Staff Software Engineer

Welcome! Super excited you dropped by 🥳
Let's redefine cyber security expertise standards and connect business - community through highly engaging hacking experiences. (Find out more insights about Hack The Box culture in our career site).

✨The core mission of the Staff Software Engineer:
The Staff Software Engineer will be the newest addition to the Artificial Intelligence team, working on the latest HTB product, AI Range. 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. It is expected to follow the best practices in software development, while familiarizing with HTB practices.

🏢 Location &  Work Mode:

• 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 fellowship you’ll be joining:

The Staff Software Engineer will join our AI team, the driving force behind Hack The Box's AI-powered products and innovation. You'll collaborate closely with AI Engineers, Data Engineers, and cross-functional partners across SRE and Product.

Our wider AI organization spans Analytics, Data Engineering, and AI teams, and has already delivered industry-first innovations, including the cybersecurity sector's first MCP server and our AI Range platform for training autonomous agents. 
Reporting directly to the VP of Artificial Intelligence, you will have a direct impact on the back end code of our newest product, AI Range.

⚔️ Technology tools & weapons you’ll be using:

• Python & Elixir, Phoenix, FastAPI, RestAPI, Kafka, PostgreSQL, Elasticsearch, Kubernetes, Terraform

📚 Interesting resources you should check:

• HTB launches the world’s first AI Range
• Introducing the MCP Server for CTF competitions at Hack The Box

🚀 The adventures that await you after becoming Staff Software Engineer at Hack The Box:

• Design, develop, maintain, and evolve backend services for Range, 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, 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

🏆 Skills, knowledge, and experience points required to unlock the role of Staff Software Engineer at Hack The Box:

• 5+ years of professional software engineering experience, with a strong focus on backend systems and production ownership
• Strong proficiency in Python and/or Elixir, with hands-on experience building services using FastAPI and/or Phoenix
• Proven experience designing and operating backend systems, including REST APIs, PostgreSQL, 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

Bonus points:

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

🕹️ What your Hack The Box adventure will have in store:

• 🎯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 organization 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!

💰We have also other benefits that will keep you happy:

• Private health care
• Paid paternity leave
• 25 annual leave days
• Free lunch & snacks at the office
• Access to on-site gym and a variety of group activities including Cross Training, Pilates, Boxing and Climbing
• 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 can learn how to hack 😉
• State-of-the-art equipment (mac, iPhone, and mobile plan)
• Flexible WFH (Hybrid Model) - Fully Remote is also an option if you're not an Attica resident
• Annual childcare allowance to support daycare expenses for parents

Our benefits package is designed to provide strong support to our team, but it may vary depending on location and type of employment (e.g., UK, US, Greece, Australia, or engagement through an Employer of Record or contract).

🗺️ The Quest of Becoming Hack The Box’s Staff Software Engineer:

• Level 1: To complete level one’s objective, submit your application. 
• Level 2: Meet the Talent Acquisition team. Level’s objective: highlight your past achievements, ambitions, and values.
• Level 3: Meet the hiring team. Level’s objective: connect with the hiring team and share with them your achievements. 
• Level 4: Conduct two technical discussions with the hiring team that aligns with day-to-day job-related tasks and responsibilities
• Level 5: You've officially received an offer from HTB! To complete the last level and the Quest, all you need to do is accept the offer. 
• Quest complete. Congratulations, you’re officially one of us 🥳🎉🎇Your next quest: complete the onboarding.

Hack Your Career, Today. Join us in this epic adventure of cybersecurity at Hack The Box! 🚀🔒💻

At Hack The Box, we are on a quest to find the most exceptional and enthusiastic talent to join our team. Whether or not you consider yourself a gamer, we value what makes you unique and want to know more about you. This job post provides just a glimpse of the incredible gamified experience our business and consumer customers enjoy through our platforms. So, if you're ready to embark on a journey of growth and adventure, we can't wait to meet you!

ABOUT HTB:

Hack The Box (HTB) is the cybersecurity upskilling and talent development platform trusted by individuals, enterprises, and government agencies to sharpen offensive and defensive capabilities. Powered by a vibrant global community and hands‑on, real‑world training, HTB helps security teams practice like attackers, validate skills continuously, and move faster against emerging threats. We’re scaling rapidly across the enterprise market—especially in Financial Services, MSSPs, and Technology—and we’re just getting started.

If you’re excited to turn technical depth into crisp stories, to shape a category, and to fuel measurable growth in a fast, collaborative environment—come build with us.

🚨 Exciting News:

• Get the most important updates on HTB’s latest year!
• We are super proud to share that Hack The Box’s entities in the US, the UK & Greece have been certified as a Great Place to Work (2024-2026).
• Furthermore, Hack The Box’s Greek entity has been listed by the Great Place to Work Institute in the Top 5 of Best Workplaces for three consecutive years (4nd, 2nd, 3rd)
• On the European level, the Greek entity has been listed as Best Workplace in Europe for three consecutive years
• Take a sneak peek at how it is to be part of HTB and our 2023 Global Retreat. Get more insights about our HTB culture and employee experience by visiting the “about us” section of our site, our career site, and Glassdoor.

At Hack The Box, we are committed to fostering a diverse, inclusive, and equitable workplace. We believe that diversity enriches our performance, services, and the communities we serve. As such, we ensure that all job applications are considered solely based on merit, skills, and qualifications. We do not discriminate on grounds of race, color, religion, gender, gender identity or expression, sexual orientation, national origin, genetics, disability, age, or veteran status. We are dedicated to providing a fair and respectful work environment that reflects our values.