?‍? Senior Backend Developer (Ruby on Rails)

? Madrid, A Coruña, Salamanca, Barcelona, Ciudad Real | ?‍? Hybrid Model | ? Full-time | ? Permanent Contract

At TeamSystem | Quipu, we help thousands of freelancers, SMEs, and accounting firms across Spain manage their businesses simply and efficiently ?✨ through an intuitive and reliable SaaS platform.

Since October 2025, Quipu has been part of TeamSystem, a leading international business software group, enabling us to continue innovating and scale our product with a long-term vision.

? Your Mission

We are looking for a Senior Backend Developer (Ruby on Rails) to help us continue evolving our SaaS product.
You will join a highly skilled Product and Technology team, actively contributing to the development of new features and the continuous improvement of a platform used by thousands of customers every day.
Your work will have a direct impact on the quality, scalability, and future evolution of the product.

?️ Technology Stack
Backend
- Ruby on Rails
- Elasticsearch
- Sidekiq
- Redis
- MySQL
- REST APIs

Frontend




- JavaScript (ES6+)
- React
- React Native

Infrastructure
- AWS
- Nginx
- Capistrano
- Ansible
- Terraform

? What Will You Do?
- Improve and maintain the existing SaaS product while developing valuable new features.
- Build backend solutions using Ruby on Rails and related technologies.
- Participate in the full Agile development lifecycle, including refinement, estimation, technical analysis, and delivery.
- Collaborate closely with the Product Owner and the development team.
- Work cross-functionally with Sales, Marketing, and Customer Success teams.
- Contribute your expertise to discuss and define technical approaches and solutions.
- Take ownership of your developments end-to-end, ensuring quality standards and best practices are followed.

✅ What We’re Looking For
- Strong experience as a Backend Developer with Ruby on Rails.
- Solid understanding of designing and consuming REST APIs.
- Focus on co

📌 Ruby on Rails Backend Developer (Madrid)
🏢 Quipu App
📍 Madrid