Senior Elixir Engineer

Ready to embark on the quest of joining Hack The Box? Welcome! Super excited you dropped by 🥳 At the end of this journey, you'll become a proud member of Hack The Box, with the ultimate mission to raise cyber resilience, so that every organization can stay ahead of tomorrow’s threats.🚀🔒💻 ✨The core mission of the Senior Elixir Engineer: Join our fast-growing team building the platform that trains the world's cyber workforce. As a Senior Elixir Engineer, you'll own backend and full-stack feature delivery on Phoenix and LiveView — designing resilient OTP systems, clean APIs, and real-time user experiences that scale to millions of users. Our culture prizes autonomy, technical craft, and the drive to ship secure software that outsmarts attackers. 🍺 The fellowship you’ll be joining: Reporting to the VP of Artificial Intelligence, you will be part of a 7 people team. You'll collaborate with product, design, and security researchers to turn complex detection and response workflows into intuitive, intelligence-driven user experiences—while mentoring engineers and shaping our technical roadmap. 🏢 Location & Work Mode: Europe/Greece Choose between fully remote work across Europe or relocating to our Athens Tech Hub with relocation support. 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. ✈️ Relocation We offer a 10% relocation bonus on the annual salary to support your move. In addition, you would benefit from a 50% tax reduction on your income as part of the relocation. We'll support you with accommodation during the first few weeks ⚔️ Technology tools & weapons you’ll be using: Elixir / Erlang / OTP Phoenix, Phoenix LiveView, Phoenix PubSub Ecto & PostgreSQL Oban (background jobs) Tailwind CSS, LiveView JS hooks Telemetry, Prometheus, Grafana, Sentry Docker, Kubernetes, GCP 🚀 The adventures that await you after becoming Senior Elixir Engineer at Hack The Box: Design and build production Phoenix applications — REST APIs, LiveView UIs, and real-time features on 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: supervision trees, GenServers, and distributed BEAM patterns where they earn their keep. Own background processing and scheduled workloads with Oban, with proper observability via Telemetry and metrics. Ship secure-by-default code: authentication/authorization patterns, least-privilege data access, and input hardening — this is a security company. Deploy and operate services on Kubernetes/GCP, contributing to CI/CD pipelines and release quality. Mentor engineers and contribute to technical…