Custom CRM/ERP Web Application Development

@ukroficer

✅ Hello, You need a custom Spanish CRM/ERP, not Odoo, built around your full flow from Meta Lead Ads to WhatsApp, contracts, installations, invoices, commissions, and warranty history. We would start with a Phase 1 MVP around lead intake, sales pipeline, full customer timeline, documents/signatures, and profitability data structure so Aquantia owns a scalable base from day one. - Backend: NestJS + PostgreSQL; audit logs, backups, exports, and role-based access. - Frontend: React SPA for fast internal CRM use on mobile and desktop. - Core MVP: Meta leads, auto WhatsApp, pipeline, timeline, contracts, installs, invoices. - Deploy on your VPS/AWS with full source, DB access, docs, and handover. We are Webcapitan, a Ukraine studio with 8+ years, Preferred Freelancer, and 5★ across 580+ reviews. Do you want official WhatsApp Cloud API and e-sign via provider like DocuSign/Signaturit, or a lower-cost alternative? Is this greenfield, or do you already have any customer/sales data that must be imported and mapped? Please let me know your thoughts. Looking forward, Roman

@diektech

Hi — Elias here from Miami. I understand you're looking to develop a custom CRM/ERP web application focused on sales, contracts, installations, and automation. This system aims to streamline operations and enhance productivity, which is crucial for your business. The real challenge often lies in ensuring scalability and maintainability. What usually matters most here is how well the system adapts to growth and changing workflows. A common issue in systems like this is managing complex integrations and user permissions effectively. The tricky part is usually ensuring that automation logic doesn't create bottlenecks. My approach would focus on building a modular architecture for easy updates and future expansions. I'd prioritize clean code, thorough documentation, and robust API development for seamless integration with existing tools. I've worked on similar platforms where user roles and workflows were critical, ensuring user satisfaction and operational efficiency. A few questions to better understand the scope: Q1 – What specific user roles do you envision for the system? Q2 – Are there any existing systems you want to integrate with? Q3 – What are your expectations for scaling the application? Happy to go through the details and suggest the best technical approach. Looking forward to hearing from you.

@webbookstudio

Hi Aquantia, We understand you're looking for a custom web-based CRM/ERP system tailored to your business workflow, integrating Meta Lead Ads, automatic WhatsApp messages, and electronic signatures, among other features. At Webbook Studio, we have experience in building complex web applications, including CRM and ERP systems, using technologies like JavaScript, Node.js, React.js, and MySQL. For example, we've developed a custom CRM system for a digital agency and an e-commerce platform with integrated payment systems. Our team is confident in delivering a scalable and secure solution that meets your needs. We'll provide a custom web application with a modern, simple interface, mobile responsiveness, and secure authentication. Can you please elaborate on your expected timeline for Phase 1 and how you envision the system's scalability as your company grows? Feel free to message us to discuss the details! — Webbook Studio

@shrec

Hi, I understand you need a custom CRM/ERP built around Aquantia’s actual workflow, rather than adapting an existing ERP. For Phase 1, I’d propose €750 fixed, with milestone-based delivery. This would cover the CRM pipeline, customer profiles and activity timeline, Meta Lead Ads integration, automatic WhatsApp messaging, contracts and e-signatures, financing, installations, invoicing, commissions, warranty tracking, dashboards, roles and permissions, responsive Spanish UI, and deployment. I’d use React, Node.js, and MySQL for a clean and scalable architecture. Meta leads can be integrated through Meta webhooks/API, while WhatsApp would use the official Business API or compliant provider. E-signatures can be handled through a suitable external provider, with signed documents stored in the CRM. I’d estimate 6 to 8 weeks for Phase 1, depending on the final API requirements. Hosting should initially be around €20 to €50/month, with WhatsApp, e-signature, and other third-party usage charged separately. I’ll be transparent that I cannot provide a previous CRM demo from the information available here, so I won’t claim work I cannot verify. You would receive full source code, database, admin access, deployment documentation, and a maintainable architecture for future developers. Best, Ivane

@ykarora26

With extensive experience in developing custom web applications, particularly in CRM/ERP systems, I understand Aquantia's need for a tailored solution to manage their sales, contracts, installations, and automation processes. My past projects involved building similar systems for seamless workflow integration. How critical is real-time data synchronization across various stages of the workflow for optimal efficiency and accuracy? Regards, Yogesh Kumar

