Machine learning engineer Jobs in Düsseldorf

Anstellungsdetails

Permanent contract, Full or Part-Time, Remote or Cologne / Darmstadt / Düsseldorf / Berlin

Info

Who we are

We 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. #FromEuropeForEurope

Day 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!

Aufgaben

Your tasks – this is what awaits you in detail

• 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

• You'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 term

• You'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 Store

• You'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 engineers

• You'll collaborate in an unusually rich setup: cross-team, cross-area, and cross-company, since our marketplace is integrated directly into the Kaufland retail app

• The 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 technologies

• Together with product managers and designers, you'll shape data-driven, hypothesis-based product experiences validated through A/B testing

• Our app serves millions of users, so you'll share responsibility for keeping it observable, stable, and scalable in production

Profil

Your profile – this is what we expect from you

• 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: you enjoy investigating problems that span multiple layers and technologies more than polishing pixels

• Backend 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 box

• 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: observability, monitoring, and learning from real usage data are part of your definition of done

• You balance shipping value today with technical decisions that will still hold in two years – we evolve a platform, not just features

• 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

• Bonus points – nice to have, not required:

• Experience developing and distributing mobile SDKs

• Knowledge of cross-platform technologies, especially Kotlin Multiplatform (KMP)

• Ability to read and debug TypeScript code when investigating cross-system issues

• Familiarity with A/B testing concepts and correct experiment implementation (we use Optimizely)

• Hands-on experience with observability tooling such as DataDog

Benefits

What we offer

• Create 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 more
• Mental Well-Being: We support you on your well-being journey with special offerings such as Instahelp, the digital platform for online psychological counseling
• Vacation & 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 mobility
• Employee Discount: You will receive a monthly coupon for Kaufland.de
• Free choice of operating system: MacOS or Ubuntu Linux, it's up to you
• Boost 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 interactions
• This 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!

Bewerben

Diversity at Kaufland e-commerce

We 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. KG
Postal address:
Habsburgerring 2
50674 Köln

Ansprechpartner

Your contact person: Kristina Heymann