Software Engineer, Performance Marketing

Whatnot•Los Angeles, CA

1d•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. From fashion, beauty, and electronics to collectibles like trading cards, comic books, and even live plants, our live auctions have something for everyone. And we’re just getting started! As one of the fastest growing marketplaces, we’re looking for bold, forward-thinking problem solvers across all functional areas. 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. We’re looking for a Software Development Engineer who lives at the intersection of engineering, growth, and paid media. You’ll build and own the systems that power performance marketing across channels like Google Paid Search, Meta Ads, TikTok Ads, Product Listing Ads, and attribution platforms such as AppsFlyer. 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 Seattle, New York City, San Francisco, or Los Angeles hub.

Requirements

5+ years of experience as a Software Development Engineer (or equivalent)
Hands-on experience supporting performance marketing
Strong understanding of paid media platforms:
Google Ads (Paid Search, Shopping / PLA)
Meta Ads
TikTok Ads
Practical experience with AppsFlyer (or similar MMP like Adjust / Branch)
Solid grasp of:
Attribution models (last click, MTA, SKAN, probabilistic vs deterministic)
Conversion tracking and event schemas
Campaign structure and optimization levers
Strong backend skills (e.g. Python, Java, Go, or similar)
Experience with data systems (SQL, warehouses, ETL/ELT, streaming is a plus)

Nice To Haves

Experience with SKAdNetwork, Privacy Sandbox, or ATT impacts
Feed management for PLAs (catalogs, pricing, availability, disapprovals)
Experimentation frameworks (A/B testing, lift studies)
Experience working at a consumer app, marketplace, or e-commerce company

Responsibilities

Build and maintain data pipelines that ingest, normalize, and validate marketing data from platforms like Google Ads, Meta, TikTok, PLA feeds, and AppsFlyer
Create automation tools for bidding, budget pacing, creative rotation, and campaign experimentation
Implement attribution/tracking logic (MMP, SKAN, postbacks, conversion windows, deduplication, incrementality)
Partner closely with Growth, Marketing, and Data teams to turn hypotheses into shippable systems

Benefits

Flexible Time off Policy and Company-wide Holidays (including a spring and winter break)
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.