Type of contract: B2B contract
Salary range: 125-160 PLN/H

What will you do? 

You will build and evolve scalable web applications in Python and work across the stack with React to deliver high-quality features. You will design data solutions, develop robust APIs, and collaborate closely with the team to ship reliably using CI/CD and automated testing, with an option to explore GenAI use cases.

Your tasks 

• Develop scalable web applications using Python with FastAPI.
• Build user-facing functionality and work across the stack with React.
• Design and optimize relational and non-relational databases including PostgreSQL and Redis.
• Implement vector search solutions using PGVector where applicable.
• Develop and maintain RESTful APIs and backend services.
• Work with AWS services to deploy and operate applications.
• Containerize services using Docker and orchestrate workloads with Kubernetes.
• Apply CI/CD practices and maintain automated test suites.
• Collaborate with engineers and stakeholders to deliver increments end to end.
• Explore or contribute to GenAI-enabled features using tools such as LangChain and OpenAI APIs

Requirements

• Strong Python engineering experience.
• Hands-on experience with FastAPI or similar Python web frameworks.
• Experience building web UIs with React.
• Solid understanding of RESTful API design and backend development.
• Practical SQL skills and experience with PostgreSQL.
• Experience with Redis or other NoSQL solutions.
• Experience with Docker and container-based development.
• Experience with Kubernetes or strong motivation to learn it quickly.
• Experience working with AWS in production or near-production environments.
• Experience with CI/CD pipelines and automated testing.
• Openness to hybrid work 4 days a month from our client office (Kraków). 

Nice to have

• Experience with PGVector or vector databases.
• Experience building GenAI applications using LangChain.
• Experience integrating or using OpenAI APIs or similar LLM providers.
• Experience with modern observability tooling such as logging metrics and tracing.
• Experience with performance tuning and scalability for high-traffic systems