Fullstack Engineer (Python, React)

The role

We’re looking for a Fullstack Engineer with a strong backend foundation in Python and FastAPI, and solid experience in React on the frontend side. You’ll take work on backend-first features, shape our service architecture, and contribute to high-quality product delivery. While frontend is part of the role, the majority of your work will focus on API development, integrations, and scalable backend solutions.

What you’ll do

• Design, build, and maintain backend services using Python and FastAPI

• Create and evolve public and internal REST APIs

• Implement supporting features using React (about 15-20% of tasks)

• Own features end-to-end - from technical design to production release

• Collaborate closely with product, design, and other engineers to solve real user needs

• Ensure scalability, reliability, and performance of backend components

• Contribute to architecture decisions and improvements in development tooling

• Maintain high code quality through testing, code reviews, and best practices

Requirements

• 3+ years of experience in backend or fullstack development with Python

• Professional experience with FastAPI 

• Solid experience building UI in React

• Good understanding of relational databases and query optimization (e.g., PostgreSQL)

• Experience designing scalable APIs and backend architectures

• Ability to deliver features independently and collaboratively in cross-functional teams

• Familiarity with CI/CD workflows and containerized environments (e.g., Docker)

• Comfortable working in a bilingual environment (Polish B2+, English B2+)

Nice to have

• Experience with microservices

• Knowledge of AWS or other cloud platforms

• Familiarity with authentication, authorization, and security best practices

Please note: this is a 3-month contract with the possibility of extension.