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Summary Full-Stack React/[login to view URL] Developer Needed for CrewUp Marketplace Platform CrewUp is a B2B web marketplace that connects general contractors with subcontractors. The platform helps construction professionals find work, hire qualified crews, manage opportunities, and build dependable business relationships. We are looking for an experienced Full-Stack Developer to continue building the application within our existing codebase and technology stack. Website: [login to view URL] Project Details - Fixed budget: $100 total — final budget - Timeline: 7 calendar days total - Engagement: Full-stack development - Stack: React, [login to view URL], Supabase, GitHub, Vercel, Stripe, and third-party APIs Please apply only if you are comfortable with both the fixed budget and 7-day timeline. Before You Apply Please review each UI design carefully—at least three times—before submitting a proposal. - General Contractor UI Design: [login to view URL] - Subcontractor UI Design: [login to view URL] Scope of Work You will continue developing CrewUp as a complete B2B SaaS product. Responsibilities may include: - Building and refining front-end pages and responsive user interfaces - Developing back-end functionality, database features, and APIs - Working within the existing React, [login to view URL], Supabase, GitHub, and Vercel environment - Integrating Stripe payments - Improving marketplace features, user flows, and overall user experience - Supporting contractor and subcontractor workflows, profiles, opportunities, messaging, and related platform features - Writing clean, organized, reusable, production-quality code - Reviewing and understanding the existing application before making changes You will be expected to demonstrate that you can understand and work effectively within the current application stack and codebase. Required Experience Please do not apply unless you meet every requirement below: - At least 4 years of professional React experience - Proven full-stack development experience with React and [login to view URL] - Strong experience building modern, responsive web applications - Experience with Supabase or comparable database/authentication platforms - Experience integrating APIs and dynamic application features - Strong understanding of components, props, hooks, state management, routing, and application architecture - Ability to diagnose issues, solve problems independently, and follow detailed instructions - Strong written communication and consistent project updates Clear communication is mandatory. We expect regular progress updates throughout the project. Application Instructions To be considered, include all of the following in your proposal: 1. Your total years of professional full-stack development experience. 2. Links to exactly three live, professional React or [login to view URL] applications you have built. - Include live production links only. - Do not provide more than three examples. - Projects hosted solely on a ".[login to view URL]" domain will not be accepted. - Applicants without three qualifying live projects will not be considered. 3. A brief explanation of how you would improve CrewUp as a contractor/subcontractor marketplace platform. 4. Confirmation that you understand and accept the final $100 fixed budget. 5. Confirmation that you have reviewed the UI designs and agree to the project requirements, communication expectations, and 7-calendar-day deadline. Important This is not a beginner project. We are seeking a developer with proven professional React and full-stack experience who can quickly understand an existing production codebase and continue building the platform efficiently. Applicants may be asked questions about the current application and technology stack to evaluate their experience before hiring.
Project ID: 40636726
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178 freelancers are bidding on average $126 USD for this job

Hi, I have carefully read your project description and understand that you are looking for a skilled professional to continue developing the CrewUp B2B web marketplace platform using React and Next.js. To approach your project, I will thoroughly review the existing codebase and technology stack to ensure seamless integration and enhancement of front-end pages, back-end functionality, and overall user experience. My focus will be on optimizing the marketplace features, user flows, and integrating Stripe payments effectively. In terms of relevant experience, I have over 5 years of professional full-stack development experience, with a strong background in React and Next.js. I have successfully built and deployed multiple live React applications, including . I am confident in my ability to meet the project requirements and deliver high-quality results within the specified timeline. I'd love to discuss your project further and showcase how I can contribute to the success of CrewUp. Looking forward to the opportunity to work together. Best Regards, Rabia Shaikh
$250 USD in 3 days
8.3
8.3

I see you are looking for a full-stack developer to assist with the CrewUp project. Given the scope of your requirements, I am ready to jump in and address the specific JavaScript, design, and integration needs you have outlined to get this platform moving efficiently. With over 15 years of experience, I handle the full technical spectrum from core HTML and CSS to complex PHP and JavaScript functionality. I specialize in building, fixing, and optimizing platforms, so I can ensure the code behind CrewUp is clean, performant, and perfectly aligned with your design requirements. I can complete this work for $65.42 within 1 day. Let's discuss the specific tasks for CrewUp so I can get started on this immediately.
$65.42 USD in 1 day
8.1
8.1

Hello, I’ve read the complete brief and understand that CrewUp is an existing B2B marketplace that needs a developer who can quickly understand the current codebase and continue development without unnecessary rebuilding. I’ll prioritize reusable components and clean data flows rather than adding one-off code that becomes difficult to maintain. I would also pay close attention to marketplace-specific areas such as profile completeness, search/filtering, opportunity status, messaging, notifications, permissions and the separation between contractor and subcontractor experiences. I also understand the requirement for regular progress updates and clear communication throughout the project. I have reviewed the project requirements and UI direction and am comfortable working within the existing stack and codebase. I’m ready to begin with the existing application review and prioritize the highest-value items so measurable progress is delivered within the 7-day window. Best regards, RAHEEL
$75 USD in 7 days
8.1
8.1

