Senior Flutter Developer - Supernova

HubX; Fatih; On-site; TRY 700,000 - 1,000,000; Full time

Benefits offered by this job

MacBook Pro

Medical Insurance

Gym membership

Meditopia access

Cambly sessions

All Hands events

Office in Istanbul

Job summary

HubX is seeking a Senior Flutter Developer to join our Istanbul team. You will build and maintain mobile apps using Flutter, design adaptive UIs, and implement robust state management while integrating RESTful APIs and WebSocket connections.

You’ll contribute to clean code, performance tuning, and CI/CD workflows in a fast‑paced environment. The role emphasizes rapid prototyping, MVP development, and collaboration within a highly motivated team, with a strong focus on delivering production‑grade

Qualifications

• 5+ years of hands‑on experience in mobile app development with Flutter and Dart.
• Production‑grade mobile apps experience in fast‑paced environments.
• Proficiency in state management solutions (Bloc).
• RESTful API and WebSocket integrations experience.
• In‑depth knowledge of Flutter widget architecture and performance optimization.
• Strong understanding of SOLID and clean code principles.
• Familiarity with Git and CI/CD workflows.
• Experience with Flutter DevTools for performance analysis.
• Team player with fast learning and collaborative mindset.

Responsibilities

• Build and maintain high-performance mobile applications with Flutter and Dart.
• Design responsive UIs with Material and Cupertino widgets.
• Manage state using Bloc, Provider, or Riverpod.
• Integrate RESTful APIs and WebSocket connections.
• Apply clean code principles and SOLID practices.
• Optimize app performance and debug with Flutter DevTools.
• Contribute to CI/CD pipelines and version control workflows.
• Support rapid prototyping and MVP development cycles.

Skills

Flutter

Dart

State management (Bloc)

RESTful APIs

WebSocket

SOLID principles

Git

CI/CD

Flutter DevTools

Tools

Git

CI/CD pipelines

Flutter DevTools

Job description

We are looking for a talented Senior Flutter Developer to join our energetic and highly motivated team.

Some of your 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

What we look for

• 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
• 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

The benefits of working with us

• Huge impact: Your work can significantly impact our millions of users, and even the mobile app industry at large in the next years to come.
• Ownership, opportunity to take responsibility from day one: No one will micromanage you. Together with your team, you’ll be free to choose a direction, test, fail, and test the next idea.
• A competitive compensation package: Our total compensation package is very comprehensive; covering your cost of commuting for our headquarters as well as providing you with a meal card.
• A brand new Macbook and welcome kit
• Private Medical Insurance & HPV Vaccine & Critical Women’s Health Coverage: We go above and beyond for your health.
• Gym Reimbursement: We support annual gym membership because we want you to be in tip‑top shape psychically and mentally.
• A unique and top‑notch office: Our Istanbul office is located at Maslak, right in the heart of the city. Surrounded by the energy of Istanbul’s bustling core, it’s a space designed for creativity and collaboration.
• Unlimited coffee from XPresso: You can grab a cup of coffee whenever you need, whether it’s to kickstart your morning or power through the day.
• Limitless Snacks & breakfast: Fuel your day with our fully stocked kitchen! From a hearty breakfast to a variety of snacks available anytime, we’ve got everything you need to stay energized and focused.
• Continuous education: The more you want to improve your knowledge, the more we support you!
• Meditopia membership: Enjoy full access to Meditopia for mental wellbeing, yoga, and therapy.
• Cambly access: Break language barriers with weekly Cambly speaking sessions.
• Team events that create lasting memories, including our traditional All Hands gatherings where the whole company comes together, as well as more humble celebrations and happy hours. Curious about our vibe? Take a look at our Instagram!
• Strong company culture: Our approach is always open communication & teamwork. #XCulture
• X Community discounts: Being part of HubX comes with perks, enjoy exclusive discounts and more as a valued member of our community.