The performer is excellent, I recommend
I will reach out more often)
Connecting the Backend via API to the React front end
All pages are designed and the backend connection has already started.
In addition to the connection, it will be necessary to slightly modify the front end (logo, text, change a couple of modals, and display additional information) - the work will literally take a day at most for these moments.
The connection itself will be done with the backend together for quick fixes.
The theme is a simplified version of a CSGO Marketplace.
Budget: 25 USD Deadline: 1 day
Good day, I have experience with this. I have been working with React for 5 years. I am ready to help with corrections and the API.
Budget: 500 USD Deadline: 4 days
Good day! I develop in Python, have worked on similar projects with React/Node.js, and am ready for collaboration.
Budget: 900 USD Deadline: 10 days
Hello.
ViACore is ready to join the project and bring the React frontend to a fully operational state.
We can take on:
— connecting the React frontend to the backend API;
— integrating authorization, marketplace, products/skins, balance, transactions, and user actions;
— handling loading/error states, data updates, and modal functionality;
— refining the interface: logo, texts, additional information blocks, UI adjustments;
— collaborating with the backend developer for quick API and logic alignment.
We understand the specifics of marketplace systems, where it is important not just to "connect requests," but to properly handle states, user operations, data updates, and UX flow.
From the description, it is clear that the main layout is already ready, so we can quickly engage in the project and focus specifically on logic and integration.
Cost estimate:
— starting from 800 USD for connecting and refining the current frontend;
— exact assessment after reviewing the React code, API, and list of screens/functions.
We can also take on further project development, production deployment, server-side, hosting, and technical support.
We are ready to discuss the details and review the current repository/API.
Budget: 36 USD Deadline: 1 day
Hello. I have been working with React and Node.js for over 9 years. I am ready to collaborate.
Budget: 2000 USD Deadline: 7 days
Hello!
My name is Evgeny, and I have been professionally developing mobile applications, websites, web services, and web applications for 7 years.
*The cost mentioned is for 1 hour of work. To provide a more detailed price, I would like to connect/call and discuss the details.
- You can review my portfolio, feedback, and awards in my profile.
Why should you choose me?
- I have taken 1st and 2nd places in international championships and competitions in the IT field.
- I have verified video testimonials and letters of appreciation.
- I am always available, honest, and reasonable.
- I work under a contract.
- I lead my own development team.
I would be happy to talk to you in more detail about the project.
Budget: 50 USD Deadline: 1 day
Hello.
I am a NodeJS developer. I am ready to take on the task. Write to me, and we will discuss.
Budget: 2000 USD Deadline: 7 days
Hello, I have worked on a CSGO Trading Platform with full API integration, payment processing, and real-time updates - perfect for your marketplace! The project serves over 15,000 users daily.
Are you planning to add real-time skin price updates and automatic synchronization with the Steam API for up-to-date item information?
I suggest we get in touch; I will provide you with a free technical consultation and we can outline a development plan + I will tell you about my team!
Budget: 30 USD Deadline: 1 day
Hello!
I will connect the backend to the React frontend via API — fetch/axios, handle responses, and adjust modals and UI to your design. I work with the backend collaboratively for quick on-site adjustments.
Budget: 3499 USD Deadline: 29 days
Good day! My name is Valentin, and I represent Arctic Web Agency. We are a team that specializes in creating modern and effective solutions for businesses. I can provide examples of our similar work in personal messages. We are ready to take your project into work!
Sincerely,
Arctic Web Team Freelancehunt
Budget: 200 USD Deadline: 4 days
Good day, Dmytro!
I will connect to your project and close the integration of the React frontend with the backend API without unnecessary bureaucracy. I understand the format of such tasks well, when the layout is already ready and it is necessary to carefully "revive" the project through the API + simultaneously refine the UI.
What I will complete:
* connecting the API to the React frontend
* working in tandem with the backend for quick fixes
* integrating authorization/data/marketplace logic
* refining modals and UI
* replacing logos, texts, additional blocks
* cleanup/restructure of the frontend if needed
* responsive/polishing before release
I understand the specifics of the marketplace under CSGO/skins, where the speed of the interface, clean UX, and proper synchronization of the frontend with the backend without "workarounds" are important.
I can quickly get involved in the work and communicate with the backend developer for an operational launch.
