Senior Fullstack Engineer (d/w/m)

November 15, 2026

Senior

Berlin, Germany

Keep in mind

Original vacancy is in German
You will likely need German for the job. The employer can confirm

Description

The role develops web applications that help public authorities and businesses work with machine-readable legal rules, spanning React frontends and NestJS backends. It combines product-focused engineering with architecture, database work, testing, and CI/CD contributions.

Gender markers in the title: (d/w/m)

In accordance with European anti-discrimination legislation, this job is open to all candidates

Ddiverse

Wfemale

Mmale

Responsibilities

Build web applications for public authorities and businesses, from React frontend through NestJS backend, collaborating with UX and Product Management
Develop performant, maintainable frontend components using React, Panda CSS, and TanStack Router in collaboration with UX/UI and Product Management
Implement and maintain scalable NestJS REST backends with clean architectural principles and clear API design
Own PostgreSQL database design, query optimization, and migrations; integrate Keycloak authentication and securely connect the Rulemapping Automation Backend
Use AI tools such as Claude Code for code generation, refactoring, and tests; maintain quality through ESLint, Prettier, Vitest, Jest, Playwright, and structured code reviews
Contribute to architecture decisions, team knowledge sharing, and CI/CD pipelines; evaluate technologies to keep the platform current and scalable

Requirements

Several years of experience building modern fullstack web applications, demonstrated through practical work rather than requiring a degree
Deep understanding of TypeScript, React, and PostgreSQL; Python knowledge is an advantage
Confident use of state management, APIs, Keycloak authentication, and frontend performance optimization
Strong understanding of software architectures, data flows, and API design
Experience with Vite and common testing and code-quality tools, plus basic understanding of CI/CD and cloud environments
Ability to work independently, think pragmatically, write maintainable code, and actively follow technology trends