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Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Fullstack Mobile Developer - **Company:** NS Groep N.V. - **Location:** UTRECHT, Netherlands (Remote available) - **Experience:** Experienced - **Salary:** €3,743.0 - €6,491.0 - **Contract:** Permanent contract - **Skills:** Multitier Architecture, Application Programming Interfaces (APIs), IOS Applications, Automation of Tests, Mobile Application Development, Code Coverage, DevOps, Scrum Methodology, Mendix, Software Engineering, Swiftui, Backend, Kotlin, Information Technology, Jetpack Compose, Asynchronous Programming, Serverless Computing, OpenSearch - **Published:** October 19, 2026 - **Apply:** https://www.werkenbijns.nl/vacatures/fullstack-mobile-developer-android-ios-utrecht-1344908/solliciteer ## About the Role * A Bachelor's or Master's degree in Software Engineering, Computer Science, or a related field. * At least 2 years of experience developing Android and/or iOS applications in a Scrum or DevOps environment. * Experience with: + Android: Kotlin, Kotlin Coroutines, and Jetpack Compose. + iOS: Swift, SwiftUI, and Combine. * Experience with Clean Architecture. * Experience with automated testing. * Knowledge of modern software engineering principles and best practices. * Strong communication skills. * A proactive, curious, and results-oriented mindset. * Fluency in either Dutch or English., * A background screening, including a Certificate of Conduct (VOG), is part of the recruitment process. This also includes signing integrity and confidentiality agreements. ## Description * You will work on the NS app, used by more than 4 million travelers every month. * You will be part of an innovative DevOps team with plenty of freedom, ownership, and room to experiment with new technologies. * You will build digital products that directly impact the daily travel experience of millions of passengers. "At NS, you have the opportunity to make a real impact at scale. Together with passionate colleagues, you develop innovative mobility solutions that help millions of travelers every day." What will you do as a Fullstack Mobile Developer? As a Fullstack Mobile Developer, you will join Team Map and contribute to the continued development of the NS app across both Android and iOS platforms. Together with UX designers, business analysts, developers, and the Product Owner, you will create intuitive digital experiences that improve the journey of millions of travelers. Your expertise and passion for mobile development will help shape new features while continuously improving existing functionality., * Developing and maintaining features for both Android and iOS applications. * Building user-friendly solutions for journey planning, booking flows, mobility services, and customer interactions. * Translating functional and business requirements into scalable technical solutions. * Writing high-quality, maintainable code and improving existing codebases. * Increasing the quality, reliability, and scalability of the NS app. * Implementing automated tests and maintaining strong code coverage. * Contributing to architectural decisions and engineering best practices. * Working closely with your DevOps team in an Agile/Scrum environment. Hier ga je werken You will join Team Map, part of the Passenger Experience domain at NS. The team plays an important role in connecting train travel with additional mobility services such as OV-fiets, parking solutions, and shared mobility providers. The team consists of: * Mobile Developers (Android & iOS) * Backend Developers * Business Analysts * Scrum Master * Product Owner Together, you develop digital mobility solutions that support travelers before, during, and after their journey. You can work hybrid from our modern headquarters next to Utrecht Central Station or from home. In addition, you will become part of the wider NS mobile community, where Android and iOS developers regularly exchange knowledge, discuss technical challenges, and shape the future of mobile development within NS. Help us connect every part of the passenger journey Team MAPS develops the technology behind shared and integrated mobility at NS. From booking shared vehicles and taxis through MAAS-API and APP-TAXI-BFF-API, to mobility options and Greenwheels registration via MODALITY-API/BFF. Our landscape also includes the serverless SHARED-INTEGRATED-MOBILITY-BOOKING, the Mendix application DELTA, and PLACES-API with OpenSearch for stops, OV-fiets, parking and station information. STATION-FACILITIES-STATUS-API adds facility status data, while NEAR-ME helps travellers discover nearby mobility options, facilities and departure times. Dit zijn de functie-eisen You are a driven mobile developer who enjoys collaboration, ownership, and continuous improvement.