Budget: 75 USD Deadline: 2 days
Hello. I have reviewed your task regarding connecting the backend to the React frontend for the CSGO marketplace. I specialize in React and have experience working with APIs, so I will easily handle the integration and necessary adjustments to the frontend.
Since the layout is already ready, I will quickly set up data output, modal functionality, and replace static content. I have a good understanding of gaming services, so I can effectively collaborate with the backend developer for quick testing and fixing issues in real time. I will complete the work precisely according to your plan, maintaining the logic and structure of the project.
I am ready to start working today.
Message me privately, and we will discuss the details of the connection and get started.
Budget: 2000 USD Deadline: 30 days
Good day.
I have good experience working with React and connecting APIs, and I have also worked on projects where there was already a codebase, making changes and adding new functionality. I am good at understanding other people's code. I also have experience collaborating with backend developers, so I can quickly get involved in the process and make changes promptly.
I take my work seriously. I can start as soon as possible.
Budget: 200 USD Deadline: 2 days
Hey Dmitry,
Pages are done, backend partially wired. Good starting point.
Two things I need before committing to a timeline: Is there API documentation (Swagger, Postman, or even just a list of endpoints)? And what's the current state
management setup, Redux, Zustand, Context? That tells me how much of the service layer is already there.
For the integration, I'd build a service layer using whatever's already in the project (axios or tanstack-query) and get loading/error states working properly across
all pages. The part that actually matters for speed is syncing directly with your backend dev to fix contracts in real time rather than waiting on async messages.
The UI changes (logo, texts, modals, extra info) are a few hours once I'm in the codebase.
2 days, 200 USD. Share the repo when you can.
Budget: 200 USD Deadline: 3 days
I can quickly connect the backend to the already designed React frontend and simultaneously make the necessary adjustments to the UI: logo, texts, modals, and information display.
I have worked with React, TypeScript, Node.js/NestJS/Laravel, REST API, authorization, forms, modals, and integrating the frontend with the backend. I can carefully go through the already completed pages, connect the API, fix states/errors/loaders, and assist with minor changes on the backend side during integration.
I am ready to start today. After reviewing the API and frontend, I will be able to provide exact timelines, but for this volume, it usually takes 1–3 days.
Budget: 200 USD Deadline: 1 day
Hello!
We are dZENcode – a full-cycle digital solutions development company: from design and programming to integrations and post-release support. We take on projects from scratch and also engage in the refinement of existing solutions.
We can assist with connecting the backend via API to your React front-end and making specific interface adjustments.
Is the API and documentation for the endpoints ready for connection? Which screens or scenarios need to be launched first?
You can find detailed information about our services and rates on our website: Freelancehunt
Take a look – after that, we can discuss the details and agree on the next step.
⚠️ After clarifying all the details, we will determine the scope, the suitable format of cooperation: task-based, outsourcing, or outstaffing, and the final cost.
Why projects with us are guaranteed to reach release:
💎 10+ years providing IT services;
🔥 90+ in-house specialists;
🚀 250+ public reviews since 2015;
⚙️ We support the product under SLA after launch;
✅ We work under NDA and contract with the company!
Budget: 25 USD Deadline: 1 day
Hello, write to me in private messages
-------------------------------------------------
Budget: 200 USD Deadline: 5 days
Connecting the API to React: I will set up axios/fetch, state management, error handling, and loading states. Minor UI adjustments — logo, texts, modals — are included in the cost.
One question: what is the backend (FastAPI, Node, other)?
This will determine the speed — I work fastest with Python/FastAPI.
Budget: 1000 USD Deadline: 10 days
Hi,
I can connect your backend API to the React frontend and finish the small UI adjustments you mentioned.
I understand the current state: pages are already designed, backend connection has started, and you mainly need clean API integration plus a few frontend fixes like updating the logo, text changes, small modal edits, and showing some extra data.
I can handle the API connection with React in a stable way, making sure data flows correctly between backend and UI, and everything updates properly without breaking existing layout. Since you’re working on backend and frontend together, I can also quickly adjust endpoints and fix issues on the spot while we integrate.
For the frontend changes, I can update the UI elements you mentioned in a simple and clean way, keeping the current design intact while improving consistency where needed.
The goal will be to make the system fully functional like a lightweight CSGO-style marketplace, where frontend and backend work smoothly together without delays or broken states.
Once I see the current codebase and API structure, I can start immediately and finish this kind of task quickly.
