitment to excellence drives me to not merely identify but also fix the issues at hand. I will “update the code myself, comment the changes” as requested and supply you with an extensive report that maps each vulnerability to its respective patch. My aim is not just to find vulnerabilities but to ensure they don't exist post-review and that your code emerges "bullet-proof" in crucial areas like user authentication and payment processing. I look forward to discussing your project further and assuring you through our clean run final test that your se Thanks!

@kishanbwts

Your site’s patchwork code and obvious input flaws create real security risks, especially around authentication and payments. I will comb through your React, Node, and MongoDB code, line by line if needed, to catch logic mistakes, injection points, session weaknesses, and OWASP Top 10 issues that automated tools alone might miss. After patching, I will run active penetration tests to validate each fix under real conditions, not just theory. Every change will be applied directly in the repo with clear comments and matched to a concise report outlining the vulnerability, fix, and test results. In a past project for a fintech startup, I found similar session fixation bugs and payment logic flaws patched through a mix of manual reviews and Burp Suite scans—this process ensured zero vulnerabilities by final retesting. Do you currently use any static analysis or security scans internally? And is CI/CD in place to automate future security checks? Addressing those now can protect your site long term. I’m ready to start reviewing as soon as NDA is signed and access is given, delivering a bullet-proof codebase you can trust.

@pasion0128

★•══•★ Hi client ★•══•★ I recently completed a similar React/Node/MongoDB security audit, fixing authentication, session, injection and data-access vulnerabilities. I’ll combine manual OWASP review with Burp/ZAP testing, patch root causes, then retest each finding and document the evidence clearly. Can you share the codebase size and payment provider used? Best regards, Rico