Global corporate website for Keolis Group — one of the world's leading public transport operators. JAMstack architecture, multilingual, WCAG compliant.
ReactGatsbyGraphQLDatoCMSTypeScript
Technical LeadFront-End
Technical Lead Front-EndReact & Flutter ExpertArchitecture & Performance
10+ years experience building scalable web and mobile applications. Specialized in React ecosystems, design systems, performance optimization and mobile development with Flutter.
ReactNext.jsTypeScriptFlutterGraphQLTailwind
About Me
Crafting digital experiences at scale
Technical Lead Front-End with more than 10 years of experience building large-scale web platforms and mobile applications for millions of users.
Since 2019, I have been driving front-end excellence at Keolis Group, one of the world's leading public transport operators. My role spans from translating complex business requirements into robust technical architectures to mentoring engineering teams and defining best practices aligned with Green IT principles.
I believe great front-end engineering is about more than writing code — it's about building accessible, performant, and maintainable products that genuinely improve people's daily lives.
Currently
Technical Lead Front-End
Keolis Group · 2019 – Present
- Translating business needs into technical architecture
- Designing maintainable solutions (Green IT)
- Mentoring & coaching engineering teams
- Code reviews & architectural guidance
- Technical support to subsidiaries
- Standards & best practices enforcement
Core Expertise
React
Next.js
Gatsby
Flutter
TypeScript
GraphQL
CI/CD
Front-End Architecture
Performance Optimization
Accessibility
Design Systems
10+
Years of Experience
40+
Transport Sites Built
5+
Mobile Apps Shipped
2
Major Group Brands
“I'm passionate about building products that are fast, accessible, and delightful to use — both for end users and for the developers maintaining them.”
Experience
Where I've worked
A career built on delivering large-scale, production-grade front-end systems.
Technical Lead Front-End
Keolis Group
- Translation of business requirements into robust technical front-end architecture
- Design of maintainable, scalable solutions aligned with Green IT principles
- Mentoring and coaching of cross-functional engineering teams
- Conducting thorough code reviews and guiding architectural decisions
- Providing technical support across international subsidiaries
- Establishing coding standards, best practices and CI/CD pipelines with Azure DevOps
- Championing digital accessibility (WCAG 2.1 AA) across all products
- Implementing Google Tag Manager tracking strategies
ReactGatsbyNext.jsTypeScriptGraphQLFlutterDartAzure DevOpsCI/CDDatoCMSGoogle Tag ManagerWCAGGreen IT
Key Projects
Global corporate website for Keolis Group, a world leader in public transport. Built with JAMstack architecture for performance and scalability.
ReactGatsbyGraphQLDatoCMSTypeScript
Travel booking platform for Keolis passengers — coach travel across France with real-time availability and booking flows.
ReactGatsbyGraphQLREST APIDatoCMS
Information Voyageurs Factory
A site factory powering 40+ transport network websites — dynamic, localised passenger information portals built from a single codebase.
ReactGatsbyGraphQLTypeScript
Mobile Factory – Flutter
Multi-app mobile factory for on-demand transport services across France. Scalable architecture enabling rapid white-label deployments.
FlutterDartREST APIsMobile Architecture
Skills
Technologies I work with
A curated toolkit built through years of production-grade engineering.
⚡
Frontend
React
Next.js
Gatsby
TypeScript
JavaScript
CSS3 / Sass
Tailwind CSS
📱
Mobile
Flutter
Dart
🏗️
Architecture
Design Systems
Front-End Architecture
Performance Optimization
Scalability
Accessibility (WCAG)
📊
Data & Viz
D3.js
Recharts
🔗
Backend & APIs
GraphQL
REST API
🔧
DevOps
Azure DevOps
CI/CD
AWS S3
Green IT
Always learning — currently exploring AI-augmented development, Web Components and Edge computing.
Projects
Things I've built
A selection of projects I'm proud of — from corporate platforms to mobile apps.
Coach travel booking platform for Keolis passengers. Real-time seat availability, booking flows and dynamic pricing.
ReactGatsbyGraphQLREST APIDatoCMS
Information Voyageurs Factory
⭐
A site factory delivering 40+ transport network websites from a single unified codebase. Dynamic, localised and accessible passenger info portals.
ReactGatsbyGraphQLTypeScript
Mobile Factory – Flutter
⭐
White-label Flutter mobile app factory for on-demand transport. Powers multiple iOS & Android apps across different Keolis networks.
FlutterDartREST APIs
KEOLIS OSKAR
Internal fraud control application for transport inspectors. Real-time data, offline-capable mobile app used across multiple cities.
FlutterDartREST APIs
PAM 75 Platform
On-demand transport booking platform for people with disabilities in Paris. Accessible by design, WCAG AA compliant.
FlutterDartREST APIs
Adomik SaaS Dashboard
Analytics SaaS platform for programmatic advertising. Complex data visualisation dashboards handling millions of ad transaction records.
ReactReduxD3.jsRechartsJestAWS S3
Contact
Let's work together
Have a project in mind or want to connect? I'd love to hear from you.
Open to opportunities
Technical Lead, Staff Engineer or Principal Engineer roles.
Open to consulting
Architecture reviews, front-end audits and coaching missions.
Quick response
I typically respond within 24 hours.
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