Senior Flutter Engineer

Why Valtech? We’re the experience innovation company - a trusted partner to the world’s most recognized brands. To our people we offer growth opportunities, a values-driven culture, international careers and the chance to shape the future of experience. 

The opportunity

At Valtech, you’ll find an environment designed for continuous learning, meaningful impact, and professional growth. Whether you're pioneering new digital solutions, challenging conventional thinking or building the next generation of customer experiences, your work will help transform industries. 

We are proud of: 

• The work we do and the innovation we drive 
• Our values of share, care and dare 
• A workplace culture that fosters creativity, diversity and autonomy 
• Our borderless, global framework, which enables seamless collaboration 

The role  

Valtech is looking for a Senior Flutter Engineer to help design and build high-quality, scalable native mobile and web applications using Flutter. You will work closely with product managers, designers, and fellow engineers to bring modern, responsive digital experiences to life. As a senior engineer, you’ll be expected to take ownership of features from concept to store release, contribute to architectural decisions, ensure code quality, and mentor junior team members. You will also use AI coding agents as a core part of your daily work and help define how our mobile teams use them in client projects. Your expertise will help elevate engineering practices and strengthen Flutter adoption across projects.

You will thrive in this role if you are: 

• A senior engineer who owns outcomes, makes pragmatic tradeoffs and can defend them to peers and clients
• A collaborator who values teamwork and knowledge-sharing 
• Excited by the intersection of technology, creativity and data 
• Experienced in Agile methodologies and consulting (a plus) 

Role responsibilities

• Develop cross-platform applications using Flutter for Android/iOS
• Translate product requirements and UI designs into fully functional features
• Write clean, testable, and maintainable code following best practices
• Participate in code reviews, offer constructive feedback, and support team learning
• Collaborate with UI/UX designers to create seamless user experiences
• Integrate apps with backend APIs and services
• Monitor application performance and diagnose root causes in production
• Go below the Flutter layer when needed: platform channels, FFI, native SDK integration
• Work with AI coding agents daily and define team practices for them

Must have qualifications

To be considered for this role, you must meet the following essential qualifications: 

• 8+ years of total software development experience
• Minimum 4+ years of hands-on experience with Flutter and Dart in production, including apps with real users at scale
• Strong understanding of object-oriented programming and modern development practices
• Experience writing unit widget and integration tests (experience with golden tests and Widgetbook is a plus)
• Hands-on experience choosing and owning state management solutions (e.g., Riverpod, BLoC, Provider) and ability to justify the choice
• Experience integrating RESTful APIs and handling asynchronous data flows
• Understanding of responsive UI principles and mobile design guidelines
• Solid knowledge of Git and CI/CD workflows, including code signing and app store release
• Experience with local storage (e.g., Hive, SQLite) and performance optimization
• Has owned the architecture of at least one non-trivial app using architectural patterns (MVVM, Clean Architecture, etc.) and can explain what they would do differently
• Experience collaborating with non-engineers (designers, product, clients)
• Deep knowledge of Flutter internals (rendering pipeline, rebuild behavior, isolates, memory management)
• Hands-on native mobile experience (Swift/Kotlin), including platform-specific behavior, permissions and store requirements
• Advanced, daily use of AI coding agents: you choose models and harnesses deliberately for different tasks (e.g., planning vs. implementation vs. review), manage context effectively, and can explain where agents fail and how you catch it

If you do not meet all the listed qualifications or have gaps in your experience, we still encourage you to apply. At Valtech, we recognize that talent comes in many forms, and we value diverse perspectives and a willingness to learn. 

Commitment to reaching all kinds of people 

We design experiences that work for all kinds of people - and that starts with our own teams. At Valtech, we’re intentional about building an inclusive culture where everyone feels supported to grow, thrive and achieve their goals. No matter your background, you belong here. Explore our Diversity & Inclusion site to see how we’re creating a more equitable Valtech for all. 

The benefits  

This is a Permanent position based in Portugal. 

Beyond a competitive compensation package, we offer: 

• Flexibility, with remote and hybrid work options (country-dependent) 
• Career advancement, with international mobility and professional development programs 
• Learning and development, with access to cutting-edge tools, training, and industry experts 

Our benefits are tailored to each location. Your Talent Partner will provide full details during the hiring process. 

Your application process

Once you apply, our Talent Acquisition team will review your application. Your CV should cover key information on relevant experiences and expertise. We do not require information such as age, gender, marital status, or a headshot in your application. We review all candidates based on skills, experience, and potential.

⚠️ Beware of recruitment fraud!

We are committed to inclusion and accessibility. If you need reasonable accommodations during the interview process, please either indicate it in your application or let your Talent Partner know. 

About Valtech

Valtech is the experience innovation company that exists to unlock a better way to experience the world. By blending crafts, categories, and cultures, we help brands unlock new value in an increasingly digital world. 

At the intersection of data, AI, creativity, and technology, we drive transformation for leading organizations, including L’Oréal, Mars, Audi, P&G, Volkswagen Dolby, and more. 

At Valtech, we don’t just talk about transformation. We make it happen. Our people are the heart of our success, and we foster a workplace where everyone has the support to thrive, grow and innovate. 

Are you ready to create what’s next? Join us.