Flutter developer in trading

On The Spot Development; Warszawa; On-site; PLN 180,000 - 280,000; Full time

Job summary

On The Spot Development ищет опытного Senior Flutter разработчика для мобильных приложений в области торговли и финансов. Ваша задача — разрабатывать новые функции, поддерживать качество кода и сотрудничать с командой из разных стран.

Требуется 5+ лет разработки ПО, 4+ года Flutter на продакшн-приложениях, владение Dart и современными state-management технологиями. Работа в команде, онлайн-коллы и участие в релизах с мультибрендовой сборкой.

Qualifications

• Опыт разработки программного обеспечения 5+ лет.
• 4+ года Flutter на продакшн-приложениях.
• Знание Dart и современных state-management (BLoC, Riverpod, Provider).

Responsibilities

• Разработка, тестирование и поддержка функций для Android и iOS на Flutter.
• Писать чистый, структурированный код в соответствии с архитектурой команды.
• Интеграция с рыночными данными, графиками, аналитикой и SDK финтех.
• Работа в рамках многоцветной/многобрендовой сборки и релиз-процессов.
• Устранение production-issues и поддержка производительности приложений.
• Участие в code reviews и качественном тестировании (юнит/виджеты/интеграционные тесты).
• Сотрудничество с Product, Design, Backend, QA.
• Достоверная оценка задач и коммуникация рисков в спринтах.
• Английский для коммуникации в распределенной команде.

Skills

Flutter

Dart

BLoC

Riverpod

Provider

Android/iOS native

REST/ WebSocket

English

Tools

Firebase

GitLab CI

ChartIQ

Mixpanel

AppsFlyer

Job description

Описание: Finonex is a company building modern mobile trading and financial applications across multiple brands from a shared Flutter codebase. The team focuses on creating accessible, secure, and user-friendly trading experiences powered by cutting-edge technology, supported by 24/7 service. We are looking for a strong, hands-on Senior Flutter Developer to join our Mobile R&D team and help build our mobile trading applications.

Задачи

• Design, develop, test, and maintain high-quality features for Android and iOS in Flutter.
• Write clean, well-structured, testable code that follows the team's architecture, patterns, and coding standards.
• Contribute to integrations such as real-time market data, charting, analytics, and third-party financial SDKs.
• Work within the existing multi-flavor / multi-brand build and release process.
• Troubleshoot and fix production issues, and help keep the apps performant and stable.
• Participate actively in code reviews - both giving and receiving constructive feedback.
• Write unit, widget, and integration tests to keep quality high.
• Contribute to app reliability and observability (crash-free rates, performance).
• Collaborate closely with Product, Design, Backend, and QA to deliver business objectives.
• Deliver predictably within sprints, with honest estimation and clear communication of progress and risks.
• Communicate proactively and clearly in English with a distributed, cross-country team.

Требования

• 5+ years of professional software development experience.
• 4+ years of hands-on Flutter development on production applications (Flutter as a primary, day-to-day skill - not occasional or secondary).
• Strong command of Dart and modern state management (BLoC, Riverpod, and Provider).
• Solid working experience within multi-flavor / multi-environment Flutter apps.
• Working knowledge of native Android and iOS - build configuration and platform-channel / SDK integration.
• Experience with REST APIs and real-time communication (WebSocket or similar).
• Strong ownership, autonomy, and problem-solving skills.
• Excellent written and verbal English — a must (daily communication with the Israel-based team).
• Availability to work Sunday-Thursday, aligned with the Israeli team — a must.
• Будет плюсом: Experience in fintech, trading, forex/CFD, financial services, or another regulated industry; Experience with the Firebase suite (Crashlytics, Remote Config, Performance, Analytics); Experience with product analytics / attribution (e.g. Mixpanel, AppsFlyer); Experience with charting libraries (e.g. ChartIQ) and engagement SDKs (e.g. Braze); Familiarity with FVM, monorepo workflows, and GitLab CI; Experience with automated / integration testing and AI-assisted development tools; Experience working in distributed / international teams

Условия

At On The Spot, we’re creating a workplace people would want to stay in: supportive, well-organized, and fair in terms of conditions and benefits. We’ll share more about our benefit package during the interviews.