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I need a specialist to apply a security patch to an existing piece of application software—specifically, a mobile app that is already live in the stores. The task is straight-forward: locate the current vulnerabilities, patch them, and return a clean, fully tested build.
Project ID: 40545383
141 proposals
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Active 2 days ago
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141 freelancers are bidding on average $465 USD for this job

Hi, Please share more details about the application and the vulnerability report so I can review the issues. I will fix the vulnerabilities, update the app, and deploy the new version to the app stores. Let’s connect Best regards
$500 USD in 10 days
8.9
8.9

Hi — Elias here from Miami. I understand you need a security patch applied to an existing mobile application. Ensuring the security of your app is critical, especially given the increasing threat landscape. What usually matters most here is identifying vulnerabilities and ensuring stable integration of the patch without disrupting current functionalities. A common issue in systems like this is maintaining user experience while implementing security measures. The tricky part is usually ensuring that the patch does not introduce new issues or regressions. My approach would involve a thorough assessment of the existing codebase and a step-by-step integration of the patch, followed by comprehensive testing to verify that all functionalities remain intact. I focus on maintainability and future-proofing to prevent future vulnerabilities. I have worked on similar security enhancements for mobile applications, ensuring both security and user experience are prioritized. A few questions to better understand the scope: Q1 – What specific vulnerabilities are you looking to address with the patch? Q2 – Are there any existing user roles or permissions that need to be considered during the implementation? Q3 – How do you currently handle testing and QA for your application? Happy to go through the details and suggest the best technical approach. Looking forward to hearing from you.
$500 USD in 3 days
8.3
8.3

**LET'S SECURE YOUR MOBILE APP WITH A RELIABLE, PRODUCTION-READY SECURITY UPDATE.** With 12+ years of experience in mobile application development and security, I can quickly identify vulnerabilities, apply the required security patches, and ensure your live app remains stable and compliant. I'll review the existing codebase, fix security issues, strengthen authentication, API communication, data storage, and dependency vulnerabilities, perform thorough testing to prevent regressions, and deliver a clean, release-ready build for both Android/iOS (as applicable). You'll also receive a brief report outlining the fixes applied and recommendations for future security improvements. I've successfully maintained and secured production mobile applications with minimal downtime. Let's discuss your app, review the current vulnerabilities, and get your patched version ready for deployment. Thansk Christian
$300 USD in 7 days
8.4
8.4

I specialize in enhancing mobile app security to ensure your application is safeguarded against potential threats. With my expertise, your live mobile app will receive the necessary security patch to address vulnerabilities, resulting in a clean and fully tested build. Understanding the critical nature of the task, I will meticulously locate and patch the current vulnerabilities within your mobile app. By focusing on security enhancements, I aim to provide you with a robust solution that prioritizes the protection of your users and data. My skills in mobile app security, software testing, and vulnerability remediation equip me to handle this project effectively. You can trust my commitment to transparency, responsiveness, and delivering on promises to ensure the long-term success of your mobile application. Regards, InterconnectBPO
$550 USD in 7 days
6.8
6.8

Hi, this looks like a live mobile remediation task where the important part is not just patching the issue, but making sure the fix does not introduce regressions in the store build. The real engineering risk is incomplete vulnerability triage, where one visible issue gets patched but adjacent exposure in the same code path remains. I’ve worked on production systems where the job starts with an existing codebase, limited context, and a need to return a clean, testable result. I usually structure this as targeted investigation first, then isolated remediation, then validation against the exact flows touched by the patch. The closest relevant work here is Custom Feature Development & Integration, where I stepped into an existing product, reviewed the codebase, implemented changes cleanly, and backed them with testing. Python Bug Localization Using Transformer Models is also relevant from a fault-isolation and verification standpoint. For a job like this, I’d review the affected areas, separate root-cause fixes from hardening changes, and verify the patched build against the sensitive paths most likely to regress. On mobile work, that usually means being disciplined about what changed, what was retested, and what still needs explicit validation before release. If useful, I can start by mapping the likely exposure points and defining a concise patch-validation checklist for the current store build. Thanks, Hercules
$500 USD in 7 days
6.7
6.7

Hello, I am an experienced Mobile Application Developer with a strong background in maintaining, optimizing, and securing production applications. I specialize in identifying security vulnerabilities, implementing reliable fixes, and delivering thoroughly tested, production-ready builds while preserving application stability and performance. Please share: The app source code (Android/iOS) Any vulnerability reports or security scan results I'm ready to begin immediately and ensure your application is secure, stable, and fully tested. Best regards, Zero IT Solution
$1,000 USD in 30 days
6.9
6.9

