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We are building a complete B2B2C platform for CompleetSanitair, a Dutch bathroom and sanitary-products company. The application combines CRM, lead management, appointment planning, quotations, product configuration, webshop, orders, purchasing, logistics, payments and customer service in one system. Sales representatives use the platform during home consultations and showroom appointments to create bathroom designs, configure products and prepare complete quotations. The product database contains hundreds of thousands of sanitary products, variants, colours, dimensions, prices, images, accessories and technical specifications. Customers can review quotations, request changes, approve and sign digitally, make payments and track their orders. Orders may contain products from multiple suppliers, each with different delivery times, purchasing processes and service procedures. Employees must be able to manage suppliers, purchase orders, deliveries, returns, exchanges, partial credits, service cases and customer communication. Installers and business partners receive their own portal for customers, projects, quotations and orders, including white-label possibilities. AI is used to improve product data, identify missing or incorrect information, analyse supplier documents and support customer communication. The existing platform is built with React/TypeScript, Supabase, GitHub and Vercel. We are looking for experienced full-stack developers who can analyse the existing system, improve the architecture and complete the platform without breaking existing functionality. The final goal is one scalable system that manages the entire process: from the first lead and bathroom consultation to ordering, delivery, installation and aftercare.
Project ID: 40606612
170 proposals
Remote project
Active 2 days ago
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170 freelancers are bidding on average €13,383 EUR for this job

With over a decade of experience in full-stack development and a strong background in web design, I'm confident that I can bring significant value to your CompleetSanitair project. My expertise with CRM systems aligns perfectly with your need for a comprehensive platform that synchronizes various B2B2C processes. Moreover, my proficiency in HTML, PHP, and website design ensures that I am well-equipped to handle the intricate product database your system entails. My focus has always been on building projects that are both scalable and user-friendly, a key requirement for a platform like yours where different stakeholders will interact seamlessly. What sets me apart is my adaptability to work with multiple tech-stacks, as seen from my experience with React/TypeScript - which is similar to what you're already using with your existing platform. This makes the transition seamless while providing the crucial input to improve the architecture without breaking any existing functionality. Beyond coding, I also bring an analytical mindset to identify pain points in your existing system and leverage Artificial Intelligence tools to streamline data management and analysis, enhancing overall efficiency.
€13,500 EUR in 90 days
9.6
9.6

With over a decade of experience in full-stack architecture and high-scale systems, I understand CompleetSanitair's goal of building a comprehensive B2B2C platform for their Dutch bathroom and sanitary-products company. My background in scaling platforms for over 1 million users and handling complex FinTech systems directly applies to the challenges of integrating CRM, lead management, product configuration, webshop, and more into one seamless system for your project. One strategic insight I can offer is to prioritize modular architecture design to ensure scalability without compromising existing functionality. My past success in developing Telegram Mini Apps that served over 1 million users showcases my ability to handle complex projects like yours with ease. I encourage you to take the next step in discussing the roadmap for your project. Feel free to reach out to me to explore how we can enhance the architecture of your platform and deliver a scalable solution that fulfills CompleetSanitair's needs seamlessly.
€16,000 EUR in 75 days
9.1
9.1

Hi, This project is more than a website build; it’s a core business platform where CRM, quoting, ordering, supplier flow, and aftercare all depend on one another. The main risk is breaking data flow between lead, order, and product systems, so I would begin with a full review of the architecture and data model. I’d start by auditing your React/TypeScript, Supabase, and deployment setup, then map the full journey from consultation to quotation, approval, payment, order handling, and service cases. From there, I’d prioritize the highest-impact areas first: product configuration, quotation logic, supplier-based order handling, and admin workflows that reduce manual work and errors. Relevant experience includes working with React, TypeScript, Supabase, CRM-style workflows, quoting/order systems, and safe incremental improvements to live applications.
€10,007 EUR in 18 days
9.4
9.4

Hi there, We understand you're looking to enhance and complete a comprehensive B2B2C platform for CompleetSanitair, integrating CRM, lead management, and e-commerce functionalities, among others. Our team at Webbook Studio has experience with similar complex projects, such as developing a learning platform website for children using PHP, WordPress, and custom design, and creating an online shop for a Scandinavian fashion brand with WooCommerce and custom design. With 17 years of experience and a 5.0 rating across 458 reviews, we're confident in our ability to improve the architecture of your existing React/TypeScript platform and ensure scalability. What specific areas of the platform would you like us to focus on initially to ensure a seamless integration with the existing system? Feel free to message us to discuss the details! — Webbook Studio
€10,000 EUR in 50 days
9.3
9.3

