Freelancer profile translated to English.
Back to original languageAbout Steeven
Full-Stack Developer specialized in Next.js, React, and TypeScript, I support startups, SMEs, and entrepreneurs in the design, development, and evolution of modern web applications.
Graduated with a Master's degree in Full-Stack & Big Data, I design performant, scalable, and maintainable solutions, from the MVP phase to production.
What I can do:
- Development of SaaS and web platforms.
- Creation of MVPs from Figma mockups.
- Development of REST APIs and business features.
- Taking over, maintaining, and evolving existing projects.
- Optimization of performance and user experience.
Technical Stack:
Frontend: Next.js, React, TypeScript, Tailwind CSS, shadcn/ui
Backend: Node.js, Express.js, Prisma
Databases: PostgreSQL, Supabase
Some achievements:
- HR SaaS for application management and tracking.
- Marketplace-type platform.
- Business intelligence dashboards and tools.
- Optimization of Next.js applications and improvement of their maintainability.
I place great importance on code quality, architecture, and understanding business needs to propose adapted and sustainable solutions.
My method:
- Understand your needs and objectives.
- Define a clear roadmap.
- Develop with regular exchanges.
- Deliver clean, documented, and scalable code.
Why work with me?
- Clear and responsive communication.
- Quality and performance-oriented development.
- Product vision and pragmatic approach.
- Respect for deadlines and best practices.
Available immediately.
Let's discuss your project to identify the most suitable solution together.
French
Native or bilingual
English
Conversational
Lingala
Native or bilingual
Can work on-site
Paris (up to 50km), Reims (up to 10km), Rouen (up to 10km), Tours (up to 10km)
Experience
- Genius CareerFull-Stack Developer React.JS / Next.JSCONSULTING AND AUDITSDecember 2024 - May 2025 (5 months)Paris, France🎯 The CompanyGenius Career is a consulting firm specializing in the recruitment, selection, and placement of executives. The company operates a digital platform for connecting and coaching careers.The technical challenge was to support an online placement agency business requiring high-level performance for candidate processing and a fluid user experience for recruiters and talent.🎯 My Missions
- Optimization of frontend performance (Core Web Vitals).
- Transformation of Figma mockups into reusable components.
- Implementation of server-side pagination for managing large volumes of data.
- Asynchronous management of client-server exchanges.
- Structuring of pages and routing under Next.js.
🎯 Organization and MethodologyWork in short cycles with regular validation and UX adjustments based on user feedback. Full autonomy on technical aspects related to performance and interface.🏆 Impact and Results- Reduction of **40% in Largest Contentful Paint (LCP)**.
- Improvement of **35% in Time To Interactive (TTI)**.
- Acceleration of **30% in application response times**.
- Increase of25% in integration speedthanks to reusable components.
These improvements have streamlined the user experience and made the platform more usable for end-users. - SOSEP GroupFront-End DeveloperE-COMMERCEOctober 2022 - February 2023 (4 months)Paris, France🎯 The CompanySOSEP Group is a company specializing in the development of digital solutions and application services.Projects involved the creation of web interfaces connected to secure backend services and handling business data.🎯 My MissionsAs a Front-End Developer, I was responsible for integrating user interfaces and connecting with backend services:
- Pixel-perfect integration of Figma mockups.
- Development of responsive and adaptive pages (desktop, tablet, mobile).
- Connection to secure REST APIs provided by the backend team.
- Management of application states and dynamic data display.
- Structuring components to improve code maintainability.
🎯 Organization and CollaborationI worked in direct coordination with backend developers to ensure the smooth flow of data between the interface and API services.Developments were versioned under Git with continuous feature validation to ensure deployment stability.🏆 Results and Contributions- Stable and production-ready interfaces.
- Reliability of front-end / backend exchanges.
- Visual consistency respecting mockups.
- Base of reusable components facilitating future evolution.
- L2R Office ServicesWeb Integrator / WordPressCONSULTING AND AUDITSSeptember 2021 - December 2021 (3 months)Paris, France🎯 The CompanyL2R Office Services assists companies in creating showcase websites and enhancing their online presence, with a focus on user experience and natural referencing.🎯 My MissionsAs a web integrator, I was responsible for creating and optimizing showcase websites for clients:
- Integration of WordPress sites from custom designs.
- Theme customization to meet specific client needs.
- Optimization of SEO performance and loading times.
- Monitoring web integration best practices.
- Creation of reusable components to speed up the deployment of new sites.
🎯 Organization and MethodologyCollaboration with designers and project managers.Each site was delivered to production after validation, with responsive compatibility testing and adherence to performance standards.🏆 Results and Contributions- Deployment of stable showcase websites faithful to mockups.
- Improvement of SEO performance.
- Implementation of modular practices for future projects.
Recommendations
These freelancer profiles also match your criteria
Agatha Frydrych
Backend Java Software Engineer
4.7
(3)
2
Baptiste Duhen
Fullstack developer
4.6
(4)
5
Amed Hamou
Senior Lead Developer
4
(2)
7
Audrey Champion
Web developer
4.3
(3)
4
Education
- Full-Stack Big Data Developer (M2)L'Ecole Multimédia2025Projet : Application Next.js + Prisma + ElasticSearch + PostgreSQL (auth JWT, ISR) – déployée sur Vercel. Modules clés : Architecture web, DevOps (CI/CD), Data & Cloud, Performance Web, Data pipelines.
- Master 1 (M1), Multimedia DeveloperL'École Multimédia2023Projet : site vitrine responsive avec CMS headless (Next.js) Modules clés : Intégration web, UX/UI, Accessibilité, SEO
Certifications
- Full Stack BIG DATA DeveloperCEGEFOS2025
- Multimedia DeveloperEcad Consultants2023