React / Next.js Developer for Existing Platform(Remote)

Hi Alexander,

I’ve been working with React and Next.js professionally for quite a while, mostly on production SaaS platforms, dashboards, and client-facing applications. My day-to-day work includes building complex UI, integrating APIs, handling state management, optimizing performance, and maintaining scalable frontend architecture.

I’m also very comfortable joining existing projects mid-development. Adapting to an established codebase, understanding the current architecture, and continuing development without disrupting the project flow is something I regularly do.

One thing that’s especially important to me is maintaining consistency inside a project. Before adding new features, I spend time understanding how the existing system is structured — component patterns, naming conventions, folder organization, styling approach, and overall engineering decisions. I prefer extending what already works well instead of introducing conflicting patterns or unnecessary rewrites.

I can work independently, communicate clearly, and move quickly without sacrificing code quality or maintainability.

we already have a nearly ready similar setup for web platforms with React, Next.js, dashboards, API integrations and AI-assisted workflows, so we can adapt it quickly and start moving now ))

for a 2 month engagement, a realistic starting budget is around $12,000, depending on the current codebase quality, number of screens and integration depth.
we can work within the $35-$70 per hour range, with weekly visible releases and clean handover notes.

we would first audit the existing platform, stabilize the frontend structure, then improve responsive screens, dynamic pages, API states, loading and error handling, SEO basics and performance.
if useful, we can also add AI-assisted content workflows, internal admin helpers or support automation - not as a buzzword parade, more like a tool that saves actual hours.

relevant examples
… > https://business.ingello.com/platforma - platform architecture and business system logic
> https://business.ingello.com/forma-crm - CRM-style product development with roles, data flows and operational screens
> https://business.ingello.com/vorfahr - automation and AI-related product work, close to feature-heavy platforms

main portfolio for Freelancehunt
> https://systems-fl.ingello.com

QUick questions before the final estimate
> is the existing project already in production or still pre-launch
> do you need one dedicated developer only, or can we involve a small team for faster delivery

we are availble here and can start with code review, access setup and a short implementation plan =)--

Hello!

I am interested in your project as it closely aligns with my core experience: React.js, Next.js, TypeScript, API integration, responsive UI, and improving existing products.

I have over 8 years of experience in web/mobile development and have worked on Next.js/React projects where it was necessary not only to write new functionality but also to enhance architecture, performance, SEO, component structure, and code quality.

I also have experience working with existing codebases, where it is important to quickly understand the project, not break the current logic, and gradually improve the quality of implementation.

My availability: I can discuss starting soon, approximately part-time/full-time depending on your needs.
…
I would be happy to look at the project details, GitHub/codebase, or task list and propose the best work plan.

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Experienced React/Next.js developer ready to enhance your platform. I specialize in responsive UI, API integration, clean TypeScript code, and performance SEO. I’ve completed similar projects on GitHub and can start immediately. Let’s discuss scope and schedule.

Hello! We’re ready to take on your project. We have a well-established onboarding process for existing Next.js/TS repositories: we quickly get to grips with the current architecture, adapt to the coding style, and start contributing without any lengthy ramp-up period.
We write strictly typed code, maintain UI consistency using Tailwind, and ensure that new features do not break existing functionality. We deliver turnkey solutions: from secure API integration to delivery strictly within agreed deadlines.

The proposed deadlines and rate range suit us perfectly. To provide clear estimates for specific tasks, please grant us access to the project documentation and Git repository.
Our portfolio:
https://freelancehunt.com/showcase/work/crypto-marketplace-grizzly/1927346.html

Availability: full-time

… Could you tell us how your state management is currently organised (Redux, Zustand, Context) and whether CI/CD is set up for the test environment?

I’ve seen your project description and I’m ready to provide you with a detailed work plan and a professional project image tailored to your needs. However, I kindly ask that you send it directly through the platform to protect the exclusivity of my work and ensure no one else benefits from my effort. By working with me, you’ll receive a structured, results‑oriented plan that reflects modern best practices and guarantees measurable impact. I’m confident this collaboration will bring you the clarity and efficiency you’re looking for.

