Senior Fullstack Developer Java, (Spring)Boot, React

Project overview

For one of our end clients in Hannover, we are currently looking for a Senior Fullstack Developer (m/f/d) with Java, (Spring)Boot, and React on a freelance basis.

Responsibilities

• Conception, development, operation, and continuous improvement of web-based applications, portals, and digital platforms
• In addition to the initial implementation of new projects, this includes the functional and technical support of existing solutions, including maintenance, bug fixing, operational security, as well as the implementation of further developments and optimization measures after go-live.
• Ability to quickly learn new technologies.
• The stack is broadly structured: Gatsby with custom plugins, Lit Web Components, NestJS/Express, Fractal Pattern Library, complex SCSS design across many brands.

Requirements

Relevant project experience, especially in the following technologies:

Framework Data:

If interested, we look forward to receiving your skill profile as a PDF, including your hourly rate and availability. If it doesn't suit you at the moment, feel free to make a recommendation.

• Java | Gradle | Spring Boot
• React | TypeScript | NextJS | Vite
• SCSS | CSSSQL | NoSQL | MySQL | Postgres | MongoDB/CosmosDB | Liquibase
• Testing | JUnit 5 | Testcontainers | ArchUnit
• Git | GitFlow
• API-First with OpenAPI
• OAuth2 | OIDC
• Docker | Docker Compose
• Openness and interest in agency development would be desirable
• Location: Remote
• Start: asap (01.11.2026)
• Duration: 2 months
• Utilization: 100%
• Remote share: 100%
• Language skills: German / English
• C2 each

Project details

• Start: 2026-11
• Duration: 2 Monate
• Remote: remote
• Location: Frankfurt am Main, Deutschland, DE
• Languages: German