Senior Software Engineer, iOS

Thrive Market is an online, membership-based market focused on making healthy living easy and affordable. They are seeking a Senior Software Engineer, iOS to lead the evolution of their iOS app, enhancing user experience and ensuring platform stability while collaborating closely with Product and Design teams.

Responsibilities:

• Lead the end-to-end design and implementation of complex features
• Maintain high code quality through rigorous code reviews, unit testing, and adherence to SOLID principles
• Identify and resolve bottlenecks, memory leaks, and crashes to ensure a 99.9% crash-free session rate
• Work alongside Product Managers to translate business requirements into technical specifications and realistic sprint goals
• Stay at the forefront of the Apple ecosystem (WWDC updates, Swift evolution) and integrate relevant technologies into our workflow
• Contribute to the growth of the team by sharing knowledge, documenting best practices, and participating in architectural discussions
• Building a deeply personalized shopping experience that makes every member feel like the app was built just for them
• You’ll be a key player in migrating legacy UIKit components into a modular, reactive architecture with a Design System DSL
• You’ll partner closely with Product, Design, and Engineering in a tight feedback loop (the "Product Triad"), ensuring we aren't just shipping code, but solving the right problems for our members
• From butter-smooth animations to ensuring our app is accessible to everyone, you’ll be the guardian of the "look and feel" of our iOS experience
• You'll join an engineering culture committed to moving from scrappy startup mode to mature systems mode, with opportunities to take on meaty, impactful engineering projects

Requirements:

• 7+ years of iOS development experience
• Strong proficiency in Swift; ability to work in mixed Swift/Objective-C codebases
• Strong understanding of application architecture and the “why's” behind it
• Experience with LLM coding assistants. Familiarity with the current state of agentic development
• Experience with SwiftUI and UIKit
• Experience with MVVM or similar architectural patterns
• Experience with reactive programming (Combine, RxSwift, or ReactiveObjC)
• Experience with local persistence and caching strategies
• Experience writing unit tests and working with mocks/test doubles
• Understanding of dependency injection and writing testable code
• Familiarity with modular architecture using Swift Package Manager (SPM)
• Familiarity with Git and collaborative development workflows
• Experience migrating legacy codebases (Objective-C → Swift, UIKit → SwiftUI)
• E-commerce or consumer app experience
• Familiarity with analytics platforms (Amplitude, etc.)
• Experience with A/B testing / feature flagging (Optimizely, LaunchDarkly)
• Experience with accessibility implementation (VoiceOver, Dynamic Type)