Python Developer

UnderDefense is looking for a proactive Python Developer to join their product team building a cloud-native cybersecurity platform for automating security incident response. The role involves designing scalable services, working with Python, AWS, FastAPI, and LLM/AI stack.

• Design and build scalable, production-quality Python services
• Write clean, testable code and contribute to a strong TDD culture
• Participate in daily code reviews and agile rituals
• Translate business requirements into architectural solutions and working software
• Ensure high code quality with unit/integration testing
• Collaborate with DevOps to manage scalable cloud infrastructure
• Contribute to architectural decisions and tool selection
• Write and maintain technical documentation

• Python (asyncio): 3+ years of hands-on commercial experience
• PostgreSQL, SQLModel/SQLAlchemy, Alembic: 1+ year
• AWS (SQS, DynamoDB, S3, ECS/Fargate, Lambda, Cognito): 2+ years, including boto3/aioboto3
• FastAPI: 2+ years designing and building REST APIs
• Testing (pytest, pytest-asyncio): 2+ years writing solid unit and integration tests
• Docker, docker-compose: 2+ years
• Event-driven microservices (SQS, NATS): 1+ year designing and building distributed systems
• LLM/AI stack (LangChain, Langfuse, AWS Bedrock/AgentCore, Strands Agents, LiteLLM, MCP): 1+ year building LLM-based pipelines or agents
• CI/CD (GitLab CI/GitHub Actions): 1+ year
• Vector search (Weaviate/Chroma): hands-on experience
• Observability (Sentry, OpenTelemetry): practical experience
• English: Intermediate+, with strong communication skills

• Outstanding product team; work in a global IT/Cybersecurity company, a pure Ukrainian Startup success story
• Direct impact on product evolution
• Decent base Compensation fixed in USD
• Funny celebrations, team outings, and unforgettable corporate events
• Compensation for sick leaves and regular vacations
• Comfortable office or possibility to work remotely
• Flexible working schedule
• English classes compensation
• Internal Medical coverage
• The ability to attend conferences, webinars, and other events that will enhance your professional skills
• Regular education and self-development on internal courses and seminars, office library, direct access to decision-makers