Mobile Developer (Junior-Mid)

🏢 Summary: Opportunity for an experienced Mobile App Developer to build and enhance Android and cross-platform applications supporting digital identity and service delivery solutions. The role focuses on developing scalable, high-quality mobile products within an Agile, multidisciplinary team environment. 🗂️ Requirements: Several years of mobile development experience, Strong knowledge of Android development, Proficiency in Kotlin, Experience working in Agile teams, Ability to contribute to application architecture and performance improvements 📃 Skills: Android, Kotlin, ReactNative, Agile, Cloud 🏢 Description: We are looking for an experienced Mobile App Developer to join a global product team working on applications that support digital identity and service delivery solutions. The role involves developing and improving mobile applications, primarily on Android, as well as contributing to cross-platform solutions. You will collaborate with a multidisciplinary team in an Agile environment to build reliable, user-friendly, and scalable products. Key Responsibilities: Develop and maintain mobile applications Collaborate with designers, analysts, and developers Contribute to application architecture and performance improvements Ensure code quality and reliability Requirements: Several years of experience in mobile development Strong knowledge of Android development (Kotlin) Ability to work in a collaborative, Agile team Good communication skills Nice to Have: Experience with cross-platform technologies (e.g., React Native) Familiarity with modern development tools and cloud environments

🏢 Summary: Long-term remote B2B project for a Mobile Developer focused on native mobile application development using SwiftUI, iOS, and Kotlin. The role requires strong experience in native mobile apps and German language proficiency at B2 level or higher. The project starts in October 2026 with a minimum commitment of 4 working days per week. 🗂️ Requirements: Experience with native mobile application development, Strong knowledge of SwiftUI, Experience with Kotlin, German language proficiency at B2 level or higher, Availability for minimum 4 working days per week 📃 Skills: SwiftUI, iOS, Kotlin 🏢 Description: About the role We are looking for a Mobile Developer to join a long-term project focused on native mobile application development. Tech stack SwiftUI, iOS, Kotlin Requirements Experience with native mobile application development. Strong knowledge of SwiftUI (iOS). Experience with Kotlin. German language proficiency at B2 level or higher (C1 preferred). We offer B2B contract. Rate: 130–180 PLN/hour . Remote work. Long-term project Minimum commitment of 4 working days per week. Project start in October 2026. Recruitment process Screening interview. Client interview. Decision.

🏢 Summary: The offer is for a React Native Developer to design, implement, and optimize high-quality mobile applications for a Polish client. The role involves developing new features and maintaining existing products for both iOS and Android platforms. Work is primarily remote with occasional visits to Warsaw. 🗂️ Requirements: Minimum 3 years of experience in mobile application development, Strong knowledge of React Native for iOS and Android, Experience publishing and maintaining apps in App Store, Experience publishing and maintaining apps in Google Play, Ability to optimize mobile applications for performance on iOS and Android 📃 Skills: React, ReactNative, JavaScript, iOS, Android, AppStore, GooglePlay 🏢 Description: Dołącz do nas jako React Native Developer i twórz wysokiej jakości aplikacje mobilne dla polskiego klienta. Szukamy osoby, która sprawnie porusza się w ekosystemie iOS i Android. Zakres obowiązków: Projektowanie i implementacja aplikacji mobilnych w React Native. Optymalizacja aplikacji pod kątem wydajności na obu platformach (iOS/Android). Rozwój nowych funkcjonalności i utrzymanie istniejących produktów. Wymagania: Minimum 3 lata doświadczenia w tworzeniu aplikacji mobilnych. Bardzo dobra znajomość frameworka React Native dla iOS i Android. Doświadczenie w publikacji i utrzymaniu aplikacji w sklepach (App Store/Google Play). Praca zdalna z okazjonalnymi wizytami w Warszawie .

