Software Engineer, Financial Platform

Whatnot; Dublin; Hybrid; EUR 90,000 - 150,000; Full time

Benefits offered by this job

FlexibleTimeoffPolicy

HealthInsurance

WorkFromHomeSupport

HomeofficeSetupAllowance

MonthlyCellphoneInternetAllowance

WellnessAllowance

ChildcareAllowance

FamilyPlanningBenefits

Job summary

Whatnot is building a leading live-commerce platform with a global footprint. The Financial Platform team drives the core systems for earnings, fees, costs, and cross-border charges, handling billions in monthly volume.

We are seeking a Software Engineer to design and own reliable financial systems, enable new markets, and balance correctness with speed. You will partner with product, finance, and operations, owning projects end-to-end, with a flexible work model including Dublin hub proximity.

Qualifications

• 3–5+ years of software development experience building scalable systems.
• Experience with payment systems and international commerce is a plus.
• Comfort with multiple programming languages and ownership of projects from inception to production.

Responsibilities

• Design, build, and own reliable financial systems that support billions of dollars in transaction volume.
• Develop scalable infrastructure to launch new markets and products.
• Make thoughtful trade-offs across correctness, reliability, speed, and scalability.
• Own projects end-to-end from problem understanding to launch and iteration.
• Collaborate with engineering, product, finance, and operations to solve complex financial problems.
• Shape architecture and technical direction of Whatnot’s financial platform as the business scales.

Skills

Python

Elixir

JavaScript

System design

Ownership

Job description

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

The Financial Platform team at Whatnot is fundamental to the company's global operations. Our systems are at the heart of every platform transaction, determining earnings, fees, and costs dynamically across a global marketplace; understanding and charging tax and cross-border duties; and accurately managing returns, refunds, and seller payouts at scale. Each month, we are responsible for billions of dollars in transaction volume, making us one of the most trusted and essential systems in the business.

As a Software Engineer on this team, you will:

• Design, build, and own reliable financial systems that support billions of dollars in transaction volume.

• Develop scalable infrastructure that enables Whatnot to launch new markets, products, and ways for buyers and sellers to transact.

• Make thoughtful technical trade-offs across correctness, reliability, speed, and scalability in systems where accuracy is critical.

• Own projects end-to-end, from understanding the problem and designing the solution through launch and iteration.

• Partner across engineering, product, finance, and operations to solve complex financial and marketplace problems.

• Help shape the architecture and technical direction of Whatnot’s financial platform as the business scales.

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 Dublin hub.

You

People who do well at Whatnot tend to be comfortable figuring things out as they go, biased toward action, and genuinely curious about what they're building. They care more about outcomes than credit and stay close to the product and the people using it.

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)

Benefits

• FlexibleTimeoffPolicyandCompany-wideHolidays(includingaspringandwinterbreak)

• HealthInsuranceoptionsincludingMedical,Dental,Vision

• WorkFromHomeSupport

  • Homeofficesetupallowance

  • Monthlyallowanceforcellphoneandinternet

• Carebenefits

  • Monthlyallowanceforwellness

  • AnnualallowancetowardsChildcare

  • Lifetimebenefitforfamilyplanning,suchasadoptionorfertilityexpenses

• Retirement;401kofferingforTraditionalandRothaccountsintheUS(employermatchupto4%ofbasesalary)andPensionplansinternationally

• 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!).

• ParentalLeave

  • 16weeksofpaidparentalleave+onemonthgradualreturntowork*companyleaveallowancesrunconcurrentlywithcountryleaverequirementswhichtakeprecedence.

Please note: Whatnot will only contact you through official @whatnot.com email addresses. If you see an email impersonating a Whatnot recruiter, please disregard and report it as spam.

EOE

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.