Base Salary
$210k - $230k/yr
Responsibilities
- Design and maintain core iOS architecture and shared components, including modularization, dependency management, navigation, and reusable patterns.
- Build and harden networking, real-time, and persistence layers for live video, chat, and bidding.
- Lead app stability and performance improvements involving crashes, hangs, launch time, memory, scrolling, and video performance.
- Partner with product teams as an internal platform consultant and provide technical guidance, documentation, and adoption support.
- Improve developer velocity through build systems, CI, test infrastructure, and release tooling.
- Build observability capabilities including crash reporting, performance monitoring, and alerting.
Requirements
- Bachelor’s degree in Computer Science or a related field, or equivalent practical experience.
- 6+ years of professional iOS engineering experience, including meaningful infrastructure, architecture, or platform work.
- Deep expertise in Swift and iOS fundamentals, including runtime behavior, memory management, Swift Concurrency, GCD, and the app lifecycle.
- Demonstrated measurable improvements to app stability or performance, such as crash-free rate, launch time, or hang rate.
- Experience designing APIs and frameworks used by other engineers, including abstraction, migration, and adoption decisions.
- Experience with profiling and debugging tools such as Instruments, crash symbolication, and memory graphs.
- Preferred experience includes WebSockets, AVFoundation, live video, experimentation, feature flags, client analytics infrastructure, large iOS codebases, Bazel, Tuist, SPM, GraphQL clients, offline and caching strategies, Core Data, SQLite, GRDB, or open-source iOS libraries and tooling.
Benefits
- Flexible work-from-home or office-hub arrangement, with US team members required to live within commuting distance of New York, Seattle, San Francisco, or Los Angeles.
- Generous holiday and time-off policy, health insurance options, work-from-home support, home-office setup allowance, and monthly cell phone and internet allowance.
- Wellness, childcare, family-planning, and dogfooding allowances.
- US 401(k) Traditional and Roth plans with employer matching up to 4% of base salary, plus international pension plans.
- Sixteen weeks of paid parental leave plus one month of gradual return to work, subject to applicable country leave requirements.
Tech Stack
Categories
About Whatnot
Whatnot is the largest livestream shopping platform in the US, UK, and Europe. Millions of people come to Whatnot every day to buy, sell, and connect over the things they love, from sneakers to sports cards, vintage fashion to fine jewelry, comics to Pokémon, beauty, electronics, and hundreds of other categories. In 2025, live sales on Whatnot surpassed $8B, more than doubling the year before. Over 20 million accounts were created last year alone, and we have been the #1 shopping app in both the US and UK. We've built a real business, but we're nowhere near done. Live commerce at this scale has never been done in the West, which means the people here now are shaping how an entirely new industry develops. The pace here is fast and the expectations are high. We move quickly, prioritize ruthlessly, and trust people to own their work end-to-end. In return, careers grow faster, impact is real, and your colleagues will raise your standards. It's an environment built for people who want to do the best work of their careers alongside others doing the same. We're a remote, co-located team with hubs in the US, UK, Ireland, Poland, and Germany, and we're hiring across every function.