Hi — Elias here from Miami. I see you’re developing a B2B2C platform for CompleetSanitair. This project aims to streamline the connection between suppliers and consumers, enhancing user experience and operational efficiency. A common issue in systems like this is ensuring scalability and maintainability. As user interactions grow, the platform must handle increased traffic without performance dips. Integrating various user roles and workflows adds complexity, which needs careful planning to avoid bottlenecks. My approach would center around a modular architecture using PHP and a reliable database like Supabase. This would allow for easy updates and feature additions without disrupting existing functionalities. By prioritizing clear API integrations and efficient state management, we can future-proof the system. I've successfully built similar platforms where user roles and permissions were critical, ensuring seamless interactions between different stakeholders. A few questions to better understand the scope: Q1 – What specific user roles do you envision for the B2B and B2C components? Q2 – Are there any existing systems or integrations that we should consider for this platform? Q3 – What are your long-term scaling expectations for user growth? Happy to go through the details and suggest the best technical approach. Looking forward to hearing from you.
€15,000 EUR in 35 days
8.5
8.5

Good to see this project, I will deliver the complete CompleetSanitair platform: CRM, appointment planning, product configurator with your hundreds of thousands of sanitary SKUs, multi-supplier order flow, and the white-label installer portal, all within your existing React/TypeScript, Supabase, and Vercel stack. On a similar multi-supplier B2B2C build, I started with a full architecture audit before writing any new code. That approach kept every existing workflow intact while new modules went live incrementally. Questions: 1) How far along are the quotation signing and payment flows today (functional, partial, or not yet started)? 2) For the AI layer (product data cleanup, supplier doc analysis), do you have a preferred provider like OpenAI or is that open? Looking forward to potentially working together. Thanks, Kamran
€11,428 EUR in 30 days
8.6
8.6

You're building Full-Stack Dev for Dutch B2B2C Platform, where the real delivery risk is usually in the workflow details, not just the feature list. I have handled similar systems where the important part was turning a broad brief into a reliable working version. My approach would be to first isolate the highest-risk workflow in the brief, then deliver a small working milestone that proves the architecture before expanding the rest. For this project, I would focus especially on: - core workflow risks and acceptance criteria - integration points and edge cases - milestone planning and handover clarity If helpful, I can outline the first milestone around the riskiest part of the build before we start. Best, Dr. Syafiq
€15,000 EUR in 21 days
7.3
7.3

As a full-stack developer with over 15 years of experience, your project for CompleetSanitair aligns perfectly with my areas of expertise. Having successfully delivered numerous B2B2C applications, I'm confident in my capability to analyze, improve, and expand upon your current stack to create a scalable, all-encompassing solution matching your project vision. My skills include but aren't limited to: expert-level proficiency in React/TypeScript, the backbone of your existing platform. Plus, my sound knowledge of Supabase, GitHub and Vercel can be handy in managing the database with hundreds of thousands of products and improving your AI system for better product data accuracy. Over the years, I've provided web solutions to diverse industries including logistics which makes me well-versed with complex supply chain processes - a critical requirement for ordering and delivery coordination in your project. Your project is about unifying various functionalities; lead management, appointment planning, quotations webshop & more into one system. My multi-domain expertise including CRM integration, lead generation technology & white-label portal development ensures that every component will flow seamlessly within this unified structure. With a solid track record of client satisfaction – 750+ to be precise – you can rest assured that I will not just deliver on time but also keep you updated throughout the journey adding an extra layer of transparency in communication.
€10,000 EUR in 30 days
6.2
6.2

Hello, Is the current team open to adopting new tools or sticking strictly with the existing stack? Also, do you already have design wireframes for the new features? Excited about your comprehensive platform! I'll ensure improvements won't disrupt existing functionality while enhancing the architecture. Handling multiple supplier processes seems key; I'll focus on seamless integration across all channels. Let's chat to dive into details and align our next steps. Looking forward to your message!
€10,000 EUR in 10 days
5.9
5.9

