Freelancer profile translated to English.
Back to original languageAbout Sofian
I help product teamsunblock and structure complex frontends before they become a barrier to growth.
Forover 5 years**, I have been working with **startups**, **scale-ups**, and **large corporationsonfrontend architecture**, **Design Systems**, and **complex data visualizationissues.
Many frontend products slow down due tohard-to-maintain codebases**, **technical debt**, or **performance issues**. I help teams **restore clarity, structure, and scalability to their applications.
My involvement:
- React / TypeScript frontendArchitecture
- Design and evolution ofDesign Systems and component libraries
- Structuringcomplex and shared codebases
- Improvement ofmaintainabilityand softwarequality
- Support andskill development for teams
Recent experiences:
- OSINT platforms with high technical constraints
- Interactive graph systems (10k+ nodes)
- Advanced mapping interfaces
What my clients appreciate:
- Highautonomyandquick integrationinto teams
- Ability toquickly unblock complex issues
- High level ofdemandfor thequality of deliverables
Main Stack
React • TypeScript
Available for assignments
Senior Frontend Engineer • Lead Frontend
Paris • Hybrid / Remote
French
Native or bilingual
English
Native or bilingual
Can work on-site
Paris (up to 30km), Paris (up to 20km)
Experience
- Descartes UnderwritingSenior Frontend EngineerBANKING AND INSURANCEMarch 2026 - Today (3 months)ContextTransversal interventionwithin several product teamsonSaaS platformsspecializing in **insurance and climate risk management**. The developed applications handle **complex business data**, **mapping visualizations**, and **dashboards used in environments with high technical requirements**.My RoleI act as aSenior Frontend Engineerwith astrong transversal dimensionto support teams on frontend architecture, **standardization**, **maintainability**, and **application quality issues for the group's React applications**.Key Contributions
- Development of complex frontend interfaces with React and TypeScript
- Maintenance and evolution of thegroup's shared React template
- Implementation ofbest practicesaroundobservability**, **Sentry**, and **application quality
- Participation infrontend architecture choicesandtransversal technical discussions
- Organization ofbi-weekly React workshops(5 to 7 developers)
Technical EnvironmentReact • TypeScript • TanStack Query • Zustand • TailwindCSS • FastAPI • MapGL • Storybook • Sentry - PumpHouse - Plateforme de trading automatiséSenior Full Stack EngineerPRIVATE EQUITYJanuary 2025 - December 2025 (11 months)Paris, FranceContextPumpHouse is an automated crypto trading platform leveraging signals from social networks to detect and execute investment opportunities on the Solana blockchain. The platform operates with real capital and has demonstrated validated production performance, multiplying the initial portfolio by 12.My RoleI led the entire technical design of the platform, from the initial architecture to production deployment. My role covered product development, infrastructure, real-time data collection systems, blockchain integration, and artificial intelligence components.Key Contributions
- Design and development of the automated trading strategy management and execution platform
- Development of a real-time data collection system via Twitter / X scraping on dynamic lists of accounts to monitor
- Design and implementation of configurable and customizable trading strategy engines
- Integration with the Solana blockchain for automated transaction execution and position tracking
- Development of AI-based sentiment analysis pipelines to assess the potential impact of detected publications
- Implementation of an event-driven architecture for real-time signal processing and rapid order execution
- Deployment, monitoring, and maintenance of the production infrastructure
- Development of a Telegram alerting system for continuous monitoring of platform performance and operational status
Technical EnvironmentTypeScript • React • Next.js • Node.js • PostgreSQL • Solana Web3 • Docker • Telegram Bot API • Twitter/X Scraping - ChapsVisionSenior Frontend EngineerDIGITAL AND ITJune 2024 - December 2025 (1 year and 6 months)Paris, FranceContextInvolvement in several investigation products and internal platforms within ChapsVision, in environments handling sensitive data and requiring complex business interfaces. Creation of the group's shared React Design System.My RoleI act as a Senior Frontend Engineer on various products to design and maintain complex React interfaces, while contributing to frontend standardization and the evolution of the group's Design System.Key Contributions
- Development and maintenance of several investigation tools within different product teams
- Taking over and maintaining a legacy frontend product with a focus on evolving it, independently
- Participation in the design and evolution of the group's React Design System
- Implementation and maintenance of Storybook for component documentation and reuse
- Development of dashboards and business interfaces focused on analysis and investigation
- Design of complex frontend workflows, particularly around multi-step and multi-page forms
Results- Improved UI consistency across several group products
- Simplified component reuse through a shared Design System
- Stabilization and maintenance of a critical legacy product independently
- Enhanced user experience on complex business workflows with high data entry volume
Technical EnvironmentReact • TypeScript
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Education
- Expert in Information TechnologyEPITECH, Paris2020Master de développement Informatique, formation intensive à plusieurs langage de programmation par la réalisation de plus de 60 projets.