Software Engineer, Full Stack Developer

Software Engineer, Payments at Whatnot

$/yr - $/yr

Whatnot is the largest live shopping platform in North America and Europe, where we blend community, shopping, and entertainment into a unique marketplace experience. 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 such as trading cards, comic books, and even live plants, our live auctions cater to a wide audience. As one of the fastest‑growing marketplaces, we’re looking for bold, forward‑thinking problem solvers across all functional areas. Check out our latest 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 Payments – Treasury team at Whatnot is globally responsible for how our business moves and records money and credit in all customer transactions; and for ensuring that taxes, customs, returns, refunds, and more operate smoothly worldwide. We are deeply connected with the foundations of our business and have unlocked tremendous growth within and across international territories, while creating exciting new ways for our users to interact and transact on the platform.

You’ll collaborate closely with our partner team, Payments – Experience, and with other teams and senior leaders across Whatnot.

To keep the flywheel spinning, we’re looking to make substantial improvements to the critical infrastructure that supports payment scale and reliability, offers a diversity of payment options, mitigates fraud, and enhances transaction modelling and tax compliance to further provide a seamless international marketplace.

Each team member has individual responsibilities and is trusted to advance an aspect of the domain as an expert in collaboration with the leadership team. Your ability to make good trade‑offs, exercise sound judgment, and communicate effectively is essential to us.

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

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.

• Seven or more years of software development experience building scalable systems that can handle millions of users.
• Excellent product instincts—first thinking about users and long‑term objectives when designing technical solutions.
• Experience designing complex distributed systems that power products used by millions of users.
• Seasoned in defining the technical roadmap for a team, identifying areas that need improvement, and leading cross‑team initiatives.
• Ability to identify, architect, and build the right systems or products to improve the business.
• Deep understanding of and ability to explain trade‑offs in decision making.
• Expertise at enabling collaboration across multiple teams to deliver on cross‑team initiatives, while delegating ownership and uplifting those around you.
• Mentorship skills and prioritization of building inclusive, supportive teams.
• Project ownership—strong instincts for owning projects from inception to production to maintenance.
• Track record of shipping high‑quality products and features quickly and iteratively toward ultimate goals.
• Excellent problem‑solving skills with autonomy and initiative.
• Willingness to do frontend work when required.
• Rapid adaptation to new technologies.
• Experience working with payment systems, infrastructure, and international commerce (nice to have).
• Startup experience at a high‑growth company (nice to have).
• Knowledge of multiple programming languages (Python, Elixir, JavaScript are primary; direct experience is a plus).

• Generous holiday and time‑off policy
• Health insurance options: medical, dental, vision
• Work‑from‑home support, including home office setup allowance and monthly cellphone/internet allowance
• Care benefits: monthly wellness allowance, annual childcare allowance, lifetime benefit for family…