Hello, I checked your "Full-Stack Developer Needed for CrewUp" project description, it looks like the focus is on delivering a clean, responsive website that works well across all devices. I prefer understanding the expected layout and user experience first, then building pages that closely match the design while keeping the code organized and easy to maintain. Feel free to share the design or current website, and I'll suggest the best implementation along with a realistic timeline. Final timeline and cost will be confirmed in chat after a complete understanding and documentation of the project expectations in detail.
$50 USD in 2 days
7.5
7.5

Hi! My name is Marjan and I'm here to offer you my services as a skilled applicant with over a decade of experience working on Freelancer.com. l believe I am the best fit candidate for this project due to my extensive experience; I would like to have a discussion to get to know that we both are on the same page. Once the scope will be locked, I will start working on it right away.
$200 USD in 7 days
7.1
7.1

Hello, I am a skilled Full-Stack Developer with expertise in Graphic Design, Website Design, JavaScript, Full Stack Development, API Integration, and Next.js. I understand the requirements of the CrewUp project and am confident in my ability to continue building the application within the specified technology stack. - MY WORK STATS: ✨ https://www.freelancer.com/u/XanvraTECH I suggest a follow-up discussion to further delve into how I can contribute to enhancing the CrewUp platform. Best regards, Warda Haider
$75 USD in 4 days
6.8
6.8

I am a full stack developer with extensive experience building marketplaces using React, Next. js, and Supabase. I have successfully integrated complex API systems and designed intuitive user interfaces for B2B platforms similar to CrewUp. My expertise in the T3 stack and PostgreSQL ensures your application will be scalable, secure, and high performing. I can manage both the frontend design and backend logic to deliver a seamless experience for your users. I have worked on several SaaS products where I handled authentication, real time data syncing, and responsive layouts. I am ready to start immediately and can provide high quality code that meets your specific technical requirements. Please let me know if you would like to see my portfolio of previous Next.
$250 USD in 7 days
6.3
6.3

Hello, I hope this message finds you well. I have thoroughly reviewed the project requirements for CrewUp and am confident in my ability to contribute effectively. With extensive experience in Website Design, Graphic Design, JavaScript, Full Stack Development, and HTML, I am well-positioned to support your objectives. In terms of execution approach, I emphasize structured planning, clean implementation, and rigorous testing to ensure optimal results. My portfolio showcases successful projects that highlight my expertise in this domain. Considering the specifics of the CrewUp project, could you please provide further insights into your top priority or key business goal to streamline our scope alignment? I am keen on discussing this project further with you to finalize the details smoothly. You can view my portfolio here: ⭐⭐ https://www.freelancer.com/u/CodeAnchors ⭐⭐ Best regards, Muhammad Anas Khan
$75 USD in 4 days
5.8
5.8

Hi, I can help you in building your B2B marketplace for you according to your requirements and in your current stack. I'm ready to start working now. Lets chat and share some details.
$50 USD in 7 days
5.9
5.9

Hi, I reviewed Full-Stack Developer Needed for CrewUp and it’s a strong match for my experience in JavaScript, HTML, Full Stack Development. I can handle the work from implementation through testing and final delivery, with a focus on quality, reliability, and clear communication. I’ve worked on similar projects and can share relevant examples if needed. I’m available to start soon and can provide a clear plan once we confirm the scope. Happy to discuss the details and get started. Best regards, Arslan Shahid
$50 USD in 7 days
5.7
5.7

Hello , I just saw your project regarding Full-Stack Developer Needed for CrewUp. I've been building scalable web apps and custom integrations for a while, and this fits right into my wheelhouse. I'm a full-stack developer with hands-on experience in AI (custom LLMs, RAG, workflow automation), SaaS architectures (React, Node.js), and Web3 integrations. Instead of just delivering basic scripts, I focus on building secure, production-ready solutions that actually scale. I've launched multiple real-world products and know how to avoid the common technical pitfalls in these areas. Let's have a quick chat so we can go over your exact needs. I can share some of my recent work so you can see the code quality firsthand. Cheers, Emre
$50 USD in 34 days
4.6
4.6

UNDERSTANDING THE EXISTING CODEBASE IS CRUCIAL FOR SUCCESS I'd love to help elevate CrewUp into a more efficient marketplace. With over four years of full-stack experience, I have successfully developed and enhanced applications using React and Next.js. I’ve reviewed the UI designs thoroughly and see opportunities for smoother user flows and enhanced messaging features. What specific challenges have you faced with the current platform? I can confirm my acceptance of the $100 fixed budget and the 7-day timeline. The worst-case scenario of reaching out is a free consultation to discuss this further. Regards, Johan
$50 USD in 14 days
2.5
2.5

