Staff iOS Engineer, ThredUp

$225-240k

Eligible for discretionary restricted stock unit awards, as well as a discount when purchasing ThredUp stock if voluntarily participating in ThredUp’s Employee Stock Purchase Plan

Java

iOS

Android

Kotlin

Swift

Objective-C

SwiftUI

UIkit

Senior and Expert level

San Francisco Bay Area

More information about location

3+ days a week in office (Oakland, CA)

Fashion resale platform

Be an early applicant

Fashion resale platform

501-1000 employees

B2CRetailFashionConsumer GoodseCommerce

Be an early applicant

$225-240k

Eligible for discretionary restricted stock unit awards, as well as a discount when purchasing ThredUp stock if voluntarily participating in ThredUp’s Employee Stock Purchase Plan

Java

iOS

Android

Kotlin

Swift

Objective-C

SwiftUI

UIkit

Senior and Expert level

San Francisco Bay Area

More information about location

3+ days a week in office (Oakland, CA)

501-1000 employees

B2CRetailFashionConsumer GoodseCommerce

Company mission

To inspire a new generation to think secondhand first.

Job

Company

Role

Who you are

We're seeking a strategic, collaborative, and communicative technical leader who's passionate about mobile platform health and adept at mentoring to raise the team's technical bar
8+ years of professional experience building and scaling native iOS applications
Recognized expertise in Swift and Objective-C, with strong knowledge of UIKit and SwiftUI
Proven track record of leading architectural initiatives or re-architecture efforts at scale
Deep experience with concurrency, memory management, performance optimization, and system design for mobile applications
Experience driving cross-team technical projects, influencing technical strategy beyond a single product area
Proven ability to mentor and grow engineers, shaping engineering practices across teams
A product mindset: able to connect technical decisions to user experience and business outcomes
Curiosity and excitement about leveraging AI to accelerate mobile development (e.g., code generation, testing, performance optimization)
Familiarity with Android (Kotlin/Java) and an interest in collaborating with Android engineers to ensure platform parity is a plus
Exposure to Kotlin Multiplatform or other shared-code strategies, along with experience in consumer-facing e-commerce, search, or other high-scale user engagement applications is a plus

What the job involves

ThredUp is transforming the way people shop—and think—about secondhand fashion. Our iOS app is the primary way millions of customers discover and purchase secondhand clothing, making it one of the most critical drivers of our business
As a Staff iOS Engineer, you’ll take a leading role in shaping the future of this app. Reporting to the Senior Engineering Manager on the Merch Engineering team—which powers search, browse, and discovery across a constantly changing catalog of millions of unique SKUs—you’ll also provide platform-wide technical leadership
You’ll guide architectural modernization, raise the technical bar, and influence cross-team strategies that ensure our iOS app remains stable, scalable, and fast for years to come
This candidate will proactively tackle ambiguous challenges, delivering pragmatic solutions that skillfully balance immediate needs with long-term scalability
Set technical direction for the iOS app, ensuring long-term stability, scalability, and performance across critical user experiences
Ensure robust release pipelines, testing, monitoring, and observability practices are in place across mobile teams
Drive architectural modernization and explore strategies to reduce redundancy and accelerate development velocity (e.g., Kotlin Multiplatform), while preserving a native-first iOS experience
Collaborate with cross-functional and cross-team partners to align mobile technical strategy with product goals and business priorities
Mentor and guide engineers across mobile teams, shaping best practices and raising the technical bar

Our take

Over 40% of Gen Z consumers claim to have bought used clothing as opposed to 20% of Gen X and Boomers. Yet, despite this change in fashion trends, consumers must often rely on brick-and-mortar thrift stores and unregulated second-hand eCommerce marketplaces in order to access to find pre-owned clothing.

ThredUp provides an online marketplace for the buying and selling of secondhand fashionwear, offering affordable prices on discount clothing whilst promising a regulated and consistent approach to quality and cleanliness standards. The company acquires its clothing through sellers sending packages of clothing, which the company then sifts through to decide what is sellable and what should be returned.

The company went public in 2021 and immediately acquired Remix, a European second-hand fashion outlet, as part of its international expansion plans. It has however struggled to achieve profitability thanks to global economic turmoil and a glut of new clothing in the fashion industry causing prices to drop sharply. It is focusing on reducing its operating costs and expanding its storage capacity, and is expected by analysts to weather the current conditions in good form.

Freddie

Company Specialist at Welcome to the Jungle

Insights

Top investors

0% employee growth in 12 months

Glassdoor (3.1)

Trustpilot (1.4)

Company

Funding (last 2 of 7 rounds)

Aug 2019

$100m

SERIES F

Sep 2015

$81m

SERIES E

Total funding: $232.9m

Company benefits

Competitive salary (we leverage market data) + stock
Employee stock purchase plan
Flexible PTO (take the time you need) + 13 company holidays (US offices)
Paid Sabbatical after 3 years of full time employment
Generous paid parental leave for new mothers and fathers
Medical, dental, vision, 401k, life and disability insurance offered

Company HQ

Old Oakland, Oakland, CA

Leadership

James Reinhart

(CEO)

Has an MBA from Harvard Business School and started out in teaching. Also co-founded the Beacon Education Network.

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