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I have an existing AI-powered web application that currently has several bugs and technical issues that need to be fixed. Tech stack: * Frontend: React.js * Backend: Python and Node.js * AI/LLM integrations * APIs and database The project is already developed. I am NOT looking for someone to build a new application from scratch. I need an experienced full-stack developer who can review the existing code, identify the root causes of the bugs, and fix them properly. Important: Due to the confidential nature of the project, I cannot share the full source code or upload the complete project to the freelancer. The developer will need to work remotely on my laptop using remote-access software such as AnyDesk, TeamViewer, Chrome Remote Desktop, or another similar solution. The source code will remain on my computer. I will explain and demonstrate the current bugs through screen sharing. You will then investigate the frontend, backend, APIs, and AI-related functionality, make the necessary changes directly on my laptop, and test the fixes. I am looking for someone experienced with: * React.js * JavaScript / TypeScript * Python * Node.js * REST APIs * AI / LLM integrations * Debugging existing applications * Frontend/backend integration * Database and API troubleshooting * Git * Working with large or unfamiliar codebases AI project experience is strongly preferred. The ideal developer should be a strong problem solver who can find the actual cause of a bug instead of applying temporary fixes. You should also be careful not to break existing functionality while making changes. The initial task is to fix the current bugs and verify that everything works correctly. If the work goes well, there may be additional development and maintenance work afterward. When applying, please provide: * Your experience with React, Python, and Node.js * Your experience with AI/LLM projects * Examples of similar debugging work you have done * Your hourly rate or estimated project cost * Your availability * The remote-access software you are comfortable using Please apply only if you are comfortable working remotely on the client's computer. The full source code will not be transferred or shared outside my laptop. I am looking for someone who can start as soon as possible.
Project ID: 40672283
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226 freelancers are bidding on average $133 USD for this job

Dear Valuable Client, At CnEl India, our senior full-stack developers specialize in rapidly diagnosing, troubleshooting, and debugging complex production codebases across React.js, Python, Node.js, and AI/LLM integrations. We are completely comfortable working directly on your local machine via AnyDesk, TeamViewer, or Chrome Remote Desktop to protect your project confidentiality. Our Debugging Methodology: Systematic Root-Cause Analysis: Trace API request flows, inspect browser dev tools, analyze Python/Node.js server logs, and review state management in React to identify core issues without applying band-aid fixes. AI/LLM & Pipeline Diagnostics: Debug LLM API calls, prompt/response parsing, vector storage/context payload errors, and asynchronous execution bottlenecks across your backend integrations. Isolated Fixes & Regression Protection: Refactor problematic logic, fix database queries/REST endpoints, and carefully verify that dependent modules remain fully intact. Live On-Device QA & Verification: Test every fix live in your local environment, ensuring seamless frontend-to-backend data flow before wrap-up. We are ready to connect on AnyDesk and start immediately! Best regards, CnEl India Team
$140 USD in 15 days
9.0
9.0

Hello, I'm Yasir Shah, and I have exactly the skills and experience you're looking for to debug your AI-based web application. With over 15 years of industry experience, I have excelled in roles that demanded a meticulous approach to troubleshooting and fixing bugs in large codebases. During my time, I have developed a strong proficiency in all the necessary technologies for this project, including React.js, Python, Node.js and AI/LLM Integrations. One of my core beliefs as a developer is to fix problems at their root cause rather than applying quick band-aid solutions that could lead to further issues down the line. My clients rely on me to provide comprehensive fixes that won't break any existing functionalities while ensuring overall stability. Having worked with numerous unfamiliar codebases before and succeeded in debugging them effectively, I am confident I would be able to do a great job on your project too. As you choose who to work with on this project, keep in mind that my deep understanding of Frontend/Backend integration, REST APIs and Database troubleshooting would be a big advantage for navigating your application's complexities. Additionally, with my extensive knowledge of git systems, you can expect meticulous version control that allows easier reversion if needed. My rate is $X per hour and I'm available to start immediately at your convenience. Thanks!
$180 USD in 3 days
8.6
8.6

Hello, I can see the real pain point here: the bugs are scattered across React, Python, Node, APIs, and AI logic, so the risk is hidden cross-layer breakage. I’ve fixed similar full-stack issues in existing web apps by tracing the root cause first, then applying safe code changes without disturbing working features. I’m comfortable working through remote access on your laptop, reviewing unfamiliar codebases, and validating each fix directly in the running app. I’ve shared an initial estimate based on your description, and once we go over a few technical or functional details, I’ll confirm the exact cost and delivery schedule. Which bug is the highest priority, and does it appear in the frontend, backend, or AI/API layer? I’ll keep the process clear and collaborative, and I’ll focus on making the fixes stable rather than quick. Could you show which bug is the highest priority, and do you already know whether the failure is happening in the frontend, backend, or AI/API layer? Could you also confirm whether the app uses Git for versioned changes during the session? Looking forward to your reply so we can finalize the exact plan. Thanks, Asad
$75 USD in 3 days
8.2
8.2

