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Fullstack Entwickler TypeScript – Node.js / Angular, KI-Integration (m/w/d)

Rockstardevelopers GmbH
Contract type
Ongoing
Work mode
Hybrid · Mannheim, Germany · Stuttgart, Germany · München, Germany · Frankfurt am Main, Germany
Experience
Mid-level · 3+ years

Job description

Senior fullstack TypeScript developer working embedded in client teams on enterprise and public-sector projects, building Node.js/Angular applications and integrating language models.

At a glance

Employment
Full-time · Employee (employment agreement)
Work mode
Hybrid · Mannheim, Germany · Stuttgart, Germany · München, Germany · Frankfurt am Main, Germany
Languages
German – C1

What you'll do

  • Fullstack development with TypeScript: Node.js backend, Angular frontend
  • Integrate language models into business applications: RAG, tool calling, agents running in production
  • Help shape architecture, not just implement it
  • Generate, review and refactor code with Claude Code, Copilot or Cursor
  • Code reviews and technical mentoring in the team
  • Coordinate with Product Owners, UX and DevOps

What we're looking for

  • Senior level; able to deliver from day one and work independently
  • TypeScript on both sides, at least three years in projects
  • Node.js backend (NestJS or Express), REST and API design, PostgreSQL
  • Angular (React or Vue developers willing to learn Angular may still apply)
  • At least one application where you integrated a language model: RAG, tool calling, MCP server or agents
  • Tests are part of the definition of done
  • CI/CD (GitLab CI, GitHub Actions), Git, Docker, agile working
  • German at C1 level or better; project language is German
  • Must be able to work productively with AI tools like Claude Code, Copilot, Cursor

Nice to have

  • Kubernetes/Helm, AWS or Azure
  • Kafka or RabbitMQ, WebSockets
  • Monitoring (Grafana, Prometheus), frontend testing (Jest, Playwright, Cypress)
  • Accessibility (BITV 2.0 / WCAG AA), DevSecOps / Security by Design
  • Experience at Deutsche Bahn, public authorities or social insurance

Benefits

  • Home office, office or mix, your choice
  • MacBook (unless the client provides their own hardware)
  • Various clients, various projects
  • The founders are your direct contacts
  • Internal upskilling in AI development

How to get hired

  1. 1CV is enough, no cover letter needed
  2. 2Short video question round (2×90 seconds), then feedback within a few days

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About Rockstardevelopers GmbH

Software developer with experience from hundreds of individual projects for enterprise and mid-market clients

Founded in 2015 in Mannheim, with further offices in Stuttgart and Munich; builds custom software for enterprise and mid-market clients.

Key facts

  • 2015
  • Mannheim, Germany
  • Additional offices in Stuttgart and Munich
  • Short paths, honest feedback, no politics
  • No hierarchy levels between you and decision-makers

Partners & customers

Deutsche Bahn / DB SystelBundesagentur für ArbeitITZBund

What they value

  • Short paths, honest feedback, no political games
  • No hierarchy levels between you and decision-makers