We are part of one of the largest independent and most creative digital agencies in Europe and the leading digital communications agency in Germany. The Serviceplan Group is the largest owner-led agency group in Europe with more than 30 locations and 4,200 employees worldwide.

About the Role

We’re looking for a web developer who is AI-first: someone who uses AI heavily for code generation, including agentic workflows (plan → execute → validate → refactor), and continuously improves their productivity and quality through living AI instruction docs (Markdown).

The work is focused on fast MVPs and POCs, with a dynamic delivery style (less classic sprint ceremony). The team will evolve the organization and processes later, once product direction stabilizes.

Responsibilities

• Build end-to-end web features: frontend (React/Next.js) and backend (Node.js).
• Deliver MVP/POC iterations quickly using a build–measure–learn mindset.
• Use AI extensively for:
• scaffolding, feature implementation, refactoring
• debugging and performance improvements
• test generation and documentation
• agentic execution loops (task decomposition, stepwise execution, self-checking)
• Create and maintain AI instructions in Markdown, including:
• project conventions, code style, architecture patterns
• prompt patterns, “tips & tricks”, reusable checklists
• testing guidelines and review standards
• Apply strong engineering practices:
• clean code, modular design, clear separation of concerns
• robust error handling and meaningful logging
• Write unit tests and keep high code coverage as a standard quality gate.
• Collaborate closely with developers and stakeholders; communicate trade-offs, risks, and options clearly.

Must Have

• Strong JavaScript / TypeScript skills across frontend and backend.
• Hands-on experience with:
• React (or solid experience with Vue/Angular and the ability to ramp up fast)
• Next.js (routing, SSR/SSG, common patterns)
• Node.js (APIs, integrations, validation, auth, best practices)
• Heavy AI user:
• frequent AI-assisted coding
• practical prompt engineering
• strong validation habits (tests, linting, iterative refinement)
• Comfortable working in a dynamic environment (less “classic sprint”, more iterative delivery).
• Strong fundamentals and discipline:
• best practices, maintainable code, review-friendly PRs
• unit testing and a drive for high coverage
• Solid Git workflow experience (branches, PRs, reviews).
• Flexibility and resilience: you adapt quickly, don’t get intimidated by ambiguity or change.

Nice to Have

• Experience with agentic tooling / AI automation (tool-based agents, structured coding loops).
• Knowledge of MCP (Model Context Protocol) and tool integration patterns.
• Experience with quality pipelines: CI gates, coverage thresholds, linting/formatting enforcement.
• Experience integrating AI services (SDKs, prompt management, evaluations).
• Docker familiarity

What Success Looks Like (First 4–8 Weeks)

• Deliver 1–2 working MVP/POCs with fast feedback cycles.
• Establish/adhere to a clear testing standard (unit tests + coverage).
• Create and improve a reusable set of AI instruction Markdown docs used by the team.
• Demonstrate autonomy: turn vague requirements into executable tasks and ship incrementally.

Working Style & Culture

• Pragmatic, outcome-driven, iterative.
• Comfortable with uncertainty and rapid experimentation.
• Direct communication, transparency, ownership

Tech Stack

• Frontend: React, Next.js, TypeScript
• Backend: Node.js (TypeScript)
• Testing: Jest/Vitest, React Testing Library (or equivalents)
• Tooling: Git, CI (project-dependent)
• AI: LLM tooling, prompt patterns, agentic workflows (stack-dependent)

Our offer

• Young, talented and ambitious team
• Competitive salary aligned with skills and experience
• Bonus system based on performance
• An exciting and challenging environment that promotes professional growth and career opportunities within our company
• Team building activities, personal development programs, private medical insurance, extra vacation days