Software Engineer, Merchant Tooling

Whatnot•Los Angeles, CA

31d•Hybrid

About The Position

Whatnot is the largest live shopping platform in North America and Europe to buy, sell, and discover the things you love. We're re-defining e-commerce by blending community, shopping, and entertainment into a community just for you. As a remote co-located team, we're inspired by innovation and anchored in our values. With hubs in the US, UK, Germany, Ireland, and Poland, we're building the future of online marketplaces -together. The Inventory team supports sellers with managing their merchandise on Whatnot and representing it as accurately as possible so they can reach more buyers. They strive to do this in the fewest steps possible so sellers can get back to what they do best: selling and engaging with their community. Merchant Tooling, a subteam of Inventory, supports the needs of our largest and most complicated sellers. Whatnot is committed to helping our sellers turn their passion into a business, and as they grow their business with us their needs evolve. We build the systems to be able to support external and internal tooling for sellers with needs at scale, such as integrations to other e-commerce platforms, WMS, ERPs, and accounting software. As part of the Merchant Tooling team, you will design and build large-scale, highly reliable systems that support our largest and most complex customers. Your work will focus on: Delivering seamless, bi-directional data synchronization across marketplace, ecommerce, ERP, and other enterprise systems, ensuring accuracy, consistency, and low-latency data flow. Partnering closely with cross-functional stakeholders-including Product, Inventory, Operations, and external partners-to understand business needs, translate them into technical requirements, and drive aligned outcomes. Architecting and evolving enterprise-grade systems that remain intuitive for developers, easy to iterate on, and capable of supporting rapid product growth. Contributing to and accelerating the broader Inventory team roadmap, providing technical insight, proactive problem-solving, and hands-on implementation support. At its core, this team is responsible for building solutions that power how larger enterprise-level sellers interface with our platform. Your contributions will directly shape the foundation that enables these sellers to onboard, operate, and scale successfully. 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 Los Angeles, New York, San Francisco or Seattle hub. Curious about who thrives at Whatnot? We've found that low ego, a growth mindset, and leaning into action and high impact goes a long way here.

Requirements

5+ years of generalist software development experience in high growth startups
Bachelor's Degree in Computer Science or related field or equivalent work experience.
Experience building scalable systems (we primarily use Python, Elixir, JavaScript).
Ability to work across the stack (backend and frontend).
Excellent product instincts. You first think about users rather than the best technical solution.
Proven track record of delivering features. You are known for shipping products and features lightning-fast.
Ability to take ownership of an ambiguous area and define and then drive impact.
Ability to flexibly work across multiple workstreams, thriving in a fast-paced environment.
Scalability and data pipeline experience with SQL, dbt, etc.

Nice To Haves

Experience in Shopify, Channel Advisor, Magento, and other ecommerce SAAS products a plus
Experience in domain driven design a plus

Responsibilities

Delivering seamless, bi-directional data synchronization across marketplace, ecommerce, ERP, and other enterprise systems, ensuring accuracy, consistency, and low-latency data flow.
Partnering closely with cross-functional stakeholders-including Product, Inventory, Operations, and external partners-to understand business needs, translate them into technical requirements, and drive aligned outcomes.
Architecting and evolving enterprise-grade systems that remain intuitive for developers, easy to iterate on, and capable of supporting rapid product growth.
Contributing to and accelerating the broader Inventory team roadmap, providing technical insight, proactive problem-solving, and hands-on implementation support.

Benefits

Generous Holiday and Time off Policy
Health Insurance options including Medical, Dental, Vision
Work From Home Support
Home office setup allowance
Monthly allowance for cell phone and internet
Care benefits
Monthly allowance for wellness
Annual allowance towards Childcare
Lifetime benefit for family planning, such as adoption or fertility expenses
Retirement; 401k offering for Traditional and Roth accounts in the US (employer match up to 4% of base salary) and Pension plans internationally
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!).
Parental Leave
16 weeks of paid parental leave + one month gradual return to work company leave allowances run concurrently with country leave requirements which take precedence.