@corpmember29

Hello, Custom CRM/ERP {{{ I HAVE CREATED SIMILAR CRM/ERP, SALES PIPELINE, AUTOMATION AND BUSINESS MANAGEMENT SYSTEMS BEFORE AND I CAN SHOW YOU }}} I read your requirements carefully and understand the complete Aquantia workflow from Meta Lead Ads → CRM → WhatsApp → Sales → Contracts → Financing → Installation → Invoicing → Commission → Warranty/Maintenance. I have 10+ years of experience in full-stack development and can build this as a clean, scalable custom web application rather than using an existing ERP. I can implement Meta Lead Ads integration, compliant automatic WhatsApp messaging, customizable CRM pipeline, click-to-call, complete customer activity timeline, e-signatures, financing, installation management, invoicing, commissions, warranty/maintenance and profitability dashboards. I would use Agile methodology and develop the system in well-defined phases with regular testing and feedback. The architecture will be secure, responsive, role-based and designed for future expansion. You will receive the complete source code, database access, administrator credentials, deployment documentation and full ownership of the custom development. I will also provide 2 years of free ongoing support after delivery and assist from development through deployment. I eagerly await your positive response. Thanks

@Herculesz

Hi, This project involves building a custom CRM/ERP system with a full stack JavaScript environment, which requires careful architecture to ensure modularity and maintainability. The main engineering risk lies in integrating complex business logic with scalable, reliable data management and responsive UI interactions. I usually structure such systems by separating backend API logic from frontend state management and database access layers, ensuring clear boundaries and testability. My experience with Custom Feature Development & Integration involved similar challenges of enhancing UI and database layers in live systems, which aligns with your need for tailored CRM/ERP workflows. I typically design data synchronization mechanisms that maintain consistency between MySQL and React state, while providing robust API endpoints for CRUD operations. Systems like these must be designed for long-term production use, with clear documentation and automated testing to reduce maintenance overhead. I can start by outlining the API and database schema design, mapping key CRM/ERP workflows, and reviewing frontend integration strategies. Thanks, Hercules

@extreamcode

Hi Aquantia, I can see the real pressure here isn’t just building a CRM/ERP , it’s making every lead, call, contract, signature, installation, and invoice live in one clean system your team can trust for years. I’ve built custom PHP/MySQL web apps, CRM workflows, dashboards, automation, and role-based systems, so I can structure Phase 1 around your actual sales-to-installation flow instead of forcing you into Odoo. I’d implement the system with a scalable backend, secure authentication, Spanish UI, audit history, document generation, Meta Lead Ads sync, compliant WhatsApp API integration, contract PDFs, e-signature flow, invoicing, commissions, and management dashboards. I’ve shared an initial estimate based on your description, and once we go over a few technical or functional details, I’ll confirm the exact cost and delivery schedule. Could we start by mapping the exact Meta fields, WhatsApp provider preference, and signature provider you want to use? I’d also like to confirm user roles, invoice format requirements, and whether you need multi-company support later. Looking forward to your reply so we can finalize the exact plan. Which electronic signature provider or legal workflow would you like to use for signed contracts and delivery documents? Best regards, Asad

@Hubready

Hello!, I am a Florida-based senior software engineer, and this is exactly the kind of CRM/ERP work I take seriously. Your biggest pain point is usually not the coding itself, but making sure sales, contracts, installations, and automation all connect cleanly without missed steps or duplicate data. I’d handle this in phases: 1. Review your workflow and define the core logic first 2. Build the CRM/ERP foundation with roles, records, and status tracking 3. Add automation for follow-ups, contract steps, and installation updates 4. Test everything end to end so it stays reliable as you grow I build practical systems that people can actually run their business on, not just pretty dashboards. I pay close attention to details because in a project like this, one small workflow gap can create bigger issues later. Relevant work includes: - a sales pipeline and contract tracker for a service company - an internal ERP dashboard for scheduling and operations - a React/Node CRM for lead management and reminders - a workflow system for field service coordination A few quick questions: 1. What exact stages do you want for sales, contracts, and installations? 2. Do you need email, SMS, or internal notification automation? 3. Will field staff need mobile-friendly access? If you want someone who will really care about the workflow and deliver it cleanly, I’m ready to help. -James

