The Role ðWe are looking for a Senior Software Engineer to join our Data Ops team. In this role, you will lead the backend development of our internal applications, which directly impact Factorial’s sales and billing ecosystems.Your mission is to engineer highly resilient, scalable backend systems and robust cloud architectures that connect internal users, external clients, and financial workflows. You won't be managing data lakes or core data warehouses; instead, you will own the full product lifecycle from architecture to deployment. ð ️• Own the backend architecture of internal sales, invoicing, and billing applications, ensuring maximum availability, security, and performance using a modern cloud stack.

- Design and maintain robust backend workflows capable of handling critical financial data with high reliability and fault tolerance.
- Integrate integral payment platforms and APIs (such as Stripe or Adyen) to optimize our internal financial flows.
- Develop end-to-end products with strong support from our design and product teams, ensuring applications meet the needs of both internal and external users.
- Embed AI into your workflow using GitHub and modern AI tools to accelerate development and build smart agents.
- Drive agile practices within the team, participating in structured Pull Request reviews, continuous deployment, and collaborative specifications.Your Profile ð• Experience: You have 5+ years of professional experience as a Backend or Software Engineer.
- Tech Stack: Strong foundation in database management, Docker containers, and modern cloud infrastructure architecture.

Backend Robustness: Deep understanding of building reliable, secure, and production-ready APIs, handling concurrency, data integrity, and system monitoring.

- Background in fintech, payment platforms, or financial applications is highly valued.
- Product-First Thinking:



You understand why an application is built, how it adapts to clients, and how it impacts the business.
- AI as a Habit: You actively leverage AI assistants and automation tools in your daily coding routine.
- Collaboration: Comfortable working with Agile methodologies, peer reviews, and cross-functional teams.ð How We WorkOffice-first in Barcelona & Madrid, with 20% remote flexibilityA people-first, high-trust culture built on radical candor and ownershipA multicultural team (40+ nationalities) building the next generation of business management softwareð About usAt Factorial, we’re building the leading business management software for companies of all sizes. Our platform centralizes key workflows across HR, finance, and operations, freeing teams from manual processes so they can focus on what really matters: leading, growing, and taking care of their people.ð« Our ValuesWe own it: We take responsibility for every project. We're dedicated to learning something new every day and, above all, share it.High growth, multicultural and friendly environment ðAlan as private health insurance ðºHealthy life with Wellhub (Gyms, pools, outdoor classes) ð§ð½‍️Save expenses with Cobee ðLanguage classes ðð½‍ð«Breakfast in the office and organic fruit ðNora discounts ðFree caffeine and theine Pet Friendly ðð» The hiring processIf you apply, here’s what to expect:A first conversation with our Talent Acquisition Partner. It will be about comparing our expectations and making sure we match on a human level. Here you will have a conversation about the team, their needs, your profile and how can you complement it. One last coffee-chat with our CTO, where you can get all the answers about Factorial’s culture, business vision, or anything else that interests you.And that’s it! The whole process is remote, using videoconferencing tools!

📌 Senior Software Engineer - Finance Services (Barcelona)
🏢 Factorial Hr
📍 Barcelona