Senior Flutter Developer

On The Spot Development helps startups and disruptive tech companies enter the local market by providing engineers a chance to work on innovative, high-impact products. The company provides employment, HR support, benefits, and a supportive work environment. The team works with Finonex, which builds modern mobile trading and financial applications using a shared Flutter codebase, aiming to deliver accessible, secure, and user-friendly trading experiences with 24/7 service.

• 5+ years of professional software development experience.
• 4+ years of hands-on Flutter development on production applications.
• Strong command of Dart and modern state management libraries (BLoC, Riverpod, Provider).
• Experience with multi-flavor / multi-environment Flutter apps.
• Working knowledge of native Android and iOS, including build configurations and platform-channel / SDK integration.
• Experience with REST APIs and real-time communication like WebSocket.
• Strong ownership, autonomy, and problem-solving skills.
• Excellent written and verbal English communication — daily interaction with the Israel-based team.
• Availability to work Sunday-Thursday, aligned with the Israeli team workdays.

Nice to have:

• Experience in fintech, trading, forex/CFD, financial services, or regulated industries.
• Experience with the Firebase suite (Crashlytics, Remote Config, Performance, Analytics).
• Experience with product analytics/attribution tools (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.

Software Development:

• Design, develop, test, and maintain high-quality features for Android and iOS in Flutter.
• Write clean, well-structured, testable code following team architecture, patterns, and coding standards.
• Contribute to integrations such as real-time market data, charting, analytics, and third-party financial SDKs.
• Work within an existing multi-flavor / multi-brand build and release process.
• Troubleshoot and fix production issues to maintain app performance and stability.

Quality & Testing:

• Participate actively in code reviews, providing and receiving constructive feedback.
• Write unit, widget, and integration tests to maintain high quality.
• Contribute to app reliability and observability regarding crash-free rates and performance.

Collaboration & Delivery:

• Collaborate with Product, Design, Backend, and QA teams to meet business objectives.
• Deliver work predictably within sprints with honest estimation and communication of progress and risks.
• Communicate proactively and clearly in English with a distributed international team.

Candidates are required to work Sunday-Thursday, aligned with the Israeli team's schedule. Only candidates able to comply with this schedule should apply. Data controller is On The Spot Development Limited based in London, with data processing subject to legal rights and regulations. No hiring preference for Ukrainian candidates.