SENIOR BACKEND DEVELOPER (PYTHON)

Location: 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, fully remote otherwise in Greece.

Company

Hack The Box is a cybersecurity upskilling platform for individuals, enterprises, and governments, powering hands-on training and innovations like AI Range and MCP server.

What you will do

Design, develop, maintain, and evolve backend services with ownership of systems and new features.
Lead greenfield projects, building scalable backend systems from scratch.
Own backend architecture and technical design for long-term growth.
Develop REST APIs using Django/FastAPI, 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 for services
Experience with REST APIs, PostgreSQL, Elasticsearch, Kafka/event-driven systems
Deep knowledge of backend architecture, scalability, distributed systems
Production CI/CD, Kubernetes, Terraform experience

Nice to have

Django experience
ClickHouse
MCP/Fastmcp familiarity
AI technologies exposure
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, group activities (Cross Training, Pilates, Boxing, Climbing)
Supportive environment with growth, autonomy, global meet-ups

Hiring process

Submit application
Meet Talent Acquisition: discuss achievements, ambitions, values
Meet hiring team: share achievements
Complete day-to-day aligned assignment with debrief discussion
Receive and accept offer