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# Senior Software Engineer - Data

- **Company:** Factorial Hr
- **Location:** Barcelona, Spain
- **Contract:** Permanent contract
- **Skills:** Application Programming Interfaces (APIs), User Authentication, Software as a Service, Continuous Integration, Performance Tuning, ReactJS, Backend, Front End Software Development, Web Api
- **Published:** September 14, 2026
- **Apply:** https://www.buscojobs.com.es/senior-software-engineer-data-en-barcelona-ID-370932122

## About the Role

Compensaciones / Beneficios * Design and develop customer-facing portals for subscriptions, billing, and account management * Build robust backend services and APIs powering portal workflows * Integrate internal systems and external providers (CRM, billing, authentication, product APIs) * Collaborate with Product, Design, Finance, Sales, and Support to translate business needs into scalable user experiences * Own features end-to-end including architecture, production monitoring, and performance optimization * Follow GitOps mindset with CI/CD practices and rapid iteration * Contribute to architectural decisions and RFCs to improve the platform over time Responsabilidades * 5+ years of experience as a Software Engineer (backend or full-stack) * Experience building customer-facing platforms or SaaS with usability and reliability focus * Experience designing and maintaining production-grade APIs and backend services * Experience with frontend frameworks (React or similar) *
Experience integrating multiple systems and services (internal platforms, third-party APIs, auth systems) * Strong ownership mindset and end-to-end delivery * Clear communication and collaboration with Product, Design, and non-technical stakeholders * English proficiency and ability to work with distributed teams Requisitos principales * high growth environment * private health insurance * Wellhub gym and activities * Cobee expense management * language classes * office breakfast and organic fruit

## Description

Experteer Overview As a Fullstack engineer on the Portals team, you will build customer-facing portals that enable secure, scalable self-service experiences.You'll integrate internal systems (billing, CRM, product services) with external users, driving smooth customer journeys and reducing friction.You'll own features end-to-end-from architecture to production-while collaborating with Product, Design, Finance, Sales, and Support.This role offers impact on growth, usability, and reliability at a fast?growing SaaS company.Compensaciones / Beneficios * Design and develop customer-facing portals for subscriptions, billing, and account management * Build robust backend services and APIs powering portal workflows * Integrate internal systems and external providers (CRM, billing, authentication, product APIs) * Collaborate with Product, Design, Finance, Sales, and Support to translate business needs into scalable user experiences * Own features end-to-end including architecture, production monitoring, and performance optimization * Follow GitOps mindset with CI/CD practices and rapid iteration * Contribute to architectural decisions and RFCs to improve the platform over time Responsabilidades * 5+ years of experience as a Software Engineer (backend or full-stack) * Experience building customer-facing platforms or SaaS with usability and reliability focus * Experience designing and maintaining production-grade APIs and backend services * Experience with frontend frameworks (React or similar) * Experience integrating multiple systems and services (internal platforms, third-party APIs, auth systems) * Strong ownership mindset and end-to-end delivery * Clear communication and collaboration with Product, Design, and non-technical stakeholders * English proficiency and ability to work with distributed teams Requisitos principales * high growth environment * private health insurance * Wellhub gym and activities * Cobee expense management * language classes * office breakfast and organic fruit


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