Senior Flutter Developer - Mobile & Web Ops

Cronysoft is seeking an experienced, high-impact Senior Flutter Developer to join our engineering team at Fortune Tower, Karachi.

In this role, you will take complete end-to-end ownership of complex, cross-platform applications across mobile (iOS, Android) and web surfaces. You will make foundational architectural decisions, build responsive and pixel-perfect UIs, integrate real-time APIs, and lead state management workflows. Operating as a senior technical leader, you will mentor junior developers, conduct code reviews, implement clean architecture, and deploy production-grade enterprise software, SaaS platforms, or POS/ERP solutions.

Key Responsibilities

• Cross-Platform Application Development: Design, build, and maintain high-performance, pixel-perfect Flutter applications across Android, iOS, and Web platforms.
• Architectural Leadership: Establish and maintain scalable, reusable, and testable codebases following Clean Architecture, MVVM, and SOLID design principles.
• State Management & UI/UX: Implement predictable state management patterns using BLoC, Cubit, Riverpod, or Provider while building adaptive, responsive layouts and custom widgets.
• API & Real-Time Data Integration: Integrate RESTful APIs, WebSockets, Firebase services, push notification systems, and third-party event-driven protocols.
• Offline-First & Local Storage: Architect local data persistence and offline synchronization features using SQLite, Hive, Isar, or local database engines.
• Performance Profiling: Optimize memory consumption, app launch speed, transition smoothness, and rendering stability across device screen sizes.
• Release Management & CI/CD: Manage application build pipelines, versioning, automated CI/CD workflows, and app store deployments (Apple App Store, Google Play Store, Web hosting).
• Mentorship & Code Reviews: Conduct thorough code reviews, enforce documentation standards, troubleshoot complex runtime bugs, and mentor junior developers.

Requirements

Flutter & Mobile Software Engineering Depth

• Experience Track: Minimum 5 years of professional software development experience focused on Flutter and Dart.
• Production Track Record: Demonstrated history of architecting and shipping production-level Flutter applications across both mobile and web ecosystems.
• Architecture & Design Patterns: Strong mastery of Clean Architecture, MVVM, SOLID principles, and object-oriented design.
• Advanced State Management: Expert-level knowledge of state management frameworks, specifically BLoC/Cubit or Riverpod.
• Backend Integrations: Deep experience working with RESTful APIs, JSON parsing, asynchronous programming (Futures/Streams), and OAuth authentication flows.
• Firebase & Real-Time Tooling: Hands-on experience with Firebase suite (Firestore, Authentication, Cloud Messaging) and real-time push notification setup.
• Database & Version Control: Proficiency in local databases (SQLite, Hive, Isar) and Git-based collaborative workflows.

Preferred Qualifications

• Experience writing unit tests, widget tests, integration tests, and running performance profiling tools.
• Track record building complex enterprise platforms (ERP systems, POS solutions, SaaS applications).
• Experience implementing offline-first architecture with background sync algorithms.
• Working knowledge of real-time event frameworks (WebSockets, SignalR).
• Practical familiarity with native mobile development (Kotlin for Android or Swift for iOS).
• Exposure to integrating AI APIs, LLM services, or intelligent app features.
• Prior experience acting as a Tech Lead or team mentor.