Senior Flutter Developer

We're looking for a senior Flutter developer to join a small, senior engineering team building a production mobile application for an established enterprise client. The app integrates with an AI system through a custom-built backend developed in-house by the same team, so you'll work in close, direct collaboration with the people who own the API. No waiting on a distant third party, no guessing at contracts.

This is a full-time engagement (freelance/contract) running through the end of the year, with rolling renewal likely for the right fit for someone who wants real ownership of the mobile layer and a stable, ongoing relationship rather than a one-off build.

What you'll do

• Own the architecture, development, and maintenance of a cross-platform Flutter application (iOS and Android).
• Integrate tightly with our custom backend, collaborating directly with backend engineers on API design and contracts.
• Build polished, responsive UI that surfaces AI-driven features in a way that feels fast and natural to users.
• Translate product and UX requirements into clean, performant, well-tested Flutter code.
• Establish and uphold engineering standards: state management, testing, CI/CD, and release processes.
• Manage app store builds, releases, and the full deployment pipeline.
• Contribute to technical decisions as a peer in a senior team — code reviews, design discussions, trade-offs.

What we're looking for

• 5+ years of professional mobile development, with 3+ years shipping production Flutter/Dart apps.
• Strong command of a modern state-management approach and the judgement to pick the right one for the job.
• Solid experience integrating Flutter apps with REST and GraphQL APIs, including auth, error handling, and offline/sync considerations.
• Comfort with clean/layered architecture and a pragmatic, testing-first mindset (unit, widget, integration).
• Experience with CI/CD for mobile and end-to-end app store release management.
• Fluent written and spoken English, and the self-direction to thrive in a fully remote, senior team.

Nice to have

• Native platform-channel experience (Swift/Kotlin) for device integrations.
• Experience with enterprise-grade apps: security, offline-first behaviour, larger data sets.

Engagement details

• Type: Freelance / contract, full-time. Initial term through the end of the year, with rolling renewal likely for a good fit.
• Location: Fully remote.
• Timezone: Meaningful daily overlap required with CET (Central European Time) business hours.
• Rate: Based on experience — please include your expected rate in your application.
• Start: Ideally soon, but we'd rather wait for the right person than rush the wrong one.

How to apply

• Send your CV to jobs@zerodue.consulting.

Please include your expected rate and briefly tell us about one production Flutter app you owned end-to-end and a hard technical problem you solved on it. Links to shipped apps, portfolios, or GitHub profiles are welcome.