
Closed
Posted
Paid on delivery
I have a partially-built, modern web application that needs a sharp React/[login to view URL] developer to take it to the next level. You’ll pick up the existing codebase, refine the responsive UI, wire up new screens, and ensure smooth communication with our backend through well-structured REST endpoints. Clean, maintainable code is non-negotiable, and I value proactive communication with brief progress notes every few days so we stay aligned. Your day-to-day will include: • Extending and polishing React components with styled-JSX or your preferred CSS-in-JS approach • Implementing mobile-first responsiveness that behaves consistently across modern browsers • Integrating and testing REST calls for data fetch, mutation, and authentication flows • Hooking the frontend to our database layer (currently flexible on tech—happy to discuss MongoDB, PostgreSQL, or MySQL depending on what fits best) • Setting up secure auth (JWT or OAuth2) and handling edge-case states gracefully • Writing clear, well-commented code and submitting pull requests that pass automated checks To help me gauge fit, please send: • Links or repos for two or three React/[login to view URL] projects with similar API integrations • A concise outline of how you’d phase the work and an estimated timeline • Your proposed hourly rate or a fixed-price breakdown by milestone Once we agree on scope, I’ll provide repo access, API documentation, and the current UI designs so you can dive straight in. Looking forward to collaborating and shipping something great together!
Project ID: 40695993
175 proposals
Remote project
Active 21 hours ago
Set your budget and timeframe
Get paid for your work
Outline your proposal
It's free to sign up and bid on jobs
175 freelancers are bidding on average $430 USD for this job

Subject: Proposal for Your Web Development Project Hi, Afte r reviewing the details of your project , I’m excited about the potential to collaborate with you. With over a decade of experience in web development, I’m confident in my ability to deliver exceptional results. Here’s why I believe I’d be a great fit for your project: Front-End Development: I have expertise in HTML, CSS, JavaScript, and Bootstrap, enabling me to create visually appealing, responsive designs. Back-End Development: Proficient in CodeIgniter, Laravel, MySQL, and PHP, I can provide robust and scalable solutions. Platform Experience: I am well-versed in WordPress, Shopify, WooCommerce, Elementor, and Webflow. Design/UI/UX: I specialize in Figma, jQuery, and converting PSD files to HTML to ensure a seamless user experience. I am available to start right away and can accommodate your schedule. I would love to discuss how I can help bring your project to fruition. Looking forward to your response! Best, Muhammad Rizwan LA
$250 USD in 4 days
8.3
8.3

Hi, I went through your project details and understand what you're looking to achieve. I'd be interested in working with you on this. Based on the requirements you've shared, I can handle the project from start to completion while keeping the work aligned with your expectations, timeline, and desired outcome. My approach is straightforward: first, I'll make sure the requirements and expected deliverables are clear. Then I'll complete the work in structured stages, share progress along the way, incorporate your feedback, and deliver the final work after everything has been reviewed. Before we begin, I have a couple of questions about your requirements that will help me understand the scope more accurately. Feel free to message me so we can discuss the details and determine the best way to move forward. Best regards, Anum
$250 USD in 1 day
6.9
6.9

Hi, I would be happy to help you build a high-quality, scalable solution. I have 9+ years of experience developing custom software, websites, mobile applications, SaaS platforms, CRM/ERP systems, AI-powered applications, blockchain solutions, and games for clients worldwide. My expertise includes: React.js, Node.js, TypeScript, Python (Django), Laravel, CodeIgniter, WordPress, Shopify, AWS, Docker, AI Integration, Blockchain, Flutter, Android, and iOS. Before starting, I'd like to discuss your project goals, required features, timeline, and budget so I can recommend the most suitable technical approach and provide an accurate estimate. I'm available to start immediately and would be glad to schedule a quick chat. Looking forward to hearing from you! Best Regards Anju
$300 USD in 14 days
6.6
6.6

Hello Sir, I have already worked on similar types of website and software development projects and I am confident that I can successfully handle your project. I am a full-time freelancer with **17+ years of experience** in web development, software development, automation, and API integrations. My expertise includes: * Android app development * ASP.NET C# web and software development * Python automation and web scraping (Amazon, Instagram, Facebook, Google Maps, LinkedIn, Telegram, and other custom scraping solutions) * JavaScript, jQuery, AJAX, Bootstrap, HTML5 * Microsoft SQL Server database development * Payment gateway integration * SMS, Email, Banking, Financial, and Insurance API integration * Custom automation bots and workflow automation software I focus on delivering **high-quality, scalable, and reliable solutions** with clean code and long-term support. Please contact me in private chat so we can discuss your requirements in detail. I can also show you a **demo of similar projects** I have completed. Looking forward to working with you. Thanks & Regards
$750 USD in 3 days
6.1
6.1

