Senior Mobile App Engineer

Department: Technology

Employment Type: Full Time

Location: Los Angeles HQ

Compensation: $150,000 - $170,000 / year

Description

SKIMS is a solutions-oriented brand creating the next generation of underwear, loungewear, shapewear, and essentials. We are setting new standards by delivering technically innovative, comfort-driven products with elevated design for everybody.

At the intersection of culture, innovation, and commerce, SKIMS is a global brand redefining modern apparel. Our teams are built on creativity, collaboration, and operational excellence, and we are committed to fostering an inclusive, high-performance environment where ambitious, curious, and values-driven individuals can do the best work of their careers.

As we continue to scale globally, our HQ teams play a critical role in shaping strategy, building world-class infrastructure, and driving sustainable growth across markets.

We are seeking an experienced Senior Mobile App Engineer to help build, scale, and continuously evolve the SKIMS DTC mobile application. In this role, you will contribute 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.

Key Responsibilities

Required:

• 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 (flutter_bloc) and clean architecture (domain/data/presentation layers)
• Code generation tools: Freezed, JSON Serializable, Retrofit, Injectable/GetIt
• Local storage solutions: ObjectBox, Hive, or similar embedded databases
• Dio networking with RESTful API integrations and error handling
• Comprehensive testing: unit, widget, BLoC tests with mocktail/bloc_test
• E-commerce experience: shopping cart, checkout, product catalogs, user authentication

Preferred:

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

Skills, Knowledge and Expertise

• 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

What We're Looking For

Technical Excellence:

• 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

E-Commerce & Product Mindset: