Senior Backend Engineer (Python)

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.