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Alongside

Senior Flutter Engineer

Alongside Porto, Portugal

Software Development · 11-50 employees

2 d ago
Remote flutter Senior (5-10 yrs) Full-time Portugal
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About the role

Design, develop, test, and deliver Flutter features for iOS and Android, taking ownership from specification through production while contributing to architecture, state management, CI/CD, and release processes. Troubleshoot and improve application performance, collaborate with international product, design, and backend teams, and support other engineers through mentoring and code reviews.

What they look for

Flutter Dart Mobile Application Development Riverpod AI-Assisted Coding Spec-Driven Development Automated Testing CI/CD Software Architecture State Management Object-Oriented Programming SOLID Principles Design Patterns REST APIs Performance Optimization Mentoring

Requirements

Requires at least five years of software engineering experience, including three or more years with Flutter, and experience maintaining published mobile applications. Candidates should have strong Flutter and Dart skills, familiarity with state management, AI coding tools, spec-driven development, automated testing, CI/CD, software design principles, and REST APIs, as well as fluent written and spoken English.

Full description

Alongside is a Portuguese company that partners with international organizations to build and scale exceptional tech teams.

We’re looking for a Senior Flutter Engineer to join an exciting international project within a global technology company. You’ll contribute to the development and evolution of a mobile application used by accounting professionals across Europe, working alongside international teams based in Portugal, the Netherlands, and India.

This is a hands-on engineering role where Flutter development, software architecture, and AI-assisted coding come together to build scalable, high-quality mobile solutions.

Responsabilities:

  • Design, develop, and deliver new features for mobile applications using Flutter (iOS and Android).
  • Take ownership of features throughout the development lifecycle, from specification to production.
  • Work with AI-assisted development tools, such as GitHub Copilot, to accelerate development while ensuring code quality.
  • Apply Spec-Driven Development practices using tools such as OpenSpec or similar.
  • Contribute to application architecture and state management using Riverpod.
  • Develop and maintain automated tests, including unit, widget, and integration tests.
  • Improve CI/CD pipelines and mobile application release processes.
  • Troubleshoot production issues and continuously improve application performance.
  • Collaborate with Product, Design, and Backend teams in an international environment.
  • Share technical knowledge and support other engineers through mentoring and code reviews.
  • 5+ years of experience in software engineering, including at least 3 years working with Flutter.
  • Strong experience developing and maintaining mobile applications published on the App Store and Google Play.
  • Solid knowledge of Flutter, Dart, and state management, preferably Riverpod (BLoC or Provider experience is also valued).
  • Hands-on experience using AI coding tools such as GitHub Copilot, Cursor, Claude Code, or similar.
  • Familiarity with Spec-Driven Development approaches and tools such as OpenSpec or GitHub Spec Kit.
  • Experience with automated testing (unit, widget, and integration tests).
  • Good understanding of OOP, SOLID principles, design patterns, and REST APIs.
  • Experience with CI/CD pipelines for mobile applications.
  • Fluent English, both written and spoken.
  • 6-month contract, with the possibility of extension depending on project needs (not guaranteed).
  • Hybrid working model, with 2 mandatory office days per week in Boavista, Porto.
  • Opportunity to work on an international project with experienced engineering teams.
  • Exposure to modern AI-first software development practices.
  • A collaborative environment where you can contribute to technical decisions and product development.

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