Hi, I’m interested in helping complete and scale the CompleetSanitair platform. This is not just a webshop project; it is a full business operating platform connecting sales, CRM, product configuration, quotations, ordering, purchasing, logistics, customer service, and partner workflows. I have experience building full-stack platforms with React/TypeScript, backend APIs, database-driven systems, authentication, dashboards, and complex business workflows. I can work with your existing stack (React, Supabase, GitHub, Vercel), first analyzing the current architecture, identifying bottlenecks, and then improving or extending the system without breaking existing functionality. My approach would be phased: * Audit current platform architecture and database structure * Improve scalable product catalog handling for large datasets * Complete CRM, lead, quotation, approval, payment, and order workflows * Build supplier, logistics, service, and partner portal functionality * Add AI-assisted product data validation and operational automation * Perform testing, optimization, documentation, and handover I focus on maintainable architecture, clean code, and business logic that can support long-term growth rather than short-term fixes. I’d be happy to review the existing platform and discuss the highest priority modules for the first delivery phase.
€15,000 EUR in 120 days
6.0
6.0

Hi I understand you need experienced full-stack support to evolve an existing B2B2C platform into a reliable end-to-end system without disrupting current functionality. I can help analyze the existing React/TypeScript and Supabase architecture, improve scalability, and continue development across CRM, quotations, product management, orders, portals, and customer workflows. My approach would focus on understanding the current codebase first, identifying bottlenecks, improving structure where needed, and delivering new features with clean, maintainable implementation. I have experience building complex web applications with dashboards, role-based portals, integrations, databases, and scalable backend systems. I’m also comfortable working with AI-driven improvements such as data quality automation, document analysis, and workflow enhancements where they add real business value. I’d be happy to review the current platform, discuss priorities, and suggest a practical roadmap for completing the system. Best Regards, Fizza Nadeem K
€10,000 EUR in 10 days
6.2
6.2

Hello, I am a full-stack developer with extensive experience in React/TypeScript, Supabase, and Vercel. I will analyze your CompleetSanitair platform and improve its architecture to help you complete the platform while maintaining existing functionality. My approach will ensure the system is scalable and stable, and capable of handling the entire B2B2C workflow, from lead generation, bathroom consultations, product configuration, and quoting to ordering, delivery, installation, and after-sales service. I will review product databases, APIs, and portals for sales representatives, installers, and partners to ensure smooth operations. We can implement features such as AI-based product data verification, supplier documentation analysis, and enhanced customer communication while maintaining system performance and maintainability. I am confident that following our step-by-step plan will yield excellent results. I can provide necessary examples via chat. Thank you for reviewing my proposal. I look forward to your reply.
€10,000 EUR in 7 days
5.5
5.5

Hi there, we have recently completed a similar project and would love to share some references. Your B2B2C platform for bathroom products sounds right up our alley, and we would love to exceed your expectations. We specialize in enhancing full-stack applications, utilizing React, TypeScript, and Supabase to create integrated solutions. Our focus will be on: - Analyzing your existing architecture for improvements - Ensuring seamless functionality across all modules - Developing a scalable system that streamlines processes Each project is treated with the utmost respect, and based on what you mentioned, here is how we would approach the project: - Conduct a thorough assessment of the current platform - Implement enhancements to improve performance and user experience - Integrate AI features for data optimization and customer support While we might be new to Freelancer, we have over 9 years of experience off-site, and I truly appreciate you taking your time to review our proposal. I would love to discuss this project more. Kind regards, Trichelle
€12,000 EUR in 7 days
5.6
5.6

Hi, I reviewed your project: Full-Stack Dev for Dutch B2B2C Platform. I can help you build a practical AI-powered solution with secure API integration, clean backend architecture, automation workflows, database design, and a production-ready admin/dashboard system. My experience includes AI assistants, OpenAI/LLM integrations, RAG/knowledge-base workflows, Laravel/PHP, React, Node.js, APIs, databases, and deployment. Please message me so I can confirm the workflow, data sources, integrations, and success criteria before we start. Portfolio: https://www.freelancer.com/u/irfanui Regards, Mohammad 4th Dimension Partners
€16,500 EUR in 10 days
5.8
5.8

Hello, We will build out your CompleetSanitair platform across CRM, product configuration, quoting, webshop, purchasing, logistics, and partner portals within your existing React/TypeScript and Supabase stack. With hundreds of thousands of product variants, the database layer needs careful indexing and caching. We will structure the catalog using composite filters (colour, dimension, supplier) with materialized views so sales reps get instant results during home consultations. For the multi-supplier order flow, we will split each order into supplier-specific purchase groups with independent delivery tracking. A couple of quick things to confirm: 1) How is the product data currently structured in Supabase (single table, relational, or JSON documents)? Looking forward to discussing further. Best regards, Faizan
€11,187 EUR in 30 days
5.6
5.6

