Senior Django Engineer

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! 🚀🔒💻

We are on the lookout for our next backend engineer in LetsDefend team. Let’s Defend is a cutting-edge cybersecurity training company dedicated to empowering blue-team professionals by simulating a real Security Operations Center (SOC). It has a community of over 320,000 members across 150+ countries fosters peer learning and collaboration.

Hack The Box and LetsDefend join forces to create the world’s largest collaborative cybersecurity platform with hands-on labs, SOC simulations, and a unified upskilling experience.

This role will focus on enhancing backend performance and scalability, strengthening code quality and reliability, and leading architectural direction across teams. The software engineer will play a key role in improving system efficiency, reducing issues, and fostering alignment with frontend, mobile, and DevOps counterparts. Additionally, they will own and deliver impactful backend features that support major product goals and contribute to the platform’s long-term growth.

🏢 Location &  Work Mode:

• Options: Turkiye or Greece
• Fully Remote - 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 new joiner will be part of a lean software engineering team composed of three members: one Senior Backend Developer, one Mid-Level Frontend Developer, and one Mobile Developer. In this role, they will collaborate closely not only with their immediate teammates, but also with key stakeholders across the organization, including the Content Engineering team, Sales team, Infrastructure, and the broader Engineering team, all of whom play a critical role in supporting the product and its customers. This position will report directly to the Sr. Director of Engineering.

• Django Framework (Python language)
• Docker
• Apache Kafka
• Redis
• Git

• Take a look at LetsDefend Website
• Hack The Box + LetsDefend: Shaping the future of community-led cyber readiness

• Optimize backend performance by improving API responsiveness, refining database queries, and enhancing caching strategies.
• Design scalable backend architectures and influence long-term technical direction across multiple products and services.
• Implement high-quality, maintainable code with strong test coverage and adherence to best practices.
• Refactor legacy components into clean, modular, and future-ready services that accelerate development.
• Collaborate closely with frontend, mobile, DevOps, and product teams to ensure smooth execution of cross-functional projects.
• Lead technical discussions, produce clear design documents, and guide the team on architectural patterns.
• Troubleshoot production issues rapidly and improve system reliability through monitoring, logging, and error reduction.
• Deliver high-impact backend features that directly support product growth, user engagement, and business goals

• Expert-level proficiency in Django & Django REST Framework, including ORM optimization, class-based views, and advanced API design.
• Hands-on experience with asynchronous task processing, ideally Celery + Redis/RabbitMQ, and deep understanding of reliability patterns.
• Ability to design scalable backend architectures, including caching layers, service boundaries, and performance bottleneck prevention.
• Solid understanding of backend security practices, including authentication, authorization, rate-limiting, and secure data handling.
• Proven track record of owning and delivering complex backend features, including writing technical designs and mentoring other engineers.
• Good knowledge of English language (verbal and written)

Bonus points: 

• Experience with AWS or other cloud platforms
• Knowledge of Docker or containerization
• Exposure to event streaming technologies such as Apache Kafka

• 🎯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!

• 25 annual leave days
• Paid paternity leave
• 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)

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, Greece, or engagement through an Employer

• 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: Meet the hiring team, once again, to explore your leadership mindset and values alignment with HTB.
• Level 5: Congratulations! Not many reach this level 💪. Level’s objective: have a constructive, final conversation with senior leadership to explore the role and your future at HTB. 
• Level 6: 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! 🚀🔒💻

Hack The Box is the leading cybersecurity readiness and upskilling platform, trusted by enterprises, government organizations, and MSSPs to build cyber resilience at scale. Through AI-enhanced intelligence, gamified labs, live-fire simulations, and the power of one of the world’s largest cybersecurity communities, Hack The Box helps teams master offensive and defensive skills in real-world scenarios. Founded in 2017, Hack The Box has grown its global community of over 4 million members, helping organizations validate resilience, mitigate breach risk, and develop cyber talent. For more information, visit hackthebox.com 

Rapidly growing its international footprint and reach, Hack The Box is headquartered in the UK, with additional offices in the US, Australia, and Greece.

🚨 News & Resources: 

• Get the most important updates on HTB’s latest year!
• We’re incredibly proud to share that our headquarters in the UK, along with our entities in Greece and the US, have been certified as a Great Place to Work for three consecutive years (2023 - 2025). 
• In addition, our Greek entity has been recognized among the Best Workplaces in Greece (4th, 2nd, 3rd) and Europe (7th, 10th, 73rd) during this period — a testament to our strong culture and commitment to creating an exceptional employee experience!

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.