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My current project is a web-based application that already has a basic structure in place, but several key pieces still need expert attention—from refining the front-end experience to tightening up the back-end logic and deployment workflow. I need someone comfortable jumping into an existing codebase, diagnosing what works and what doesn’t, then delivering clean, maintainable updates that push the product closer to launch. Tasks likely to come up include integrating third-party APIs, improving page-load performance, addressing cross-browser quirks, and adding a few user-facing features that are outlined in the repository issue tracker. The stack so far leans on JavaScript (React on the front end, Node.js with Express on the server side) and a PostgreSQL database, all containerised with Docker; if you have better tooling suggestions, I’m open to them—as long as the end result stays lightweight and easy to maintain. To keep momentum, I prefer frequent, small commits and clear commit messages, paired with quick progress check-ins over chat or a short call. Please estimate how many hours you expect to need for the first milestone (bug fixes and performance tuning) so we can agree on a realistic timeline before expanding to new features. Deliverable for the first milestone: • Updated, working code pushed to the repo with no breaking tests • A concise change log explaining what was fixed or improved • Deployment instructions that work on a clean machine If this sounds like a project where you can add real value, let’s get started—code access is ready the moment we agree on scope.
Project ID: 40720517
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111 freelancers are bidding on average ₹940 INR/hour for this job

Hello, We can help stabilize and improve your existing web application without disrupting the current architecture or workflow. Our approach: * Review the existing React, Node/Express, PostgreSQL, Docker setup, repository structure, tests, and issue tracker. * Reproduce the reported bugs and trace them through frontend, backend, database, and API layers. * Identify performance bottlenecks such as unnecessary requests, slow queries, rendering issues, or inefficient assets. * Fix cross-browser and responsive issues while preserving the existing UI and functionality. * Integrate and validate required third-party APIs with proper error handling and secure configuration. * Implement agreed user-facing improvements using clean, maintainable components and backend logic. * Use small, focused Git commits with clear messages so changes remain easy to review. * Run existing tests plus targeted regression testing before each milestone handover. * Provide a concise changelog and verify Docker setup/deployment instructions on a clean environment. For the first milestone, we can estimate the required hours after reviewing the repository and issue list, so the bug-fix and performance scope is realistic before development begins. Regards, Chanchal CnEL India
₹1,000 INR in 80 days
7.7
7.7

Hi, I can help you with "Web Development Assistance Needed" as per your given set of instructions. Please get in touch to discuss more in detail and start with the initial discusssion. I usually work in small milestones, keep the code organized, and provide regular updates so changes are easy to review. Let's discuss the current setup. I'll suggest the best implementation and an accurate timeline. ⭐ 5.0/5 from a recent client: "A more professional version: “Excellent work! The job was completed within the committed timeline. Great quality, professionalism, and timely delivery. Highly appreciated and recommended.”" Final timeline and cost will be confirmed in chat after a complete understanding and documentation of the project expectations in detail.
₹875 INR in 1 day
6.6
6.6

Your project calls for a meticulous approach to refining both the front-end and back-end of your web application, which is exactly where I excel. I specialize in diving into existing codebases, diagnosing issues, and implementing clean, maintainable updates that align with project goals. Given your stack—React, Node.js with Express, and PostgreSQL—I will employ a test-driven development methodology to ensure that all changes are reliable and don’t introduce breaking tests. For bug fixes and performance tuning, I anticipate needing around 15 to 20 hours for the first milestone. This will involve diagnosing current issues, optimizing the code for better performance, enhancing page-load speeds, and ensuring cross-browser compatibility. I will also integrate any required third-party APIs while maintaining a lightweight architecture. My commitment to frequent commits and clear communication will ensure we stay aligned throughout the process. I will provide a concise change log and deployment instructions to facilitate a smooth handover. Let’s collaborate to bring your project closer to launch. Regards, Nabeel Abid
₹750 INR in 7 days
6.3
6.3

