Senior Backend Engineer, International Eng

Whatnot is the largest livestream 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.

The International Engineering team is responsible for building the operational and transactional systems that enable Whatnot to scale globally. This team focuses on everything that happens after a transaction occurs:

Cross-border transaction infrastructure

Tax and regulatory compliance

International post-purchase experiences

Marketplace operational tooling and automation

As a Senior Backend Engineer, you'll design and build highly scalable systems that support millions of transactions across multiple countries and regulatory environments.

Example projects include:

Building VAT tooling and seller-facing tax infrastructure for EU and UK markets

Designing cross-border shipping and Delivered Duty Paid (DDP) experiences that enable international commerce

Building systems to support market-specific requirements including Right of Withdrawal, refund automation, and regulatory compliance. Expanding Seller Protection Systems (SPS) into international markets