Senior Flutter Developer

At HubX we build mobile apps, used and loved by millions all around the world. We have a track record of building and growing mobile apps on various verticals that have reached over 600 million users across 6 continents and 190+ countries. We are looking for a talented Senior Flutter Developer for the Supernova to join our team. Supernova is an AI-native product studio built around conversational, multimodal intelligence.

Responsibilities

Build and maintain high-performance mobile applications using Flutter and Dart; Design responsive and adaptive UIs with Material and Cupertino widgets; Implement and manage state using Bloc, Provider, or Riverpod; Integrate RESTful APIs and WebSocket connections; Apply clean code principles and follow SOLID practices; Optimize app performance and debug issues using Flutter DevTools; Participate in CI/CD pipelines and version control processes; Work on rapid prototyping and MVP development cycles

Requirements

5+ years of hands-on experience in mobile application development, with strong Flutter and Dart expertise; Experience building and shipping production-grade mobile applications in fast-paced environments; Proficiency in state management solutions (especially Bloc); Experience with RESTful API and WebSocket integrations; Firebase experience (Auth, Firestore, Functions, Remote Config, etc.); In-depth knowledge of Flutter's widget architecture and performance optimization; Solid understanding of clean code principles and SOLID; Familiarity with Git and CI/CD workflows; Familiarity with Flutter DevTools for performance analysis; Team player with a fast-learning, problem-solving, and collaborative mindset

Nice to have

Experience writing unit, widget, and integration tests; Basic Kotlin or Swift knowledge; Experience integrating AI-powered features using LLMs or AI SDKs (e.g. OpenAI, Gemini, Claude); Familiarity with AI-assisted development tools such as Codex, Claude or Cursor; Contributions to open-source or personal Flutter packages; UI/UX knowledge and working experience with Figma or design systems

Benefits

Commuting and meal support; A brand new MacBook and a designed welcome kit; Private medical insurance (TSS); HPV vaccination; Heltia membership; Critical women's health coverage; Annual Beije membership; Annual gym reimbursement; Unique office in Istanbul or Izmir; Pet-friendly office; Unlimited coffee and fully stocked kitchen; HubX Breakfast Club; Education budget and weekly Cambly speaking sessions; Team events and All Hands gatherings; Strong company culture; X Community discounts; Complimentary premium access to HubX apps; Birthday leave and gift voucher