Front End Developer Internship - 6 months - Paris - W/M/NB

Join Karos, a company dedicated to sustainable mobility, as a Front End Developer Intern for a 6-month internship in Paris. You will work closely with the Front-End team to refactor and modernize pages and features, create new modular components, and help transition the code from JavaScript to TypeScript. This is a great opportunity for final-year Master's students in Computer Science or related fields to gain real-world app development experience and learn from senior engineers.

• Participer à la refonte et à la modernisation des pages et des fonctionnalités de l'application Front-End.
• Créer de nouveaux composants modulaires et refactoriser ceux existants, en aidant à la transition du code de JavaScript à TypeScript.
• Collaborer avec l'équipe pour livrer des fonctionnalités réelles utilisées quotidiennement par les utilisateurs.

**What we’re looking for**

• Final-year Master’s student in Computer Science or related field.
• Strong foundation in Front-end and JavaScript/TypeScript **fundamentals** (promises, try/catch, basic array methods, event loops, type generics etc.).
• Interest in **modern Front-End design patterns** and scalable app architecture.
• Familiarity with **unit testing (and ideally component testing)**.
• Curiosity, autonomy, and eagerness to **learn from senior engineers** and **build for real users**.
• Collaborative mindset and curiosity for Front-End architecture and performance optimization.
• Bonus: experience with **CI/CD (GitHub Actions)** or API integration, experience with a backend language and framework.

• **What you’ll gain**
• By joining Karos, you’ll take part in **real-world app development** and learn how to deliver features from **design to Live**.

• **Ship real product**: contribute to user-facing features used daily
• **Learn from our team** through code reviews, pairing, and mentorship from frontend and backend engineers
• Grow your **Vue 3 + TypeScript skills**
• **Develop strong engineering habits**: testing practices, CI/CD exposure, and clean refactoring in a production codebase

### Additional Information 🚗🌱

• A **warm, inclusive, and supportive team**
• Offices **centrally located in Paris** and easily accessible
• 💚 At Karos, we believe short-distance carpooling can become a new form of public transport — and we’re building it together.

Join us to **create a sustainable mobility future**.