Senior Mobile Engineer (all genders)

Job-ID: 2685538Company: Kaufland e-commerce Services GmbH & Co. KGDepartment: Tech & ProductCategory: TechLocation: Remote oder Köln / Darmstadt / Düsseldorf / BerlinEmployment: Festanstellung, Voll- oder TeilzeitSeniority: BerufserfahrenExperience: 2-5 yearsPosted: 2026-06-24AnstellungsdetailsPermanent contract, Full or Part-Time, Remote or Cologne / Darmstadt / Düsseldorf / BerlinInfoWho we areWe are the tech powerhouse behind Kaufland’s international online marketplaces and a company within the Schwarz Group. Driven by a start-up mentality and working on an equal footing within flat hierarchies, we develop the best marketplace solutions for our customers, sellers and partners. #FromEuropeForEuropeDay by day, our Tech & Product Team of about 400 experts pursues the goal of creating the best possible customer shopping experience for our online marketplace. Through innovative technical developments, they not only create an outstanding shopping experience but also lay the foundation for an optimal selling experience for our sellers. Learn more about our division, areas, and cross-functional teams here!AufgabenYour tasks – this is what awaits you in detailYou'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 featuresYou'll 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 termYou'll 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 StoreYou'll debug and investigate complex issues end to end across system boundaries – native code, webviews, and the web frontend – working closely with backend and frontend engineersYou'll collaborate in an unusually rich setup: cross-team, cross-area, and cross-company, since our marketplace is integrated directly into the Kaufland retail appThe team's scope is growing beyond pure mobile: you'll have the opportunity to work on backend services owned by the team, expanding your skill set into new technologiesTogether with product managers and designers, you'll shape data-driven, hypothesis-based product experiences validated through A/B testingOur app serves millions of users, so you'll share responsibility for keeping it observable, stable, and scalable in productionProfilYour profile – this is what we expect from youSolid experience in Swift and/or Kotlin, with the flexibility to work across both platforms, and a strong understanding of modern mobile engineering practicesExperience building and maintaining projects in a modular architecture setup, and confidence navigating and debugging large, complex codebasesA systems-thinking mindset: you enjoy investigating problems that span multiple layers and technologies more than polishing pixelsBackend development experience – or a genuine drive to learn quickly; our backend stack is TypeScript with NestJS, and curiosity matters more to us than ticking every boxStrong grasp of TDD principles and a commitment to clean, well-tested, maintainable codeAn analytical mindset and a strong sense of ownership for your software in production: observability, monitoring, and learning from real usage data are part of your definition of doneYou balance shipping value today with technical decisions that will still hold in two years – we evolve a platform, not just featuresAI tools are already a natural part of how you work and build softwareFluent in English (C1) and comfortable in a dynamic, international environmentBonus points – nice to have, not required:Experience developing and distributing mobile SDKsKnowledge of cross-platform technologies, especially Kotlin Multiplatform (KMP)Ability to read and debug TypeScript code when investigating cross-system issuesFamiliarity with A/B testing concepts and correct experiment implementation (we use Optimizely)Hands-on experience with observability tooling such as DataDogBenefitsWhat we offerCreate your own work-life balance: You have the flexibility to choose between working remotely (within Germany) or from one of our locations in Cologne, Darmstadt, Düsseldorf, or in Berlin!Do you want to move to Germany? No problem – we offer you an attractive relocation package to give you a smooth start. Urban Sports Club and RSG Group Fitness Studios: Get top deals for fitness, swimming, yoga and moreMental Well-Being: We support you on your well-being journey with special offerings such as Instahelp, the digital platform for online psychological counselingVacation & Sabbatical: Enjoy 30 days of vacation per year and the opportunity to take a sabbatical once you have been part of the team for a certain period!Option for Pluxee restaurant vouchers: Buy Pluxee vouchers through us and benefit from tax-advantaged meal allowances!‘Deutschlandticket’: We subsidize your train season ticket for more mobilityEmployee Discount: You will receive a monthly coupon for Kaufland.deFree choice of hardware: Mac or Lenovo, it’s up to youBoost your growth: Benefit from our online language learning programs, diverse in-house training, and our automated 360-degree feedback. We cover the costs for relevant conferences, training opportunities, and approved team workshops to strengthen personal interactionsThis is who we are: 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.We are team players: From day one, you will connect not only with your team but also with others through our digital onboarding journey, the buddy program, and regular team and company events, all-hands meetings, powerful mornings, and much more!Check out our Principles & our blog for even more insights into our company culture!BewerbenDiversity at Kaufland e-commerceWe welcome applications from everyone, regardless of skin colour, sexual orientation, gender identity, age, disability, ethnic origin, religion and ideology. We are signatories to the Charta der Vielfalt (German Diversity Charter) – because we know that extraordinary things can only be achieved with diversity. Read more here! When applying, you can optionally include your pronouns in your resume.Why are you the perfect fit for this position?Don't bother with cover letters - we're interested in facts and figures! Feel free to share your Github profile with us in your application.As we have very international teams, we would highly appreciate it to receive your CV or profile link in English.We are looking forward to your application!Kaufland e-commerce Services GmbH & Co. KGPostal address:Habsburgerring 250674 KölnAnsprechpartnerYour contact person: Kristina Heymann