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Portfolio & Achievements

Discover our projects that transform businesses. Real metrics, proven ROI, authentic customer testimonials.

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98+
Score Lighthouse
<1.5s
Temps de chargement
100%
SEO optimisé
20%+
ROI garanti
50+
Projects Delivered
Since 2023
98%
Client Satisfaction
Average rating 4.9/5
240%
Average ROI
Return on investment
100%
Projects in Prod
Success rate
Web Development · SaaS

B2B E-commerce SaaS Platform

Order management and invoicing platform for 500+ B2B companies with ERP integration and complete automation.

⚠️ Défi

The client used 5 different tools (Excel, emails, PDF) causing data entry errors, invoicing delays and estimated time loss of 15h/week per sales rep.

✅ Solution

Development of a Next.js 15 SaaS platform with App Router, PostgreSQL, Redis cache, n8n webhooks for ERP automation, and REST/GraphQL API for third-party integrations.

Stack Technique

Next.js 15 React 19 PostgreSQL Redis Clerk Auth Stripe n8n Vercel Edge

Résultats Mesurables

98
Lighthouse Score
<50ms
API Response Time
99.97%
Uptime
2,400+
Active Users

Impact Business

  • 80% reduction in order processing time
  • Total elimination of invoicing errors
  • 320% ROI achieved in 8 months
  • 94% user adoption in 3 weeks
  • Expansion to 3 new European markets

"DevFlowAI transformed our sales process. We divided processing time by 4 and eliminated errors. The team was exceptional from scoping to post-launch support."

Marie Dubois
Operations Director, TechDistrib SAS
Artificial Intelligence · RAG

AI Customer Support Chatbot with RAG

Intelligent AI assistant with RAG for 24/7 customer support, capable of answering 85% of questions by analyzing 10,000+ pages of technical documentation.

⚠️ Défi

The support team received 200+ tickets/day of which 60% were repetitive documentation questions. Average response time of 4h frustrated customers.

✅ Solution

Custom RAG system with GPT-4 Turbo, Pinecone vector DB, fine-tuning on client data, streaming responses, and fallback to human agents with complete conversation context.

Stack Technique

GPT-4 Turbo Pinecone LangChain Next.js Vercel AI SDK PostgreSQL Redis Cloudflare Workers

Résultats Mesurables

92%
Accuracy
<2s
Response Time
180+
Questions/day
4.7/5
Satisfaction

Impact Business

  • 85% of questions resolved automatically
  • Response time reduced to <30 seconds
  • Customer satisfaction increased from 3.2/5 to 4.7/5
  • €120,000/year savings in support costs
  • 24/7 support available in 4 languages (EN/FR/ES/DE)

"Our AI chatbot now handles 85% of support requests automatically. Our teams finally focus on complex issues. Customers love the speed of responses."

Thomas Martin
Head of Customer Success, CloudTech Solutions
Web Development · Performance

Ultra-Fast Marketing Site with Astro

Multilingual marketing site (EN/FR/ES/DE) for SaaS startup with 100/100 Lighthouse score and optimal conversion.

⚠️ Défi

Old slow WordPress site (5.2s LCP), poor SEO (average position 45), 68% bounce rate. Need for multilingual and A/B testing.

✅ Solution

Complete redesign with Astro 4.0, Tailwind CSS, MDX for content, Cloudflare Pages deployment with edge caching, Plausible Analytics and Vercel Analytics integration for A/B testing.

Stack Technique

Astro 4.0 Tailwind CSS MDX TypeScript Cloudflare Pages Plausible Analytics Schema.org

Résultats Mesurables

100
Lighthouse
0.8s
LCP
+156%
Conversion
8.2
SEO rank

Impact Business

  • Lighthouse score from 42 to 100
  • LCP reduced from 5.2s to 0.8s
  • Conversion rate +156% (2.3% → 5.9%)
  • Organic traffic +240% in 6 months
  • Average SEO position from 45 to 8.2

"Incredible results! Our site loads instantly, our SEO exploded, and our conversions more than doubled. DevFlowAI masters Astro and Core Web Vitals perfectly."

Sophie Laurent
CMO, DataFlow AI
Automation · No-code

n8n Workflow Automation

Complete marketing and sales pipeline automation with n8n: lead capture, enrichment, scoring, CRM sync, and email nurturing.

⚠️ Défi

Time-consuming manual process: 12h/week to enrich leads, qualify prospects, and sync between 6 tools (LinkedIn, HubSpot, Stripe, Slack, Notion, Gmail).

✅ Solution

n8n architecture with 15 automated workflows: LinkedIn scraping, enrichment via APIs (Clearbit, Hunter.io), ML lead scoring, bidirectional CRM sync, and personalized email campaigns.

