Full-time

Senior Software Engineer - Authentication Team

Posted by Factorial • Barcelona, Catalonia, Spain

📍 Barcelona, Catalonia 🕒 March 01, 2026

About the Role

Overview Senior Software Engineer - Authorisation Team. Factorial is looking for a Senior Software Engineer to join the CIAM (Customer Identity and Access Management) team. You will work on both sides of the stack with a focus on the backend. You will own your area end to end and contribute to a product-first company delivering the future of B2B software.Responsibilities Own and deliver on your area with a self-starter attitude; balance strategic product thinking with execution.Work on Authentication, Single Sign-On, Multi-Factor Authentication, Authorization, Permissions, and Auditing as part of the CIAM team.Collaborate with a global, English-speaking team of product engineers; participate in RFCs and team decisions.Engage in customer calls to understand pains and needs; review code daily and provide feedback on pull requests from team members, including juniors.Mentor junior engineers and share knowledge across the team; contribute to engineering quality and performance discussio...

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