Best,
Jeo
Budget: 500 USD Deadline: 3 days
Good day! I have reviewed the task and am ready to start.
Experience:
• 4 years in Frontend and Backend development
• 2 years of commercial experience in product and blockchain
• Working with production code and real financial scenarios
Some of my projects:
https://contentbuilder.ai/ - a commercial project from the USA, where I worked as a full-stack developer and implemented most of the functionality
https://freelancehunt.com/showcase/work/procasino/2025898.html
https://freelancehunt.com/showcase/work/bionrgg/2025897.htmlGood day! I have reviewed the task and am ready to start.
Experience:
• 4 years in Frontend and Backend development
• 2 years of commercial experience in product and blockchain
• Working with production code and real financial scenarios
Some of my projects:
https://contentbuilder.ai/ - a commercial project from the USA, where I worked as a full-stack developer and implemented most of the functionality
https://freelancehunt.com/showcase/work/procasino/2025898.html
https://freelancehunt.com/showcase/work/bionrgg/2025897.html
Budget: 100 USD Deadline: 1 day
Good day!
I have carefully reviewed your project and want to assure you: I am ready to answer any questions, even the most complex ones, to prove my competence and professionalism.
My work plan:
1. Connecting the backend via API – we will use optimized integration methods (Axios + React Hooks) so that the data is displayed instantly and without delays.
2. Setting up the frontend – we will change the logo, texts, and modal windows. We will add new interactive elements that will make the interface more modern and user-friendly.
3. Displaying additional information – we will implement dynamic blocks with data that can be easily updated from the backend.
4. Collaboration with the backend – we will set up a quick editing cycle through GitHub and Trello so that you can see progress in real-time.
💡 Unique ideas:
- "Smart modal windows" that adapt to user actions.
- An interactive statistics panel for users with bonuses and achievements.
- Gamification elements (levels, badges, rewards) that will motivate clients to return.
I am ready to conduct a demo session and answer any of your questions. Please contact me at your convenience – I am confident that our collaboration will be successful and productive.
Sincerely,
Budget: 350 USD Deadline: 5 days
Hello. I have experience with CS:GO cases only on a Telegram bot. Please send your backend as well as the React layout, and we will discuss the details. Do you already have all the endpoints included?
Budget: 600 USD Deadline: 5 days
Hello, Dmitry.
I understand the state of the project: the layout is ready, the backend is partially connected, and we have integration + specific UI adjustments left (logo, texts, modals, additional info).
What I will complete:
- I will finish the API integration on React (a clean service layer, correct loading/error states, axios or tanstack-query — based on what is already in the project)
- UI adjustments (logo, texts, modals, displaying additional info) — on the first day
- Coordination with the backend developer via call/chat: adjustments immediately, without waiting a day for correspondence
Is the Swagger/Postman collection ready, or are we adding endpoints as we go?
Budget: 100 USD Deadline: 2 days
Hello!
I have worked with React and API integrations, and the task is clear.
I can:
* connect the frontend to the backend API;
* refine the interface (logo, texts, modals, display additional information);
* work collaboratively with the backend developer for quick fixes and integration.
For an accurate estimate, I would like to see:
* the current frontend;
* the documentation/API;
* what has already been connected and what remains to be implemented.
Preliminarily:
* timeline: 2-5 days;
Budget: 200 USD Deadline: 3 days
Good day! I will complete the task quickly and efficiently, using the tanstack query; all requests will be cached and processed correctly. Write to discuss in more detail.
Budget: 80 USD Deadline: 1 day
Hello! Ready to collaborate. I can complete this task quickly and efficiently. Write to me)
Budget: 670 USD Deadline: 14 days
Hello! I am ready to quickly connect your backend to the frontend on React: I have experience integrating APIs, working with existing layouts, and making specific adjustments to the interface without delaying deadlines. I can promptly join the project, work synchronously with the backend developer, and complete both the integration of the main methods and minor UI adjustments in one day.
Budget: 100 USD Deadline: 2 days
Hello, my partner (designer + full-stack) and I are ready to quickly complete your project, having over 4 years of joint experience. I will handle the API connection on React (Axios/TanStack Query) and integration with your backend, while my partner will assist with logo, text, and modal adjustments. We are used to working in pairs with backend developers for quick data structure alignment. Our joint works: hyperfi.tech, espressolab.com.ua, hudi.com.ua.