Hello. From the description, I see not a "one-time edit," but a task where normal logic is important and the solution should not fall apart in operation.
I would start with the main points: The project includes improvements to the frontend, work with adaptive UI/UX, API integrations, dynamic content pages, and the development of additional features.
Regarding implementation: I would structure the integrations and data exchanges to be idempotent, verifiable, and without "silent" errors; I would break the task into UI layer, business logic, and backend contour, so that the cabinet does not turn into a set of unrelated hacks.
Relevant experience: I have built end-to-end automation and API integration pipelines: data collection, filtering, enrichment, CRM connections, and reliable business logic.
Regarding timelines: the target is 7 days. As for the budget: 12000 — after a brief clarification of the technical specifications, I will provide a precise figure, but this is the general range.
If you want, I can provide a short implementation plan in the first message and immediately show where time/money can be saved without losing quality.

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Hello!

ViACore is a digital team with strong expertise in React / Next.js development, UI/UX, and building production-ready web platforms.

We regularly work with:

— React.js / Next.js
— TypeScript
— Tailwind CSS
… — API integrations
— SSR / SEO optimization
— responsive UI/UX
— performance optimization
— scalable frontend architecture

We have experience in both developing new platforms and enhancing existing projects with an already established codebase. We know how to work carefully within existing architecture, maintain a clean project structure, and write maintainable production-quality code.

What we can offer:

— strong frontend development
— modern responsive UI
— integrations with backend/API
— SEO-friendly Next.js implementation
— speed optimization and Core Web Vitals
— stable communication and transparent workflow
— accountability for tasks and deadlines

Some examples: https://viacore.group

We also have experience working with SaaS, CRM/ERP, marketplaces, and custom business platforms.

Availability: we can connect in the near future.
Work format: long-term collaboration / milestone-based / hourly.

We would be happy to learn about your current projects and discuss the details of collaboration.

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Hello!
I am a manager of developers team, who is working professionally with React/Next.js, API integrations, having UI skills and much more! We can help you with your project and guarantee high-quality.
Today you can contact us and get a consultation for free!

Check more about us here https://devoxen.space/en
Write me a DM here on freelancehunt!

Hello. I have experience with nextjs, typescript, css, using BEM, pixel perfect, responsive pages.
Examples of work:
https://alerzi.github.io/Fitness/
https://alerzi.github.io/Agency/
https://alerzi.github.io/Construct/

Good day. I am an individual developer offering my services to improve and complete your Next.js/React projects. I have over 4 years of commercial experience in full-stack development, working officially through a sole proprietorship without intermediaries, so I guarantee maximum involvement and direct daily communication. My stack includes Next.js, TypeScript, Tailwind CSS, REST/GraphQL API. I will independently conduct a code review, set up the correct SEO structure, fix responsiveness issues, and implement new features. My rate is $40/hour, and I am ready to invest 120-140 hours per month in your product for the entire duration. Examples of my approach to building architecture and interfaces can be seen at 3magency.co and https://vilors.studio/, and I will send the GitHub link in private messages.

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Hello. Our small team of full-stack developers is ready to engage in the development of your web platform and handle the entire pool of tasks turnkey. We have over 4 years of experience working with the React ecosystem, Next.js, asynchronous requests, state managers (Redux Toolkit, Zustand), and setting up dynamic content (blogs, catalogs, custom calculators). We guarantee clean production-quality code without accumulating "technical debt" and perfect responsiveness on all devices. Our projects: freshagro.com.ua, farfieworldwide.com, rivnekolo.com.

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Good day. My colleague and I are interested in your proposal. For the last 4 years, our main focus has been on scaling, optimizing speed, and refining existing projects on Next.js (App Router) and Node.js. We write exclusively in TypeScript, create flexible and reusable UI components with Tailwind CSS, and reliably connect the frontend with any backend services with data validation. Clear communication, daily commits on GitHub, and results-oriented work.

