Senior Frontend Engineer - Mobile Apps

Senior Frontend Engineer - Mobile Apps

Merkle, a dentsu company, powers the experience economy. For more than 35 years, the company has put people at the heart of its approach to digital business transformation. Merkle's expertise has earned recognition as a "Leader" by top industry analyst firms, in categories such as digital transformation and commerce, experience design, engineering and technology integration, digital marketing, data science, CRM and loyalty, and customer data management. With more than 16,000 employees, Merkle operates in 30+ countries throughout the Americas, EMEA, and APAC. For more information, visit www.merkle.com.

Who Are We Looking For?

We are looking for a skilled and motivated Senior Frontend Engineer - Mobile Apps to join our cross-functional digital product team. You will play a key role in building and maintaining our customer-facing applications — spanning iOS, Android. You will work closely with UX designers, backend engineers, and product owners to deliver seamless, high-quality experiences that meet the highest standards for accessibility, security, and performance.

Key Responsibilities:

• Design, develop, and maintain frontend features for our iOS and Android mobile applications
• Implement and extend multilingual (DE/FR/IT/EN) user interfaces using internationalisation (i18n) frameworks and localisation best practices
• Collaborate with UX/UI designers to translate Figma designs into pixel-perfect, accessible components
• Ensure code quality through unit testing, integration testing, and code reviews
• Optimise application performance across devices and screen sizes, with a focus on Swiss banking security standards
• Contribute to the shared component library and design system used across all Raiffeisen digital products
• Work in an agile team using Scrum/Kanban, participating in sprint planning, retrospectives, and demos
• Coordinate with backend teams to design and consume RESTful and GraphQL APIs
• Monitor, debug, and resolve issues in production, ensuring high availability and user satisfaction
• Stay up to date with emerging frontend technologies and champion best practices within the team

Your Profile:

Required Skills & Experience:

• 3+ years of professional experience in frontend or mobile development
• Proficiency in React Native for cross-platform iOS and Android development
• Strong command of TypeScript and modern JavaScript (ES6+)
• Experience with React.js or a comparable modern web framework (Vue, Angular)
• Solid understanding of iOS and Android platform guidelines (HIG / Material Design)
• Practical experience with i18n/l10n libraries (e.g. i18next, react-intl, FormatJS)
• Familiarity with state management solutions (Redux, Zustand, MobX, or similar)
• Experience with RESTful APIs and GraphQL
• Understanding of CI/CD pipelines and version control (Git)
• Knowledge of web accessibility standards (WCAG 2.1 AA)

Nice to Have:

• Experience in regulated industries, particularly financial services or banking
• Familiarity with Swift/SwiftUI or Kotlin/Jetpack Compose for native development
• Knowledge of micro-frontend architectures
• Experience with security-conscious development (OWASP, certificate pinning, biometric auth)

Languages:

• German: Fluent (B2 or above) — working language of the team
• English: Business proficient
• French or Italian: Advantageous, given our multilingual product scope

Why Choose dentsu?

Global Reach with Local Expertise: Join a network that spans 145 countries, with over 70,000 talented employees. Collaborate with bright minds worldwide and gain insights from diverse industries and markets.Innovation at Our Core: For over 120 years, we have been pushing boundaries to connect brands with their audiences through cutting-edge technology, creativity, and transformative solutions.Commitment to Impact: We focus on driving meaningful outcomes for our clients and their communities, whether through increasing revenue, influencing behavior change, or fostering positive organizational culture.Collaborative Network: Work alongside six global brands all united in delivering highly integrated and scaled transformation solutions.

These are some of the things we offer:

? 25 days of holidays? 2 volunteer days for charitable activities? Mental Health: Benefit from 3 extra wellness days on top of your vacation days and a Mental Health First Aider and Employee Assistance program to support your well-being?40-hour week & overtime compensation⏰ Flexible working hours model (flextime)? Independent home office management?State-of-the-art, creative office space with ergonomically equipped workstations? Pet friendly offices (Zurich and St. Gallen)? Full access to Dentsu Academy, on-site learning sessions, online language courses? Referral bonus program Workation possibility? Team events: company parties, monthly breakfasts, aperos

Location: Zürich

Brand: Merkle

Time Type: Full time

Contract Type: Permanent