CoProx — a client extranet to digitalize the proximity relationship
A secure portal bringing the company closer to its clients: documents, cases and exchanges in one place.
- Location
- Paris — France
- Sector
- Services & Real estate
- Project type
- Secure client extranet (B2B)
- Expertise
- UX/UI Design · Web development · Secure extranet
CoProx is a modern proximity property-management company, attentive to occupants' expectations. Its approach emphasizes communication and transparency in managing co-ownerships.
Digitalizing the relationship between a service company and its clients: giving them simple, secure and permanent access to their information and documents.
- Provide secure, personalized access to clients.
- Centralize documents and case tracking.
- Smooth communication and transparency.
The real product, screen by screen
The solution — Secure client extranet (B2B). Here are the delivered product's interfaces.

Dashboard
Overview of activity and key indicators.

Property space
General information, lots, documents and contracts.

Payment space
Tracking of calls, settlements and payment history.

Maintenance tracking
Intervention requests, scheduling and operation tracking.
Our approach
- 1
Analysis — Understanding client journeys and relationship needs.
- 2
Design — Extranet architecture, security and personal spaces.
- 3
Development — Secure portal, document management and case tracking.
- 4
Deployment — Go-live, administration and support.
The system modules
Client context established from public information. The extranet features are presented as a coherent scope.
- 1Client
- 2Authentication
- 3Client space
- 4Document management
- 5Administration
Secure authentication
Login and account management, protected access.
Personal space
Information and content dedicated to each client.
Document management
Viewing, download and organization of documents.
Case tracking
Request status, administrative tracking and history.
Notifications
Alerts and important information at the right time.
Administration
Users, permissions and configuration.
The system can be structured around several business profiles:
- Client / occupant
- Manager
- Administrator
Technologies used
Next.js
Role
Fast, modern, optimized interface.
Tailwind CSS
Role
A fast, consistent design system.
Node.js
Role
Performant, scalable business API.
Express.js
Role
Lightweight, battle-tested Node APIs.
MongoDB
Role
Flexible, scalable document database.
Prometheus
Role
Real-time metrics and alerting.
What the solution enables
Give clients secure access to their information.
Centralize documents and case tracking.
Strengthen the transparency of the relationship.
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