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Hello. My partner (full-stack developer + UI/UX designer) and I are ready to strengthen your team and take on existing web platforms, with over 4 years of experience in developing commercial projects using React and Next.js. We specialize in clean code architecture, TypeScript typing, and building complex responsive interfaces using Tailwind CSS. We have extensive experience in integrating REST APIs, optimizing rendering (SSR/ISR), and Core Web Vitals for better SEO. We fully align with your hourly rate (aiming for $50/hour), are ready to dedicate at least 30 hours per week to the project, and can start working as early as Monday. Our portfolio and examples of implemented interfaces: hyperfi.tech, espressolab.com.ua, hudi.com.ua. We will send our GitHub in a private message.

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Hello! I am interested in your vacancy. I have experience. Write to me and we will agree.

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Hi,
React/Next.js, TypeScript, Tailwind, API integrations — stack i use a lot. Can also cover backend if needed, building it clean and scalable using DDD and GoF patterns.

GitHub: https://github.com/axbuglak
Portfolio:
https://web.rstays.com
https://momicro.com
https://ai-desk.ai

… Available to start within a few days.
Best regards, Alexey Buglak

Hello! My partner and I have been working as a team on React/Next.js projects for 4 years — we have strong experience with Next.js, API integrations, responsive UI/UX, Tailwind, and TypeScript. We work with clean and scalable architecture, SEO/performance optimization, and can quickly integrate into an existing project without losing quality. We are ready to help with the completion and development of the platform, maintain stable communication, and provide regular progress updates on tasks. Examples of our work: apple-family.com.ua/uk, 3magency.co

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Hi!

React/Next.js, TypeScript, Tailwind, API integrations, SEO — my daily stack for the last few years.

Recent work:
https://guidetoiceland.is/
https://adsmanager.paramount.com/
https://nextel.cloud/

… Available to start this week. What does the project look like?

Hi!
Strong React/Next.js developer here — TypeScript, Tailwind CSS, API integration, SEO optimization are all part of my standard workflow.
My work:
— https://github.com/kenoleeee/kenoldev-studio
— https://castoclub.com/
— https://github.com/kenoleeee/creatorflow
Availability: ready to start immediately, full-time available.
Rate: $35-50/hr depending on task complexity.
Looking forward to discussing the details!

Welcome! We are a team of technical specialists with 4 years of experience in website support, cybersecurity, and frontend development. Projects on React and Next.js are our specialty, where we use clean Typescript and Javascript. We can easily connect to your codebase, understand someone else's code without disrupting its logic, and add the necessary features or payment integrations.
Examples of our commercial layouts and interfaces can be found at the links farfieworldwide.com, freshagro.com.ua, and espressolab.com.ua.
Message us privately to show the current code and discuss the task list.

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Welcome! Our team has been developing and supporting complex web applications for 4 years. We have solid experience working with Javascript and Typescript, so we will easily understand the architecture of your existing project on React and Next.js. We will quickly get up to speed, conduct refactoring, fix current bugs, optimize loading speed, or implement new functionality as per your request.
You can evaluate our level of responsive layout, work with e-commerce, and UI/UX design through our active projects: farfieworldwide.com, freshagro.com.ua, espressolab.com.ua.
We are ready to conduct an audit of the current code and start working.

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Hi Alexander,

React and Next.js is what I do full-time across client projects. Frontend work, API integrations, responsive UI, dynamic pages. Jumping into someone
else's codebase and continuing where they left off is just... normal Tuesday for me at this point.

One thing I care about that might matter for your decision: I read existing code before writing anything new. Whatever patterns are already in the
repo, I follow them. Folder structure, naming conventions, state management approach, component organization. I'd rather be consistent with what's
there than introduce something "better" that creates two competing styles in the same project.

… On the technical side, TypeScript, Tailwind, Next.js App Router, API integrations, SEO and performance optimization are all part of my daily workflow.
I've shipped 25+ production apps, 100% completion rate on this platform (35 projects, 10/10 average review). PCAP certified, active on Codeforces and
LeetCode if algorithmic thinking matters for your use case.

Available for the full 2 months, and I can work within your hourly range. Timezone overlap hasn't been an issue on past projects since I keep
communication responsive regardless.

Can share GitHub and walk through similar work in DMs. Two quick questions though:

1. App Router or Pages Router?
2. How many developers have worked on this so far? Trying to get a sense of how consistent the existing patterns are likely to be.

