Full Stack Developer (m/f/d) – AI Agent Automation Platform

• You create features end-to-end: Next.js (React, App Router) and Tailwind v4 on the frontend, Server Actions, Route Handler and Supabase (Postgres, Auth, Realtime) on the backend

• You work on an agent launch system: system prompts, tools, model selection, and execution in an isolated environment (sandbox)

• You write tests for policy logic, security, and prompts

• You connect external APIs and maintain their stability

• You are responsible for the data model, migrations, and client separation (Row Level Security) in Supabase

• You create tracking and analytics logic

• You have strong TypeScript knowledge and practical experience with Next.js or a similar React framework

• You are familiar with relational databases, ideally Postgres/Supabase, and have dealt with authentication, permissions, or multi-tenant structures

• You have already worked with LLM APIs (e.g., Anthropic, OpenAI)

• You think about security: validate inputs, manage secrets carefully, treat external data as data, not instructions

• You have a good sense of UI/UX

• You prefer working in the office rather than from home.

• You speak German at C2 level.

A typical workday

With us, you will accompany clients from onboarding to ongoing support of their digital marketing campaigns, working closely with clients and our team. You will work on automation, API connections, and agent AI workflows that take over repetitive tasks and link our systems. With increasing experience, you will also independently implement new features for our Marketing Console. This also includes regular testing and quality assurance cycles, bug fixing, and continuous improvement of the application based on customer feedback.