Budget: 500 USD Deadline: 3 days
Hello! I can connect to your frontend on React and carefully complete the integration with the API, then make some minor adjustments to the interface: replace the logo, update texts, refine the modal windows, and display additional data in a way that looks natural in the current design.
Since work on the backend has already started, I will focus on connecting requests through a neat service layer, create clear loading and error states, and ensure that authorization, filters, and actions with elements remain consistent across all pages. During the joint connection to the backend, I can quickly make live adjustments and will keep the changes small and safe to avoid breaking the already approved layout.
One memorable idea that will make the product more premium without taking much time is a Live Price Pulse for each listing. It will gently animate when the backend returns a price change or availability update. This will make the marketplace feel more alive and reliable, and this feature can easily be turned off if a calmer interface is ever needed.
https://www.clicknova.de
https://app.cookiecad.com
Budget and timeline estimate: from $400 to $600 for complete API integration and minor frontend adjustments, approximately from 1 to 3 days depending on the number of endpoints and quick backend tweaks we will do together.
Thank you!
Budget: 800 USD Deadline: 4 days
Hello! I will address the API and front-end issues as quickly as possible. I am a pro in Node.js and JS, especially in real-time systems, so the marketplace logic is completely clear to me.
What I will do:
I will integrate the backend via API without unnecessary questions.
Front-end adjustments (modals, logo, content) — within a day.
I will synchronize with the backend developer for immediate changes.
Budget: 200 USD Deadline: 1 day
Hello!!!
Please send all the files, I will complete it within a day + I will create API Documentation.
Feel free to reach out.
Budget: 1000 USD Deadline: 1 day
Hello, I have experience working in the iGaming field. I will complete your task without any problems. Send me the source code, and we will discuss the budget and deadlines. I will be happy to help you!
Budget: 400 USD Deadline: 4 days
Hello! I am ready to connect the API to the React front-end and make minor adjustments to the interface. I have experience with React and backend integration.
Budget: 150 USD Deadline: 3 days
I am a NodeJS developer. I am ready to take on this task. Write to me, we will discuss.
Budget: 499 USD Deadline: 1 day
Hello. I can take on your order right now. If you're interested, message me privately.
Budget: 130 USD Deadline: 1 day
Hello! I have experience working with React and integrating frontend/backend through APIs. I can quickly connect the backend to the ready layout, refine modals, update UI elements, and work efficiently with the backend developer for quick fixes.
I have experience with marketplace/logical realtime projects and API integrations.
Examples of my work: apple-family.com.ua/uk 3magency.co
I am ready to start working quickly.
Budget: 400 USD Deadline: 7 days
Hello. I see that the backend is already partially connected and the pages are laid out - so this is about refining the existing code, not starting from scratch. A couple of modals, a logo, signatures - this is quick, the main thing is to understand the current status of the endpoints and the structure of the response from the marketplace API. I worked on a similar flow for a skin marketplace using React + FastAPI - displaying inventory, prices, trades. I collaborated with a backend developer in real-time, adjusting contracts on the fly. What is your backend stack and is there already documentation for the API? Or are we discussing methods in the chat for now?
Budget: 150 USD Deadline: 1 day
Feel free to reach out, I have experience working with code of any complexity. We will handle everything and figure out the best way to implement it.
Budget: 1000 USD Deadline: 7 days
Good day! I am ready to take on the task of connecting the backend via API to your React frontend (CSGO Marketplace). I understand the task: Most of the pages are already designed Partially started connecting the API Need to complete the integration Minor frontend adjustments (logo, texts, a couple of modals, displaying additional information) — up to 1 day We will work together with the backend developer for quick adjustments
What I will do: Complete connection of all API endpoints Work with authorization, profiles, inventory, trading, balance, etc. Handling states (loading, error, empty) Integration with Redux / Context / Zustand (depending on your stack) Necessary UI/UX improvements according to your specifications Testing and debugging together with the backend
To get started, I need: Access to the frontend repository API documentation (Swagger / Postman / endpoint descriptions) Specifications for minor adjustments (what exactly to change)
I am ready to start today or tomorrow. Please let me know when it is convenient to call or send access — I will look at the project and clarify the cost if necessary. Best regards,
Budget: 25 USD Deadline: 3 days
Hello! I will complete your task quickly and efficiently. Can I take a look at the API and the frontend?