Hello!

My name is Alex, and I represent NC-1, a dedicated development group.

For over five years, we have been building websites, mobile applications, online stores, ERP/CRM systems, and other e-commerce products. I would like to propose our specialist for your project on an outstaffing basis — a Full-Stack Developer, Middle.

Technical Stack & Tools:
Languages & Core: PHP, JavaScript, SQL, HTML5, CSS3

… Frontend: React.js, Next.js, Vue.js, Nuxt.js, jQuery, Tailwind CSS, Bootstrap

Backend & Databases: Laravel, MySQL, PostgreSQL, MongoDB

Infrastructure & Tools: Docker, Git, GitHub, GitLab, Jira, Trello

About the Developer:
He has over 4 years of extensive experience in the IT industry, with a particular focus on web development, e-commerce, and solution/product creation. As a committed and outcome-driven IT professional, he possesses a passion for programming. He is currently seeking a developer position where he can apply his exceptional coding skills to contribute towards the goals and aspirations of a project while further improving his abilities.

Alignment with Your Project Requirements:
Having reviewed your job description, he is an excellent fit for finalizing and improving your web platforms. With strong expertise in React.js/Next.js, Tailwind CSS, and API integrations, he delivers clean, scalable code and high-quality responsive UI/UX. Furthermore, his backend experience with PHP/Laravel allows him to understand full-stack architecture deeply, making API wiring and dynamic content implementation seamless.

We are fully available to start, highly reliable with communication, and comfortable with your 2-month timeline and $35–$70/hour rate.

We would be glad to share his detailed CV, portfolio, and relevant GitHub links upon request. Looking forward to your response!

Best regards,
Alex
NC-1 Development Group

Good day
My name is Angelina. I work with React.js / Next.js, TypeScript, and modern frontend stack for web platforms and SaaS projects.
I have experience in:
— responsive UI/UX
— API integrations
— dynamic content pages
— Tailwind CSS
— performance/SEO optimization
— scalable frontend architecture
… — Next.js App Router
I have also worked with dashboard systems, e-commerce, and content platforms with a large volume of dynamic content.
I write clean and maintainable code, work well with existing codebases and long-term projects.
I can quickly get up to speed on a project and help with the completion and development of the platform.
I can send my GitHub/portfolio and project examples in private messages 👍

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Hello. I am a front-end, react / next.js developer with over 6 years of experience. Let's discuss the details.

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Hello,
I’m interested in your project. I have experience with React.js, Next.js, Tailwind CSS, TypeScript, responsive UI, and API integrations.
I’m comfortable working with existing projects, improving UI/UX, and building clean, scalable solutions.

Hello!

We are a frontend-focused development team with strong experience building and scaling modern web platforms using React.js and Next.js. We regularly work on production-ready applications that require clean architecture, responsive UI/UX, API integrations, SEO optimization, and high performance.

Our team can help with:

* improving and refactoring existing frontend architecture;
* building responsive and modern UI components;
* dynamic content pages and CMS-driven functionality;
… * API integrations and state management;
* performance optimization and SEO improvements;
* scalable TypeScript-based development.

Our stack includes:

* React.js / Next.js;
* TypeScript;
* Tailwind CSS;
* REST / GraphQL APIs;
* modern UI systems and component architecture.

We follow clean coding standards, maintainable structure, and collaborative Git workflows. Performance and UX are always priorities for us, especially on content-heavy or interactive platforms.

We’ve worked on multiple similar projects, including SaaS platforms, eCommerce systems, dashboards, AI-based products, and custom business platforms with complex frontend logic.

We are available for long-term collaboration and can dedicate consistent development time throughout the 2-month project timeline.

Ready to share relevant GitHub repositories, portfolio examples, and discuss the current state of the platform in more detail

Hello, Alexandr.
I hope you are doing well.

As a full stack developer, the next.js, tailwind css, TS, and api integrations in my main skills.
Based on this experience I can build your project as perfectly.

Also I am very interested on your peoject and want to discuss about the project more details.

Thank you.

