Full-Stack App Developer (m/f/d)

This is who we are at SPLENDID RESEARCH

We are an international market research institute based in Hamburg, supporting clients from a wide range of industries in all aspects of their market research from a single source: from conception and data collection through to in-depth analysis.

For our own surveys as well as for studies conducted by partner institutes, we operate our own international participant and online panel. Participants in over 70 countries can take part in our surveys not only online, but also conveniently via our MOBROG app.

What unites us at SPLENDID is our curiosity as researchers and our passion for results that create real value for our clients.

Our team is made up of motivated, skilled, and highly qualified people. At SPLENDID RESEARCH, bright minds from a wide variety of fields find an employer that enables them to fully develop their own potential. Innovation and creative freedom are highly valued here.

We stand for team spirit, personal responsibility, and efficiency. These values define who we are and are shared with all new Splendid colleagues from the very first moment. In addition to the right values, we offer varied, interesting, and challenging tasks, the opportunity to work in a growing team, room for your own ideas as well as further training opportunities, performance-based compensation, and many additional benefits.

Do you feel SPLENDID? Then come on board!

About the Role

We are looking for a talented and driven Full-Stack App Developer to take full ownership of the MOBROG application. You will be responsible for developing and maintaining both the front-end and back-end of our mobile platform, while continuously shipping high-impact features that directly drive business growth. This is a high-ownership role for someone who thrives in a fast paced environment and takes pride in building polished, scalable products.

• Own the end-to-end development of the MOBROG mobile app, from front-end implementation to backend architecture
• Build and maintain cross-platform mobile applications using Flutter
• Design and manage relational and NoSQL databases, with a strong focus on Firebase (Firestore, Authentication, Cloud Functions, Storage)
• Write and optimize SQL queries and manage structured data layers
• Architect and implement push notification systems (FCM and equivalent services) for user engagement and retention
• Develop supporting web interfaces and internal tooling using JavaScript and modern web frameworks
• Identify and deliver new app features with measurable business impact — from scoping to production
• Monitor app performance, crash reporting, and analytics to drive continuous improvement
• Ensure app security, data integrity, and compliance with platform guidelines (iOS & Android)
• Collaborate with stakeholders to translate business requirements into technical solutions

• Proficiency in Flutter & Dart for cross-platform mobile development
• Strong knowledge of Firebase (Firestore, Auth, Cloud Functions, Hosting, FCM)
• Solid SQL skills and experience with relational database design
• Experience building and consuming REST APIs
• JavaScript proficiency for web and backend scripting
• Familiarity with push notification infrastructure and delivery systems
• Experience with version control (Git) and CI/CD pipelines
• Understanding of mobile app deployment on Google Play Store and Apple App Store

What We're Looking For

You are a self-starter who can navigate ambiguity, make smart architectural decisions independently, and deliver results with a high bar for quality. You think like a product owner, ship like an engineer, and always have the end user in mind.

• Experience with web development
• Product thinking — ability to define, prioritize, and scope features
• Familiarity with cloud platforms (GCP, AWS, or Azure)
• Experience with app performance optimization and profiling tools

JCPL1_DE