Senior Python Engineer

Ready to embark on the quest of joining Hack The Box?

At the end of this thrilling journey, you'll become a proud member of Hack The Box, with the ultimate mission to help redefine cybersecurity expertise. Get ready for an exciting adventure into the world of cybersecurity!

The Senior Software Engineer will be the newest addition to the software & data engineering team, working on the latest HTB products. They will be responsible for writing the back end code and executing the roadmap of the platform. They will also have the opportunity to build projects from scratch, while maintaining the existing product. They are expected to follow best practices in software development, while familiarizing with HTB practices.

• Options:
  Greece or Europe
• Fully Remote / Hybrid (2 days in the office, 3 days remote, plus one month of work from anywhere). If only in Greece:
  When hiring in Greece, we’re open to candidates from all locations. Those based within 55 km of our Athens office will follow a hybrid work model. For candidates located beyond that radius, a fully remote arrangement is available.

The Software Engineer will join our software & data engineering team, collaborating closely with AI Engineers, Data Engineers, and cross-functional partners across SRE and Product.

• Python, Django, FastAPI, RESTful, Kafka, Postgre
  
  SQL, Elasticsearch, Kubernetes, Terraform

• Design, develop, maintain, and evolve backend services, including ownership of existing systems and delivery of new features
• Lead greenfield projects, designing and building backend systems from scratch with scalability and reliability in mind
• Own backend architecture and technical design, making informed decisions to support long‑term growth and stability
• Develop and maintain REST APIs using modern frameworks like Django, FastAPI, or similar, and manage data storage and retrieval across multiple systems
• Collaborate closely with Product Managers to translate product requirements into well‑designed technical solutions, and act as the go‑to person for platform integrations
• Implement and maintain CI/CD pipelines, participate in system monitoring, performance tuning, production support, and contribute to internal documentation and knowledge sharing

• 5+ years of professional software engineering experience, with a strong focus on backend systems and production ownership
• Strong proficiency in Python with hands‑on experience building services using FastAPI
• Proven experience designing and operating backend systems, including REST APIs, Postgre
  
  SQL, Elasticsearch, and event‑driven architectures (Kafka or similar)
• Deep understanding of backend architecture, scalability, and distributed systems, with the ability to design systems end‑to‑end
• Production experience with CI/CD and cloud‑native infrastructure, including Kubernetes and Terraform

• Experience with Django and FastAPI
• Experience with Click House

• Familiarity with MCP and Fastmcp
• Exposure to AI and related technologies
• Experience in high‑growth or startup environments

• You’ll have the exhilarating opportunity to contribute to a product that is highly appreciated by users and the cybersecurity community at large.
• You’ll experience a highly supportive and caring environment, fostering growth, flexibility, and autonomy.
• You’ll embark on an exciting journey of continuous learning and problem‑solving, leveling up as our organisation grows.
• Most importantly, you’ll have a blast at HTB because fun is an essential ingredient in our recipe for success! Just wait until you see our global meet‑ups!

• Private health care
• Paid paternity leave
• 25 annual leave days
• Free lunch & snacks at the office
• 120€ Ticket Restaurant by Edenred
• Dedicated budget for training and professional development, participation in conferences
• Full access to the Hack The Box lab offerings; so you…