Hi, I can take over your existing React + Node.js/Express + PostgreSQL application and help move it toward a stable production launch without unnecessary rebuilding. I’m experienced in working with existing codebases, identifying bugs and bottlenecks, improving React performance, optimizing APIs and database queries, integrating third-party services, resolving cross-browser issues, and managing Docker-based deployments. For the first milestone, I would begin with a code and architecture review, then prioritize critical bug fixes and performance improvements. I’m comfortable working with frequent, small Git commits and providing clear progress updates. After reviewing the repository and issue tracker, I can provide an accurate hour estimate rather than guessing upfront. Delivery will include tested code, a concise changelog, and clean deployment instructions. Regards, DJ
₹1,000 INR in 40 days
6.8
6.8

The real challenge here isn't adding another feature. It's taking an existing React/Node application, finding where the current implementation is slowing the product down, and making the next changes without disturbing what already works. We work with custom web applications and can take over an existing codebase, trace issues across the UI, server and data layer, then make focused changes rather than rewriting stable parts. First, we'd review the repository and issue tracker, reproduce the bugs, then address performance and API/browser issues in small commits. After tests pass, we'd document the changes and provide clean-machine deployment instructions. For the first milestone, I'd expect the initial review to determine the exact scope before committing to an hour figure. Once repo access is available, we can confirm the estimate against the actual bugs and performance issues. 1. Which issue currently has the biggest impact on users or launch readiness? 2. After the first milestone, which user-facing feature is the highest priority? The bid amount and timeline are placeholders until we've reviewed the existing scope. Happy to discuss the repo and milestone here. Best Regards! Sagar jain
₹1,000 INR in 40 days
5.8
5.8

My name is AKSHAY, a highly experienced and versatile developer with a strong focus on your specific requirements of front-end and back-end tasks. With numerous projects boasting 94% completion rate and 100% timely delivery, I am confident in my ability to meet your project needs. I'm proficient in the tools you've mentioned such as JavaScript with React on the front-end, Node.js with Express on the back-end, and PostgreSQL for the database. My command extends to Dockerizing applications to ensure lightweight yet valuable results. A major strength of mine is my prowess at jumping into existing codebases, diagnosing their status and needs, and then executing clean updates that improve overall functionality. I am equipped to handle everything from integrating APIs to refining performance and even addressing cross-browser glitches. Furthermore, my experience with creating and maintaining clear deployment workflow instructions would ensure an effortless transition for your project. I align perfectly with your preference for frequent communication and small-yet-meaningful updates that maintain the trajectory towards launch. With me by your side, you can expect more than just high-quality coding—I'm dedicated to providing top-level customer service as well as leaving you with thoroughly tested code, insightful change logs, and efficient deployment instructions. I could begin making improvements upon agreement
₹860 INR in 40 days
5.6
5.6

As a seasoned Full Stack Web and Mobile App Developer with over 5 years of experience,Skills: in JavaScript, Node.js, NoSQL Couch & Mongo, Web Development and API integration among others, I can provide the expert attention your web-based application needs. Comfortable diving headfirst into new projects, I won't miss a beat when familiarizing with your existing codebase, identifying what works and what doesn’t, and delivering clean improvements that will bring you closer to the final product launch. I'm proficient with the tech stack you've employed so far, including React on the frontend, Node.js with Express on the backend alongside PostgreSQL and Docker. Should you require it though, I'm open to suggesting better tools as long as we maintain lightweight and maintainable structure. My communication style is rooted in transparency and efficiency. I prefer frequent updates that provide you with insights into my progress over chat or quick calls. Notably, I believe in delivering quality work so for our first milestone (bug fixes & performance tuning), I anticipate approximately [x] hours. This milestone will include updated code that works flawlessly without breaking current tests; an insightful change log that clearly outlines improvements made and finally, effective deployment instructions. Let's get started and transform your project into a masterpiece!
₹1,000 INR in 40 days
5.7
5.7

Hello, I can do this work. I have 5+ years of experience in Full-Stack Development with React, Node.js, Express, PostgreSQL, and Docker, and have worked on existing codebases, API integrations, performance improvements, bug fixing, and deployment. I will provide: • Clean fixes and improvements without breaking existing functionality • Third-party API integration and backend/frontend updates • Page-load and cross-browser performance optimization • Frequent small commits with clear messages and progress updates • Deployment instructions and a concise change log For the first milestone, I estimate around 20–30 hours, depending on the current codebase and issue complexity. I’d be glad to review the repository and confirm the exact timeline before starting. Warm Regards, Monica Bhatia
₹1,000 INR in 40 days
5.2
5.2

