App Developer

October 13, 2026

Hybrid

Senior

Copenhagen, Denmark

Worth knowing

English is required

Description

The company is hiring an app developer to own the technical development of two customer-facing mobile apps. You will build features, fix bugs and evolve the Flutter codebase and architecture for iOS and Android, following solutions from clarification and development through testing, release and continuous improvement. The work covers Firebase services, payment integrations and connections to company APIs and business systems.

Responsibilities

Build new features and further develop both apps in Flutter for iOS and Android
Integrate Apple Pay, Google Pay and MobilePay with clear handling of payment status and errors
Use Firebase for app services, push notifications and monitoring of crashes and performance
Connect the apps to company APIs and business systems together with the integration team
Drive testing, beta releases, review and release in App Store and Google Play
Improve stability, speed, usability and maintenance based on production data and feedback
Deliver agreed features and bug fixes with clear acceptance criteria and keep the team informed of progress and risks

Requirements

Solid practical experience with Flutter and Dart, with apps running in production on iOS and Android
Personally published and updated apps through App Store Connect and Google Play Console, including signing, beta releases, review and release
Hands-on experience with Google Firebase, able to configure and integrate relevant services in a mobile app
Able to implement Apple Pay, Google Pay and MobilePay through payment provider integrations
Experience with API integrations, logins, tokens and secure local storage, handling unstable connections and errors
Works with Git, code reviews, automated tests and CI/CD and takes responsibility for release quality
Able to investigate crashes, performance issues and bugs on both iOS and Android and follow fixes to production
Understands security and handling of customer data in apps, collaborating with specialists on requirements and controls
Works independently, explains technical choices clearly and flags dependencies and blockers early
Thrives in an agile team and turns business needs into concrete tasks, estimates and solutions
Communicates clearly in Danish and English with technical colleagues and the business

Conditions

Part of a 30-person Technology department, reporting to the Head of Data, AI & Engineering
Broad system landscape with CRM, ERP, data platform, integrations and digital customer experiences
Opportunity to work hands-on with Flutter, Firebase and mobile payments from idea to release
Flexibility and work from home, salary package with pension and bonus, free phone and internet, health and group life insurance
Published apps and practical results are valued over a specific degree or certification

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