Frontend Engineer - Mobile Applications

A leading global financial services client is looking for an experienced Frontend Engineer to join them, building high-quality, scalable mobile experiences. You’ll play a key role in crafting sleek, high-performance applications used by customers at scale, working in a fast-paced, agile environment.

This is an opportunity to work on complex, production-grade mobile apps while collaborating within small, autonomous teams that value ownership, quality, and innovation.

Key Accountabilities and Deliverables:

• Design and build modern, high-performance mobile applications
• Develop clean, scalable, and testable code
• Collaborate closely with product, design, and backend teams
• Contribute to architecture decisions and technical improvements
• Implement and maintain automated tests and CI/CD pipelines
• Continuously improve app performance, reliability, and user experience

Key Skills and experience:

• Several years of experience as a Software Engineer working with:
• Flutter, or Native mobile (iOS / Android), or React Native
• Strong experience with Flutter ecosystem, libraries, and lifecycle
• Passion for building exceptional user experiences
• Proven experience shipping complex mobile applications to production
• Strong focus on testability and automated testing
• Experience with CI/CD, automation, and developer tooling
• Comfortable working in small, agile, autonomous teams

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• Experience within payments/banking applications is highly desirable

Tech Stack:

We use a modern, highly modular Flutter-based architecture:

• Flutter & Dart (latest versions)
• Modular architecture with reusable packages (“Lego block” approach)
• Large-scale codebase: 300+ packages, ~2M lines of code managed with Melos

State Management & Architecture

• flutter_bloc, get_it, injectable

Navigation

• auto_route, flow_builder

Networking & Data

• freezed, json_serializable, retrofit, dio interceptors

Tooling & Code Generation

• mason, build_runner

Localization

• i69n

Testing

• Strong focus on BDD (Behaviour Driven Development)
• bdd_widget_test

Observability & Feature Management

• Firebase Suite, DataDog, LaunchDarkly, Segment

CI/CD

• GitHub & GitHub Actions
• Weekly release cycles

Fully remote

€300 per day

6 months initially