🏢 Summary: 6-month hybrid contract for an experienced Android Developer to design, build, and maintain high-performance Android applications within a collaborative team. The role focuses on developing new features, integrating APIs, optimizing performance, and ensuring code quality through best practices and reviews. Opportunity to contribute to impactful mobile projects with potential extension. 🗂️ Requirements: Minimum 5 years of Android development experience, Proficiency in Java, Proficiency in Kotlin, Experience with RESTful APIs, Experience with third-party libraries, Solid understanding of full mobile development life cycle, Knowledge of modern design patterns, Ability to design and develop high-performance Android applications, Experience in debugging and performance optimization 📃 Skills: Android, Java, Kotlin, REST, APIs, Libraries, DesignPatterns, MobileLifecycle 🏢 Description: We are seeking an experienced Android Developer with at least 5 years of experience in mobile application development. The ideal candidate will possess a strong background in building high-quality Android applications and have a solid understanding of the mobile ecosystem. This role offers an opportunity to contribute to exciting projects and further enhance your skills within a collaborative team environment. Bonus: Able to work during summer-time. Start: ASAP Length: 6 months with possible extension Location: Hybrid in Stockholm (must be located in Stockholm area) Main Responsibilities: As an Android Developer, your primary duties will include: Designing and developing high-performance Android applications. Collaborating with cross-functional teams to define and design new features. Ensuring the performance, quality, and responsiveness of applications. Identifying and fixing bugs to maintain an efficient system. Continuously discovering, evaluating, and implementing new technologies to maximize development efficiency. Participating in code reviews to ensure adherence to best practices. Maintaining up-to-date knowledge of mobile development trends. Key Requirements: Minimum 5 years of experience in Android development. Proficient in Java/Kotlin programming languages. Experience with RESTful APIs and third-party libraries. Solid understanding of the full mobile development life cycle. Familiarity with modern design patterns and best practices. Ability to work in a team-oriented environment. Strong problem-solving skills and attention to detail.

🏢 Summary: Offer for an Android Developer responsible for building, maintaining, and optimizing modern mobile applications on the Android platform. The role focuses on developing new features, improving existing solutions, and ensuring high code quality and performance. The position involves close collaboration with UX/UI, backend, and QA teams. 🗂️ Requirements: Experience in Android application development, Proficiency in Kotlin and/or Java, Knowledge of Android SDK, Understanding of Activity, Fragment, ViewModel, Experience with REST API integration, Proficiency with Git, Knowledge of clean code principles and best practices 📃 Skills: Kotlin, Java, AndroidSDK, Activity, Fragment, ViewModel, REST, Git 🏢 Description: Opis roli: Poszukujemy Android Developera, który dołączy do zespołu tworzącego nowoczesne aplikacje mobilne. Osoba na tym stanowisku będzie odpowiedzialna za rozwój, utrzymanie oraz optymalizację aplikacji na platformę Android, dbając o wysoką jakość kodu i dobrą wydajność aplikacji. Zakres obowiązków: Tworzenie i rozwój aplikacji mobilnych na system Android Utrzymanie istniejących rozwiązań oraz wdrażanie nowych funkcjonalności Współpraca z zespołem projektowym (UX/UI, backend, QA) Dbanie o jakość kodu, testy oraz optymalizację wydajności Analiza i rozwiązywanie problemów technicznych Wymagania: Doświadczenie w tworzeniu aplikacji na Androida Znajomość języków: Kotlin i/lub Java Znajomość Android SDK oraz podstawowych komponentów (Activity, Fragment, ViewModel) Umiejętność pracy z REST API Znajomość Git Zrozumienie zasad clean code i dobrych praktyk programistycznych Mile widziane: Doświadczenie z Jetpack (np. LiveData, Navigation, Room) Znajomość wzorców architektonicznych (MVVM, MVI) Doświadczenie z testami (unit / UI) Znajomość CI/CD Publikacje aplikacji w Google Play

🏢 Summary: Senior Mobile Engineer role focused on designing and delivering high-quality, scalable mobile applications for both iOS and Android in an international project. The position involves contributing to architecture decisions, ensuring performance and security, and maintaining code quality through best practices and testing. 🗂️ Requirements: 7+ years of mobile development experience, Strong experience with iOS development using Swift, Strong experience with Android development using Kotlin, Solid understanding of MVVM or Clean Architecture, Experience integrating RESTful APIs, Knowledge of mobile performance, scalability, and security best practices, Experience working with Agile methodologies (Scrum or Kanban) 📃 Skills: Swift, Kotlin, iOS, Android, MVVM, CleanArchitecture, REST, Performance, Scalability, Security, Agile, Scrum, Kanban 🏢 Description: We are looking for a Senior Mobile Engineer with strong experience in both iOS (Swift) and Android (Kotlin) to join an international project focused on building high-quality mobile applications. Main Responsibilities: Design, develop, and maintain mobile applications for both iOS and Android platforms Contribute to the architecture and technical decisions of mobile solutions Build scalable, high-performance, and user-focused applications Collaborate closely with Product Managers, Designers, and other Engineers Ensure code quality through best practices, code reviews, and testing Troubleshoot, debug, and optimize application performance Key Requirements: 7+ years of experience in mobile development Strong hands-on experience with: iOS (Swift) Android (Kotlin) Solid understanding of mobile architectures (e.g., MVVM, Clean Architecture) Experience integrating RESTful APIs Knowledge of mobile performance, scalability, and security best practices Experience with Agile methodologies (Scrum/Kanban) Strong problem-solving skills and attention to detail Good communication skills in English Nice to Have: Experience with cross-platform solutions (e.g., Kotlin Multiplatform, Flutter, React Native) Familiarity with CI/CD pipelines for mobile applications Experience with automated testing (unit/UI) Knowledge of mobile app distribution processes (App Store / Google Play)

