Principal II, Application Development

Herbalife•Torrance, CA

1d•Hybrid

About The Position

As a Principal, Application Development, you’ll serve as the technical go-to for our mobile application ecosystem—setting engineering direction, leading delivery, and providing mentoring to other developers. You’ll work across product, QA, DevOps, and business partners to compose and build secure, scalable experiences that reach a large user base. You’ll join a collaborative Agile team that values ownership, quality, and continuous improvement. We work closely with product, QA, DevOps, and business collaborators to deliver reliable, scalable mobile experiences. Expect open communication, regular peer reviews, and shared accountability—plus plenty of opportunities to learn, mentor, and make a visible impact.

Requirements

7+ years of deep, hands-on experience building and leading React Native mobile solutions for Android and/or iOS at scale
Expert proficiency in JavaScript and React, including advanced use of Context, hooks, and performance optimization patterns
Strong command of React architecture and standard methodologies, with a focus on maintainability, scalability, and high-performance mobile experiences
Proven experience designing and integrating secure, scalable payment solutions within mobile applications
Strong familiarity with modern mobile development workflows and tooling (GitHub Actions, Xcode, Android Studio) and the ability to influence engineering standards
Excellent problem-solving and communication skills, with the ability to lead and thrive in an Agile, multi-functional environment
Experience designing and building scalable, fault-tolerant, highly testable mobile and backend services, including performance tuning
Strong foundation in OOP, design patterns, SOLID principles, Dependency Injection/IoC, and observability (logging, monitoring, diagnostics)
Expertise with unit testing, CI/CD, source control strategies, automation, release management, and continuous delivery practices
Hands-on experience with responsive and multilingual mobile apps, relational and non-relational databases (including ORMs), and cloud-based architectures and services

Responsibilities

Lead end-to-end delivery of high-quality software through hands-on coding, testing, debugging, and thoughtful craftsmanship
Partner with an Agile squad (Product Owner, Scrum Master, engineers) to design, build, deploy, and operate internal applications
Design and implement scalable mobile functionality—clean business logic and modern UI for high-traffic, customer-facing experiences
Influence architecture across data, services, APIs, web, and mobile, bringing clear recommendations and practical tradeoffs
Tackle ambiguous, complex business and technical problems using modern tools, patterns, and engineering guidelines
Collaborate with product, customers, and collaborators to clarify requirements, right-size scope, and deliver measurable business value
Strengthen reliability through CI/CD and DevOps practices, supporting SRE needs (SLOs/SLAs) and owning production support and follow-ups
Mentor and grow other engineers, and help evolve standards, patterns, and technology choices across the platform