As a seasoned Full Stack Developer with over eight years of experience and the successful delivery of more than 200 projects, I'm confident I'd be a valuable addition to your web application project. My expertise includes skills in JavaScript and Web Development, which aligns perfectly with your needs for refining both front and back-end features. Whether it's integrating APIs, enhancing performance, or ironing out cross-browser issues - I've garnered proficient problem-solving abilities and an eye for details to deliver clean & maintainable codes that enhance user experience. Apart from my technical aptitude, my commitment to client satisfaction is unyielding. I ensure effective communication that promotes a smooth workflow along with quick progress check-ins over calls or chats. So whether it's bug fixes, performance boosters or new feature additions you need assistance with, you can count on me for my reliability combined with excellent skill set to deliver your desired outputs on time and within budget. Let's make this happen; code access is ready as soon as we agree. Ignite your project with my proven expertise!
₹750 INR in 40 days
5.2
5.2

I understand you need an experienced full-stack developer to take over an existing React/Node.js/Express/PostgreSQL application, diagnose the current codebase, fix issues and improve performance without disrupting working functionality. I’ll begin with a focused codebase audit covering React rendering, API/database performance, Docker configuration, browser compatibility, existing tests and deployment flow. For the first milestone, I’ll prioritize the repository issues, resolve bugs systematically, optimize slow pages/API queries, and validate third-party integrations. I’ll use small, focused commits with clear messages and regular progress updates. The first milestone will deliver tested working code with no broken existing tests, a concise changelog and deployment instructions verified on a clean Docker environment. I can provide a realistic hour estimate after reviewing the repository and issue list rather than guessing. A few questions: What test framework/coverage is currently configured? Which APIs are already integrated? Do you have a staging environment, and are there known performance bottlenecks or priority issues in the tracker? I’m confident I can bring the codebase closer to a stable, launch-ready state.
₹750 INR in 40 days
5.1
5.1

Your first milestone needs someone who can quickly understand the existing React/Node.js codebase, identify the actual bottlenecks, and fix them without introducing new issues. I have experience working on existing web applications with React, Node.js, Express, PostgreSQL, REST APIs, Docker, performance optimization, and bug fixing. I will first review the repository and issue tracker, identify the priority bugs and performance problems, then deliver the fixes through small, clear commits with proper testing. For the first milestone, I will provide the updated working code, change log, and clean-machine deployment instructions as requested. I can start with a codebase review and give you a realistic hour estimate for the first milestone before moving into additional features.
₹1,000 INR in 40 days
4.6
4.6

Hi, I understand you need assistance with your web-based application, which already has a foundational structure. With over 11 years of experience in full-stack development, I can effectively enhance your application by implementing the necessary features and optimizations. My approach will focus on: - Evaluating the existing architecture to identify areas for improvement. - Developing and integrating new features tailored to your requirements. - Ensuring a seamless user experience through responsive design and performance optimization. - Implementing robust backend solutions using PHP and Laravel, alongside RESTful APIs for efficient data handling. - Conducting thorough testing to guarantee stability and security. I specialize in transforming complex requirements into reliable software, ensuring that your application is not only functional but also scalable and secure. My commitment to clean architecture and performance will help elevate your project to the next level. Let’s collaborate to create a high-performance web application that meets your business needs. Best regards, Anil Prajapati
₹1,005 INR in 10 days
4.2
4.2

Hi, I specialize in React, Node.js, PostgreSQL, Docker, and API integrations, and I'm comfortable jumping into existing codebases to fix issues, optimize performance, and deliver production-ready improvements. I've spent 10+ years building and maintaining scalable web applications with clean Git workflows and frequent milestone-based commits. For the first milestone, I estimate 12–18 hours for bug fixes, performance tuning, cross-browser fixes, and deployment validation. I'll deliver working code with no breaking tests, a concise change log, and verified setup instructions for a clean machine. I communicate proactively, make small, review-friendly commits, and focus on maintainable solutions that keep your project moving toward launch.
₹750 INR in 40 days
4.1
4.1

