Internship Contract Flutter Developer Jobs in California

Overview

THE ROLE: 

Build and scale next-generation mobile experiences by operating as an innovation engineer, not just a feature implementer. In this role, you'll turn ambiguous ideas into validated, high-impact mobile solutions - balancing rapid experimentation with long-term platform stability and scalability.

You'll play a key role in shaping what gets built, why it matters, and how it can scale across mobile ecosystems. Working at the intersection of product discovery, platform evolution, and technical experimentation, you'll apply deep mobile expertise to both strategy and execution - influencing mobile direction as much as you ship code.

This is a hands-on role for builders who thrive in uncertainty, enjoy early-stage problem-solving, and want to leave a lasting mark on mobile platforms.  This is not a traditional mobile delivery role.

You will:    Work in high-ambiguity environments    Build prototypes before roadmaps    Validate assumptions through experiments, data, and learning    Help transition validated concepts into scalable, production-grade systems

HOW YOU WOULD CONTRIBUTE: 

Discovery, Framing & Experimentation    Partner with product, build, data, and business collaborators to frame problems, not just implement requirements      Translate loosely defined ideas into hypotheses, experiments, and technical prototypes    Lead or chip in to discovery sprints, feasibility studies, and technical spikes    Challenge assumptions and propose alternative mobile experiences or architecturesPrototyping & Validation    Build rapid prototypes (throwaway and evolutionary) to test user value and technical feasibility    Instrument prototypes with analytics to measure adoption, performance, and learning outcomes    Run controlled experiments (feature flags, pilots, A/B tests) where appropriate    Make informed tradeoffs between speed, quality, scalability, and learningMobile Architecture & Platform Thinking    Build native and cross-platform mobile solutions with platform and ecosystem thinking      Influence mobile architecture decisions, frameworks, SDKs, and integration patterns    Balance innovation velocity with long-term maintainability and platform evolution    Collaborate on API contracts, data models, and service boundaries

Engineering Excellence    Write clean, efficient, and maintainable mobile code aligned with platform guidelines      Implement secure, performant, and accessible user experiences    Optimize performance across memory, battery, startup time, and responsiveness    Apply mobile security guidelines, including authentication, encryption, and data protection  Teamwork & Influence    Collaborate closely with UX, backend, data, and product teams to build cohesive solutions      Provide technical mentorship and architectural guidance to mobile engineers    Communicate sophisticated technical ideas clearly to non-technical collaborators      Influence direction through prototypes, evidence, and technical insightOperational Enablement    Advise on mobile DevOps practices, including CI/CD, automated testing, and release strategies    Support transition of validated concepts from innovation into scaled delivery teams    Document architecture, experiments, findings, and technical decisions 

Qualifications

SKILLS AND BACKGROUND REQUIRED TO BE SUCCESSFUL: 

    5+ years of professional mobile development experience; experience working with diverse technology stacks and multiple projects preferred    Proven experience across both exploration (early-stage) and exploitation (scaled delivery) preferred    Native mobile development (Swift/SwiftUI for iOS and/or Kotlin for Android)    Cross-platform development frameworks (React Native, Flutter, or similar)    Mobile application architecture and design patterns (MVVM, MVC, Clean Architecture)    API integration, mobile networking, and data synchronization    Lifecycle management, memory management, diagnostics, and performance optimization    Proven track record to work effectively with incomplete or evolving requirements    Strong problem-framing and systems-thinking skills    Experience building prototypes or proof-of-concepts-not just production features    Curious approach with a bias toward experimentation and learning      Ability to articulate why a solution works, not just how it's built    Proven track record of delivering production mobile applications with high quality and performance    Deep understanding of iOS and Android platform capabilities, limitations, and guidelines    Familiarity with mobile development tools and IDEs (Xcode, Android Studio)      Strong problem-solving skills for complex technical challenges    Ability to communicate technical concepts clearly to non-technical collaborators      Mobile analytics (such as Firebase, Crashlytics), experimentation, and observability tooling    Experience with feature flags, phased rollouts, or experimentation platforms    Exposure to emerging mobile technologies (AI-enabled UX, AR, sensors, wearables)    Contributions to open-source, side projects, or experimental work    Experience with mobile database solutions (Core Data, Room, Realm, SQLite)    Understanding of mobile security protocols and common vulnerabilities        Familiarity with mobile CI/CD tools (Fastlane, Jenkins, GitHub Actions)      Familiarity with cloud platforms (AWS, Azure, Google Cloud) for mobile backends    Experience with augmented reality (ARKit, ARCore) or other developing mobile platforms      Understanding of app store submission and review processes

Education

    Minimum: Bachelor's degree in Computer Science, Software Engineering, or equivalent experience    Preferred: Master's degree or equivalent experience with a demonstrated innovation portfolio (prototypes, experiments, published apps)      Certifications: Platform-specific certifications (Apple Developer certification, Google Associate Android Developer), and relevant technology certifications are valuable    Equivalent Experience: Outstanding portfolios showing sustained innovation impact may substitute for formal education.  

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US Benefits StatementHerbalife offers a variety of benefits to eligible employees in the U.S. (limited to the 50 States and the District of Columbia), which includes Group Health Programs, other Voluntary Benefit Programs, and Paid Time Off. Group Health Programs include Medical, Dental, Vision, Health Savings Account (HSA), Flexible Spending Accounts (FSA), Basic Life/AD&D; Short-Term and Long-Term Disability, and an Employee Assistance Program (EAP). Other Voluntary Benefit Programs include a 401(k) plan, Wellness Incentive Program, Employee Stock Purchase Plan (ESPP), Supplemental Life/Critical Illness/Hospitalization/Accident Insurance, and Pet Insurance. Paid time off includes Company-observed U.S. Holidays, Floating Holidays, Vacation, Sick Time, a Volunteer Program, Paid Maternity and Paternity Leave, Bereavement Leave, Personal Leave and time off for voting.Employment Type: FULL_TIME