@giaphung2k1

Hello I specialize in building bespoke, scalable CRM/ERP systems tailored to specific business workflows, avoiding the bloat of generic platforms like Odoo. Using a modern stack (React/Node.js or Python/FastAPI), I will architect a clean, intuitive solution that streamlines your sales, contracts, and installation tracking for Aquantia. My focus is on high-performance automation and a seamless user experience. Could you share a bit more about your priority features for the Phase 1 MVP? Best regards, Giáp Văn Hưng

@installerpoint

Hi,I can build Aquantia’s custom CRM/ERP from scratch with an API-first, scalable architecture covering Meta Lead Ads, automatic WhatsApp messaging, sales pipeline, activity timeline, contracts/e-signatures, financing, installations, invoicing, commissions, warranty, maintenance, and profitability reporting. I recommend Node.js + React.js + MySQL for a maintainable and extensible system. I’ll implement proper role-based access, audit history, responsive UI, secure authentication, backups, exports, and clean modular code so future automation and integrations can be added easily. I’ll provide full source code, database ownership, admin access, deployment documentation, and ensure the system is not dependent on me for future maintenance. I’m ready to discuss the workflow and provide a fixed Phase 1 quote, timeline, and details of any third-party/API costs. Best regards ADEEL

@flapjakc

Hola, soy Mateo, desde Toronto. El punto que mas define la arquitectura es poder abrir el perfil de un cliente anos despues y ver la historia completa desde el lead hasta el ultimo mantenimiento, eso significa una tabla de eventos inmutable desde el primer dia, nunca un log sobreescribible. Dado el alcance real, esto excede el presupuesto publicado. Propongo Fase 1 por 3.500 EUR: integracion Meta Lead Ads, pipeline de ventas, perfil de cliente con timeline, contratos con firma electronica, ordenes de instalacion basicas. Facturacion y comisiones pasarian a Fase 1B. Stack: Node.js/Express, React, MySQL con patron de tabla de eventos. Hosting estimado 15-25 EUR/mes. WhatsApp Business API tiene costo por conversacion segun volumen. Firma electronica via proveedor espanol (ej. Signaturit) con costo por documento, ambos se los detallo con cifras reales antes de decidir. Meta Lead Ads conecta via webhook con deduplicacion por telefono/email antes de crear el lead, disparando WhatsApp automaticamente. Confirmado: codigo fuente completo, base de datos y credenciales seran suyos al finalizar. Quedo atento.

@webbookstudios

Hi there! I'm Markiyan, a full stack developer and CEO of a web agency, and I'd love to help you build this custom CRM/ERP system for Aquantia. I understand you need a clean, simple, and scalable web application that automates your sales, contracts, installations, and automation workflow, integrating Meta Lead Ads, WhatsApp, and electronic signatures, among other features. My team and I have built similar custom CRM/ERP systems, including a learning platform website and a website for an electric bike company, utilizing technologies like JavaScript, React.js, Node.js, and MySQL, which would be a great fit for this project. I can deliver a fully functional, mobile-responsive CRM/ERP system tailored to your business workflow, with a modern and simple interface, secure authentication, and automatic timestamps. One question: how do you envision the user roles and permissions being structured, and are there any specific security or compliance requirements we should be aware of? Feel free to message me to discuss the details! — Markiyan

@rbtech1984

Hello!! The solution is to build a customized CRM and ERP web application that centralizes customer management, business operations, workflows, reporting, and daily tasks in one secure platform. A scalable full-stack system will be developed with role-based access, customer and data management, automated workflows, dashboards, reports, notifications, and an administration panel, while keeping the interface simple for everyday users. Relevant CRM, ERP, business management, and full-stack web applications have been completed before, turning complex business processes into smooth, practical systems that teams can actually enjoy using. Let us connect in chat and discuss your workflow and requirements. Best regards Farhin B

