Florian Jousselin

Available to hire

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.

About

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.

  • Joined September 2025

Languages

  • FrenchFluent
  • EnglishFluent

Industry experience

  • Software & Internet
  • Professional Services
  • Media & Entertainment

Projects · 7

Blacksight | scanner.blacksight.io | DAST Website Security Scanner

  • Back-End Developer
  • Designer
  • Front-End Developer

Beauty Pie | beautypie.com | E-commerce Luxury Beauty Products

  • Back-End Developer
  • Front-End Developer
  • Web Developer

Secret Spa | secretspa.co.uk | Beauty & Wellness Treatments

  • Back-End Developer
  • Front-End Developer
  • Web Developer

Secret Spa | secretspa.co.uk | Beauty & Wellness Treatments

  • App Developer
  • Back-End Developer
  • Front-End Developer

Scapin | scapin.co.uk | Web & Mobile Development Agency

  • Designer
  • Front-End Developer
  • Web Developer

RetroFactory | retrofactory.fr | Classic Car Restoration

  • Front-End Developer
  • Web Developer

KXJ | kxj.io | North West Property Management

  • Front-End Developer
  • Web Developer

Work experience· 5 roles

Senior Application Security Engineer · Beauty Pie LtdAug 2025 – Sep 2025 · 2 mos

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 Front-End Engineer Consultant · Scapin LtdAug 2025 – Present · 1 yr 4 mos

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 Full Stack Engineer · Beauty Pie LtdNov 2022 – Sep 2025 · 2 yrs 11 mos

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 · Secret Spa LtdMar 2021 – Sep 2025 · 4 yrs 7 mos
Full Stack Engineer Consultant · Flinstar, Marseille, FranceJun 2019 – Sep 2025 · 6 yrs 4 mos

Education

Master's degree in Computer Science · Epitech, Paris, France2012 – 2017
Validation certificate · Brockport College, Brockport, NY, USA2016

Certifications and awards

OSEP (OffSec Experienced Penetration Tester)2023
OSCP (OffSec Certified Professional)2023

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