Вітаю! 👋

Маю досвід роботи з React / Next.js проєктами, доопрацюванням існуючих веб-платформ, адаптивним UI, API integrations, dynamic content pages та оптимізацією SEO/performance.

Мій основний стек:

Frontend:
React
Next.js
… TypeScript
Tailwind CSS
responsive/mobile-first UI
reusable component architecture
API / Backend understanding:
REST API integration
FastAPI / Django REST Framework
PostgreSQL
auth/session flows
form handling and validation
Quality / Workflow:
Git / GitHub
clean code structure
scalable components
code review
performance optimization
SEO-friendly implementation

Що можу запропонувати:

покращення існуючого frontend;
responsive UI/UX fixes;
інтеграцію API;
створення dynamic pages;
розробку нових features;
refactoring компонентів;
оптимізацію Core Web Vitals;
SEO-налаштування для Next.js.

Працюю структуровано: швидко входжу в існуючу codebase, роблю зміни через зрозумілі PR, підтримую чисту архітектуру та нормально комунікую по статусу задач.


GitHub / портфоліо / приклади подібних проєктів готовий надати в особистих повідомленнях.
Чекатиму Вашого повідомлення!

З повагою,
Андрій

Hello,
I have 5 years of commercial experience with React.js.
I have been working with Next.js and TypeScript for 3 years. I also use Tailwind CSS.

My github profile https://github.com/kkravchenko

Ready to execute. Quickly and qualitatively. There are also bonuses after completion. Always in touch. Details in private messages.

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Hello,

I’m a React / Next.js developer with 10+ years of experience building modern web applications and scalable frontend systems. I have strong experience working with existing projects, improving UI/UX, integrating APIs, and delivering clean, maintainable code.

My stack includes:

* React.js / Next.js
* TypeScript
* Tailwind CSS
… * REST API integrations
* Responsive and mobile-first UI development
* SEO and performance optimization

I’m comfortable working inside active codebases, improving architecture, and implementing new features while keeping the project scalable and production-ready. I also focus on clear communication, reliability, and fast turnaround.

I’m available to start immediately and can dedicate consistent hours throughout the project duration.

Best regards

I am a NextJs, React, NestJs developer. I am ready to take on this task.

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Hello.

I'm NodeJS developer. I have experience with React and Next.js. Ready for work. Lets talk.

Good day, I have 10 years of experience in development, working with the tech stack on React Native (+TypeScript), React.js (Next/SSR +TypeScript), backend Node.js (Express/Nest) + MongoDB, Firebase + TS.
Can I take a look at the code?
Feel free to write, I would be happy to collaborate.
Best regards, Oleksiy.

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Good day, my name is Pavlo,
✅ Work experience — 8 years,
✅ I have a profile on UpWork,
✅ I am very interested in your project. For detailed discussion of all nuances — please contact me,
✅ I always take deadlines with a buffer,
✅ I will complete everything on time and according to your wishes,
✅ Worked at WayPoint (SEO Junior) — 6 months,
✅ Worked at MagicTraffic (SEO Junior) — 6 months,
✅ Worked at Transparen (Canada),
… ✅ https://transparen.com/
✅ ReactJS Developer,
✅ React Native (iOS) Developer,
✅ Also, turnkey website development: DLE, WordPress, Joomla, Bitrix24, WooCommerce,
✅ I have a good understanding of the logic, structure, and architecture of projects,
✅ I quickly understand other people's code and projects,
✅ I constantly learn and update my knowledge according to current trends,
✅ I know how most technologies work "under the hood," even if I sometimes don't remember the exact syntax — I quickly catch up,
✅ I can consult on UX/UI, taking into account my experience in mobile applications,
✅ I can work with APIs, Firebase, payment system integration,
✅ I never "abandon" projects and stay in touch after completion,
✅ I work independently, without the need for constant supervision,
✅ I am open to feedback and corrections at any stage,
✅ I work with both fixed tasks and hourly payment.

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Hello!

My stack is React, Next.js (App Router), TypeScript, Tailwind CSS. API integrations, responsive UI, clean scalable code — this is my daily work.