@AnumFatima210

Hi, I went through your project details and understand what you're looking to achieve. I'd be interested in working with you on this. Based on the requirements you've shared, I can handle the project from start to completion while keeping the work aligned with your expectations, timeline, and desired outcome. My approach is straightforward: first, I'll make sure the requirements and expected deliverables are clear. Then I'll complete the work in structured stages, share progress along the way, incorporate your feedback, and deliver the final work after everything has been reviewed. Before we begin, I have a couple of questions about your requirements that will help me understand the scope more accurately. Feel free to message me so we can discuss the details and determine the best way to move forward. Best regards, Anum

@toriquldev123

Hello There! I’m Md Toriqul Islam, an experienced full-stack developer specializing in custom CRM/ERP systems, React, Node.js/Django, PostgreSQL, REST APIs, automation, and third-party integrations. I understand you need a scalable custom CRM/ERP for Aquantia covering Meta Lead Ads → automatic WhatsApp → sales pipeline → contracts/e-signatures → financing → installations → invoicing → commissions → warranty/maintenance, with complete activity history and profitability reporting. I am skilled in Meta APIs, WhatsApp Business API, RBAC, PostgreSQL, PDF generation, e-signatures, dashboards, automation, audit logs, and responsive web applications. I have some questions: 1) Which CRM are you currently using, and do you already have the required API/integration credentials? 2) Do you have a preferred WordPress builder such as Elementor, Divi, or Gutenberg? 3) How many landing pages are you planning to build after the pilot page? I’m ready to discuss the Phase 1 scope, fixed-price estimate, timeline, technology architecture, API costs, and examples of similar systems. Looking forward to hearing from you. Best regards, Md Toriqul Islam

@denisSolution

Hi, I'm Denis, a full-stack developer specializing in custom CRM and business management systems. I can build exactly what you need for your Aquantia project. You need a system tracking customers from Meta leads through installation and maintenance, with automatic integrations, complete activity history, and role-based access. I've built similar systems with multi-stage lead flows, automatic external service integrations, and comprehensive audit trails. My approach: clarify requirements and plan architecture, build the core CRM foundation with sales pipeline and customer profiles, integrate Meta Lead Ads and WhatsApp automation, add contract and invoice generation, build the installer workflow, and create the financial dashboard. Testing, deployment, and documentation follow. I'd use Node.js and React with MySQL—a straightforward, maintainable stack. The critical piece is the activity timeline: every action must automatically log with timestamps and user information, requiring careful database design and consistent logging throughout. One realistic consideration is WhatsApp integration complexity. The official Business Platform has approval requirements and costs, which I'll clarify upfront. Meta Lead Ads integration is more straightforward using webhooks. You'll get full code ownership, database access, and complete documentation so you're never dependent on one developer. I can start immediately. Let's discuss the details. Thanks, Denis.

@sufyanasmat38

Hi, I can build this custom CRM and ERP around Aquantia’s complete workflow using React, TypeScript, Node.js, NestJS, and PostgreSQL, with integrations for Meta Lead Ads, automatic WhatsApp messaging, e signatures, document storage, invoicing, commissions, installations, warranty tracking, and profitability dashboards. I’ll focus on a clean, secure, mobile responsive architecture with role based access, complete activity history, automation, backups, and full ownership of the source code and database. I have experience building CRM dashboards, business workflows, API integrations, and scalable web applications, and can provide relevant previous work. I can start immediately and deliver a well structured Phase 1 implementation based on the finalized workflow and requirements.

@HamparProd

The key to this system is making the customer activity timeline and business workflow the foundation rather than building separate disconnected modules. For the complete Phase 1 described, my realistic fixed price is €8,500 with a 60-calendar-day delivery. I recommend Laravel, React/Vue, PostgreSQL and Redis. Meta leads would enter through webhook/API ingestion with duplicate protection; WhatsApp would use the official Business Platform with queued delivery and status callbacks; contracts and installation documents would use an eIDAS-capable signature provider with signed PDFs returned automatically to the customer record. The build would include CRM/pipeline, full activity history, financing, installations, contracts, invoicing, commissions, warranty/maintenance, profitability dashboard, roles, exports, backups and documentation. Aquantia would receive the complete source code, database, administrator/server access and deployment documentation. The architecture would remain maintainable by another developer. Recurring API/provider charges would be disclosed before integration. I can start immediately after award.