My priorities would be maintainability and integrations. I’d refine the mobile-first component system, normalize REST calls through a clear service layer, handle loading/error/empty states consistently, and implement JWT/OAuth securely. For the database, I’d choose PostgreSQL, MongoDB, or MySQL based on the actual data relationships rather than forcing a preference before reviewing the backend. I work comfortably inside existing codebases using Git/PR workflows and can provide concise progress updates every few days. I’d phase this as codebase/API review, UI and feature implementation, auth/integration work, then responsive/regression QA. A relevant example is FileChannels, where I worked with React/Redux, real-time messaging, Stripe, CRM integrations, authentication, and shared application workflows. I can provide a milestone estimate and pricing once the current screens/API scope is visible rather than padding a quote around unknowns.
$500 USD in 7 days
5.9
5.9

Hello! I'm Karthik, a seasoned web developer with over 15 years of experience, specializing in React and Next.js. I'm excited about the opportunity to refine your partially-built application and elevate its UI and functionality. I have a proven track record of delivering high-quality projects with clean, maintainable code. My approach focuses on: - Responsive UI: Enhancing your existing components with styled-JSX or my preferred CSS-in-JS method to ensure a seamless experience across all devices. - REST API Integration: Efficiently integrating and testing REST calls for data operations and secure authentication flows using JWT or OAuth2. - Proactive Communication: Providing regular updates to keep us aligned, ensuring a smooth development process. Relevant Experience: I’ve successfully completed similar projects, which I can share via links upon request. Proposed Approach: 1. Codebase review and UI refinement (1 week) 2. REST API integration and testing (1 week) 3. Final adjustments and deployment (1 week) Rate: I propose a fixed price of $600, with milestones for each phase. Looking forward to collaborating and delivering an outstanding product together! Best, Karthik
$600 USD in 7 days
5.3
5.3

Hi, Picking up a partially-built codebase is mostly about understanding what's already there before adding anything — otherwise new screens fight the existing patterns. I understand the goal: refine the responsive UI, wire up new screens, and connect the frontend cleanly to your backend via well-structured REST endpoints. My approach: 1. Review the existing repo, component structure, and current API patterns before writing code. 2. Extend and polish React components using styled-JSX or a consistent CSS-in-JS approach. 3. Implement mobile-first responsiveness tested across modern browsers. 4. Integrate and test REST calls for fetch, mutation, and authentication flows. 5. Set up secure auth (JWT or OAuth2) with graceful handling of edge cases. 6. Submit clear, commented PRs that pass your automated checks. 7. Send brief progress notes every few days to keep us aligned. Proposed phasing: - Phase 1: Repo review, component audit, and UI refinement plan. - Phase 2: New screens and responsive polish. - Phase 3: REST integration, auth, and edge-case handling. - Phase 4: Testing, PR cleanup, and handover. A few questions: 1. Which database are you leaning toward — MongoDB, PostgreSQL, or MySQL? 2. Is auth already partially built, or starting fresh with JWT/OAuth2? 3. What's your preferred PR and review workflow? Let's discuss in chat. Thank you!
$470 USD in 5 days
4.6
4.6

I am ready to help you take your modern web application to the next level by refining the responsive UI, wiring up new screens, and ensuring seamless communication with your backend. My background in full stack web development includes working extensively with React, REST APIs, and database layers such as PostgreSQL and MySQL. To approach this work, I would begin by reviewing the existing codebase and UI designs to align on the current state. Phase one would focus on extending and polishing React components and ensuring robust mobile-first responsiveness. Phase two would involve integrating and testing REST calls for data fetching, mutations, and secure authentication flows, followed by hooking the frontend to your chosen database layer. Throughout the process, I will provide brief progress notes every few days to keep us aligned and ensure clean, maintainable code with smooth pull requests. Let us discuss the project details so we can get started.
$500 USD in 7 days
3.6
3.6

Hi, The current project lacks completion and requires refinement of the UI and backend integration. What specific areas of the UI do you want to prioritize for immediate enhancement? Here's how I'd do it: - Review the existing codebase and identify critical UI components to refine with styled-JSX. - Wire up new screens and implement mobile-first responsiveness for consistent behavior across browsers. - Integrate REST calls for data fetching and handle authentication with JWT, ensuring all code is well-commented and maintainable. I can have a working version of the core piece ready on a test link within a day. What’s the best way to get started on this? Toqeer
$250 USD in 7 days
3.7
3.7

