Senior Mobile App Engineer

Overview

SKIMS is a solutions-oriented brand creating the next generation of underwear, loungewear, shapewear, and essentials. We deliver technically innovative, comfort-driven products with elevated design for everybody. As we scale globally, our HQ teams shape strategy, build world-class infrastructure, and drive sustainable growth across markets. We are seeking an experienced Senior Mobile App Engineer to help build, scale, and evolve the SKIMS DTC mobile application.

This role contributes to a production-grade Flutter application supporting a rapidly growing global fashion brand, delivering high-impact features across shopping, personalization, loyalty, and seamless checkout experiences.

The ideal candidate brings deep expertise in Flutter, strong command of clean architecture and scalable mobile patterns, and a passion for crafting performant, intuitive, and conversion-driven mobile commerce experiences. You thrive in fast-paced environments, take ownership of technical quality, and are motivated by building products used by millions of customers worldwide.

• 5+ years professional software engineering with 3+ years Flutter/Dart development
• Shipped production Flutter apps to App Store and Play Store at scale
• Expert-level Flutter and Dart with strong null safety practices
• BLoC pattern () and clean architecture (domain/data/presentation layers)
• Code generation tools:
  Freezed, JSON Serializable, Retrofit, Injectable/Get It
• Local storage solutions:
  Object Box, Hive, or similar embedded databases
• Dio networking with RESTful API integrations and error handling
• Comprehensive testing: unit, widget, BLoC tests with mocktail/
• E-commerce experience: shopping cart, checkout, product catalogs, user authentication

• Firebase ecosystem:
  Analytics, Crashlytics, Remote Config, Cloud Messaging
• Multi-platform analytics (Braze, Sentry, Google Analytics, Quantum Metrics)
• Shopify API or headless commerce platform experience
• Marketing automation (Klaviyo, Braze) and push notification implementation
• CI/CD with Git Hub Actions
• Platform channels with native iOS (Swift) and Android (Kotlin)
• FVM, l10n/i18n with , accessibility standards

• Design and develop high-quality Flutter features following BLoC pattern and clean architecture
• Build complex, performant UIs with pixel-perfect design implementation and smooth animations
• Integrate third-party services:
  Shopify APIs, payment gateways, analytics platforms, CMS
• Implement repository pattern with abstract interfaces and domain models
• Write comprehensive unit, widget, and integration tests (80%+ coverage target)
• Optimize app performance, memory usage, and crash-free rates
• Conduct code reviews and mentor junior developers on Flutter best practices
• Manage CI/CD pipelines and coordinate app releases
• Collaborate with product, design, and backend teams on feature planning and technical decisions
• Monitor production metrics via Crashlytics/Sentry and proactively resolve issues

• Deep understanding of Flutter internals, widget lifecycle, and performance optimization
• Expertise in complex state management with BLoC and reactive programming (RxDart, Streams)
• Strong architectural decision-making balancing scalability, maintainability, and performance
• Proficiency with code generation workflows and dependency injection patterns
• Experience debugging across Dart, Flutter framework, and native platform layers

• Understanding of mobile commerce user journeys and conversion optimization
• Experience with high-traffic consumer applications
• Customer-centric approach with data-driven decision making
• Familiarity with payment flows, loyalty programs, and personalization

• Excellent communication skills with technical and non-technical stakeholders
• Ownership mentality - driving features from design through production
• Proven mentorship capabilities and knowledge sharing
• Team-first attitude with positive, collaborative approach
• Comfortable with ambiguity and defining technical requirements

• Build a high-visibility consumer app used by millions in a premier fashion brand
• Shape…