Hi, I can jump into your existing React, Node.js/Express, PostgreSQL and Docker codebase, fix bugs, improve performance, integrate APIs, and handle deployment issues. For the first milestone, I estimate 15–25 hours, depending on the repository issues. I’ll provide clean commits, tested code, changelog, and deployment instructions. Ready to start immediately. Thanks!
₹1,000 INR in 40 days
3.9
3.9

Hi, I see the existing codebase needs attention to refine the front-end experience and back-end logic. I'd approach this by checking the repository issue tracker for outlined user-facing features. My focus is on delivering clean updates that push the product closer to launch. I've found that integrating third-party APIs can be tricky, so I'll set up a test environment to diagnose and fix issues. The client can expect updated, working code with no breaking tests, a concise change log, and deployment instructions that work on a clean machine as a result.
₹1,000 INR in 40 days
3.7
3.7

Hi I can take over the existing React/Node.js/PostgreSQL codebase and handle bug fixes, performance tuning, third-party API integrations, Docker/deployment issues, and ongoing features. I’m comfortable maintaining existing production applications and working through frequent, focused Git commits. Thanks Anshuman
₹750 INR in 40 days
3.8
3.8

Hi, Thanks for sharing your project. It aligns well with work I’ve successfully completed for other clients, and I’m confident I can deliver a high-quality solution tailored to your requirements. Before providing an accurate timeline, scope, and budget, I’d like to clarify a few key details to ensure we're aligned from the start. Freelancer’s proposal character limit makes it difficult to cover everything thoroughly here. If you're available, let's connect via chat. I can walk you through similar projects I've completed, discuss the best approach for your specific requirements, and answer any questions you may have. Once I understand your expectations, I'll provide a clear execution plan with realistic timelines and pricing. I’m ready to get started as soon as we finalize the details and look forward to working with you. Best regards, Mayank Sahu
₹1,000 INR in 40 days
3.7
3.7

I can step into your existing JavaScript, React, Node.js, Express, and PostgreSQL codebase to handle the bug fixes, cross-browser quirks, and performance tuning required for your first milestone. With my full-stack background, I am comfortable diagnosing an existing repository, working within your Docker containerised setup, and delivering clean, maintainable updates. To maintain strong momentum, I will provide frequent, small commits with clear messages alongside regular progress check-ins. For the first milestone focusing on bug fixes and performance tuning, I estimate needing 15 to 20 hours, depending on the current state of the issue tracker. My delivery will include updated working code pushed to your repository with passing tests, a concise change log detailing all fixes and improvements, and deployment instructions that run smoothly on a clean machine. Let's discuss the scope so I can get started on your code access right away.
₹750 INR in 7 days
2.9
2.9

Dear Client, I can improve and maintain your existing React, Node.js, Express and PostgreSQL web application and help make it launch-ready. I have 6+ years of experience in full-stack development and can work directly with an existing codebase to fix bugs, improve performance, integrate APIs and add required features. I can share my relevant work links in the chat box. Looking forward to your response on chat box. Thanks.
₹750 INR in 40 days
3.6
3.6

Hi, I have developed several projects of this kind, and at their core they involve jumping into an existing React, Node, Express and PostgreSQL codebase, diagnosing what works, and delivering clean, maintainable fixes and improvements. ? The most important and difficult part is finding the real causes of bugs and slow performance in an unfamiliar codebase without breaking existing behaviour. ✅ When I developed this kind of project, I actually faced flaky tests and unclear issues masking the true cause, slow page loads from heavy assets and unoptimised queries, and cross-browser quirks that only showed on certain devices. I solved this by reading the repo and issue tracker first to map priorities, fixing bugs with small focused commits and clear messages, improving page-load performance through asset optimisation and query tuning, resolving cross-browser issues with targeted CSS and polyfills where needed, and integrating third-party APIs with proper error handling. I kept the Docker setup clean, made sure no breaking tests were introduced, and documented changes and deployment steps for a fresh machine. ✅ The result is that the codebase moved closer to launch with working code pushed and tests passing, a clear changelog, and deployment instructions that worked on a clean machine. I can contribute to implement your idea with this kind of experience. Looking forward to discussing with you about your vision. Best regards, Michel
₹900 INR in 40 days
3.1
3.1

Indore, India
Member since Sep 19, 2026
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