Stack Technique

n8n HubSpot API Clearbit Hunter.io PostgreSQL Redis Webhook integrations Custom API

Résultats Mesurables

50h/month
Time Saved
800+/month
Leads Processed
+45%
Conversion
680%
ROI

Impact Business

  • 12h/week saved per sales rep
  • 100% automatic lead qualification
  • Lead conversion rate +45%
  • 680% ROI in 4 months
  • Zero CRM synchronization errors

"n8n automation revolutionized our sales process. What took 12h/week is now instant and error-free. Our team focuses on customer relationships."

Alexandre Petit
Sales Director, SalesBoost France
Web Development · Mobile

E-commerce Progressive Web App

Next.js PWA e-commerce with ultra-fast checkout, offline cache, push notifications, and Stripe + logistics integration.

⚠️ Défi

Slow mobile site (8s loading), 72% cart abandonment, no push notifications, degraded offline experience. Need for app-like experience without native app.

✅ Solution

Next.js 15 PWA with Service Workers, optimal cache strategy, optimized Stripe Elements, advanced Image optimization, intelligent lazy loading, and Web API push notifications.

Stack Technique

Next.js 15 PWA Service Workers Stripe PostgreSQL Redis Vercel Web Push API

Résultats Mesurables

1.2s
Mobile speed
-47%
Cart abandonment
+195%
Conversion
23%
PWA installs

Impact Business

  • Mobile loading time from 8s to 1.2s
  • Cart abandonment reduced from 72% to 38%
  • Mobile conversions +195%
  • AOV (average cart) +34%
  • PWA installed by 23% of returning visitors

"Our PWA performs better than the native app we were considering. Mobile conversions exploded and our customers love the speed. An investment that paid for itself in 3 months."

Julien Rousseau
CEO, ModeStyle.fr
Web Development · Data Viz

Real-Time Analytics Dashboard

Real-time analytics dashboard for IoT monitoring of 10,000+ sensors with intelligent alerts and ML predictions.

⚠️ Défi

Existing slow dashboard (20s refresh), no real-time, basic visualizations, no automatic alerts. Need to monitor 10K+ IoT sensors simultaneously.

✅ Solution

React 19 + WebSockets architecture, Go backend with TimescaleDB, Redis cache, GraphQL subscriptions, custom D3.js visualizations, ML predictions with TensorFlow.js, and intelligent alert system.

Stack Technique

React 19 WebSockets GraphQL TimescaleDB Redis D3.js TensorFlow.js Go backend

Résultats Mesurables

<100ms
Latency
50K+
Max sensors
98%
ML Accuracy
-67%
Failures prevented

Impact Business

  • Real-time refresh (<100ms latency)
  • Capacity for 50K+ simultaneous sensors
  • 98% accuracy anomaly detection
  • 67% reduction in failures thanks to predictions
  • Interface 5x faster than competitor

"The real-time dashboard allowed us to prevent 67% of failures before they happened. The business value is enormous. The DevFlowAI team handled the complexity brilliantly."

David Bernard
CTO, SmartSensors Industry

Our Expertise

Mastered technologies and areas of excellence

🚀

Extreme Performance

Lighthouse 98+, green Core Web Vitals, advanced optimizations for exceptional user experience.

  • ✓ Next.js 15 + App Router
  • ✓ Astro Islands Architecture
  • ✓ Edge Computing (Cloudflare, Vercel)
  • ✓ Advanced cache strategies
🤖

Production AI

RAG systems, intelligent chatbots, fine-tuning, computer vision, ML predictions in production.

  • ✓ GPT-4, Claude Opus, Llama
  • ✓ RAG with Pinecone/Weaviate
  • ✓ LangChain + Vercel AI SDK
  • ✓ Custom fine-tuning
⚡

Advanced Automation

Complex n8n/Make workflows, multi-platform API integrations, measurable time savings.

  • ✓ n8n + Make workflows
  • ✓ Custom REST/GraphQL API
  • ✓ Intelligent webhooks
  • ✓ Real-time monitoring

Our Process

A proven methodology that guarantees your project's success

1

Discovery

Technical audit, needs analysis, objectives and KPIs definition

2

Design

Technical architecture, UX/UI mockups, client validation

3

Development

2-week agile sprints, regular demos, continuous feedback

4

Testing

Automated tests, performance audits, SEO optimizations

5

Launch

Production deployment, team training, continuous monitoring

Ready to create an exceptional project?

Let's discuss your goals and transform them into a high-performance technical solution. Free audit and detailed quote within 24 hours.

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