Hi There!!! ★★★★ (Comprehensive mobile app security audit, vulnerability patching, and fully tested release build.) ★★★★ I've read your project and understand you need a security specialist to identify vulnerabilities in your live mobile application, apply the necessary patches, and deliver a stable, thoroughly tested build ready for deployment. The focus is on security, reliability, and ensuring no existing functionality is affected. ⚜ Security vulnerability assessment ⚜ Penetration testing & risk analysis ⚜ Android & iOS security patching ⚜ QA testing after fixes ⚜ Performance & stability verification ⚜ Clean release build preparation ⚜ Deployment support if required I have experience securing Android and iOS applications by identifying security flaws, fixing vulnerabilities, and validating every update through detailed testing. My approach is to first audit the app, prioritise critical issues, implement secure fixes, and perform regression testing to ensure everything works smoothly. I'd be happy to discuss your app architecture and begin the security review right away. Warm Regards, Farhin B.
$256 USD in 10 days
6.6
6.6

Hi, I have extensive experience in mobile app security and have successfully applied patches to both iOS and Android applications. I understand the importance of identifying vulnerabilities through thorough testing and implementing robust fixes that ensure the app remains secure and compliant with store guidelines. I will perform a comprehensive security review, locate existing vulnerabilities, and deliver a fully tested, patched version ready for release. I pay close attention to detail and ensure minimal disruption to your current user base. My approach includes using industry-standard tools and best practices to keep your app safe from common threats. I am confident I can deliver a clean, secure update within your budget and timeline. Best, Justin
$500 USD in 7 days
6.2
6.2

Hi, ★★★ Python Expert ★★★ 4+ Years of Experience ★★★ I can help you with applying the security patch to your mobile app. I will start by analyzing the current vulnerabilities in the application. Once identified, I will apply the necessary patches to ensure the app is secure. After that, I will conduct thorough testing to confirm that the build is clean and functioning properly. The bid is preliminary and can be finalized after clarifying a few details to ensure we're fully aligned on the project. 1. What specific vulnerabilities have been identified so far? 2. Are there any particular testing requirements you have in mind? 3. Do you have a preferred method for delivering the patched build? Ready to get started!
$250 USD in 1 day
6.0
6.0

Hey, the tag mix of Xcode, Android, and Penetration Testing together tells me this isn't just swapping a library version — you've likely got platform-specific issues on both sides, maybe hardcoded secrets or an outdated TLS config that a store review flagged. I'd start with a static analysis pass on both codebases before touching anything, so the patch targets real attack surfaces and not just surface noise. The tricky part is usually reproducing the vulnerability in a test build without triggering app store policy during the process, and that's a dance I've done before. Is the vulnerability something you've already identified, or do you need the audit and the fix both?
$250 USD in 6 days
5.7
5.7

Since the app is already live, my first step would be identifying exactly where the vulnerabilities exist rather than applying generic fixes. I’d review the current iOS and Android builds, inspect API communication, authentication flows, local data storage, permissions, third-party SDKs, and any recent changes that may have introduced the issue. Once the findings are confirmed, I’d patch the affected areas, verify that the fixes don’t create regressions, and then run a full round of functional and security-focused testing before generating release builds. I’ve worked on production mobile applications where security updates had to be applied without disrupting existing users, so I’m careful about compatibility, store compliance, and preserving current functionality while closing the vulnerability. One thing I typically do after patching is add validation checks around the affected components to reduce the chance of the same issue resurfacing in future releases. Can you share whether the vulnerabilities have already been identified, or would you like a full assessment first? Also, is the app built natively or with a framework such as React Native or Flutter? Ready to start as soon as I can review the project.
$500 USD in 7 days
5.8
5.8

I can quickly locate and fix the security vulnerabilities in your live mobile app. In a past project for a retail app, I identified weak points in the authentication flow and patched them without downtime, delivering a fully tested build on time. To get started, could you share any recent security reports or logs you’ve gathered? Also, do you prefer the patch to follow your existing code style and version control process? This type of targeted security update is usually straightforward and can be done promptly once I have access. I’ll focus on thorough testing to ensure nothing breaks after the fix. Ready to start as soon as you provide the details and access.
$750 USD in 7 days
5.4
5.4

Hello There! I’m Md Toriqul Islam, and I’m excited to partner with you & I can dive into your project immediately. I’m an experienced mobile application developer and security specialist with expertise in Android, iOS, penetration testing, and application hardening. I understand you need to identify vulnerabilities in an existing live mobile application, apply the necessary security patches, and deliver a clean, fully tested build ready for deployment. I have rich experience in mobile security assessments, vulnerability remediation, secure coding practices, penetration testing, and QA validation. I am skilled in analyzing security issues, patching weaknesses, performing regression testing, and ensuring application stability after updates. I can audit the current application, implement security fixes, conduct thorough testing, and provide a verified build with documentation outlining the vulnerabilities addressed and the remediation steps taken. I’m ready to start immediately and would be happy to discuss your app architecture and security requirements. Looking forward to hearing from you. Best regards, Md Toriqul Islam
$250 USD in 6 days
5.4
5.4

