OverviewIn this role you design and develop features for the full stack, spanning React UIs and Python FastAPI backends, to support core platform workflows.

You will build RESTful APIs, collaborate with Data and Security Engineering, and ensure high code quality through testing and reviews.

You participate in Agile cross-functional teams across Germany and Spain and help advance QA processes.

This is a hands-on opportunity to shape scalable software in a dynamic, international environment.

ResponsabilidadesDesign and develop features across the full stack (React UI + Python FastAPI backend)

Build and maintain RESTful APIs supporting core platform workflows

Collaborate with Data and Security Engineering teams on scalable feature delivery

Contribute to technical discussions and implementation decisions

Ensure code quality through testing and code reviews

Support QA processes across unit, integration, and end-to-end tests





Work in an Agile environment with cross-functional teams across Germany and Spain

Requisitos principales3-5 years of experience in Full Stack Software Development

Strong proficiency in React (frontend) and Python with FastAPI (backend) — must-haves

Experience with QA and test automation (unit, integration, E2E)

Experience designing and consuming RESTful APIs

Working knowledge of relational (SQL) and non-relational databases (MongoDB, Redis)

Comfortable working both independently and collaboratively

Strong English communication skills in an international environment

Experience working in Agile environments

Independent and collaborative work style

Strong communication in English

Team-oriented in international environments

React

Python with FastAPI

RESTful APIs

📌 Fullstack Developer with Frontend (Barcelona)
🏢 Schwarz Gruppe
📍 Barcelona