Portfolio: github.com/Oleksandr004

One of my key projects is Uptime Sentinel, a SaaS platform for real-time monitoring of websites and services. The system tracks availability and latency, manages incidents, and sends notifications via Telegram. Under the hood — Next.js + NestJS, WebSocket for real-time updates, BullMQ/Redis for background tasks, Docker, and CI/CD for deployment on AWS.

This is not a learning project — it is a production-ready architecture that I designed and implemented myself from the database to the UI.
…
I don't just "build components" — I think about scalability, code readability, and long-term project support. This is what sets me apart from most freelancers on such projects.

Availability — immediately, 30–40 hours/week.

Ready for a short call to discuss the details.

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Hi, I have the right skills for this
Send me a private message, and we can discuss the rate and working conditions
I'd be happy to help you!

Hi,

I am a Product-oriented Software Developer with over four years of experience specializing in building and scaling performant web applications within the React and Next.js ecosystem. Your project requirements align perfectly with my core technical stack, as I routinely utilize TypeScript and Tailwind CSS to deliver modern, highly responsive UI/UX improvements. In my previous roles, I successfully maintained high-traffic Next.js platforms, taking full ownership of custom RESTful API integrations, dynamic content rendering, and rigorous SEO and Core Web Vitals performance optimization.

For example, I recently developed complex, high-performance layouts for international web platforms and engineered scalable frontend architectures that flawlessly handled large datasets. I am fully available to commit to the two-month project duration and can start immediately to help you seamlessly complete and enhance your existing platform.

Hi.
Responsive UI + API integrations + dynamic content pages on Next.js, that's our day-to-day. Recently shipped Winbix.AI (multi-tenant Next.js 15, 30+ paying clients) and Pixoree (Next.js 15 + Clerk + UploadThing).
Starting point: paid audit, 3 days as a separate milestone. Walk through current code, build a backlog of critical fixes with priorities, give an hourly estimate for the 2-month scope. Done = backlog + hourly estimate + milestone plan.
Quentar, a 6-dev studio (UTC+2). For this project: 1 senior fullstack + 1 QA, PM coordinates at no extra cost.
GitHub, live portfolio and a short Loom walkthrough of a project on a similar stack, I'll send in DM.
Two questions:

App Router or Pages Router on the current projects?
What working-hours overlap do you need with your timezone?

Good day!

I have experience in designing and developing large platforms. Currently, I am also developing an ERP system with a large number of various microservices (frontend and backend just like your stack).

I would be happy to discuss this project and will approach the implementation responsibly as always.

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Hello, Alexander! I am interested in your vacancy. I have extensive experience in commercial development using React and Next.js, and I specialize in the development, optimization, and scaling of existing projects on react.js/vue.js. I would be happy to discuss the project details in correspondence.

Best regards, Yuri

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Hello, I have done heavy integrations and SEO optimizations, - https://daily-a2hj.onrender.com/ this site is implemented on Next.js and Tailwind CSS.

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Hello! After reviewing your project, I am ready to start working on it. I can offer optimal solutions to achieve the best results.

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Hello.I have been working with Next.js and Node.ja for more than 9+ years.I’m ready to cooperate.

Could you share a bit more about the current state of the platform and the main tasks you need help with?

I’m a Full Stack Developer with strong experience in React.js, Next.js, TypeScript, and Tailwind CSS. I’ve worked on scalable web platforms, responsive UI/UX, API integrations, dashboards, and performance optimization.

Projects:

https://creonix.io/
https://mustage.team
https://verify.mustage.team
…
Available to start immediately and work consistently during the project.

Best regards,
Ihor

Hello! I will complete your task quickly and efficiently.

My portfolio: https://freelancehunt.com/ua/freelancer/romas6ka.html#portfolio
Feel free to write, I will start working today. I look forward to collaborating with you!

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Hi Alexander,

I’m a React / Next.js developer with 5+ years of experience building and improving production web apps. I work daily with React, Next.js, responsive UI, and API integrations, and I focus on clean, scalable code.

I’ve also used Tailwind CSS, TypeScript, and done performance/SEO optimization for existing projects. I can share my GitHub, portfolio, and similar projects in private messages.

I’m available to start soon and can work within your hourly range.