Python Developer

Description du poste

UnderDefense is looking for a proactive and product-driven Python Developer to join our fast-growing product team and help build a new cybersecurity solution. This is not just a coding role – we’re looking for someone who wants to take ownership, influence decisions, and treat security as a product, not just a service.

You’ll be part of a team developing an intelligent, cloud-native platform for automating security incident response. If you care about building something meaningful, want to shape how modern cybersecurity is delivered, and grow alongside the product you’re helping create – this is your chance to make a real impact.

Our Tech Stack & Requirements

• 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.

Nice to Have

• Kubernetes (EKS) and Helm;
• Infrastructure as Code: Terraform or AWS CDK;
• Kafka or other high-throughput streaming (Kinesis);
• LLM evaluation and guardrails (Ragas, DeepEval, prompt-injection defense);

RAG optimization: hybrid search, re-ranking, pgvector;

• Background in cybersecurity or SOC tooling (SIEM, EDR, STIX).

Responsibilities

• Design and build scalable, producti

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