Senior Backend Python Engineer

Senior Backend Engineer Location : About the Company

Our client is a fast-growing cybersecurity company based in Barcelona, redefining digital security standards in the B2G (Business to Government) space. They are on a mission to address some of the most complex and sophisticated challenges in the cybersecurity landscape.

At its core, the company is driven by a strong purpose : creating technology that contributes to a safer world. We are looking to hire a Senior Backend Engineer, a true coding Superstar, to join their growing engineering team. The selected candidate will play a key role in designing, developing, and maintaining scalable backend systems that power their cybersecurity platform.

This is a highly technical position that combines ownership, impact, and the opportunity to contribute directly to the company's mission of advancing cybersecurity innovation.

Design, develop, and maintain backend services using Python and C

Build and optimize microservices-based architectures ensuring scalability, performance, and security

Work with SQL and NoSQL databases (e.g. PostgreSQL, MongoDB)

Develop and deploy containerized applications using Docker

Debug, profile, and improve existing systems to ensure stability and optimal performance

Collaborate with cross-functional teams (Frontend, DevOps, Research, and Product) to deliver end-to-end solutions

Ensure code quality through testing, code reviews, and adherence to engineering best practices

Take ownership of the full development lifecycle, from requirements gathering to deployment and monitoring

5+ years of professional experience in backend development, with a strong record of building scalable systems

~ Advanced proficiency in Python (core backend language)

~ Hands-on experience with Docker and containerized environments

~ Proficiency in both SQL and NoSQL databases

~ Familiarity with DevOps practices and on-premise infrastructure is a plus

~ Good understanding of Linux-based systems

~ Ability to work autonomously, take ownership, and deliver high-quality solutions

~ Excellent communication skills and fluency in English (written and spoken)

~ Our client offers a people-first environment within an ambitious and fast-growing start-up, providing strong opportunities for technical growth and real impact in the cybersecurity space.

Private health insurance

~ Flexible working hours

~100% on-site role in their beautiful office (Barcelona), due to security reasons

~ Fully stocked kitchen (coffee, organic fruit, snacks, beverages)

~ If you're looking for a role where your work has real impact and you want to be part of a cutting-edge cybersecurity project, this is the perfect opportunity.