Elixir Engineer in Cybersecurity

Hack The Box builds a platform that trains the world's cyber workforce and aims to raise cyber resilience so organizations can stay ahead of emerging threats.

• Design and build production Phoenix applications, including REST APIs, LiveView UIs, and real-time features using PubSub and Channels
• Model and evolve data with Ecto and PostgreSQL, writing performant queries and safe, zero-downtime migrations
• Build fault-tolerant systems with OTP, including supervision trees, GenServers, and distributed BEAM patterns
• Own background processing and scheduled workloads with Oban, with observability through Telemetry and metrics
• Ship secure-by-default code, including authentication and authorization patterns, least-privilege data access, and input hardening
• Deploy and operate services on Kubernetes/GCP, contributing to CI/CD pipelines and release quality
• Mentor engineers and contribute to technical leadership through code reviews, design sessions, and coding standards
• Document decisions and communicate clearly in a remote-first environment, contributing to thoughtful async collaboration

• 5+ Years of professional backend or full-stack development, including 3+ years shipping production Elixir/Phoenix
• Strong grasp of OTP and the BEAM, including processes, supervision, GenServer/GenStage, and when not to use them
• Hands-on experience building interactive UIs with Phoenix LiveView, including components, streams, and JS hooks
• Deep Ecto and PostgreSQL knowledge, including schema design, query optimization, indexing, and migrations
• Experience with background job systems and event-driven architectures
• Solid testing discipline with ExUnit; comfortable with property-based and integration testing
• Familiarity with containerized deployment and CI/CD best practices
• Security-minded engineering, including OWASP fundamentals, auth patterns, and secure handling of user data
• Excellent written and verbal communication, especially in remote/async environments, and a bias toward documenting architecture and decisions
• Будет плюсом: Oban experience

• Remote work is available across Europe, or candidates can relocate to Athens with relocation support
• Candidates hired in Greece can be based anywhere. Those within 55 km of the Athens office follow a hybrid model; candidates beyond that radius can work fully remotely
• Relocation bonus of 10% of annual salary
• 50% Tax reduction on income as part of relocation
• Accommodation support during the first few weeks after relocation
• 25 Annual leave days
• Paid parental leave
• Home Office Allowance
• Dedicated budget for training and professional development, and conference participation
• State-of-the-art equipment
• Full access to Hack The Box lab offerings
• Flexible working hours
• Benefits may vary by location and type of employment, including the UK, US, Greece, and Australia, or engagement through an Employer of Record or contract