Senior iOS Engineer: Personalization & Modern Architecture

Thrive Market; United States; Remote; USD 175,000 - 190,000; Full time

Benefits offered by this job

Health benefits

Equity

401k plan

Flexible PTO

ClassPass membership

Office in Playa Vista

Free Thrive Market membership

Life Coaching & Therapy

Job summary

Thrive Market is seeking a Senior Software Engineer, iOS, to advance a modern, modular iOS app. You will stabilize the platform, reduce technical debt, and lead migration to a scalable architecture while partnering with Product and Design to deliver personalized, data-informed experiences.

You will help migrate legacy UIKit to SwiftUI, implement a Design System DSL, and own code quality through reviews, testing, and architectural decisions.

Qualifications

• 7+ years of iOS development experience.
• Proficiency in Swift; able to work in mixed Swift/Objective-C codebases.
• Strong understanding of application architecture and the “why’s” behind it.
• 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).

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.
• Build a deeply personalized shopping experience that makes every member feel like the app was built just for them.
• Migrate legacy UIKit components into a modular, reactive architecture with a Design System DSL.
• Partner with Product, Design, and Engineering in a Product Triad to ship the right problems for members.
• Ensure smooth, accessible, buttery animations and maintain the look and feel of the iOS app.
• Help move the organization from startup mode to mature systems mode with impactful projects.

Skills

iOS development

Swift

SwiftUI

UIKit

MVVM

Reactive programming

Unit testing

Code reviews

Dependency injection

Modular architecture

Git workflows

Tools

Swift Package Manager

Git

Xcode

Job description

Thrive Market is seeking a Senior Software Engineer, iOS, to advance a modern, modular iOS app. You will stabilize the platform, reduce technical debt, and lead migration to a scalable architecture while partnering with Product and Design to deliver personalized, data-informed experiences.

You will help migrate legacy UIKit to SwiftUI, implement a Design System DSL, and own code quality through reviews, testing, and architectural decisions.