Budget: 500 USD Deadline: 1 day
Hello! I work on improving existing web applications: I analyze other people's code, find and fix bugs, enhance functionality, and integrate with AI.
I am ready to review the project, identify the problem, and propose a solution.
I can start right away.
Budget: 500 USD Deadline: 5 days
Hello Benedict, if the invoice app is failing now, I can quickly trace the issue in the existing codebase, fix the broken parts, and improve the workflow without rebuilding everything from scratch. I’ve spent 8 years delivering and supporting web projects, including debugging, front-end improvements, and WordPress/JS-based systems. I’m comfortable working with current code, adding features, and keeping things stable. Let’s discuss the stack, scope, and your timeline.
Budget: 500 USD Deadline: 5 days
Good day.
I am ready to work on your project.
Experience of over 20 years.
viacore.group
Budget: 500 USD Deadline: 7 days
Hi, I recently worked on a similar AI invoice tool that was half-broken when I took it over: I traced why the LLM generation kept failing, fixed the invoice PDF export, cleaned up the data flow, and added editable line items. Digging into an existing codebase and stabilizing it before adding features is exactly the kind of work I do.
If your generation relies on a single AI call per invoice, adding a validation pass on the model output catches malformed fields and cuts broken invoices by around 20-30%.
A couple of practical questions: what stack is the current app on, and do you already have a list of the bugs, or should I start with an audit? Also, roughly how many invoices go through it now?
About me: 6+ years across Next.js, Node and Python with LLM integrations, and I'm available to start this week. I propose we connect, and I'll put together a short technical breakdown of the current issues and a fix plan.
Budget: 500 USD Deadline: 5 days
🚀💡 Restoring complete reliability and speed to your AI invoice generator is the fastest path to giving your users an effortless, error-free automated billing experience.
Having carefully reviewed your project details, I am genuinely excited about your AI-powered invoicing platform. Automated document generation is a massive productivity booster, but when the underlying workflow breaks—whether due to unstructured AI API responses, state management mismatches, or edge-case rendering bugs—it degrades user trust. My goal is to dive straight into your existing codebase, isolate every point of failure, and transform your application into a polished, high-performing asset.
🎯 Core Problem
Your application currently encounters runtime failures or inconsistent behavior during the AI invoice generation lifecycle, preventing users from dependably generating, editing, and exporting accurate invoices.
🛠️ Tailored Solution
- Codebase Audit & Diagnostics: Execute a rapid end-to-end trace of your web frontend, backend handlers, and AI API calls to resolve unhandled exceptions and silent failure states.
- AI Pipeline Hardening: Enforce strict response schema validation (JSON structured outputs) and retry fallbacks so AI-generated line items and totals map cleanly to your invoice templates every time.
- Performance & UX Upgrades: Streamline state handling, improve asynchronous loading feedback for end-users, and refactor existing modules into clean, production-ready code.
🌐 Relevant Project Examples
- Flashback Sports Replay Cam (https://apps.apple.com/us/app/flashback-sports-replay-cam/id6759502739) - A high-performance iOS application centered on real-time data processing and smooth state management, similar to coordinating instant data rendering on your invoice web app.
- Clipback (https://play.google.com/store/apps/details?id=app.clipback) - An Android utility built for low-latency media handling and reliable client-side execution, reflecting the stability and performance standards needed for your generation workflow.
⚡ Collaboration & Availability
- Timezone & Communication: EST
- Value & Delivery: Clean, maintainable code, clear documentation of all fixed bugs, and rapid turnaround on immediate fixes.
- Rate & Availability: Available to start immediately at $20/hr.
I am confident we can get your AI invoice app running flawlessly in short order. I look forward to reviewing the repository and getting to work!
Best regards, Leo
Budget: 500 USD Deadline: 7 days
I will sort out your AI invoice project and get it on track. My approach: first, a complete code audit and identification of root problems, then targeted fixes, optimization, and functionality improvements. I have 3+ years of experience with Python, C#, REST API, as well as integrating AI tools. I work quickly, stay in touch daily, and provide a clear report on changes. I am ready to start immediately. The estimated timeframe is 7 days for diagnostics and fixes, then as needed. The price is 450 USD, considering the complexity and your budget. We can discuss the details in a private message.
Budget: 500 USD Deadline: 1 day
Hello. I'm ready and willing to take on your project. I have two years of experience in AI, and more experience in software, app, and website development. I'd be happy to work with you. I charge a reasonable fee and work quickly.
Budget: 500 USD Deadline: 5 days
Hi. I have many years of experience developing code, both with code and using AI tools. I'm ready to study, understand the entire project, and fix any issues. I'm happy to provide links to my work with AI, please let me know.
Budget: 500 USD Deadline: 7 days
hey, lets go! my name is Ihor, i have big experience > 10 eyars, can share portfolio and git, my working time per day only 4 hours, becouse i work focused and carefull
Budget: 700 USD Deadline: 4 days
Hello, I am in the TOP 10 freelancers on the platform, I have completed similar projects before, I will do it quickly, efficiently, and at a low cost.
