Senior Fullstack Engineer - Core & Ad Platforms

Responsibilities

Own a blended scope across core HellYeah product engineering and ad-platform integrations. Build and maintain fullstack product features, backend business logic, and frontend flows while also driving Meta / TikTok connector work, server-side postbacks, and ad-account provisioning automation. Write technical designs, lead discussions, and execute independently across both product and integration surfaces.

Must Have

1. Strong TypeScript production experience building fullstack systems.
2. Experience with React / Next.js on the frontend and Node.js services on the backend.
3. Experience integrating complex third-party APIs, including OAuth, webhooks, rate limiting, and event-driven workflows.
4. Experience with Postgres / Supabase / Firebase, Docker, and production-quality engineering practices.
5. Ability to own both core product engineering and ad-platform integration work in a fast-moving environment.

Nice to have

1. Meta Marketing API or TikTok Marketing API experience.
2. Ad-tech / growth-tech or attribution background.
3. Conversions API / server-side postback experience.
4. Python or Go.
5. Kubernetes / AWS / CI-CD / observability.
6. AI-first development workflow and ability to ship quickly with modern coding tools.