Senior Python Developer

O projekcie: We are looking for someone who is passionate about building scalable, high-quality software. You’re a developer who doesn’t just write code but deeply cares about architecture, maintainability, and security. As a collaborative team player, you enjoy solving complex problems within a microservices environment and are eager to leverage modern AI-assisted development tools to stay ahead of the curve. What's more, you bring a strong business mindset and a client-oriented approach, ensuring that our technical solutions always deliver real value. Wymagania: - you have extensive commercial experience in development of web applications using Python (3.10+) - you are proficient in more than one Python framework (Django, Flask, FastAPI etc.) - you have practical experience applying Domain-Driven Design and Clean Architecture in production - you have strong async Python skills: asyncio, async/await, and async testing patterns - you write fully type-hinted Python as a matter of habit - you have production experience with MongoDB, including schema design and aggregation pipelines - you know how to effectively use relational and non-relational databases - you are able to build modern, secure and efficient APIs - you have experience with event-driven architectures and Kafka (or comparable streaming platforms) - you have a disciplined testing practice, including integration tests against real infrastructure - you are using design patterns and principles of delivering high quality, maintainable and testable code - you work agentically with AI coding assistants (Claude Code, Cursor, or similar) - you are proficient in using Docker and docker-compose - you are familiar with AWS services (EC2, ECS, SQS, S3, Lambda) - you have experience with CI/CD tools - you have practical knowledge of using Celery and message brokers (Redis, RabbitMQ) - you know security issues and know how to ensure application security (OWASP, SAST, Semgrep) what we'd like to see - familiarity with TDD / DDD approach - experience with WebSocket-based real-time systems - mentoring skills and experience in onboarding junior/mid developers - experience in leading the project as a lead developer - very good communication skills and proactive attitude in architectural discussions