Backend Developer (Python & AI & GenAI)

Backend Engineer | Python • FastAPI • GraphQL • AI/LLM Integrations | Azure • Docker • SQL

B2B Contract

Rate: 170 PLN net+VAT/h

About / Summary

Backend Engineer with 3–5 years of hands-on experience building scalable backend systems and AI-powered applications. Specialized in Python, FastAPI, GraphQL (Strawberry), relational databases, and modern cloud-native development practices.

Experienced in integrating LLM APIs such as OpenAI and Anthropic into production-ready services, designing high-performance APIs, optimizing SQL queries, and developing secure, scalable architectures running in Azure environments.

Experience:

• Developed scalable backend services using Python and FastAPI for AI-driven applications.
• Integrated OpenAI and Anthropic APIs into production backend systems.
• Designed and maintained GraphQL APIs using Strawberry GraphQL.
• Built and optimized relational database schemas and SQL queries.
• Managed database migrations and ensured data consistency and integrity.
• Containerized applications using Docker and supported CI/CD pipelines.
• Collaborated with DevOps/MLOps and Data Science teams in Azure-based environments.
• Monitored application performance and optimized scalability, latency, and operational costs.
• Troubleshot production issues and improved system observability.

Strong background in:

• Python & FastAPI
• GraphQL / Strawberry GraphQL
• SQL & relational database design
• SQLAlchemy ORM
• Docker & Git
• CI/CD workflows
• AI/LLM integrations
• Performance optimization & observability

Additionally familiar with:

• Azure cloud services
• Vector Databases
• RAG (Retrieval-Augmented Generation)
• MCP (Model Context Protocol)
• AI/GenAI product development

Comfortable working in cross-functional teams alongside DevOps/MLOps engineers and data scientists to deliver modern AI-driven solutions.