My latest works
https://florist-map.vercel.app
https://indexfast.pp.ua
https://monitortest.pp.ua
https://mamamia.pp.ua
My portfolio: https://freelancehunt.com/ua/freelancer/romas6ka.html#portfolio
Feel free to write, I can start working today. I would be happy to collaborate with you!
Budget: 1200 USD Deadline: 7 days
Hello
My name is Dmitry. I work with React, API integrations, and frontend/backend connections.
I can quickly join the project, connect the backend via API, and simultaneously make necessary adjustments on the frontend: logos, modals, texts, and displaying additional information.
I have experience with marketplace/interface projects and realtime/API logic. I also work well with backend developers for quick fixes and synchronization.
I am ready to get to work quickly 👍
Budget: 100 USD Deadline: 3 days
Good day. I will carry out your task, hourly rate $13, write to me.
Budget: 80 USD Deadline: 1 day
Good day, I am proficient in React and backend technologies such as nodejs/php/python. I would be happy to collaborate! The price is symbolic, as I am building new reviews on the platform. To provide a more accurate estimate, please show the scope, but in any case, I am ready to work at a significant discount so that you can verify my skills.
Budget: 25 USD Deadline: 1 day
Hello, I will do it without any problems. I will provide the price and deadlines after I understand the scope of work. $20/hour Git https://github.com/onyx144
Budget: 25 USD Deadline: 1 day
Hello, I am ready to connect the backend with the edits, please write in private messages.
Budget: 100 USD Deadline: 1 day
Good day,
I am a Full-Stack developer, ready to complete everything quickly and efficiently, feel free to contact me.
Budget: 675 USD Deadline: 10 days
Hello,
In addition to handling the frontend changes you mentioned (logo, text, modal updates, additional information display), I can finish the API interface between your React frontend and backend. I am prepared to collaborate with your backend staff on short-term solutions, and I am aware that this is a CSGO Marketplace project.
What I'll need from you before I start:
-Access to the React frontend codebase (Git repository or ZIP)
-API documentation (endpoints, authentication method, request/response formats)
-Access to a development environment (or staging API)
-Brief walkthrough of the current state (what works, what needs connection)
-List of specific frontend modifications (logo file, text changes, modal details)
Budget: 1111 USD Deadline: 11 days
Hello! I am ready to join the project and assist with the backend API integration on the React front.
I understand the task:
— the pages are already designed;
— the backend connection has been partially started;
— the API integration needs to be completed;
— simultaneously make minor adjustments to the front: logo, texts, modals, displaying additional information;
— work in conjunction with the backend developer for quick fixes.
I can do:
— connect the API to existing pages;
— set up requests, loading states, and errors;
— display data from the backend;
— work with authorization/tokens, if provided;
— correctly handle marketplace logic;
— UI adjustments for the logo, texts, and modals;
— final testing of main scenarios.
I work with React, API integrations, REST/GraphQL, Axios/Fetch, Zustand/Redux/React Query.
I am ready to quickly dive into the code, API documentation, and start working.
Budget: 110 USD Deadline: 1 day
Hello, my name is Roman. I will do everything professionally as a full-stack developer. Contact me privately, and I will connect your backend and make adjustments to the front.
Budget: 100 USD Deadline: 1 day
Hello, I have reviewed the task and can implement the required functionality. I am ready to start as soon as you accept it for work.
Budget: 200 USD Deadline: 7 days
Hello! I would be happy to collaborate with you on the project: "Connecting the Backend via API to the React front end"... My experience in web application development is over 15 years. Portfolio: Freelancehunt
Budget: 100 USD Deadline: 1 day
Good afternoon, I am ready to complete it. Message me privately to agree...
Budget: 100 USD Deadline: 1 day
Hello, we are a small team that has been creating and developing digital products for over 4 years. We will approach your specifications comprehensively: we will conduct a code review of the current layout, connect all necessary endpoints, and test the user journey from authorization to purchasing an item. We will make all necessary visual adjustments within 1 day. Our results: freshagro.com.ua, farfieworldwide.com, rivnekolo.com.
Budget: 100 USD Deadline: 2 days
Good day, my colleague and I have been specializing in the development and support of e-commerce platforms for over 4 years. We offer clean implementation of backend requests, error handling, and optimization of skin list rendering. We will quickly make changes to modals and update visual elements according to your requirements. Check out our case studies: drkukharevich.rivne.ua, crave-agency.com.ua, jk-solution.com.ua.
