Senior Python Developer Maritime / Logistics (Ukrainian+English)

Upvanta is an international company delivering modern backend systems, including solutions for the maritime industry such as ships, ports, and maritime logistics.

• Minimum 3 years of commercial experience as a software developer.
• Participation in at least 3 international projects.
• Participation in at least 2 maritime-related projects (e.g., ships, harbors, port systems, maritime logistics).
• Ukrainian language proficiency at B2 level or higher.
• Strong knowledge of Python 3.11+ / 3.12+.
• Hands-on experience with FastAPI.
• Good knowledge and practical experience with SQLAlchemy 2.0, asyncpg, Alembic.
• Very good knowledge of PostgreSQL, including ACID transactions, indexing and query optimization, database migrations, table partitioning, and read replicas.
• Experience in building and maintaining REST APIs and OpenAPI documentation.
• Experience with system integrations: SOAP/XML and REST/JSON.
• Practical experience with asynchronous programming and handling multi-step workflows.
• Knowledge of security mechanisms and best practices: OAuth 2.0, PKCE, JWT, RBAC, TLS, data validation, and secure API design.
• Experience with testing and code quality tools: pytest, mypy, flake8.

• Design, develop, and maintain backend services using Python and FastAPI.
• Build and optimize PostgreSQL-based solutions with a focus on performance and scalability.
• Implement and maintain integrations with external systems via SOAP and REST APIs.
• Develop asynchronous processing logic and multi-step workflows.
• Ensure application security using modern authentication and authorization standards.
• Write automated tests and maintain high code quality standards.
• Participate in technical analysis, code reviews, and collaboration with international teams.