Senior Backend Engineer — Remote & Scalable Systems

The Flex; Gijón; Remote; EUR 65,000 - 90,000; Full time

Job summary

The Flex is seeking a Senior Software Engineer (Backend) to join a fully remote engineering team. You will design, develop, and maintain scalable backend systems powering innovative products, collaborating with engineers and product teams across multiple projects.

Occasional travel for team meetups may be required, with primary remote operation and flexibility for regions like Córdoba. We are looking for a proactive problem-solver with strong backend expertise and a track record of delivering

Qualifications

• Bachelor's or master's degree in Computer Science, Engineering, or related field, or equivalent practical experience.
• 5+ years of professional experience in backend software development.
• Proficiency in backend technologies and best practices.

Responsibilities

• Design, develop, test, deploy, maintain, and improve backend software.
• Manage individual project priorities, deadlines, and deliverables.
• Write clean, efficient, and well-documented code.
• Collaborate with front-end developers, product managers, and designers to deliver features.
• Participate in code reviews to ensure code quality and share knowledge.
• Troubleshoot and debug production issues.
• Contribute to architectural discussions and technology decisions.
• Mentor junior engineers and share best practices.
• Optimize application performance and scalability.

Skills

Backend development

API design

Code optimization

Mentoring

Education

Bachelor's/Master's in CS/Engineering

Job description

The Flex is seeking a Senior Software Engineer (Backend) to join a fully remote engineering team. You will design, develop, and maintain scalable backend systems powering innovative products, collaborating with engineers and product teams across multiple projects.

Occasional travel for team meetups may be required, with primary remote operation and flexibility for regions like Córdoba. We are looking for a proactive problem-solver with strong backend expertise and a track record of delivering