iOS Developer Internship – 6 months - Paris - F/HAre you passionate about iOS development and eager to build real features with an experienced team? Join Karos for a 6-month internship (Starting between December 2025 and March 2026) and help us evolve our iOS app — connecting thousands of daily carpoolers and accelerating the shift toward sustainable mobility.
Under the guidance of our Mobile team, you will:
Develop and refine user interfaces using SwiftUI, with a strong focus on performance, design fidelity, and accessibility.
Write and maintain unit and UI tests to ensure code quality and reliability.
Contribute to architectural decisions, refactoring, and continuous codebase improvement.
Collaborate closely with backend, design, and product teams to ship impactful updates to real users.
Learn and apply best practices in Swift, SwiftUI, and testing frameworks, while contributing to the continuous improvement of our mobile stack.
Final-year Master’s student in Computer Science or related field.
Strong foundation in Swift and iOS fundamentals (UIKit, SwiftUI, Combine, etc.).
Interest in modern iOS design patterns and scalable app architecture.
Familiarity with unit testing (XCTest, snapshot testing).
Curiosity, autonomy, and eagerness to learn from senior engineers and build for real users.
Collaborative mindset and curiosity for mobile architecture and performance optimization.
Bonus: experience with CI/CD (GitHub Actions, Fastlane) or API integration.
By joining Karos, you’ll take part in real-world app development and learn how to deliver features from design to App Store.
Hands-on experience in a fast-paced, mission-driven startup.
Mentorship from senior iOS developers and product designers.
Deep dive into SwiftUI and modern testing tools.
The opportunity to build and ship features used daily by thousands of users.
Insight into how technology can drive sustainable mobility and reduce carbon impact.
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.