🏢 Summary: The role focuses on integrating React Native solutions into an existing native iOS/Android mobile platform, designing architecture and implementing hybrid modules within a mature codebase. The position involves bridging React Native and native layers, optimizing performance, and contributing to scalable, maintainable mobile architecture. 🗂️ Requirements: Strong commercial experience with React Native, Experience in native mobile development (iOS and/or Android), Understanding of mobile application architecture, Experience integrating React Native with native applications, Ability to implement cross-layer communication and bridging, Experience with navigation and state management, Familiarity with CI/CD processes and build tools, Focus on code quality and performance optimization 📃 Skills: React, ReactNative, JavaScript, TypeScript, iOS, Android, Swift, Kotlin, Objective-C, Java, CI/CD, Git, Xcode, Gradle 🏢 Description: We are looking for an experienced React Native Developer to support the integration of React Native solutions into an existing native mobile platform (iOS/Android). Responsibilities: Designing and implementing an architectural approach to combine React Native components with the native application Analyzing the current mobile architecture and identifying optimal integration points Implementing and developing React Native modules within the existing native codebase Ensuring scalability, performance, and maintainability of the solution Handling communication between native and React Native layers (data flow, bridging) Contributing to and optimizing build/deployment processes Maintaining high code quality and alignment with platform standards Close collaboration with iOS and Android teams to ensure smooth integration of new features Requirements: Strong knowledge of React Native with proven commercial experience Experience in native mobile development (iOS and/or Android) Solid understanding of mobile application architecture Experience integrating hybrid solutions with native applications Ability to work with navigation, state management, and cross-layer communication Familiarity with CI/CD processes and build tools Strong focus on code quality, performance, and readability Good teamwork and communication skills Nice to have: Experience working with large, existing mobile systems Knowledge of mobile performance optimization best practices Experience working in Agile environments We offer: Opportunity to work on a modern mobile platform Collaboration with an experienced development team Real impact on architecture and product direction Flexible working conditions

🏢 Summary: Mid+/Senior Mobile Developer role focused on building and maintaining a complex React Native application for Android and iOS. The position involves delivering high-performance, user-centric mobile solutions with features like geolocation, EV charging integration, and CarPlay support. You will collaborate cross-functionally to ensure code quality, stability, and scalable mobile architecture. 🗂️ Requirements: 4+ years commercial mobile development experience, Expert knowledge of React Native, Strong JavaScript proficiency, Strong TypeScript proficiency, Experience with REST or GraphQL APIs, Deep understanding of mobile build and release processes, Experience publishing to App Store or Google Play, Knowledge of mobile testing practices, Ability to design mobile application architecture 📃 Skills: ReactNative, JavaScript, TypeScript, REST, GraphQL, Android, iOS, Kotlin, Java, Swift, CICD, CarPlay, Geolocation, AppStore, GooglePlay 🏢 Description: Tech stack: React Native mobile ecosystem JavaScript TypeScript REST/GraphQL Requirements: 4+ years of commercial experience in mobile development (Android and/or iOS). Expert-level knowledge of React Native . A "mobile-first" mindset with experience in building complex mobile applications. Deep understanding of the mobile ecosystem (build processes, testing, and store publication). Strong proficiency in JavaScript and TypeScript . Experience integrating with APIs ( REST / GraphQL ). Strong problem-solving skills and the ability to work effectively both independently and in a team. About the Role: We are looking for an experienced Mobile Developer (Mid+ or Senior level) with at least 4 years of commercial experience in building mobile applications for Android and/or iOS. The ideal candidate is a mobile-first specialist—we are looking for someone whose expertise is rooted deeply in the mobile ecosystem rather than web development. You should have a strong command of React Native and a passion for creating high-performance, user-centric mobile experiences. The Project: You will join a project for a major international corporation in the energy and chemical sector . We are developing a modern mobile application for B2B and B2C users that manages fuel cards, loyalty programs, and exclusive discounts. The app has a real-world impact on the daily lives of drivers, supporting them on the road and through charging infrastructure. Key features include: User Management: Smooth B2B and B2C registration and login. Benefits: Fuel card management, loyalty rewards, and discount tracking. Maps & Geolocation: Searching for stations and points of interest. E-Mobility: Starting/stopping EV charging sessions directly from the app with real-time (live) status tracking. Advanced Features: CarPlay integration (MVP) and dynamic widgets for quick access to key information. Main responsibilities: Developing and maintaining mobile applications using React Native . Collaborating closely with the Product Team, Backend Developers, and UX/UI Designers. Ensuring high code quality, application performance, and stability. Actively participating in product roadmapping and technical decision-making. Conducting code reviews and sharing knowledge with the team Nice to Have Experience with native development : Kotlin/Java (Android) or Swift (iOS). Hands-on experience with native deployment (Google Play Store / App Store, certificates, provisioning, signing). Knowledge of CI/CD pipelines tailored for mobile apps. Experience in mobile performance optimization. Background in designing mobile application architecture.

