I build clean, reliable web applications that help businesses move faster. I’m Full Stack Developer specialized in Ruby on Rails, React, SaaS products, back-offices and internal tools. I help companies turn business problems into clean, reliable web applications. My focus is simple: understand the need, build the right solution, and deliver something that works in the real world. 🚀 What I can help you build • SaaS applications • Internal tools • Back-offices and admin panels • Dashboards and reporting tools • Customer portals • Business workflows • API integrations • MVPs and custom web applications • Existing Ruby on Rails or React applications 🏆 Selected experience • Cheerz — Built a new internal back-office from scratch, connected to multiple applications used daily by internal teams. • Getaround — Worked on operations features, vehicle management flows, booking workflow tracking and automation logic. • SchoolMaker — Interim CTO: improved performance, fixed critical issues, added product modules and strengthened Stripe/payment workflows. • Qonto — Contributed to the 2022 rebranding, built a custom CMS, migrated the Penta website and developed business-critical features. • OCTO Technology — Maintained and developed internal applications, including a frontend migration from jQuery to React. • Homeys — Redesigned the company website and web application with dashboards and data visualizations. 🛠️ Tech stack • Backend: Ruby, Ruby on Rails • Frontend: React, JavaScript, TypeScript, Stimulus, HTML, CSS • UI: Tailwind CSS, Bootstrap, Sass • Databases: PostgreSQL, MySQL • Cloud & DevOps: Heroku, AWS S3, CloudFront, Google Cloud, GitHub, GitLab • Other: APIs, Stripe, dashboards, admin panels, automation, monitoring, testing 🤝 Why work with me? I don’t just write code. I help clarify the problem, choose the right technical approach, and build something useful, maintainable and ready for real users. I’m serious about quality, communication and delivery — but easy to work with. If you need someone who can take ownership and help you move faster, let’s talk.

Najib Tahar-Berrabah

I build clean, reliable web applications that help businesses move faster. I’m Full Stack Developer specialized in Ruby on Rails, React, SaaS products, back-offices and internal tools. I help companies turn business problems into clean, reliable web applications. My focus is simple: understand the need, build the right solution, and deliver something that works in the real world. 🚀 What I can help you build • SaaS applications • Internal tools • Back-offices and admin panels • Dashboards and reporting tools • Customer portals • Business workflows • API integrations • MVPs and custom web applications • Existing Ruby on Rails or React applications 🏆 Selected experience • Cheerz — Built a new internal back-office from scratch, connected to multiple applications used daily by internal teams. • Getaround — Worked on operations features, vehicle management flows, booking workflow tracking and automation logic. • SchoolMaker — Interim CTO: improved performance, fixed critical issues, added product modules and strengthened Stripe/payment workflows. • Qonto — Contributed to the 2022 rebranding, built a custom CMS, migrated the Penta website and developed business-critical features. • OCTO Technology — Maintained and developed internal applications, including a frontend migration from jQuery to React. • Homeys — Redesigned the company website and web application with dashboards and data visualizations. 🛠️ Tech stack • Backend: Ruby, Ruby on Rails • Frontend: React, JavaScript, TypeScript, Stimulus, HTML, CSS • UI: Tailwind CSS, Bootstrap, Sass • Databases: PostgreSQL, MySQL • Cloud & DevOps: Heroku, AWS S3, CloudFront, Google Cloud, GitHub, GitLab • Other: APIs, Stripe, dashboards, admin panels, automation, monitoring, testing 🤝 Why work with me? I don’t just write code. I help clarify the problem, choose the right technical approach, and build something useful, maintainable and ready for real users. I’m serious about quality, communication and delivery — but easy to work with. If you need someone who can take ownership and help you move faster, let’s talk.

Available to hire

I build clean, reliable web applications that help businesses move faster.

I’m Full Stack Developer specialized in Ruby on Rails, React, SaaS products, back-offices and internal tools.

I help companies turn business problems into clean, reliable web applications. My focus is simple: understand the need, build the right solution, and deliver something that works in the real world.

