Software Engineer, Payments

The Payments team at Whatnot is fundamental to the product’s global operations. We power every order, collect every payment across a wide range of local and international methods, and manage returns, refunds, and seller payouts at scale. Each year, we process billions of dollars in payments, making us one of the most trusted and essential systems in the business. As Whatnot grows rapidly, our team is directly responsible for enabling that growth—by building reliable, scalable infrastructure and developing innovative ways for users to transact. We play a central role in shaping the future of commerce on the platform and are accountable for supporting the continued expansion of both buyers and sellers in the years ahead.

Each member of the team has a lot of individual responsibility and many more freedoms, so we need to hire people we can trust. Your ability to make good trade-offs and exercise good judgment is essential to us.

Team members in this role are required to be within commuting distance of Kraków or Wrocław, Poland.

👋 You

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 Software Engineer, you should have 3-5 or more years of software development experience building scalable systems that can handle millions of users, plus:

• You are comfortable with multiple programming languages (we primarily use Python, Elixir, JavaScript - knowledge of these in particular not required)
• Excellent product instincts. You first think about users rather than the best technical solution
• You can mentor others, and prioritize building inclusive, supportive teams
• Project owner - you have strong ownership instincts and can own projects from inception to production, and beyond
• You are known for shipping products and features lightning-fast
• You are an excellent problem solver and don’t need to be told exactly what to do
• You are open to doing frontend work when required
• Ability to pick up on new technologies very quickly
• Proven track record of delivering features
• Experience with payment systems, infrastructure, experiences and international commerce (nice to have)
• Startup experience at a high-growth company (nice to have)