Senior Mobile Engineer (Flutter + Native)

About the Role At Doodle, we are dedicated to solving time and unleashing people's growth. We are looking for a Senior Mobile Engineer with deep expertise in Flutter and strong proficiency in Android (iOS is nice-to-have). This role is critical for scaling our mobile platform, where you will be responsible for building high-quality, performant, and cross-platform features using Flutter, while leveraging your native expertise to bridge the gap and optimize specific platform functionalities. You'll work closely with product and design teams to translate complex requirements into beautiful, fast, and reliable mobile experiences. Key Responsibilities Cross-Platform Feature Development : Design, build, and maintain features across our mobile applications using Flutter and the Dart language, ensuring a consistent experience across iOS and Android. Native Integration & Optimization : Utilize your expertise in Android (Kotlin / Java) (and potentially iOS with Swift / Objective-C) to write native code for platform-specific modules, custom plugins, or performance-critical optimizations that cannot be achieved solely in Flutter. API Communication : Implement and manage efficient data communication with our backend services using GraphQL (and potentially REST), ensuring robust error handling and smooth data flow. Code Quality & Standards : Write clean, well-tested, and maintainable code; participate actively in code reviews, and help define and enforce best practices for mobile development (Flutter and native). Collaboration : Partner with Backend Engineers to define effective GraphQL schemas and with Product / Design to ensure technical feasibility and optimal user experience. Mentorship : Provide technical guidance and knowledge sharing to more junior engineers on Flutter development, architecture patterns, and native integration techniques. Required Technical Qualifications Experience : 5+ years of professional software engineering experience, with at least 3+ years focused on mobile application development and a track record of successfully launching and maintaining production apps. Core Technology : Expert-level proficiency in Flutter and Dart . Strong proficiency in at least one native platform, preferably Android (Kotlin / Java) , and optionally iOS (Swift / Objective-C) . Data Communication : Deep, practical experience integrating mobile applications with backend services using GraphQL (e.g., Apollo, GraphQL-Flutter) and understanding its benefits and best practices. Architecture : Proven experience applying modern mobile architectural patterns (e.g., Provider, Bloc / Cubit, Riverpod, MVVM, Redux) to build scalable and maintainable Flutter applications. Tools & Testing : Experience with state management, dependency injection, mobile performance profiling, and implementing comprehensive unit and widget testing in Flutter. What you will achieve Deliver a world-class mobile experience that delights users on their iPhones and other Apple devices. Bring cutting-edge features to market that leverage the latest iOS and wearable technologies. Establish and advocate for best practices in iOS development, becoming a key contributor to our engineering culture. Hiring Journey Initial Application Review Personality & Strengths Assessment (via BRYQ) Home Assignment Technical Interview Meet the Team / Hiring Manager Culture Fit Conversation Final Offer & Next Steps Why Doodle? Impact : Your work will directly influence millions of users globally, helping them manage their Time more effectively. Innovation : We're pushing the boundaries of scheduling, working on unique challenges related to Time that will stretch your engineering capabilities. Culture : A supportive, collaborative, and inclusive environment where curiosity is encouraged and contributions are valued. Growth : Opportunities for continuous learning, professional development, and career advancement. At Doodle, we’re committed to providing an environment of mutual trust and respect, where equal employment opportunities (EEO) are available to all applicants and teammates without regard to age, race, color, disability, religion, gender, and sexual orientation. Diversity and inclusion are of utmost importance to us. We’re committed to building a team that represents a variety of backgrounds, perspectives, and skills. The more inclusive we are, the better our work and our products will be. We want to hear from you, so please don’t hesitate to apply!We look forward to receiving your full application. IMPORTANT NOTICE : Please note that we can only consider your application if you are based and have the right to work in Spain. At this time, we are unable to sponsor visa for this position or support with relocation.