Hi, I can fix the current bugs and technical issues in your AI-powered web application. My approach will involve a thorough review of the existing codebase, identifying the root causes of the bugs, and implementing effective solutions without compromising existing functionality. I will utilize my expertise in React.js, Python, and Node.js to debug the application effectively. I have extensive experience with AI/LLM integrations and troubleshooting APIs and databases, which will be crucial for this project. I will work remotely on your laptop using AnyDesk or TeamViewer, ensuring that the source code remains secure. I understand the importance of confidentiality and will adhere to all necessary protocols while working on your project. I am a strong problem solver and will ensure that I find the actual causes of the bugs rather than applying temporary fixes. I am available to start immediately and can provide examples of similar debugging work upon request. My hourly rate is competitive, and I am comfortable using the remote-access software you mentioned. Ready to start immediately!
$70 USD in 3 days
8.4
8.4

Hi, I can debug and fix your existing AI application without rebuilding it. I’ll work directly on your laptop, trace the issues across React, Python/Node.js, APIs, database and LLM integrations, and make sure the fixes don’t break existing functionality. I have 10+ years of development experience and can start immediately. Comfortable with AnyDesk, TeamViewer, or Chrome Remote Desktop. Estimated cost: $100–$150 Availability: Immediate Thank you Regards, Sai
$120 USD in 2 days
7.8
7.8

I can debug the existing React-based AI web application across its frontend, Python/Node.js backend, REST APIs, database interactions, and AI/LLM integrations without requiring the source code to leave your laptop. My approach would be: 1. Reproduce each reported issue through screen sharing. 2. Trace the problem through the React UI, backend services, API requests, database, and AI integration layer. 3. Identify and fix root causes rather than applying temporary workarounds. 4. Test each fix and verify that existing functionality remains intact. 5. Summarize the changes and any remaining technical risks. My relevant technical coverage includes React, JavaScript/TypeScript, Python, Node.js, API development, databases, troubleshooting, debugging, and AI-related application development. I’m comfortable working with a confidential codebase through remote access, with the project remaining on your computer. Which remote-access tool will you use, and can you provide a prioritized list of the current bugs for the initial session? I propose starting with the reported issues and delivering the initial fixes and verification within 3 days, subject to the number and complexity of bugs.
$250 USD in 3 days
7.5
7.5

Hi, We’ve carefully reviewed your requirements and can troubleshoot your existing AI-powered web application across the React frontend, Python/Node.js backend, APIs, database, and AI/LLM integrations. Our team has experience with: • React.js, JavaScript/TypeScript frontend debugging • Python and Node.js backend troubleshooting • REST API and frontend-backend integration • AI/LLM API and workflow debugging • Database and data-flow troubleshooting • Root-cause analysis instead of temporary fixes • Git-based development and regression testing • Working with large and unfamiliar codebases We understand that the application is already developed and that you need targeted debugging rather than a rebuild. We’ll first reproduce and isolate each issue, identify its root cause, implement the appropriate fix, and test related functionality to avoid introducing regressions. We’re also comfortable working remotely on your computer through AnyDesk, TeamViewer, Chrome Remote Desktop, or another tool you prefer, with the source code remaining on your machine. We can begin with an initial debugging/diagnostic session and then estimate the remaining effort based on the actual issues identified. Best regards,
$240 USD in 7 days
7.4
7.4

Hello I specialize in stabilizing complex AI-driven architectures. With deep expertise in React, Python, and Node.js, I will methodically audit your stack to isolate root causes, ensuring your LLM integrations and API endpoints function reliably. I focus on clean, maintainable fixes that preserve your existing logic while optimizing performance. I am ready to dive into your codebase immediately to restore full functionality. Could you share the specific areas or error logs where you are encountering the most friction? Best regards, Giáp Văn Hưng
$85 USD in 7 days
7.0
7.0

Hi,I can help you debug and stabilize your existing AI-powered web application without requiring the source code to leave your laptop. I’m comfortable working remotely via AnyDesk, TeamViewer, or Chrome Remote Desktop. My expertise includes: • React.js, JavaScript/TypeScript • Python & Node.js • REST APIs & database troubleshooting • AI/LLM integrations • Frontend/backend integration • Git and debugging large/unfamiliar codebases I’ve worked on similar full-stack applications where I traced issues across the frontend, backend, APIs, database, and AI integrations to identify the actual root cause rather than applying temporary fixes. I’ll reproduce each bug, investigate the underlying issue, implement a safe fix, and test the affected functionality without disrupting existing features. I’m fully comfortable working directly on your laptop while keeping your confidential source code on your system. Availability: Immediate Remote Access: AnyDesk / TeamViewer / Chrome Remote Desktop Rate: $12 USD/hr I can start as soon as possible and would be happy to review the bugs with you through screen sharing. I can also share relevant portfolio examples of similar AI/full-stack projects. Best regards,
$110 USD in 15 days
7.8
7.8

