1&1 | Germany | 76xxx Karlsruhe | Student job | Part time - flexible / Home office | Published since: 21.01.2026 on stepstone.de
Working Student - Software Development Core Customer App Android (m/f/d)
1&1 is one of the leading telecommunications providers in Germany with over 3,200 employees and nearly 16 million customer contracts. With pioneering spirit, unusual ideas and creative teams, we have won a leading market position in mobile and broadband connections. By combining the over 50,000 km long 1&1 fiber optic network and regional networks, we create Germany's most extensive fibre network. We also build the most modern 5G network in Europe, based on the new Open-RAN technology. With open interfaces and 5G functions in a powerful cloud infrastructure. Continue the 1&1 success story by designing the future through the deployment and development of innovative technologies. Be part of 1&1. .
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Your tasks • Your profile • What we offer
Working with the Customer App Development team on 1&1 apps with more than 2.4 million. Users Conception and development of features around Smarthome and WLAN analysis Active support for migration (e.g. Compose/SwiftUI, MVVM, Kotlin) Mitgestaltung bei Feature-Migrationen, UI-Testen und CI/CD-Optimieren Bringing your own ideas and taking responsibility into exciting topics Continuous learning in a modern, technology-driven environment
Registered student in the field of computer science, software development or comparable First experience in mobile app development (Android of advantage, no need) Individual initiative, independent working and team spirit Interest in new technologies and trends in mobile development flowing knowledge of English, good knowledge of German Availability of at least 15 hours per week
Attractive salary Strong community of team players Confidential working time with flexible classification and the possibility of working up to 40% mobile Numerous training options on and offline Discounts on 1&1 products and for various leisure offers In-house restaurant Free drinks and fresh fruit
Location
 | 1&1 | |
| 76137 Karlsruhe | ||
| Germany |
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