Senior Backend Engineer

Senior Backend Engineer

Location : Barcelona (On-site)

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. Their culture is built on collaboration, curiosity, and continuous learning, within an environment where every individual's contribution matters and makes an impact.

The Role

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.

Key Responsibilities

• 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
• Participate in system design discussions, proposing architectural improvements for scalability and maintainability
• Take ownership of the full development lifecycle, from requirements gathering to deployment and monitoring

Requirements

What's on Offer

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.

You will enjoy :

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.