Budget: 120 USD Deadline: 1 day
Hello, Dmitry.
I hope you are doing well.
I am ready to start modify the frontend base on my extensive experience about cs:go, react, and frontend part.
And I am open to coolaboration with a backend developer.
Please contact me any time.
Thanks.
Budget: 200 USD Deadline: 3 days
Hello! I have reviewed your project and am ready to start working. I guarantee high quality and prompt execution.
Budget: 50 USD Deadline: 1 day
Hello! I can complete your task right now, what is the backend written in?
Budget: 100 USD Deadline: 1 day
Hello! I work as a full stack developer on both the backend and frontend. I will complete this task. I can work with APIs and create them.
Budget: 150 USD Deadline: 4 days
Hello. I am ready to take on the task of connecting the frontend to your server. I have practical experience working with React and API integration. I will first make minor adjustments to the interface, such as replacing logos and texts, and correcting modals to immediately finalize the visual part and not get distracted by it. After that, I will move on to a close integration with the backend. The format of collaboration with the backend developer suits me perfectly; it always speeds up the debugging process and allows for quick changes if the data comes in the wrong format. I understand the theme of the CSGO marketplace, and the logic of working with inventory and transactions will not pose any difficulties. Could you let me know if the API documentation is fully ready for use, or will we be describing the endpoints in parallel with the integration?
Budget: 25 USD Deadline: 1 day
Hello! I will develop everything for you according to your specifications.
I work with HTML/CSS/JS and React— I guarantee speed, responsiveness, and clean code.
I am always in touch, meet deadlines, and bring the project to completion.
Deadline: 1-2 days
Ready to start immediately.
We are looking for a layout designer for the entire project, which includes a separate desktop version and an application. The layout must be identical to the mockup. To start, how long will it take and how much will it cost to create such a landing page?
Task Description: I need a ready-made, pre-written template (Boilerplate / Headless CMS) for an online store on the Next.js stack + Node.js with an admin panel. You do not need to write code from scratch, come up with a complex architecture, or create a unique design.The task is to take a ready-made solution, deploy it, change a few background images, adjust the structure to your specifications, and upload the site to hosting.What the result should be (structure of the target page from top to bottom): Main Screen: Your ready-made design. We will simply replace the background image. You need a "Call" button (the call is made directly to the mobile phone, and the "Name/Phone" form is for PC). Service Description: a simple block consisting of exactly three paragraphs of text. Product Showcase: a grid of product cards from your template. The only condition is that the products must have "New" and "Used" labels (and a quick filter). The "Buy" button opens a simple order form (name, phone, selected product). There is no online payment. Video Reviews: a block where videos (links from YouTube) are strictly in one line. It is important that the loading is lazy so that the videos do not slow down the website. Footer: Contacts and links to messengers.Admin Panel Requirements (Node.js): We use the standard admin panel from your template. It should be able to add products (Name, Price, Photo, Description, New/Used labels) and insert links to videos for the reviews block.All requests from the site (calls and purchases) should be directed to a Telegram bot (the notification script must be connected).
Task - website layout. There is a ready-made design, created on a builder, that needs to be converted to WP. This is a small (4-5 pages) bilingual informational website with the possibility of integrating WooCommerce. The site must be optimized for SEO.
Create and design a responsive master template for email newsletters in Stripo (for export to SendPulse).⚙️ What needs to be done:Develop a visual concept and design for blocks (header, banners, product cards, footer).Code a responsive HTML template in Stripo with the ability for further export to SendPulse.Test display in Gmail, Apple Mail, Outlook, and Dark Mode. Requirements:Confident level of Figma and practical experience in coding in Stripo.Understanding of technical limitations of email marketing.Portfolio with implemented email newsletters (e-commerce/fashion).
