Flutter Developer (Web) - Hybrid Porto

HumanIT; Porto; Hybrid; EUR 40,000 - 56,000; Full time

Job summary

HumanIT is seeking a Flutter Developer (Web) to join a fast-growing tech team in Porto. You will design and build scalable Flutter web applications and mobile experiences used across Europe, collaborating closely with product managers, designers, and backend engineers to deliver high-performance solutions.

You will contribute to the evolution of mobile architecture, write tests, and participate in code reviews to uphold quality.

Qualifications

• Experience building Flutter web apps with Dart.
• Strong understanding of Flutter architecture and state management.
• Experience with real-time data via WebSocket.
• Experience integrating REST APIs into apps.
• Experience writing unit/integration tests for Flutter apps.
• Familiarity with Git workflows and collaborative development.

Responsibilities

• Develop and maintain Flutter web and mobile applications.
• Build reusable UI components and integrate with backend APIs and third-party services.
• Ensure optimal performance and responsiveness across devices.
• Contribute to improving mobile architecture and development processes through code reviews.

Skills

Flutter

Dart

Flutter web

WebSocket

REST APIs

Unit testing

Git

Code reviews

Performance optimization

Cross-functional collaboration

Tools

Firebase

Job description

About the job Flutter Developer (Web) - Hybrid Porto

ABOUT THE OPPORTUNITY

Join a fast-growing technology company building innovative digital products that power the future of electric mobility across Europe. As a Flutter Developer, you'll create high-quality mobile experiences used daily by EV drivers and partners, directly contributing to the transition toward sustainable transportation. A flexible hybrid working model in Porto, and the chance to work on impactful products within a collaborative and rapidly evolving industry. If you're passionate about mobile development and interested in shaping the future of clean energy and mobility, this is an exceptional opportunity.

PROJECT & CONTEXT

You'll design and build scalable mobile applications that serve electric vehicle drivers and partners across Europe, working at the intersection of technology and sustainability. Collaboration is central to your success — you'll partner closely with product managers, designers, and backend engineers to deliver intuitive, high-performance mobile solutions that meet real user needs. Your responsibilities include developing and maintaining Flutter applications, building reusable UI components, integrating with backend APIs and third-party services, and ensuring optimal performance and responsiveness. You'll also contribute to improving mobile architecture, development processes, and team practices through code reviews and active participation in continuous improvement initiatives.

WHAT WE'RE LOOKING FOR (Required)

• Proven experience developing web applications with Flutter and Dart
• Strong understanding of Flutter web architecture and state management patterns
• Hands-on experience with WebSocket protocols for real-time communication
• Experience integrating REST APIs into web applications
• Solid experience writing unit tests and integration tests for Flutter applications
• Familiarity with Git version control and collaborative development workflows
• Experience debugging and optimizing web application performance
• Ability to write clean, testable, and well-documented code
• Strong collaboration skills to work effectively with cross-functional teams
• Participation in code reviews and commitment to code quality
• Available for hybrid work model in Porto

NICE TO HAVE (Preferred)

• Experience with CI/CD pipelines for web application deployment
  
• Experience working with real-time data streams or IoT platforms
  
• Familiarity with Firebase or similar backend-as-a-service platforms
  
• Interest in electric mobility, energy technologies, or sustainability
  
• Experience with automated testing frameworks and test-driven development (TDD)
  
• Knowledge of web accessibility standards (WCAG)
  
• Experience with Progressive Web Apps (PWA)
  
• Familiarity with monitoring and performance optimization tools for web applications