Software Engineer, Safety Experience

About the role

🚀 Join the Future of Commerce with Whatnot!

Whatnot is the largest live shopping platform in North America and Europe to buy, sell, and discover the things you love. Whether it's trading cards, fashion, electronics, or live plants, our sellers are building real businesses across hundreds of categories. We're building live commerce at a scale that's never been done in the West, and there's no playbook to copy. The people here are shaping how an entirely new industry develops.

As a remote co-located team, we're inspired by our values and anchored in hubs across the US, UK, Ireland, Poland, Germany, and Australia. We move fast, stay close to our users, and focus on the work that drives the most impact.

We're one of the fastest growing marketplaces and were recently named the #1 Best Startup Employer in America by Forbes. 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

Safety XP sits at an intersection of real time auctions, transactions and video, all happening at once. This team decides what can be sold, to whom, and where and what happens the moment something goes wrong. Some of what you'll dig into:

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Giving people real control over their accounts, enforced in the moment, not on a delay.

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Navigating a genuinely complex global regulatory landscape, where the rules of what's sellable change by country and by season.

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Building the backbone that both "here's why this got flagged" and "here's why this got blocked" run on, the kind of system every other safety feature ends up depending on.

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Working shoulder-to-shoulder with leadership to decide and deliver what’s right for the end users.

You'll own genuinely varied problems, not one narrow project, and you'll be in the room for how they get solved on every platform, not just the API layer.

What you'll do:

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Design and develop systems to protect the platform: Build and iterate on production algorithms and infrastructures that mitigate systemic risks and safeguard buyers, sellers, and the broader Whatnot community.

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Balance risk and user experience: Proactively monitor the impact of protective systems on trusted users, ensuring interventions deliver more value than friction.

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Respond in real time to threats: Architect event-driven pipelines and detection frameworks that enable near real-time responses to high-risk user behavior.

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Contribute across the full development lifecycle: Engage in ideation, scoping, prototyping, load testing, deployment, and monitoring to deliver resilient and scalable solutions.

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Drive cross-team initiatives: Collaborate across multiple product surfaces and operational teams, surfacing insights to leadership and stakeholders through dashboards, notebooks, and clear written documentation.