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 improvemen

📌 Senior Software Engineer (Madrid)
🏢 Factorial
📍 Madrid