Software Engineer, Ads

Whatnot
Krakow
Workplace: RemoteFull timeFunction: Software EngineeringExperience: 4+ yearsEducation: bachelorsSkills: ["Extreme ownership","Strong communication","Collaboration","Product-minded approach","Curiosity"]

Build and scale ads products and systems that help sellers grow their businesses on Whatnot. Own problems end to end across the ads stack—bidding & targeting, ranking/auction, serving, campaign management, and seller tooling—while digging into data, logs, and system behavior to ensure performance and correctness. Collaborate across engineering, product, design, and data to ship high-quality features quickly and make sound product tradeoffs.

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FursaFursa
Whatnot
Whatnot
1 day ago

Software Engineer, Ads

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Source: Company careers pageValidated by: Fursa AI
Last checked: 15 hours agoStatus: Live

Job Summary

Build and scale ads products and systems that help sellers grow their businesses on Whatnot. Own problems end to end across the ads stack—bidding & targeting, ranking/auction, serving, campaign management, and seller tooling—while digging into data, logs, and system behavior to ensure performance and correctness. Collaborate across engineering, product, design, and data to ship high-quality features quickly and make sound product tradeoffs.
Location: Krakow
Workplace: Remote
Employment Type: Full time
Job Function: Software Engineering
Seniority: Mid level

Key Responsibilities

  • •Build ads products across the full ads stack, including bidding & targeting, ranking/auction, serving, campaign management, and seller tooling.
  • •Develop highly scalable ads systems that support the operation of an online advertising system and help sellers differentiate on Whatnot.
  • •Analyze data, logging, and system behavior to reason about performance, correctness, and impact.
  • •Understand buyer and seller experiences and help them effectively scale their business through ads products.
  • •Ship high-quality features quickly while making sound product decisions and tradeoffs.

Key Requirements

  • •Bachelor’s degree in Computer Science (or related field) or equivalent practical experience.
  • •4+ years of professional software engineering experience building and shipping backend systems in production environments.
  • •Strong experience designing, building, and operating scalable, maintainable backend services.
  • •Ability to make thoughtful tradeoffs between speed, quality, reliability, and long-term maintainability.
  • •Comfort owning ambiguous problem spaces and turning them into clear technical plans and shipped outcomes.
Experience:4+ yearsBackend systemsOnline advertisingMarketplacesE-commerceCross-functional product environments
Education:Bachelor's
Skills:Extreme ownershipStrong communicationCollaborationProduct-minded approachCuriosity

Company Brief

Whatnot
Whatnot is a live-stream shopping marketplace connecting sellers and collectors for trading cards, toys, and collectibles. The platform hosts live auctions and interactive streams, enabling creators and small businesses to sell directly to engaged communities.
Industry: Online Marketplaces
Company Size: Large (251 to 1,000 employees)
Growth: Scaleup
Valuation: Unicorn (USD 1B+)
Funding: Series D
Headquarters: United States
Founded: 2019
WebsiteLinkedIn