Whatnot

Full-stack Engineer

• Drive cross-org technical impact by creating capabilities that do not yet exist
• Establish technical direction across organizational boundaries through strategy documents, RFCs, and architecture reviews
• Identify systemic risks and opportunities across multiple organizations
• Build patterns and frameworks that become engineering defaults
• Steward the health and evolution of multiple systems
• Shape engineering culture through mentorship, internal collaboration, external speaking, and new programs or processes
• Deliver complex technical initiatives at consumer scale

Senior Staff Software Engineer

• Lead Whatnot's global tax and treasury functions
• Own tax strategy, reporting, and compliance
• Manage cash and liquidity, banking and investments
• Build and oversee the teams, controls, and systems supporting a rapidly scaling marketplace
• Partner with Finance, Payments, Legal, Product, and Engineering
• Manage risk and improve capital efficiency
• Build infrastructure that scales with new products and markets
• Support international expansion, M&A, financing transactions, and complex legal entity structures
• Lead liquidity planning, cash forecasting, investments, banking relationships, foreign exchange risk, and intercompany funding
• Build teams, systems, controls, and processes in a fast-changing environment
• Use Whatnot as both a buyer and seller as part of the role

Head of Tax, Treasury

Risk

• Provide inbound email support for Dutch users experiencing trust and safety issues
• De-escalate and educate customers through clear and accurate information exchange
• Investigate complex and sensitive Trust & Risk cases while maintaining customer satisfaction
• Serve as escalation point for issues requiring nuanced language and cultural understanding
• Work with other departments to research and resolve open questions
• Work through backlog of open issues and monitor key operations performance
• Represent the company with integrity and professionalism
• Review key metrics and use data to make informed decisions

Trust & Risk Agent, Dutch Speaking

Machine Learning Engineer

• Lead research projects across marketplace dynamics, including simulation, auction and allocation mechanics, long-term objective modeling, exploration and information value, and marketplace experimentation methods
• Take ideas from hypothesis to production through literature review, prototyping, offline validation, shadow testing, and online experiments shipped through partner teams in Discovery and the Seller organization
• Build learned simulators predicting segment-level effects of ranking and policy changes
• Build surrogate models of long-term marketplace outcomes
• Model auction and bidding dynamics and discovery exposure allocation as a portfolio problem, including allocation to rising sellers
• Advance marketplace evaluation through off-policy evaluation, switchback and interference-robust experiment designs, and variance reduction
• Contribute to external technical presence through publications, open-source work, and public benchmarks
• Collaborate with cross-functional teams and influence roadmaps

Machine Learning Engineer, Applied Research

• Build ads products across the full ads stack, including bidding and targeting, ranking/auction, serving, campaign management, and seller tooling
• Build highly scalable advertising systems supporting online advertising and helping sellers differentiate themselves on Whatnot
• Analyze data, logging, and system behavior to evaluate performance, correctness, and impact
• Understand buyer and seller experiences and help them scale their businesses through ads products
• Own problems end to end and grow into new areas as the team scales
• Make sound product decisions, prioritize high-impact features, and ship high-quality products quickly
• Collaborate across engineering, product, design, and data

Software Engineer, Ads

Manager

• Own the contract lifecycle from drafting through execution and archive
• Negotiate standard and non-standard terms directly
• Own commercial contract amendments
• Build and maintain contract templates, playbooks, and Ironclad workflows
• Partner with relevant cross-functional teams on terms and process
• Own the contract repository and reporting
• Support contract processes across all types of commercial agreements

Contracts Manager

Communications

• Develop and lead Whatnot’s communications strategy in Australia
• Build understanding and credibility for live commerce among businesses and consumers
• Educate audiences about the power of live commerce
• Build and leverage relationships with Australian traditional and new media and other third parties
• Educate key audiences about Whatnot’s business, categories, policies, and values
• Build the communications function in Australia from the ground up
• Manage company responses to crises and navigate high-profile escalations in real time
• Establish and own a communications playbook for strategic and rapid-response best practices
• Lead storytelling across corporate, consumer, Trust & Safety, and policy-related priorities
• Report to the VP, Communications & Policy
• Participate in an in-person onboarding experience at a Whatnot office
• Use Whatnot as both a buyer and seller as part of the role

Senior Communications Manager

• Design, build, and ship features critical to growing the Japan market, including payment/payout methods, logistics integrations, seller onboarding and compliance, and locally tailored buyer and seller experiences
• Own technical strategy for Japan by partnering with the Japan GM to translate market needs into a roadmap, decide what to build and how, and own trade-offs
• Determine how Japan-market work fits into Whatnot’s global architecture
• Lead execution across multiple workstreams with engineers and cross-functional partners in Japan and globally
• Establish the technical foundation, architecture, patterns, quality bar, and culture for Whatnot’s engineering presence in Japan
• Act as the technical leader of the Japan engineering presence and bridge between the Japan business and global engineering organization