Senior Flutter Engineer

Castillians

. Design, develop, and maintain mobile applications using Flutter and Dart .

Posted 11/10/2026contractRemote • MaltaSeniorWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates extensive experience in mobile application development with a strong focus on UX/UI design, utilizing Flutter and Dart to create responsive and adaptive applications. Proficient in applying user-centered design principles and ensuring accessibility standards are met across platforms.

Highest-signal resume keywords

Flutter Application DevelopmentDart Programming LanguageMobile Application ArchitectureResponsive And Adaptive DesignUser Experience (UX) Principles

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

Mobile Application DevelopmentUX/UI DesignDesign-To-Code TranslationAccessibility Standards ImplementationClean Separation Of UI, Business Logic, And Data LayersReusable UI Components DevelopmentApplication Usability OptimizationPerformance OptimizationPortfolio DevelopmentTechnical Assessment Completion

Soft Skills

CollaborationCommunicationAttention To Detail

Industry Keywords

User-Centered DesignMobile PlatformsDesign WireframesProfessional Profile SubmissionCET Availability

Tech Stack

Tools & technologies

DartFlutter

About the role

Key responsibilities & impact

Design, develop, and maintain mobile applications using Flutter and Dart
Translate UX/UI designs and wireframes into functional, responsive, and adaptive mobile application interfaces
Implement user-centered design principles to deliver intuitive and accessible user experiences
Apply established mobile application architecture and development best practices
Ensure clean separation of presentation (UI), business logic, and data layers
Develop reusable and maintainable UI components
Optimize application usability, responsiveness, and performance across different devices and screen sizes
Collaborate with designers, developers, and other stakeholders to ensure accurate design implementation
Follow accessibility standards and ensure consistent user experience across mobile platforms
Submit a professional profile/CV
Participate in a 30-minute virtual business alignment call
Complete Castille Vetting if required
Attend a direct client interview and complete a project-specific technical assessment if required

Requirements

What you’ll need

At least 5 years of demonstrable professional experience in mobile application development, specializing in UX/UI
Hands-on experience specifically developing mobile applications using Flutter
Strong technical proficiency in Dart Programming Language
Strong technical proficiency in Flutter Framework
Strong technical proficiency in mobile application architecture and development practices
Practical experience in responsive and adaptive design
Practical experience in design-to-code translation
Practical experience with user experience (UX) principles and practices
Practical experience with accessibility standards and implementation
Practical experience with clean separation of UI, business logic, and data layers
Proven ability to translate design concepts and visual specifications into functional mobile applications
Strong understanding of mobile application development standards and best practices
Detailed portfolio showcasing at least three live or demonstrable mobile applications developed using Flutter
Portfolio must highlight UI/UX implementation capabilities and design skills
Portfolio must include references and accessible links to published applications
Availability to work in CET ±3 hours

Benefits

Comp & perks

Clear scope with no ambiguity over deliverables
Opportunity for repeat engagements based on performance
Access to CX guidance and market insights through our professional network
Potential access to Castille Vetting (background and compliance checks)