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Hello 👋 I am a Senior Front-End Web Developer, specialised in Next.js and React.js, working independently as a freelancer and entrepreneur based in England. I turn ideas into high-performance, scalable, and modern web applications, making use of the latest JavaScript/TypeScript technologies. 💎 Co-founder and lead developer of Blacksight, a cybersecurity (DAST) application built with Next.js, Firebase, and Stripe, used by 10,000+ users in the United States. 🚀 I have supported start-ups and large companies (healthcare, e-commerce, cybersecurity, services, social networks, etc.) in designing and deploying robust Next.js and React applications, often taking on major technical challenges (scalability, SEO, performance, security). ✅ Available for freelance projects on Twine. I give 100% to every project and have consistently received 5/5 client reviews. 🎯 Projects: Web Applications: Designing and developing reliable, scalable applications, precisely tailored to user needs with intuitive and secure interfaces. Showcase Websites: Front-end development of modern, dynamic websites that highlight the image of businesses, creators, and self-employed professionals. E-Commerce: Creating complete online shops, integrating product catalogue management, secure payments, and bespoke features. ⚙️ Tech stack: ▪️ Next.js / React.js / TypeScript (SSR, SSG, ISR) ▪️ Tailwind CSS, Framer, UX/UI prototyping ▪️ Firebase, Stripe, Node.js, GraphQL ▪️ React Native & Expo (if mobile is required) 📩 Contact: ➡️ Quick responses within an hour. ➡️ Available 7 days a week via Twine messaging. Get in touch to discuss your project and explore the best solutions together.…Hello 👋 I am a Senior Front-End Web Developer, specialised in Next.js and React.js, working independently as a freelancer and entrepreneur based in England. I turn ideas into high-performance, scalable, and modern web applications, making use of the latest JavaScript/TypeScript technologies. 💎 Co-founder and lead developer of Blacksight, a cybersecurity (DAST) application built with Next.js, Firebase, and Stripe, used by 10,000+ users in the United States. 🚀 I have supported start-ups and large companies (healthcare, e-commerce, cybersecurity, services, social networks, etc.) in designing and deploying robust Next.js and React applications, often taking on major technical challenges (scalability, SEO, performance, security). ✅ Available for freelance projects on Twine. I give 100% to every project and have consistently received 5/5 client reviews. 🎯 Projects: Web Applications: Designing and developing reliable, scalable applications, precisely tailored to user needs with intuitive and secure interfaces. Showcase Websites: Front-end development of modern, dynamic websites that highlight the image of businesses, creators, and self-employed professionals. E-Commerce: Creating complete online shops, integrating product catalogue management, secure payments, and bespoke features. ⚙️ Tech stack: ▪️ Next.js / React.js / TypeScript (SSR, SSG, ISR) ▪️ Tailwind CSS, Framer, UX/UI prototyping ▪️ Firebase, Stripe, Node.js, GraphQL ▪️ React Native & Expo (if mobile is required) 📩 Contact: ➡️ Quick responses within an hour. ➡️ Available 7 days a week via Twine messaging. Get in touch to discuss your project and explore the best solutions together.

Florian Jousselin

PRO

Web Developer, Front-End Developer, App Developer

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Hello 👋 I am a Senior Front-End Web Developer, specialised in Next.js and React.js, working independently as a freelancer and entrepreneur based in England. I turn ideas into high-performance, scalable, and modern web applications, making use of the latest JavaScript/TypeScript technologies. 💎 Co-founder and lead developer of Blacksight, a cybersecurity (DAST) application built with Next.js, Firebase, and Stripe, used by 10,000+ users in the United States. 🚀 I have supported start-ups and large companies (healthcare, e-commerce, cybersecurity, services, social networks, etc.) in designing and deploying robust Next.js and React applications, often taking on major technical challenges (scalability, SEO, performance, security). ✅ Available for freelance projects on Twine. I give 100% to every project and have consistently received 5/5 client reviews. 🎯 Projects: Web Applications: Designing and developing reliable, scalable applications, precisely tailored to user needs with intuitive and secure interfaces. Showcase Websites: Front-end development of modern, dynamic websites that highlight the image of businesses, creators, and self-employed professionals. E-Commerce: Creating complete online shops, integrating product catalogue management, secure payments, and bespoke features. ⚙️ Tech stack: ▪️ Next.js / React.js / TypeScript (SSR, SSG, ISR) ▪️ Tailwind CSS, Framer, UX/UI prototyping ▪️ Firebase, Stripe, Node.js, GraphQL ▪️ React Native & Expo (if mobile is required) 📩 Contact: ➡️ Quick responses within an hour. ➡️ Available 7 days a week via Twine messaging. Get in touch to discuss your project and explore the best solutions together.…Hello 👋 I am a Senior Front-End Web Developer, specialised in Next.js and React.js, working independently as a freelancer and entrepreneur based in England. I turn ideas into high-performance, scalable, and modern web applications, making use of the latest JavaScript/TypeScript technologies. 💎 Co-founder and lead developer of Blacksight, a cybersecurity (DAST) application built with Next.js, Firebase, and Stripe, used by 10,000+ users in the United States. 🚀 I have supported start-ups and large companies (healthcare, e-commerce, cybersecurity, services, social networks, etc.) in designing and deploying robust Next.js and React applications, often taking on major technical challenges (scalability, SEO, performance, security). ✅ Available for freelance projects on Twine. I give 100% to every project and have consistently received 5/5 client reviews. 🎯 Projects: Web Applications: Designing and developing reliable, scalable applications, precisely tailored to user needs with intuitive and secure interfaces. Showcase Websites: Front-end development of modern, dynamic websites that highlight the image of businesses, creators, and self-employed professionals. E-Commerce: Creating complete online shops, integrating product catalogue management, secure payments, and bespoke features. ⚙️ Tech stack: ▪️ Next.js / React.js / TypeScript (SSR, SSG, ISR) ▪️ Tailwind CSS, Framer, UX/UI prototyping ▪️ Firebase, Stripe, Node.js, GraphQL ▪️ React Native & Expo (if mobile is required) 📩 Contact: ➡️ Quick responses within an hour. ➡️ Available 7 days a week via Twine messaging. Get in touch to discuss your project and explore the best solutions together.

