[Hiring] Senior Mobile Engineer @Kaufland e-commerce

Role Description

You'll join a platform-oriented mobile team that owns the architecture powering the marketplace experience inside the Kaufland app. Most of our challenges are not native UI work: they're about webview architecture, cross-system communication, and scalability – while we still build and maintain selected fully native features.

• Help shape how the marketplace is integrated into the Kaufland app, working on a modular, SDK-oriented architecture designed to be maintained and evolved over the long term.
• Take ownership of the entire feature lifecycle – from concept and design to implementation, testing, release, and monitoring in the Apple App Store and Google Play Store.
• Debug and investigate complex issues end to end across system boundaries – native code, webviews, and the web frontend – working closely with backend and frontend engineers.
• Collaborate in an unusually rich setup: cross-team, cross-area, and cross-company, since our marketplace is integrated directly into the Kaufland retail app.
• Work on backend services owned by the team, expanding your skill set into new technologies.
• Shape data-driven, hypothesis-based product experiences validated through A/B testing together with product managers and designers.
• Share responsibility for keeping the app observable, stable, and scalable in production, serving millions of users.

Qualifications

• Solid experience in Swift and/or Kotlin, with the flexibility to work across both platforms, and a strong understanding of modern mobile engineering practices.
• Experience building and maintaining projects in a modular architecture setup, and confidence navigating and debugging large, complex codebases.
• A systems-thinking mindset: enjoy investigating problems that span multiple layers and technologies.
• Backend development experience – or a genuine drive to learn quickly; our backend stack is TypeScript with NestJS.
• Strong grasp of TDD principles and a commitment to clean, well-tested, maintainable code.
• An analytical mindset and a strong sense of ownership for your software in production.
• Balance shipping value today with technical decisions that will still hold in two years.
• AI tools are already a natural part of how you work and build software.
• Fluent in English (C1) and comfortable in a dynamic, international environment.

Requirements

• Experience developing and distributing mobile SDKs (bonus).
• Knowledge of cross-platform technologies, especially Kotlin Multiplatform (KMP) (bonus).
• Ability to read and debug TypeScript code when investigating cross-system issues (bonus).
• Familiarity with A/B testing concepts and correct experiment implementation (we use Optimizely) (bonus).
• Hands-on experience with observability tooling such as DataDog (bonus).

Benefits

• Create your own work-life balance: flexibility to choose between working remotely (within Germany) or from one of our locations in Cologne, Darmstadt, Düsseldorf, or Berlin.
• Attractive relocation package for those moving to Germany.
• Top deals for fitness, swimming, yoga and more through Urban Sports Club and RSG Group Fitness Studios.
• Support on your well-being journey with special offerings such as Instahelp, the digital platform for online psychological counseling.
• Enjoy 30 days of vacation per year and the opportunity to take a sabbatical after a certain period.
• Subsidized Pluxee restaurant vouchers for tax-advantaged meal allowances.
• Subsidized train season ticket for more mobility ('Deutschlandticket').
• Monthly coupon for Kaufland.de as an employee discount.
• Free choice of hardware: Mac or Lenovo.
• Benefit from online language learning programs, diverse in-house training, and automated 360-degree feedback.

Company Description

Our dynamic culture combines flat hierarchies, a start-up mentality, an international team of over 65 nationalities, and the strength of the Schwarz Group to provide you an agile and secure working environment.