About the role
AppStack is building the core attribution infrastructure for the next generation of mobile apps. We help app companies grow revenue from paid ads with precise, device-level attribution and Enhanced App Campaigns (EACs) across Meta, Google, TikTok, and Apple Search Ads. Seed-stage, $10M raised, team of 10, based in Paris.
We're looking for a founding engineer to join as one of the earliest technical hires. You'll own large chunks of the product and infrastructure from day one.
What you'll do: • Build and ship core product features end-to-end across our attribution platform and SDKs • Work on real-time data pipelines processing device-level attribution events at scale • Develop and maintain SDKs (Swift, Kotlin, React Native, Flutter) and server-to-server integrations • Make foundational technical decisions that will scale with the company • Work across the full stack with a focus on TypeScript • Collaborate directly with the founders on product direction
What we're looking for: • 3+ years of professional engineering experience • Strong TypeScript skills • Experience with mobile SDKs, attribution, ad tech, or high-throughput data systems is a big plus • Experience building and shipping products from scratch or at early-stage companies • Comfort with ambiguity and ownership — you don't wait to be told what to do • Based in or willing to relocate to Paris
Nice to have: • Familiarity with mobile ad networks (Meta, Google, TikTok, Apple Search Ads) • Experience with Swift, Kotlin, React Native, or Flutter • Previous founding or early-stage startup experience