Staff iOS Engineer

About ThredUp

ThredUp is transforming resale with technology and a mission to inspire the world to think secondhand first. By making it easy to buy and sell secondhand, ThredUp has become one of the world's largest online resale platforms for apparel, shoes and accessories. Sellers love ThredUp because we make it easy to clean out their closets and unlock value for themselves or for the charity of their choice while doing good for the planet. Buyers love shopping value, premium and luxury brands all in one place, at up to 90% off estimated retail price. Our proprietary operating platform is the foundation for our managed marketplace and consists of distributed processing infrastructure, proprietary software and systems and data science expertise. With ThredUp’s Resale-as-a-Service, some of the world's leading brands and retailers are leveraging our platform to deliver customizable, scalable resale experiences to their customers. ThredUp has processed over 172 million unique secondhand items from 55,000 brands across 100 categories. By extending the life cycle of clothing, ThredUp is changing the way consumers shop and ushering in a more sustainable future for the fashion industry.

Recognized on TIME Most Influential Companies of 2023, Digiday's WorkLife 50 2023, TIME's Best Inventions of 2022, and Lattice's People Success Awards 2022.

How You Will Make an Impact

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.

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. This candidate will proactively tackle ambiguous challenges, delivering pragmatic solutions that skillfully balance immediate needs with long-term scalability.

In This Role You’ll Get To :

• 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.

What We’re Looking For :

At ThredUp, your base pay is one part of your total compensation package. This role pays between $225,000 and $240,000, and your actual base pay will depend on your skills, qualifications, experience, and location.

Many ThredUp employees also have the opportunity to own shares of ThredUp stock, ThredUp employees are 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. Subject to eligibility requirements, you’ll also receive other benefits : Comprehensive medical & dental coverage, vision, 401k, life and disability insurance.

This role is not eligible for visa sponsorship.