🏢 Summary: 4-month freelance contract for a Senior React Native Developer to build and maintain a cross-platform mobile application for iOS and Android based on an existing web platform. The role focuses on implementing new features, integrating APIs, optimizing performance, and contributing to architecture and code quality. The application supports monitoring and operational control of autonomous cleaning robots in large commercial facilities. 🗂️ Requirements: Availability from July 1st, 4+ years of commercial software development experience, Strong knowledge of React Native, Strong knowledge of TypeScript, Experience with REST API integrations, Understanding of App Store release processes, Understanding of Google Play release processes, Experience working in Agile teams, Proficiency with Git 📃 Skills: React, ReactNative, TypeScript, REST, Git, iOS, Android, Swift, Kotlin, CI/CD, Agile 🏢 Description: We are looking for an experienced Senior React Native Developer responsible for building and maintaining modern mobile applications for both iOS and Android platforms. The person in this role will collaborate closely with the project team on application architecture, implementation of new features, and performance optimization. This is a 6-month freelance contract (with a possibility of extension, though not guaranteed). Requirements: Availability starting July 1st 4+ years of commercial software development experience strong knowledge of React Native and TypeScript experience with REST API integrations understanding of App Store and Google Play release processes experience working in Agile teams good knowledge of Git Nice to have: experience with native iOS (Swift) or Android (Kotlin) development familiarity with CI/CD pipelines for mobile applications experienced in using AI tools in day-to-day workflow Responsibilities: Develop and maintain a cross-platform mobile application using React Native for iOS and Android. Implement new features based on the existing web application and business requirements. Collaborate with backend, web, QA, and product teams to ensure seamless integration and consistent user experience. Integrate REST APIs and real-time communication mechanisms. Optimize application performance, stability, and scalability. Participate in architecture discussions, code reviews, and technical decision-making. Troubleshoot, debug, and resolve application issues. Contribute to improving development standards, CI/CD processes, and overall code quality Project description: Development of a mobile application based on an existing web platform used for managing autonomous cleaning robots operating in shopping malls, airports, and other large commercial facilities. The application will support robot monitoring, task management, real-time status tracking, and operational control for end users.

🏢 Summary: The offer is for an experienced Mobile Engineer to develop and iterate on a React Native mobile application in close collaboration with product teams, contributing to impactful solutions in the legal services domain. The role involves building and maintaining production-ready mobile apps with a strong focus on code quality and technical design. It is a fully remote B2B opportunity with mentorship support. 🗂️ Requirements: BSc in Computer Science, Software Engineering or related field, Minimum 5 years of experience in JavaScript, Minimum 5 years of experience in React Native, Experience with GraphQL, Experience with automatic testing frameworks, Published mobile applications in App Store or Google Play 📃 Skills: JavaScript, React, ReactNative, GraphQL, Node, Testing, iOS, Android 🏢 Description: We are looking for an experienced Mobile Engineer who is passionate about technology, is capable of breaking down complex problems, and has a strong will to get things done. You will be part of the team working closely with product and various functions in the company to rapidly iterate on our product and find the best solutions. Join us as we disrupt the legal services industry, if you want to apply your coding and tech design skills to make a significant positive impact on people during their key life events. Requirements: BSc in Computer Science, Software Engineering or related field At least 5 years of experience in JavaScript, React Native – a must Experience with GraphQL Experience with Node- nice to have Experienced with automatic testing frameworks Developing apps that are currently in the App Store or Google Play Offer: Cooperation based on a B2B contract. 100% remote work. The support of a dedicated mentor. In the relationship, we focus on direct communication. When you join speedapp, you will be put in touch with a dedicated mentor who will make sure that you enjoy working with us and with the client. Events and integration meetings, as well as participation in various initiatives, e.g., sports. Access to the benefits offering (medical care, life insurance, Multisport card).