Über die Stelle
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, 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.
What we offer:
- 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.
Build something meaningful. Protect thousands of businesses. Let’s redefine cybersecurity together.
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