✋ Hi There!!! ✋ THE GOAL OF THE PROJECT:- IDENTIFY AND PATCH SECURITY VULNERABILITIES IN AN EXISTING LIVE MOBILE APPLICATION AND DELIVER A FULLY TESTED SECURE BUILD FOR BOTH IOS AND ANDROID. I have carefully read your complete requirement and understand you need a focused security audit, vulnerability fix, and stable rebuild of your live mobile app. I am the best fit for this project because I specialize in mobile app security, penetration testing, and production level debugging for Android and iOS applications. I will ensure: 1. Full vulnerability analysis and identification of security risks in the current app build 2. Secure patch implementation following best practices for mobile app security 3. Complete QA testing with clean, stable, and store ready build delivery I will provide tested builds, security improvements, and documentation of fixes applied to ensure long term stability. I have 9+ years experience as a full stack developer and have worked on multiple mobile app security and performance optimization projects. Looking forward to chat with you for make a deal Best Regards Elisha Mariam
$251 USD in 7 days
5.4
5.4

Hello, You need to secure your existing mobile application by identifying and fixing vulnerabilities, and I can deliver this with my 9+ years of experience in mobile app development and application security. I specialize in auditing live applications, patching security flaws, and delivering stable, production-ready builds without affecting existing functionality. I eagerly await your positive response. Thanks
$250 USD in 7 days
5.6
5.6

Hello Sir, I would like to know more in detail about your Mobile App Security Patch. I have experience in iOS apps. Please open chat for detailed discussion so we can move forward. we have expertise in software development, website, and app development, AI Automation, chatbots. We have 9+ years of experience in software, web, and app development. We have done many websites and apps before. We are experts in native app development, hybrid (Cross-platform) app development, web app and website development. We will provide complete solution design, development, testing, and support/maintenance. ?️Technology expertise in flutter and dart, java, Kotlin, PHP, XCode, swift UI, react native, Unity, C#, C/C++ HTML, java, CSS, PHP, Laravel, CI, flutter, Python, Node.js,React.js AL/ML WordPress, WooCommerce for design: Canva, Figma, adobe photoshop, adobe illustrator, HubSpot. ➡️We will provide you ✨Budget Friendly service ✨Quality service ✨Support/maintenance ✨Timely meetings and updates Portfolio : https://www.freelancer.in/u/Zefinit Please open chat so we can start now. Thank you Khushboo
$500 USD in 7 days
5.1
5.1

Hi, I handle mobile app security remediation for live apps. I'll audit the current build for the usual vulnerability classes — insecure storage, weak auth/session handling, exposed API keys/endpoints, missing TLS pinning, outdated dependencies and OWASP MASVS items — patch each issue, then return a clean, fully tested release build for the store. You get a short report of what was found and fixed. Let me know iOS, Android or both and the stack (native/Flutter/RN) and I'll scope precisely. Muhammad Idrees / Global IT Vision Pvt. Ltd
$480 USD in 6 days
6.0
6.0

hi.. we have strong experience in mobile app security, ios and android development, and fixing vulnerabilities in live production apps. we can audit your existing codebase to identify security issues, patch the vulnerabilities safely, and ensure no regression in current features. we will also run proper testing on both ios and android builds to confirm stability before release. can we schedule a quick call to discuss the project in detail. it will help us understand your current app setup better and give you a clear plan for fixes, testing and delivery. we will also share our portfolio. mughira
$500 USD in 7 days
5.2
5.2

Regarding your project, I have a quick question: Could you specify the app's technology stack (e.g., native iOS/Android, React Native, Flutter) and if you have an existing security audit report that pinpoints the vulnerabilities? I plan to approach this by using static and dynamic analysis tools (SAST/DAST) combined with a manual code review to locate and validate the security flaws. For patching, I'll work within the existing codebase to implement secure coding practices, update any compromised libraries, and ensure the fixes don't introduce regressions. I previously tackled a similar challenge in a secure mobile banking app remediation project, where I identified and patched critical vulnerabilities related to insecure data storage and weak encryption, hardening the app against potential threats. Let's connect to discuss the architecture. Regards, Philip O.
$250 USD in 7 days
4.9
4.9

As an accomplished Full-Stack Developer with over 13 years of experience, I've honed my skills in Mobile App Development and Software Development to tackle projects just like yours. Having developed customized web automation (much like what you need for security patching), scraped data for various uses, and built AI solutions, I am confident that I possess the right set of skills to identify vulnerabilities in your app, patch them up, and deliver a clean, fully tested application. To illustrate my abilities further, I even recently completed a project that involved safety and reliability- transforming illegal bot activities into regulated, efficient systems. Just as crucial as that project was, your app demands the same meticulousness and attention. It's about finding those hidden risks and fixing them strategically to safeguard both you and your users. My comprehensive skillset revolves around Python— particularly critical given the NATURE of this task. Not only can we ensure a secure patch is applied promptly but we can reduce the likelihood of future breaches too. Overall, as someone who thrives on creating result-driven solutions and delivering high-quality work efficiently-- I'm confident I can provide you with the best possible outcome for your app's security. Let's connect and make your mobile app safer together!.
$250 USD in 1 day
4.9
4.9

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