Diagmarket.fr

Overview

Diagmarket.fr is a complete B2B SaaS platform that revolutionizes the real estate diagnostic and energy audit market in France. The solution connects professional diagnosticians, business developers and end customers through a modern ecosystem integrating marketplace, mission management, payments and CRM.

Impact: Complete automation of the sales and diagnostic execution cycle, from customer request to generation of regulatory PDF reports.

Key Features

🔍 Marketplace & Intelligent Search

• Geolocation-based search engine: automatic matching algorithm between missions and technicians based on skills, location and availability
• Advanced filters: diagnostic type (DPE, ERP, Asbestos, Lead…), urgency, price, rating
• Real-time availability calculation: integration of technician calendars with reservation system

👷 Technician & Professional Management

• Certified profiles: verification of RGE certifications, professional insurance and qualifications
• Smart calendar: synchronization of availability with automatic reservation system
• Geographic service areas: definition of territories with travel cost calculation
• Analytical dashboard: tracking of revenue, conversion rate, customer reviews and performance
• 5-star rating system: verified reviews post-mission with moderation

💼 End-to-end Order Workflow

• Complete cycle: request → automatic quote → Stripe payment → technician assignment → execution → PDF report generation → invoicing
• Quote management: automatic generation with customizable templates
• Notification system: emails (Brevo) and in-app notifications at each step
• Dispute management: integrated complaint and mediation system

🎫 NFC Badge & Business Development Program

An innovative B2B loyalty system that transforms every partner into an ambassador:

• Personalized NFC badges: automatic generation of physical badges with NFC chip, customized with the name, surname and logo of the referring company
• Instant promo code generation: a simple scan (NFC) creates a unique, timestamped and traceable discount code, automatically linked to the referrer
• Conversion tracking: automatic attribution of each sale to the correct referrer with complete history
• Commission dashboard: dedicated interface to track sales generated, commissions earned and payment statuses in real time
• Advanced analytics: conversion rate by referrer, badge ROI, best performing channels

📝 Regulatory Report Generation

• Professional PDF templates: reports compliant with legal standards (DPE, ERP, Asbestos…)
• Integrated QR codes: link to website + document authenticity verification

📊 Administration & Back-office

• Real-time analytics dashboard: revenue, number of missions, conversion rate, business KPIs
• Multi-role management: administrators, technicians, business developers
• Integrated blog module: SEO article writing via Strapi CMS with client-side rendering
• Internal messaging system: chat between customers and technicians with history

Learning & Skills Development

This project allowed me to develop comprehensive expertise in modern full-stack development:

🚀 Technical

• Golang mastery: robust API architecture, concurrency management, production patterns
• SvelteKit expertise: hybrid SSR/CSR, advanced routing, performance optimizations
• NoSQL at scale: flexible MongoDB schema design, optimized queries, aggregations
• Third-party integrations: Stripe (complex payments), Brevo (transactional email), Strapi (headless CMS)
• Application security: implementation of OWASP best practices, robust authentication management

💼 Business & Product

• Domain understanding: immersion in the real estate diagnostic and energy audit sector
• B2B SaaS: design of a multi-tenant platform with roles and permissions
• Gamification & loyalty: innovative NFC badge system for business development program

🎨 Design & UX

• Consistent design system: creation of strong visual identity
• Accessibility
• Mobile-first: seamless experience across all devices with responsive approach

---

Result: A platform that fully digitizes the real estate diagnostic journey, generates measurable ROI for business developers, and provides a modern user experience for both professionals and end customers. 🎯