The biggest risk here isn't adding new features—it's evolving a platform that already spans CRM, quotations, purchasing, logistics, and customer portals without introducing regressions between those workflows. I'd start by mapping the existing architecture and data flow, then work feature by feature with clear boundaries so improvements don't ripple into unrelated parts of the system. With React/TypeScript and Supabase, I'd pay close attention to database relationships and row-level security policies, since those tend to become fragile as more user roles like sales reps, installers, partners, and customers are added. I'd also look for opportunities to reduce duplicated business logic so pricing, order status, and supplier handling stay consistent across the application. One question that would affect the approach: is the current bottleneck architectural debt, unfinished modules, or performance with the growing product catalog? I'm interested in contributing where those improvements will have the biggest long-term impact.
€12,000 EUR in 45 days
5.4
5.4

I’ve architected and scaled full-stack systems with React/TypeScript, Supabase, and Vercel before—this matches the stack directly. I’ll start by auditing the Supabase schema and React components to identify bottlenecks, then refactor the API layer to handle multi-supplier order flows and white-label portals. Next, I’ll isolate the CRM/lead management logic from the webshop to prevent session conflicts during digital signing. AI modules for product data validation will plug into Supabase’s edge functions to avoid throttling. Existing functionality stays intact via feature flags in GitHub Actions; deployments hit Vercel’s preview channels first. I can start immediately. Thanks, Andrii
€15,000 EUR in 30 days
5.0
5.0

As a seasoned web and mobile app developer, I bring a wealth of experience to your Dutch B2B2C platform project. With more than 14 years in the field, I've successfully completed 416 projects spanning various industries, effectively building eCommerce, CRM, and UI/UX platforms. My skills in full-stack development, employing technologies like React.js, MongoDB, and Node.js coupled with my knowledge of managing databases can lend itself well to the scale and scope of your project. One thing that sets me apart is my ability to analyze existing systems and improve their architecture without disrupting functionality. For your platform's integration process that demands precise structuring of multiple suppliers with varying delivery times and purchasing procedures, this skill proves essential. Moreover, I'm conversant with using AI to enhance product data and streamline customer communication - vital for managing hundreds of thousands of sanitary products in your system. Finally, a testament to my commitment is the high priority I place on client satisfaction. This aligns well with your need for a tailored IT solution; at each step, I aim to ensure the technology used perfectly fits the unique requirements of your business. By choosing me for this project, you're selecting not just a coder but a professional dedicated to helping companies like yours thrive through efficient technology solutions that streamline every facet of the business.
€10,000 EUR in 15 days
5.0
5.0

⚠️ If you're not happy, you don’t pay. ⚠️ Hi, Thank you for checking my proposal and sharing the detailed project brief. I can enhance your B2B2C platform using React, TypeScript, and Supabase with a scalable, user-friendly design. I will deliver: • Comprehensive CRM integration for seamless lead management • Advanced product configuration enabling dynamic quotes • Efficient appointment scheduling and customer service modules • Robust payment processing and order tracking features • Supplier management tools for diverse purchasing processes • White-label portals for installers and partners You will also receive: • Detailed documentation and training for your team • Ongoing support to ensure smooth transitions and updates I am confident I can execute your vision professionally and efficiently. Looking forward to discussing timeline and next steps. Best regards, Chirag Pipal
€10,000 EUR in 7 days
4.8
4.8

Hi, I can complete and harden your React/TypeScript and Supabase B2B2C platform without breaking live flows, and I see your 10k to 20k EUR budget range. I migrated a multi-supplier ecommerce and quoting system with 80,000 SKUs to React and Supabase and delivered a zero downtime go live. I will analyse the existing codebase, stabilise realtime sync and product ingestion, consolidate product variant models, and implement order orchestration so lead times per supplier, partial deliveries, returns and service cases work in one consistent flow. I will preserve the sales rep quotation UX while adding supplier portals, white label hooks and AI assisted data cleaning that identifies missing specs. If you share repo access I will deliver a written list of architecture issues and eight prioritized quick wins within 72 hours, free and no commitment. Happy to jump on a quick chat. Ali Zain
€15,000 EUR in 7 days
4.6
4.6

Hoorn, Netherlands
Member since Jul 26, 2026
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