Hack The Box is hiring a Senior Backend Developer (Python). Fully remote across Europe or relocate to Athens Tech Hub (Greece) with support; hybrid (2 days office, 3 remote) for those within 55km of Athens.

What you will do:

  • Design, develop, maintain, and evolve backend services with ownership of systems and new features.
  • Lead greenfield projects and build scalable backend systems from scratch.
  • Own backend architecture and technical design for long-term growth.
  • Develop REST APIs using Django/FastAPI and manage data with PostgreSQL/Elasticsearch.
  • Collaborate with Product Managers on requirements and integrations.
  • Implement CI/CD, monitor systems, tune performance, and support production.

Requirements:

  • 5+ years professional backend experience with production ownership.
  • Strong Python proficiency, hands-on FastAPI experience.
  • Experience with REST APIs, PostgreSQL, Elasticsearch, Kafka/event-driven systems.
  • Deep knowledge of backend architecture, scalability, and distributed systems.
  • Production CI/CD, Kubernetes, Terraform experience.

Nice to have:

  • Django experience.
  • ClickHouse.
  • MCP/Fastmcp familiarity.
  • Exposure to AI technologies.
  • High-growth/startup experience.

Culture & Benefits:

  • Private health care, paid paternity leave, 25 annual leave days.
  • Free lunch/snacks, €120 Ticket Restaurant, training budget, conferences.
  • Full HTB lab access, state-of-the-art equipment (Mac, iPhone, mobile plan).
  • Flexible WFH/hybrid, one month work from anywhere, annual childcare allowance.
  • On-site gym and group activities; supportive environment with growth and global meet-ups.