Hello Dear, I’m Md Toriqul Islam, and I’m excited to partner with you & I can dive into your project immediately. I understand you need an experienced developer to debug your existing AI web application remotely, identify root causes, fix frontend and backend issues, and preserve existing functionality. I have rich experience in React.js, Python, Node.js, APIs, databases, AI integrations, and debugging complex existing codebases. I am skilled in JavaScript, TypeScript, REST APIs, LLM integrations, Git, database troubleshooting, and remote debugging. I’m comfortable working through AnyDesk, TeamViewer, or Chrome Remote Desktop and can start immediately. Looking forward to hearing from you. Best regards, Md Toriqul Islam
$75 USD in 3 days
6.8
6.8

Hi there, I can help debug your AI-based web application by reviewing the existing code remotely and fixing the current bugs. With my experience in React.js, Python, and Node.js, I’m well-equipped to handle the complexities of your tech stack. I understand the importance of maintaining the current functionality while addressing the issues you’re facing, and I’m ready to start immediately. I am comfortable using remote-access software like TeamViewer or AnyDesk to collaborate directly on your laptop. I provide thorough problem-solving skills and a focus on delivering robust solutions without temporary fixes. Your satisfaction is my priority and I guarantee that I will deliver you a high-quality result. Regards, Ali
$30 USD in 1 day
6.5
6.5

Hi, I'm Denis, a full-stack developer who has worked on debugging and stabilizing AI-powered applications built with React, Node.js, and Python. I understand you need someone to review the existing codebase, identify the root causes of the bugs, and apply fixes directly on your machine through remote access. My approach would be to first reproduce the issues through screen sharing, then systematically check the frontend state management, backend API flows, and AI/LLM integration points. I’ll ensure changes are minimal and tested to avoid breaking existing functionality. I’ve debugged similar systems where inconsistent API responses or React state mismatches caused AI output errors, so I’m comfortable tracing issues across the stack. I work with AnyDesk, TeamViewer, and Chrome Remote Desktop. I can start working right away. Let's connect and discuss the details. Thanks, Denis.
$30 USD in 3 days
6.5
6.5

Hello, Debugging an unfamiliar codebase over remote access is a different discipline than fixing your own code, you can't grep through history or run things freely, so the real skill here is auditing efficiently under those constraints without breaking what already works. With 10+ years across MERN and Python, I've handled several bug-fixing projects specifically, and I'm comfortable auditing an existing codebase live rather than needing to rebuild context from scratch, which fits the remote-access constraint you've described well. Experience with React/Python/Node: 10+ years full-stack across the MERN stack and Python backends. AI/LLM project experience: Hands-on with LLM integrations (OpenAI, Claude, and similar) in production applications. Rate/estimated cost: $10/hour Availability: 6 hours of overlap in EST. Working hours: 1 PM IST to 11PM IST Remote access tool: Comfortable with AnyDesk, TeamViewer, or Chrome Remote Desktop, whichever you prefer. I have my environment ready to start today. Regards, Sudesh A
$100 USD in 7 days
6.6
6.6

Hello, We would be glad to assist you with this project. Protovo Solutions LLP is an experienced technology and business solutions agency serving global clients since 2016. We have successfully completed projects in custom software development, CRM and ERP customization, SaaS platforms, marketplaces, e-commerce, AI automation, digital marketing, and virtual assistance. Our team has hands-on expertise in Laravel, CodeIgniter, PHP, Node.js, React, Python, WordPress, Shopify, PrestaShop, OpenCart, PerfexCRM, RISE CRM, Odoo, APIs, automation, SEO, data management, and business support services. With more than 100 client reviews on Freelancer, we understand the importance of clear communication, reliable delivery, quality work, and ongoing support. We can review your complete requirements, recommend a practical approach, and execute the work through clear milestones. Relevant work samples and technical details can be shared during our discussion. Please connect with us through chat so we can discuss the requirement and take this forward. Kind regards, Protovo Solutions LLP
$250 USD in 7 days
6.9
6.9

Hi there, I read your project "Debugging AI-Based Web Application" and it matches what I do with PHP, React.js. I have delivered similar work before and can start right away. I can complete it in 4 days for 300 USD, revisions included. Can you share any extra details or files so I can confirm the scope? Happy to start today.
$300 USD in 4 days
6.4
6.4

