Senior Software Engineer - Data

Responsibilities

• Design and develop customer-facing portals that enable secure, intuitive, and scalable self-service experiences.
• Build robust backend services and APIs to power portal workflows, including subscription and billing management.
• Integrate internal platforms—such as CRM, billing, and product services—with external user interfaces.
• Collaborate closely with Product, Design, Finance, Sales, and Support teams to translate business needs into technical solutions.
• Take end-to-end ownership of features, from architectural design and implementation to production monitoring and optimization.
• Contribute to technical proposals (RFCs) and participate in architectural decision-making.

Requirements

• 5+ years of experience in software engineering, specifically focusing on backend systems or full-stack product development.
• Proven experience building customer-facing platforms or SaaS applications with a focus on usability and reliability.
• Strong expertise in designing and maintaining production-grade APIs and backend services.
• Proficiency with modern frontend frameworks such as React.
• Experience integrating multiple complex systems, including third-party APIs and authentication services.
• Strong ownership mindset with the ability to deliver features from design to production.
• Fluency in English and the ability to collaborate effectively with distributed, cross-functional teams.

Preferred Qualifications

• Experience with Ruby on Rails.
• Familiarity with GitOps-driven mindsets and CI/CD best practices.
• Experience with React Native.

Benefits

• High growth, multicultural, and friendly work environment.
• Private health insurance via Alan.
• Wellness benefits through Wellhub (gyms, pools, and classes).
• Meal and expense management via Cobee.
• Language classes and professional development opportunities.
• Office perks including breakfast, organic fruit, and free caffeine.
• Pet-friendly office environment.

About the Company

Factorial is building the leading business management software for companies of all sizes. Our platform centralizes key workflows across HR, finance, and operations, helping teams focus on growing and taking care of their people. With over 1,200 employees and 700,000+ users, we are one of Europe’s fastest-growing SaaS companies.