April 8, 2026

Senior Flutter Developer

Senior • Remote

110 - 150 PLN

Warsaw, Poland

Project description:

We are looking for a top-tier Mobile Applications Developer to join our team and help us build cutting-edge software solutions for the Solar Industry. Our platform focuses on designing and monitoring solar fields, processing large-scale data in a SaaS environment, ensuring fast response times, and delivering an outstanding user experience.

If you are a passionate Flutter developer who cares deeply about user experience, intuitive interactions, and modern app design, and you are ready to take on the challenge of building high-quality, mission-critical mobile applications, this role is for you.

Requirements:

  • Extensive experience in mobile application development

  • Experience in developing mobile applications using Flutter

  • 5+ years of experience in Native Android development (Java / Kotlin)

  • Strong understanding of object-oriented design principles and concepts

  • Experience working with AI-based development tools

  • Proven ability to build adaptive, user-friendly, and flexible mobile UIs

  • Team player with excellent communication skills

  • Passion for high-quality code, performance optimization, and intuitive user experiences

Main responsibilities:

  • Design and develop high-volume, low-latency mobile applications for mission-critical systems, ensuring high availability and top performance

  • Contribute to all phases of the software development lifecycle

  • Write clean, well-designed, testable, and efficient code

  • Prepare and deliver software component releases

  • Collaborate closely with cross-functional teams to ensure seamless integration and optimal user experience

  • Continuously improve application performance, usability, and scalability

This is a freelance, project-based engagement with no additional benefits, offering the opportunity to work on a clearly defined initiative scheduled to run until the end of 2026, with a possibility of extension depending on project needs and performance.

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Warsaw, Poland

12,000 - 18,000 PLN

🏢 Summary: Oferta dotyczy rozwoju nowoczesnej platformy IoT dla branży OZE, obejmującej aplikację webową w Angularze oraz aplikację mobilną w Flutterze. Rola koncentruje się na tworzeniu dashboardów, integracji z REST API i WebSocket oraz prezentacji danych telemetrycznych w czasie rzeczywistym. Kandydat będzie współpracować z zespołami Backend i Embedded przy innowacyjnym projekcie badawczo-rozwojowym. 🗂️ Requirements: 2–3 lata doświadczenia jako Front-end Developer lub Mobile Developer, Bardzo dobra znajomość Angular, Bardzo dobra znajomość TypeScript, Znajomość RxJS, Doświadczenie z komponentami, formularzami i dyrektywami Angular, Doświadczenie w integracji z REST API, Znajomość WebSocket i danych czasu rzeczywistego, Doświadczenie z Angular Material, Umiejętność tworzenia responsywnych interfejsów, Znajomość CSS, Znajomość TailwindCSS, Doświadczenie z Git, Doświadczenie z GitLab, Język angielski na poziomie B2 📃 Skills: Angular, TypeScript, RxJS, Flutter, Dart, REST, WebSocket, Git, GitLab, TailwindCSS, CSS, AngularMaterial, OAuth2, CI/CD 🏢 Description: Dla naszego Klienta, firmy działającej w branży odnawialnych źródeł energii, poszukujemy Front-end Developera / Mobile Developera, który/a dołączy do zespołu realizującego projekt badawczo-rozwojowy współfinansowany przez NCBR. Będziesz rozwijać nowoczesną platformę IoT do monitorowania danych z falowników fotowoltaicznych oraz zarządzania urządzeniami IoT. Twoim głównym zadaniem będzie rozwój aplikacji webowej w Angularze oraz współtworzenie aplikacji mobilnej w Flutterze. Aplikacja mobilna powstaje od podstaw, dlatego będziesz mieć realny wpływ na jej rozwój i funkcjonalności. Warszawa | Praca stacjonarna | Umowa o pracę Twój zakres obowiązków: • rozwój aplikacji webowej w Angularze, • tworzenie dashboardów oraz widgetów prezentujących dane z falowników fotowoltaicznych i urządzeń IoT, • implementacja niestandardowych komponentów, formularzy oraz paneli administracyjnych, • rozwój i utrzymanie aplikacji mobilnej w Flutterze, • integracja interfejsu z REST API oraz komunikacją WebSocket, • prezentacja danych telemetrycznych w czasie rzeczywistym, • konfiguracja powiadomień push i mechanizmów alarmowych w aplikacji mobilnej, • personalizacja interfejsu (white-labeling), • współpraca z zespołami Backend i Embedded przy projektowaniu modelu danych oraz funkcjonalności, • testowanie, optymalizacja i dbanie o wydajność aplikacji, • udział w code review oraz rozwijaniu dobrych praktyk frontendowych, • w późniejszym etapie publikacja i rozwój aplikacji w Google Play oraz App Store. Wymagania: Must have: • minimum 2–3 lata doświadczenia jako Front-end Developer (Angular) i/lub Mobile Developer, • bardzo dobra znajomość Angular oraz TypeScript, • praktyczna znajomość RxJS, komponentów, formularzy i dyrektyw Angular, • doświadczenie w integracji z REST API, • znajomość pracy z danymi w czasie rzeczywistym (WebSocket, subskrypcje), • doświadczenie z Angular Material, • umiejętność tworzenia responsywnych interfejsów użytkownika, • znajomość CSS oraz Tailwind CSS, • doświadczenie w pracy z Git oraz GitLab, • język angielski na poziomie minimum B2. Mile widziane: • znajomość Flutter oraz Dart, • doświadczenie w tworzeniu aplikacji mobilnych, • doświadczenie z platformami IoT, • znajomość OAuth 2.0, • doświadczenie z CI/CD, • publikacja aplikacji w Google Play oraz App Store, • doświadczenie z wizualizacją danych (wykresy, mapy, dashboardy, wskaźniki). Technologie: Angular • TypeScript • RxJS • Angular Material • Flutter • Dart • REST API • WebSocket • Git • GitLab • Tailwind CSS Co oferujemy: • udział w budowie nowoczesnej platformy IoT od podstaw, • realny wpływ na architekturę aplikacji oraz decyzje technologiczne, • możliwość tworzenia zarówno aplikacji webowej, jak i mobilnej, • współpracę z doświadczonymi zespołami Backend, Embedded, Cloud oraz AI, • możliwość rozwoju kompetencji w obszarze Flutter i Internetu Rzeczy (IoT), • pracę przy innowacyjnym projekcie badawczo-rozwojowym dla branży odnawialnych źródeł energii, • stabilne zatrudnienie w oparciu o umowę o pracę, • prywatną opiekę medyczną, • dofinansowanie do zajęć sportowych, • spotkania integracyjne.