With extensive experience in developing AI systems that actually work in production environments and integrating them into various workflows, I believe my unique skillset makes me an ideal fit for your project. My proficiency in Node.js, Python, and React.js will be invaluable for debugging your existing web application effectively. Prioritizing quality over quick fixes, I have a proven track record of not only identifying but understanding the root causes of bugs. My familiarity with AI/LLM projects aligns perfectly with your specific requirements. Understanding that navigating unfamiliar codebases can be challenging, I reassure you that I am adept at tracing complex problems and resolving them without breaking other functionalities. Additionally, my encyclopedic knowledge of REST APIs, databases, frontend-backend integration will further ensure a smooth-sailing debugging process. As for my remote working capabilities, I am well-versed in using tools like AnyDesk and TeamViewer, so getting up to speed fast won't be an issue. Lastly, while I fully respect the confidentiality of your project and understand that you won't be able to share the full source code or upload it for me to examine thoroughly. However, this doesn't discourage me since my experience working with large or unfamiliar codebases will be particularly helpful in debugging without full access
$140 USD in 7 days
6.5
6.5

Hello Since the application is already built, the priority is finding the root cause of each issue without disrupting working features or requiring your source code to leave your laptop. I can debug React, Python, Node.js, APIs, databases, and AI/LLM integrations directly through AnyDesk, TeamViewer, or Chrome Remote Desktop, tracing issues across the frontend/backend flow rather than applying temporary patches. I’m comfortable working with unfamiliar codebases and can reproduce each bug, identify the underlying cause, implement the fix, and test the affected functionality end-to-end before moving to the next issue. If you share the main bugs you’re currently seeing, can we start with a remote debugging session? Rahul
$150 USD in 7 days
6.7
6.7

As an experienced full-stack developer with a strong background in Node.js, PHP, and React.js, I have successfully debugged complex applications across various tech stacks. I understand the crucial nature of your project's confidentiality and have wide-ranging experience working on remote development projects similar to yours via AnyDesk, TeamViewer or Chrome Remote Desktop. I always make it a top priority to respect my client's needs and take full responsibility for their code. In line with your project's requirements, my problem-solving skills combined with my familiarity with large codebases and debugging techniques will enable me to quickly identify and resolve the root causes of the bugs in your AI-based web application without compromising any existing functionalities. Additionally, my proficiency in Python, REST APIs, and database troubleshooting further positions me well for effectively handling the pertinent aspects of your project that involve AI/LLM integrations. As you mentioned the possibility of expanding the scope of work beyond debugging alone, it's worth noting my substantial experience extending from maintaining existing projects to enhancing them. This should bode well for any potential post-debugging tasks your application might require. And importantly, I am excited to get started as soon as possible! Let's connect and ensure a seamless experience as we iron out those bugs in your innovative AI-powered web application.
$250 USD in 5 days
6.3
6.3

Are you dealing with async race conditions in Node, blocking Python threads during LLM inference, or React state desyncs causing phantom re-renders? Debugging a multi-tier AI app requires isolating whether the bottleneck sits in prompt token limits, streaming API payloads, or backend connection pools. As a Senior Full-Stack and System Architect with 15+ years of production experience, I specialize in diagnosing complex codebases without breaking legacy states. I am fully comfortable working via AnyDesk or Chrome Remote Desktop directly on your machine. My Tech Stack Focus: • Frontend: React.js, TypeScript, precise state management. • Backend: Python (FastAPI/Flask) and Node.js for async orchestration. • AI/LLM: OpenAI, LangChain, embeddings, and context window optimizations. I have spent over a decade tracing deep integration bugs across distributed systems, ensuring root-cause resolution rather than temporary band-aids. Hourly Rate: $75/hr Availability: Immediate start, ready to jump on a remote session today. Let us jump on a quick call to review the symptoms and map out the Looking forward to discussing the architecture.
$140 USD in 3 days
6.4
6.4

Hi, I understand you want a careful, hands-on review of an AI-powered web app to diagnose and fix bugs remotely, without sharing code. I’ve done similar debugging across React frontends, Python/Node backends, and AI integrations, prioritizing stable, minimal changes. Execution: I’d start during screen share by tracing the failing flows, reproduce locally on your laptop, apply targeted fixes, and verify with quick sanity checks and spot tests. One risk: AI call paths and data contracts can drift, so fixes must be validated against real usage. Two questions: 1) What should we verify first if a fix reappears: API responses, frontend state, or AI prompt handling? 2) Are there specific AI prompts or data contracts we must preserve to avoid regression? If we're aligned, I can outline the implementation phases before kickoff. Best regards, Brandon
$100 USD in 1 day
6.0
6.0

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