Available to hire

Liverpool, United Kingdom

Hello 👋

I am a Senior Front-End Web Developer, specialised in Next.js and React.js, working independently as a freelancer and entrepreneur based in England. I turn ideas into high-performance, scalable, and modern web applications, making use of the latest JavaScript/TypeScript technologies.

💎 Co-founder and lead developer of Blacksight, a cybersecurity (DAST) application built with Next.js, Firebase, and Stripe, used by 10,000+ users in the United States.

🚀 I have supported start-ups and large companies (healthcare, e-commerce, cybersecurity, services, social networks, etc.) in designing and deploying robust Next.js and React applications, often taking on major technical challenges (scalability, SEO, performance, security).

✅ Available for freelance projects on Twine. I give 100% to every project and have consistently received 5/5 client reviews.

🎯 Projects:

Web Applications: Designing and developing reliable, scalable applications, precisely tailored to user needs with intuitive and secure interfaces.

Showcase Websites: Front-end development of modern, dynamic websites that highlight the image of businesses, creators, and self-employed professionals.

E-Commerce: Creating complete online shops, integrating product catalogue management, secure payments, and bespoke features.

⚙️ Tech stack:

▪️ Next.js / React.js / TypeScript (SSR, SSG, ISR)
▪️ Tailwind CSS, Framer, UX/UI prototyping
▪️ Firebase, Stripe, Node.js, GraphQL
▪️ React Native & Expo (if mobile is required)

📩 Contact:

➡️ Quick responses within an hour.
➡️ Available 7 days a week via Twine messaging.

Get in touch to discuss your project and explore the best solutions together.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Language

French

Fluent

English

Fluent

Work Experience

Senior Front-End Engineer Consultant at Scapin Ltd

August 1, 2025 - Present

Built scalable web and mobile apps using React, Next.js, React Native, and Firebase; delivered secure, pixel-perfect products by blending engineering and UX/UI best practices; led projects from concept to production across industries.

Senior Application Security Engineer at Beauty Pie Ltd

August 1, 2025 - September 8, 2025

Created and led a new internal cybersecurity team; implemented security awareness trainings, monitoring, third-party security audits, incident logs, security on-calls, and developer documentation. Created security solutions and tools; performed internal and external penetration tests on company assets. Result: reduced attack detection time from 15 days to under 1 hour and established global confidence in cybersecurity.

Senior Full Stack Engineer at Beauty Pie Ltd

November 1, 2022 - September 8, 2025

Part of the customer experience team; redesigned the website and API to improve customer experience and conversion rate. Result: the company raised £100M in Series B funding.

Senior Full Stack Engineer Consultant at Secret Spa Ltd

March 1, 2021 - September 8, 2025

Redesigned the whole platform (mobile and web apps) with another developer using agile, test-driven development and a customer-focused approach; contributed to significant platform growth and expanded the customer base to 50K+ users.

Full Stack Engineer Consultant at Flinstar, Marseille, France

June 1, 2019 - September 8, 2025

I created in 2018, the company Flinstar, specialised in mobile development. I developed, for multiple clients, hybrid mobile applications in React Native or Flutter using powerful tools and languages. I cared a lot about quality (good practices, good architecture, multi-languages, commented code, etc) and details. I also often had to create the design for the projects so I improved my designing skills over the months. Clients were always satisfied about my work, my reactivity and the ideas I could bring to the table.