Task Description An experienced frontend developer or layout designer is needed for the phased update of a large existing website. The site has been operational for many years, contains a significant number of pages, various types of content, forms, tables, and interactive blocks. It uses a proprietary server system, with existing legacy HTML/CSS. A complete replacement of technologies or the content management system is not planned. In the first phase, a new responsive overall template for the site needs to be developed. After the successful completion of the first phase, a sequential update of internal pages is planned. The site name, URL, design mockups, and current output files will be provided to a limited number of candidates after preliminary selection based on portfolio and experience.What is Included in the First Phase The overall visual shell needs to be implemented: header for desktop and mobile versions; main and mobile navigation; utility elements of the header; overall container and page grid; navigation chain ("breadcrumbs"); basic interface elements: buttons, links, input fields; general typography styles with the possibility of phased connection; footer; responsive behavior of the template; compatibility of the new shell with pages that will temporarily remain in the old design. Unique internal blocks of individual pages do not need to be completely redesigned in the first phase.Project Features Large existing site with many types of pages. Existing legacy CSS and outdated HTML markup in places. The new design will be implemented gradually. Simultaneous complete replacement of all pages is not possible. The contractor does not gain access to the server, CMS, and working project. The client will independently integrate the prepared layout. The contractor will be provided with current CSS files, mockups, graphic materials, HTML fragments, and examples of pages as needed to complete the work. Several iterations are expected after the test integration into the real project.Technical Approach The new CSS is expected to be connected over the existing styles with subsequent gradual migration and removal of outdated rules. The following is allowed: creating new CSS/SCSS files; proposing changes to the HTML of the common parts of the template; correcting existing CSS rules that hinder implementation; proposing improvements to the DOM structure; creating new reusable components. Changes to the existing CSS must be submitted separately in the form of: patch/diff file; separate compatibility file; or a documented list of changed rules and selectors. The following must be avoided: uncontrolled use of !important; deeply nested and fragile CSS selectors; binding styles to text or the ordinal number of an element; duplicating all markup separately for desktop and mobile versions; connecting heavy frameworks without prior agreement; global rules that may disrupt the display of pages that have not yet been updated.Quality Requirements The project is designed for further long-term development. A one-time "fitting to a screenshot" is not needed, but rather clean, professional, and maintainable markup. The following is expected: clear component structure; reusable CSS classes; CSS custom properties for colors, sizes, margins, and other design tokens; reasonable specificity of selectors; semantic HTML5 markup; correct hierarchy of headings; absence of unnecessary DOM wrappers; absence of duplicate content that can be indexed; correct use of header, nav, main, section, footer; use of buttons and links according to their purpose; interface accessibility via keyboard; states hover, focus, active, and disabled; absence of horizontal scrolling of the page; correct operation with dynamic content of varying lengths; clear and professionally organized code.SEO and Performance Updating the template should not worsen the technical SEO indicators of the site. The following is necessary: preserve the semantics of the main content; not create separate duplicates of the DOM for mobile and desktop versions without justified need; not hide important content for indexing using JavaScript; not disrupt the hierarchy of headings; not remove existing SEO, analytical, and structural attributes from the provided HTML fragments; minimize additional JavaScript; not use heavy libraries without agreement; provide image sizes and avoid noticeable layout shifts during loading; not allow significant deterioration of Lighthouse and Core Web Vitals metrics after integration. The contractor must understand that quality CSS alone does not fix the DOM structure. If markup changes are necessary for a professional result, appropriate HTML fragments must be prepared and submitted to the client.Responsiveness Layout testing must be performed at least at the following widths: 1440 px; 1200 px; 1024 px; 768 px; 390 px; 360 px; 320 px. Between the control sizes, the interface must also remain correct and functional. Horizontal scrolling of the entire page is not allowed. Exceptions for individual components, such as large tables, must be agreed upon in advance.Result of the First Phase The contractor delivers: New CSS or SCSS along with the compiled CSS. Standalone demo HTML page. HTML fragments of the header, menu, and footer, if the markup has changed. Separate patch/diff of changes to legacy CSS. New SVGs, images, icons, and fonts. Instructions for connection and integration. Description of the CSS structure and components. List of new and changed classes and selectors. Screenshots of the result at control sizes. List of known limitations and discrepancies with mockups. Recommendations for further migration of internal pages.Iterations The cost of the first phase should include: Agreement on the overall structure and desktop version. Responsive refinement of tablet and mobile versions. Correction of issues identified by the client after the first test integration. Additional work outside the agreed first phase will be assessed separately.What to Specify in the Application Please indicate: experience working with large existing websites and legacy CSS; examples of complex responsive layouts; code examples or links to repositories, if available; approach to organizing CSS architecture; experience in gradual design migration without a complete site shutdown;