?‍? 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 code quality, testing, and software development best practices.

- Ability to work independently and propose efficient solutions.

- Collaborative, humble, and team-oriented mindset.

- Advanced level of English (written and spoken), with the ability to communicate effectively in an international environment.

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