iOS Engineer, Seller Growth Product

Whatnot is the largest live shopping platform in North America and Europe to buy, sell, and discover the things you love. We’re re-defining e-commerce by blending community, shopping, and entertainment into a community just for you. As a remote co-located team, we’re inspired by innovation and anchored in our values. With hubs in the US, UK, Germany, Ireland, and Poland, we’re building the future of online marketplaces –together.

From fashion, beauty, and electronics to collectibles like trading cards, comic books, and even live plants, our live auctions have something for everyone.

And we’re just getting started! As one of the fastest growing marketplaces, we’re looking for bold, forward-thinking problem solvers across all functional areas. Check out the latest Whatnot updates on our news and engineering blogs and join us as we enable anyone to turn their passion into a business, and bring people together through commerce.

💻 Role

The Seller Growth Product team’s mission is simple but ambitious: accelerate seller success on Whatnot.

We build experiences that help sellers ramp up quickly and grow sustainably — from seamless onboarding and education to personalized incentives and challenges that motivate continued engagement. Our goal is to empower every seller to turn their passions into thriving businesses faster.

As our next iOS Engineer, you’ll help shape the mobile experiences that power this journey. You’ll work closely with design, product, and backend teams to deliver elegant, performant, and impactful features that drive real growth for sellers. Your work will focus on:

• Developing high-quality iOS features in Swift and SwiftUI that power seller onboarding, education, and incentive experiences — with a strong attention to detail, performance, and user experience.

• Collaborating cross-functionally with product, design, and data partners to define goals, manage scope, and align on priorities that balance speed, quality, and impact.

• Leveraging data and experimentation to guide product decisions — designing and analyzing A/B tests, digging into results, and iterating to accelerate seller success.

• Contributing across the stack when needed (our backend is primarily Python) and staying open to learning beyond iOS.

• Upholding engineering excellence through code reviews, documentation, and thoughtful technical discussions.

We offer flexibility to work from home or from one of our global office hubs, and we value in-person time for planning, problem-solving, and connection. Team members in this role must live within commuting distance of our Los Angeles, New York, San Francisco or Seattle hub.

Curious about who thrives at Whatnot? We’ve found that embodying a low ego, growth mindset, and high-impact drive goes a long way here.

As our next iOS Engineer, you should have 5+ years of experience building and shipping iOS apps using Swift and SwiftUI plus:

• Care deeply about product experience, sweating the details that make interfaces feel effortless and polished.

• Thrive in cross-functional environments, collaborating closely with product, design, and data partners to align on goals and deliver results.

• Are comfortable using A/B testing and data tools (e.g., Snowflake, SQL) to understand user behavior and guide product decisions.

• Communicate clearly, manage stakeholder expectations effectively, and take ownership from concept to launch.

• Are passionate about mentorship, sharing knowledge, and helping raise the team’s technical bar.

Bonus points for:

• Familiarity with Datadog or similar observability tools for performance monitoring.

• Experience building onboarding, education, or incentive-based products.

• Curiosity or experience working beyond iOS, collaborating with backend teams or contributing to APIs.
  

• Flexible Time off Policy and Company-wide Holidays (including a spring and winter break)

• Health Insurance options including Medical, Dental, Vision

• Work From Home Support

  • Home office setup allowance

  • Monthly allowance for cell phone and internet

• Care benefits

  • Monthly allowance for wellness

  • Annual allowance towards Childcare

  • Lifetime benefit for family planning, such as adoption or fertility expenses

• Retirement; 401k offering for Traditional and Roth accounts in the US (employer match up to 4% of base salary) and Pension plans internationally

• Monthly allowance to dogfood the app

  • All Whatnauts are expected to develop a deep understanding of our product. We're passionate about building the best user experience, and all employees are expected to use Whatnot as both a buyer and a seller as part of their job (our dogfooding budget makes this fun and easy!).

• Parental Leave

  • 16 weeks of paid parental leave + one month gradual return to work *company leave allowances run concurrently with country leave requirements which take precedence.

Whatnot is proud to be an Equal Opportunity Employer. We value diversity, and we do not discriminate on the basis of race, religion, color, national origin, gender, sexual orientation, age, marital status, veteran status, parental status, disability status, or any other status protected by local law. We believe that our work is better and our company culture is improved when we encourage, support, and respect the different skills and experiences represented within our workforce.