Hi, I notice the existing codebase needs refinement, particularly in responsive UI and REST endpoint integration, so I'd approach this by setting up a real-time sync between the frontend and backend. My focus will be on writing clean, maintainable code with proactive communication. I'll extend and polish React components with styled-JSX for a consistent look. In my experience, a common mistake is not handling edge-case states in authentication flows, so I'll make sure to set up secure auth with JWT or OAuth2 and write clear, well-commented code. The client can expect a smooth communication with the backend through well-structured REST endpoints, and I'll submit pull requests that pass automated checks.
$500 USD in 7 days
3.5
3.5

Hi, hope you are well. I have read the details you shared and I understand the outcome you want. I am a reliable freelancer with 10+ years of experience in PHP, JavaScript, Mobile App Development, CSS and I helped many clients in the past. Visit my profile to check my latest work and reviews from past clients. I would love to connect in chat to discuss details. Talk soon, Olusoji
$250 USD in 7 days
1.7
1.7

Hi, The main challenge is taking over an existing codebase without creating inconsistent components or breaking the current API and authentication flows. I’d first review the project structure, existing components, API contracts, and responsive behavior, then work through the UI and backend integration in focused milestones. I’d keep the code maintainable, handle loading/error edge cases, and provide brief progress updates throughout. If you share the repository and current API documentation, I can review the architecture and suggest the first milestones. Regards, M. Hasan
$250 USD in 4 days
0.0
0.0

Hi, Your project doesn't need someone who simply follows the brief. It needs someone who understands what you're trying to achieve and figures out how to get you there. That's how I approach projects. Before writing code or jumping into execution, I want to understand the problem, the goal, and what success actually looks like for your business. I've spent the last several years turning business problems into working digital products, leading developers and designers, managing projects from idea to delivery, and delivering 40+ web and mobile projects. Do I know everything? Absolutely not. But I know how to solve problems. If I don't have the answer, I'll find it. I'll research, learn, test, ask the right questions, and keep working until we have a solution. And once I'm on board: It's our business. Our problem. Our responsibility. I'll give you my honest opinion, challenge ideas when I see a better approach, and never agree just for the sake of keeping things comfortable. I work with clients because I care about building things that succeed. If you're looking for someone who will take ownership rather than simply complete tasks, I'd be happy to learn more about what you're building.
$250 USD in 5 days
0.0
0.0

Hello, I am interested in working on your project. I have experience in web development and can create a clean, responsive, and user-friendly website according to your requirements. I will communicate clearly, complete the work within the given deadline, and make sure the final project meets your expectations. I can also make necessary changes based on your feedback. I am ready to start immediately and look forward to working with you.
$500 USD in 7 days
0.0
0.0

I bring extensive expertise in delivering reliable, high-quality solutions across a wide range of projects. I understand the importance of clear communication, attention to detail, and, most importantly, completing tasks on time and according to the client’s requirements. I take a professional and results-oriented approach to every project, ensuring that work is delivered efficiently while maintaining quality and functionality. Whether you need help with a new application, existing software, debugging, enhancements, or ongoing development, I can work with you to turn your requirements into a practical solution.
$750 USD in 7 days
0.0
0.0

I would start with a short repository/API review, then agree a small first delivery rather than put a fixed price on an unknown remainder of the application. The frontend should use authenticated API endpoints; database credentials should not be exposed in browser code. My USD 650 first-milestone scope covers up to three existing or new screens from supplied designs, responsive component refinements, connection to documented REST endpoints and integration with your existing authentication flow. I would include loading/error/expired-session states, focused regression tests and reviewable pull requests. New backend modules, a new identity system or a broad database redesign would be estimated separately. I have 20+ years of software development and integration experience. I can explain the implementation approach in detail without presenting private client repositories as public evidence. Which three screens are the priority, and is authentication already implemented server-side? Estimated duration is 8 days after the checklist, access and funded milestone, with brief progress notes and an agreed start date.
$650 USD in 8 days
0.0
0.0

Lahore, Pakistan
Payment method verified
Member since Sep 7, 2026
₹100-400 INR / hour
$750-1500 USD
₹1500-12500 INR
€30-250 EUR
€6-12 EUR / hour
₹12500-37500 INR
$10-30 USD
$15-25 USD / hour
$10-30 USD
₹750-1250 INR / hour
$30-250 USD
₹1500-12500 INR
₹12500-37500 INR
$30-250 AUD
$250-750 USD
₹12500-37500 INR
$750-1500 CAD
$250-750 USD
₹750-1250 INR / hour
$10-40 USD