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.
Requirements
- 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.
Benefits
- 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.
Skills Required
- 5+ years of software engineering experience
- At least 3 years of Flutter experience
- Experience developing and maintaining mobile applications published on the App Store and Google Play
- Strong knowledge of Flutter and Dart
- Experience with mobile application state management
- Experience using AI coding tools such as GitHub Copilot, Cursor, Claude Code, or similar
- Familiarity with Spec-Driven Development and tools such as OpenSpec or GitHub Spec Kit
- Experience with unit, widget, and integration testing
- Understanding of object-oriented programming, SOLID principles, and design patterns
- Experience working with REST APIs
- Experience with CI/CD pipelines for mobile applications
- Fluent written and spoken English
- Riverpod experience
- BLoC or Provider experience
What We Do
Alongside | Build Great Products with Great Teams Alongside helps VC-backed start-ups, scale-ups and digital-first enterprises accelerate their roadmaps by assembling elite, time-zone-aligned teams of software engineers, product managers and UX/UI designers, often in under 14 days. Our Porto HQ sits in Europe’s fastest-growing tech hub and taps a vetted global talent pool that lets you ship faster, reduce burn and stay laser-focused on product-market fit. Why high-growth companies choose Alongside • Top 1 % practitioners: rigorously screened full-stack, mobile, blockchain & AI/ML engineers, plus senior designers and product leaders.  • Flexible engagement models: scale a single specialist, an entire squad, or an autonomous build-and-ship pod. • End-to-end ownership: discovery → design → development → launch, with weekly velocity reports and transparent KPIs. • Cost-efficient remote talent: New York, Porto, Pune & Hanoi offices give you round-the-clock progress without Silicon-Valley price tags.  • Proven track record: core Alongside team took Arkive, the world’s first decentralised museum, from idea to funded product. We helped Circuit Security to secure 4.5M in funding and many other startups.
