Senior iOS Developer, AdTech (m/f/d)

Redcare Pharmacy; Köln; On-site; EUR 70,000 - 110,000; Full time

Benefits offered by this job

Urban Sports Club

Mental health support

Work from home up to 20 days/year (EU)

Deutschland Ticket

Job summary

Redcare Pharmacy in Köln, Germany, seeks a Senior iOS Engineer to lead the next generation of Retail Media experiences within our mobile platform. You will design scalable iOS software and work with product, design, backend, and data science to deliver personalized recommendations and sponsored products across Europe.

You will own modular architecture, implement feature flags, AB testing, and improve CI/CD while mentoring peers and reducing technical debt to maintain a best-in-class shopping

Qualifications

• Strong Swift expertise with production iOS apps.
• Experience with MVVM and Clean Architecture.
• Knowledge of cross-platform concepts (KMP) is a plus.

Responsibilities

• Drive modular iOS architecture and scalability.
• Define and refine technical standards and guidelines.
• Build reusable components for Retail Media experiences.
• Improve CI/CD reliability and release processes.
• Strengthen testing strategy and quality foundations.
• Collaborate across teams on architecture decisions.

Skills

Swift

MVVM

Clean Architecture

CI/CD

Performance optimization

Tools

KMP (cross-platform)

Android

Job description

About Redcare Pharmacy

As Europe’s No.1 e-pharmacy, Redcare Pharmacy is powered by passionate teams and cutting-edge innovation. We strive to create a healthy, collaborative work environment where every employee feels valued and inspired to contribute to our vision “Until every human has their health”. If you’re seeking a career that offers purpose and aligns with your values, join us and begin your #Redcareer today.

About the role

As a Senior iOS Engineer, you will play a key role in building the next generation of Retail Media experiences within the Redcare mobile platform. Working as part of a cross‑functional product team, you will design and build scalable mobile experiences that seamlessly integrate sponsored products, personalized recommendations, native advertising, and campaign‑driven customer journeys while maintaining a best in class shopping experience. You will have high visibility and a direct impact on how our iOS ecosystem evolves as we scale. You’ll collaborate closely with Product Managers, Designers, Backend Engineers, Data Scientists, and Retail Media stakeholders to deliver performant, scalable, and customer‑centric mobile solutions used by millions of customers across Europe.

About your tasks

• Drive modularization and continuously evolve a scalable iOS architecture.
• Define, implement, and refine technical standards and architectural guidelines.
• Build reusable mobile components for Retail Media experiences, including Sponsored Products, Sponsored Brands, product recommendations, banners.
• Improve CI/CD reliability, build performance, and release processes.
• Strengthen testing strategy and establish strong quality foundations across teams.
• Improve app stability, performance, and overall technical health.
• Review and guide critical architectural decisions across multiple teams.
• Reduce technical debt strategically while enabling product teams through platform improvements.
• Implement feature flags, experimentation, and A/B testing to validate new customer experiences.

Qualifications

• You have strong expertise in Swift and experience working on large‑scale production apps.
• Experience building cross‑platform application in KMP and Android experience is additional add‑on.
• You bring deep understanding of modular architecture and scalable app structures.
• You have hands‑on experience with Clean Architecture, MVVM, or similar patterns.
• You understand modern concurrency concepts and memory management in iOS.
• You have solid experience with unit testing and improving test coverage.
• You have worked with CI/CD pipelines and understand release processes.
• You collaborate effectively across teams and bring strong debugging and performance optimization skills.
• Experience working in Retail Media, AdTech, MarTech large‑scale e‑commerce platforms.

Additional Information

In order to provide our employees with the best possible support for their individual needs, we offer a wide range of benefits:

• Sports: Stay healthy. Profit from a membership (M) package at Urban Sports Club, so that you can take advantage of a huge variety of sport offers.
• Mental Health: Get quick and professional help from psychologists of Likeminded if you feel overwhelmed in private or professional life. Anonymous and free of charge.
• Work from Home: If your job does not require you to be present in the office, we can arrange the place you work from individually - even for up to 20 days a year anywhere in the EU.
• Mobility: We provide our employees with a fully costed Deutschland Ticket which can be used at any time. Click here to learn more.
• Personal development: Grow! We support and encourage your individual development through various in- and external trainings.
• And many more :)