🚀 What I can help you build

• SaaS applications
• Internal tools
• Back-offices and admin panels
• Dashboards and reporting tools
• Customer portals
• Business workflows
• API integrations
• MVPs and custom web applications
• Existing Ruby on Rails or React applications

🏆 Selected experience

• Cheerz — Built a new internal back-office from scratch, connected to multiple applications used daily by internal teams.
• Getaround — Worked on operations features, vehicle management flows, booking workflow tracking and automation logic.
• SchoolMaker — Interim CTO: improved performance, fixed critical issues, added product modules and strengthened Stripe/payment workflows.
• Qonto — Contributed to the 2022 rebranding, built a custom CMS, migrated the Penta website and developed business-critical features.
• OCTO Technology — Maintained and developed internal applications, including a frontend migration from jQuery to React.
• Homeys — Redesigned the company website and web application with dashboards and data visualizations.

🛠️ Tech stack

• Backend: Ruby, Ruby on Rails
• Frontend: React, JavaScript, TypeScript, Stimulus, HTML, CSS
• UI: Tailwind CSS, Bootstrap, Sass
• Databases: PostgreSQL, MySQL
• Cloud & DevOps: Heroku, AWS S3, CloudFront, Google Cloud, GitHub, GitLab
• Other: APIs, Stripe, dashboards, admin panels, automation, monitoring, testing

🤝 Why work with me?

I don’t just write code. I help clarify the problem, choose the right technical approach, and build something useful, maintainable and ready for real users.

I’m serious about quality, communication and delivery — but easy to work with.

If you need someone who can take ownership and help you move faster, let’s talk.

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Experience Level

Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
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Language

French
Fluent
English
Advanced

Work Experience

Full Stack Developer at Cheerz
September 1, 2025 - March 1, 2026
Built a new back-office team and upskilled the back-end team on a new React.js project.
Full Stack Developer at Solocal
April 1, 2025 - July 1, 2025
Migrated existing features to a new application version; resolved bugs to improve stability and performance; enhanced features and improved the admin interface for better usability.
Full Stack Developer at Getaround
April 1, 2024 - March 1, 2025
Assisted the supply team to achieve the next quarters goals: implemented a feature to automatically deactivate cars with low acceptance rates for rental requests. Developed a tracking system for reservations. Created the Getaround Entrepreneur team members, and manage vehicles and rental requests collaboratively.
Interim CTO at Schoolmaker
June 1, 2023 - January 1, 2024
Optimized SQL queries for improved performance. Implemented caching solutions using Redis (low-level caching, fragment caching). Developed and deployed new application modules. Upgraded the database to ensure scalability and stability. Refactored and added tests for the Stripe integration to ensure robust payment processing. Resolved critical bugs and improved application reliability. Set up comprehensive application monitoring to track performance and identify issues.
Full Stack Developer at QONTO
December 1, 2021 - April 1, 2023
Contributed to the 2022 rebranding and enhanced the technical ecosystem: Built a new CMS and developed new features tailored to business needs. Set up a complete CI/CD pipeline (GitLab CI, jobs, review apps, staging) to streamline deployments. Optimized performance through image compression and metadata/schema enhancements. Migrated the Penta website to the new CMS. Maintained and improved code quality with refactoring and automated testing (RSpec, Capybara). Developed and integrated new CMS modules. Established monitoring systems to ensure application reliability and performance.
Full Stack Developer at OCTO Technology
September 1, 2019 - September 1, 2021
Maintenance of internal Ruby on Rails applications and development of new features: Built new features to meet evolving business needs. Redesigned the front-end by transitioning from jQuery to React, modernizing the interface and improving performance.
Front End Developer at Homeys
July 1, 2019 - September 1, 2019
Redesigned the company website and application: Front-end integration using HTML/CSS, Bootstrap, Jekyll, and JavaScript. Developed interactive features, including: Dynamic charts for data visualization (Chart.js). Advanced date and period management (Moment.js, Datepicker). Interactive maps and dynamic tables for data display (Mapbox, Data Table).

Education

Bachelor Web at HETIC Montreuil, France
October 1, 2018 - September 1, 2021
BTS Système numérique: Informatique et Réseau at Lycée Diderot, Paris, France
September 1, 2017 - July 1, 2018
Programme at Ecole 42 Paris, France
July 1, 2017 - May 13, 2026

Qualifications

Add your qualifications or awards here.

Industry Experience

Software & Internet, Professional Services, Media & Entertainment, Transportation & Logistics, Financial Services