Hello, I'm available to start immediately. I reviewed Full-Stack Developer Needed for CrewUp and have a clear understanding of what you're looking to achieve. With hands-on experience in Website Design, HTML, I focus on delivering high-quality, reliable solutions that are clean, efficient, and built to last. My priority is clear communication, meeting deadlines, and ensuring the final result matches your expectations from start to finish. I'd be happy to discuss the project in more detail and answer any questions you may have. Best regards, Noordine
$100 USD in 1 day
2.2
2.2

Hi, I read your project carefully and I can deliver exactly what you need. I can start immediately and show you the first preview in a few hours. Let’s discuss the details.
$55 USD in 4 days
0.6
0.6

Every great project begins with a simple conversation, and this could be the one that brings your idea to life. I have over 5 years of professional full-stack development experience, specializing in React and Next.js. You can find three live projects I have built at [Project 1 Link], [Project 2 Link], and [Project 3 Link]. To enhance CrewUp, I would focus on streamlining user workflows for contractors and subcontractors, integrating advanced search features, and implementing analytics dashboards for better decision-making. These improvements will foster stronger relationships and increase platform usability. I fully understand and accept the fixed budget of $100 and the 7-day timeline. I have reviewed the UI designs multiple times and am ready to meet your communication expectations while diving into the existing codebase. Let’s work together to elevate CrewUp into a leading marketplace platform.
$50 USD in 7 days
0.0
0.0

Hi js, and Supabase is right up my alley. The technical challenge here is seamlessly integrating and enhancing the existing front-end and back-end functionalities while ensuring smooth Stripe integration for payments. js for its scalability and Supabase for its real-time database capabilities to boost the overall user experience. js environment, most notably a subscription-based service where enhancements led to a 40% increase in user engagement. Given your need for a seasoned developer who can jump into an established codebase, my experience with code review and enhancement will be valuable. CrewUp's mission to facilitate connections in the construction industry is commendable, and I'm excited about the opportunity to contribute. I can help streamline your platform's features and improve the user interface, ensuring it’s both functional and intuitive. I'm ready to dive into the current stack, guide you through my approach, and discuss how I can add value to the CrewUp project. Thanks, Shammi
$75 USD in 1 day
0.0
0.0

Hey, Full-Stack React/Next development expertise here, having successfully delivered several projects for clients in the past year. With 14 years of full-stack experience under my belt, I've honed my skills to deliver top-notch results. My last similar project was completed within two weeks and later extended for six months by the client. I am available to start immediately for this project at USD 90. Intrigued by the details of your existing codebase - could you provide more information about it? Raphael
$500 USD in 3 days
0.0
0.0

I recently helped a similar marketplace platform enhance its user experience and streamline its operations using React and Next.js. I will help you refine CrewUp’s features to ensure a clean, professional, and user-friendly interface. A free consultation and fast project planning can get us started immediately. I noticed the emphasis on improving user flows and overall marketplace functionality. My experience with integrated payment systems and seamless API connections aligns perfectly with your needs. With over four years of full-stack development expertise, I can begin right away and deliver a quick action plan that meets your timeline. What payment integration options are you considering for CrewUp? Regards, Quinlann.
$50 USD in 7 days
0.0
0.0

Hi CrewUp is an exciting platform connecting contractors and subcontractors. js requires precise integration of components like props and hooks on a tight schedule. Using Supabase for backend improvements, along with Stripe for payment integration, will enhance the user flow seamlessly. js, and Supabase in SaaS products focused on contractor-subcontractor interactions, boosting user engagement significantly. Your dedication to improving marketplace features and user flows truly stands out. It's clear you've put a lot of thought into industry needs, and I'm ready to align with your project's timeline. I can help refine CrewUp within your existing codebase. Let's dive into the specifics, and I'll walk you through my approach to address the challenges you're dealing with. Thanks, Oswaldo
$75 USD in 7 days
0.0
0.0

CrewUp already has the core marketplace concept in place; the real challenge is continuing the existing codebase without breaking the GC/SC separation, Supabase permissions, or the connected user flows. I’d start by auditing the current implementation against the provided UI and identifying what is already functional versus what still needs completion. From there, I’d focus the 7-day window on the highest-impact production flows rather than treating isolated UI screens as finished features. I understand and accept the $100 fixed budget and 7-calendar-day deadline, with regular progress updates throughout. Before starting, I’d like to confirm which parts of the current codebase are already production-ready and which are still incomplete.
$100 USD in 7 days
0.0
0.0

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