Senior Full-Stack AI Engineer
Primary stack
Nice to have's
Job description
About the Position
Senior Full-Stack AI Engineer
Coinis is on a mission to revolutionize the ad campaign process with AI. We are seeking a Senior Full-Stack AI Engineer to join our team and help us build and ship features for our AI-driven ad campaign platform.
Responsibilities
- Ship features across app.coinis.com, including Campaign launcher, Creative Library, Revise tool, and Advertise reporting.
- Wire new AI workflows into the product UI, such as Image Ads, Ad Clone, UGC Style, Before-After, and Sale Promo.
- Own the token-gated actions layer and billing integration.
- Build against the Meta Business API for campaign creation, ad set configuration, and performance reporting.
- Design APIs on Cloudflare Workers and ship typed clients for the frontend.
- Improve onboarding to help new users achieve the "aha moment" in under 5 minutes.
- Partner with the generative ML team to productize new models as they become available.
Requirements
Must Have
- 5+ years of experience building production web apps end to end.
- Strong proficiency in TypeScript and React 19 patterns.
- Comfort with server-side technologies such as Cloudflare Workers, Node, or similar.
- Experience with modern data layers such as D1, Postgres, or equivalent.
- Ability to ship fast and ship right.
Nice to Have
- Experience with Meta Business API, Marketing API, or Graph API.
- Familiarity with Zustand, TanStack Query, Radix UI, and Tailwind v4.
- Experience with LLM tool-use or agentic workflows.
- Billing integrations with Stripe.
Qualifications
Education
- BSc in Computer Science or equivalent experience.
Experience
- 5+ years
Skills
- TypeScript, React 19, Cloudflare Workers, D1, R2, Tailwind v4, Meta Business API, Stripe, Zustand, TanStack Query
We Offer
- Competitive salary in EUR.
- Equity participation in the SaaS spinout.
- AI-augmented workflow with tools like Claude Code and Cursor.
- Real ownership of your features, shipping to real customers within days.
- Remote-first with flexible hours.
- Home office and hardware budget.
About the Company
At Coinis, we expect our engineers to use AI tools daily. We hire engineers who multiply themselves with AI, not those who resist it.
Work Environment
Our office is a cozy, quiet space with good coffee. We offer various amenities such as a lounge, whiteboard talk areas, phone booths, and more. We welcome dogs and have a flexible work schedule to accommodate EU timezones.
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Coinis is a successful ad tech company that puts emphasis primarily on personal development and career challenges with innovative projects.The collective consists of hot-blooded, passionate, and hard-powered professionals who indulge in every task with devotion and enthusiasm.