Budget: 500 USD Deadline: 5 days
Hello, I am ready to address the current web project for AI-generated invoices, find the cause of the failures, and carefully bring the application to a working state. I will start with diagnosing the existing code, logs, API integrations, and generation scenarios, then fix the errors and check the key user flow. I have relevant experience in full-stack development, working with AI integrations, backend/API, and web applications using React, Python, and Node.js. If a stack has already been chosen for the project, I will adapt to it without unnecessary restructuring; if not, I will suggest the simplest and most maintainable option for further development. I can also advise on where to strengthen the architecture to ensure the application runs more stably after the fixes. git: github.com/onyx144
Budget: 500 USD Deadline: 20 days
Hello!
I am interested in your project. I have over 7 years of experience in web development and specialize in auditing, refactoring, and fixing complex issues in existing codebases (legacy / in-development).
How I can help:
Quick Audit: I will review the codebase and logs to accurately pinpoint why the invoice generation is not working correctly.
Fix & Optimization: I will fix current bugs, stabilize the AI module, and refactor problematic areas.
Development: I will add necessary functionality or update existing features according to your requirements.
Experience and conditions:
Experience: 7+ years in Fullstack / Backend development, regularly working with AI APIs, automation tools, and deploying web services.
I am ready to dedicate up to 10 hours per week to the project.
I would be happy to look at the technology stack and discuss details in private messages. I am willing to sign an NDA if needed.
Budget: 500 USD Deadline: 1 day
Hello!
I'm ready to start working on your project today.
I work quickly and meticulously, ensuring the final result meets your exact standards.
I'm open to discussing the details.
Portfolio: 
Behance
Budget: 500 USD Deadline: 3 days
Good day. I am very knowledgeable in AI and web development. There will be no problems. I will do it quickly and efficiently! Feel free to reach out.
Budget: 500 USD Deadline: 5 days
Hi Benedict! Invoicing apps with AI often fail at parsing or prompt-response mapping, causing broken PDFs or extraction errors. I have experience refactoring and stabilising ready-made web apps with AI integrations.
Which AI API is used, and is the issue on the frontend or with the data generation backend?
Let's do a brief code review of the main module to locate the bottleneck.
Budget: 500 USD Deadline: 10 days
I'd be interested in helping with your project.
I have experience working with React, TypeScript, React Native, REST APIs, AI integrations, and existing production codebases. I'm comfortable diving into unfamiliar projects, identifying the root cause of issues, refactoring code, and implementing new features while keeping the application maintainable.
I also actively use AI development tools such as Cursor and Claude to speed up development, while always reviewing and validating the generated code before it goes into production.
You can find examples of my work in my profile. If you'd like, I can also share additional projects and discuss how I'd approach auditing and improving your application.
Rate: $15/hour
Availability: Available to start immediately, 30–40 hours per week.
Looking forward to hearing more about your project!
Budget: 500 USD Deadline: 4 days
First look: pull the repo, trace where invoice generation breaks (API calls, PDF output, AI prompt/response parsing) and log the actual errors.
Then fix the broken flow and check integrations end to end before adding upgrades, so nothing else breaks along the way.
Can show first fixes within 4 days.
Budget: 500 USD Deadline: 15 days
Hello ⭐️! I am a highly qualified web developer with over ✅ 7 years of experience in development and modern web technologies.
Recent projects:
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My stack includes:
✅ Frontend: HTML, CSS, JavaScript, React.js, Vue.js, Angular
✅ CMS: Wordpress(woo), OpenCart, Prestashop, Webflow
✅ Backend: PHP, Laravel, CodeIgniter, Python, Django, Flask, Node.js, Next.js
✅ Databases: MySQL, PostgreSQL
✅ Other skills: Git, API integration
Why choose me?
✔️ Fast and quality execution: Your tasks will be completed on time and with impeccable quality.
✔️ API integration: Need seamless integration of third-party APIs? I will take care of that.
✔️ Custom solutions: I take your ideas and turn them into successful web solutions tailored to your business needs.
Let's collaborate and create something amazing together!
Budget: 500 USD Deadline: 5 days
Good evening, I am ready to take on the work, I have good experience in AI development, as well as working with them.
I am ready to start now, write to me, and we will discuss the details.
Budget: 480 USD Deadline: 5 days
Benedict, an AI invoice generator that's broken usually means either the prompt/parsing logic is fragile or the AI response isn't validated before it hits your invoice model - that's where I'd start digging.
First step is a full read-through of the current codebase: how invoices get generated, where the AI call sits in that flow, and what's failing (bad output parsing, missing error handling, API changes, race conditions, whatever it turns out to be). I'll log the actual failure cases before touching anything, then patch the root cause instead of papering over symptoms. Once it's stable I can look at the upgrades you mention - better prompt structure, validation layer, retry logic, whatever fits what you want next.
I've built and shipped production LLM pipelines before (content generation with multi-agent flows, chatbots on OpenAI/Anthropic APIs), so working inside someone else's AI-driven app isn't new territory for me.
Realistic turnaround for diagnosis plus fixes is 7 days, faster if the codebase is small and well-organized.
What stack is this built on, and do you have access to logs or error messages from the failed runs?
