We’re hiring Fullstack engineer with a product mindset who loves building scalable systems and polished user experiences.

We’re creating a platform where customers can manage subscriptions, billing, invoices, payment methods, and usage insights through seamless self‑service experiences built on a modular, scalable architecture with best‑in‑class service design.

What’s the mission?
- Factorial is building a world‑class platform to support customers and partners interact with our products, manage their accounts, and grow with us.
- As a Fullstack engineer in the Portals team, you’ll build and evolve customer facing portals that enable secure, intuitive, and scalable self‑service experiences.
- You’ll design and integrate systems that connect internal platforms—billing, CRM, product services, and support—with external users, ensuring reliable access to key workflows across the customer lifecycle.
- Your work will directly impact how customers and partners interact with Factorial, improving transparency, reducing operational friction,



and enabling scalable growth through self‑service.

The role
- You’ll be part of a fast‑growing Engineering team of 250+ product developers, building high‑impact experiences that directly affect customer satisfaction, partner collaboration, and operational efficiency.
- You will design and develop customer‑facing portals, enabling users to manage subscriptions, access services, review account information, and interact with Factorial’s platform.
- You’ll collaborate closely with Product, Design, Finance, Sales, and Support teams to translate business needs into intuitive, scalable, and secure user experiences.
- You’ll build robust backend services and APIs that power portal workflows while maintaining clean integrations with internal systems such as CRM, billing, and product platforms.
- You’ll take ownership of features end‑to‑end—from architecture and implementation to production monitoring, performance optimization, and continuous imp

📌 Senior Software Engineer (Barcelona)
🏢 Factorial
📍 Barcelona