Senior Backend Engineer | Up to 85k | R100% Remote (Only Spain)
4 days ago
Murcia
About the role Our client, a fast-growing international scale-up, headquartered in Barcelona, is looking for a Senior Backend Engineer with frontend capabilities to join its engineering team. The company’s platform empowers thousands of users worldwide, and as they continue scaling at high speed, this role will be key in designing scalable backend systems, building high-performance APIs, and occasionally contributing to the frontend. The Senior Backend Engineer will help shape architecture decisions, mentor peers, and set engineering standards that will support the transition from startup to global leader. This position offers high ownership and the opportunity to work closely with Product, Design, and Customer Care teams, delivering robust, observable, and well-documented solutions in a dynamic, collaborative environment. Key Responsibilities • Design, develop, and maintain scalable backend systems with clean, maintainable code., • Build and optimize RESTful APIs and data pipelines for reliability, security, and performance., • Translate product requirements into well-structured technical solutions., • Ensure system observability through monitoring, logging, and alerting best practices., • Provide technical support by troubleshooting and resolving complex issues., • Evolve the platform from MVP to enterprise scale, ensuring resilience under high traffic., • Contribute to frontend tasks when needed (React components, API integrations, UI features)., • Partner with frontend engineers for seamless end-to-end delivery., • Mentor junior and mid-level engineers, conduct code reviews, and promote engineering best practices. About you • 5+ years of professional experience in backend engineering, with strong expertise in Ruby on Rails., • Deep experience designing APIs, optimizing ActiveRecord, and managing background jobs (Sidekiq, Resque)., • Exposure to React or other modern frontend frameworks (Vue, Angular)., • Solid knowledge of JavaScript/TypeScript, HTML, CSS, and UI frameworks (Tailwind, Bootstrap, Material UI)., • Strong grasp of distributed systems, service-oriented architecture, and design patterns., • Experience with cloud platforms (AWS, GCP, or Azure)., • Skilled in backend testing frameworks (RSpec, Minitest) and familiar with frontend testing (Jest, Cypress)., • Previous experience with Golang is a strong plus., • Familiar with CI/CD pipelines and Infrastructure-as-Code tools (Terraform, Ansible)., • Experience working with monorepo architectures., • Fluent in English with strong collaboration and communication skills. Benefits 💸 Salary up to 75-85k + full remote, only accepting candidates in living in Spain 💊 Comprehensive medical and wellness coverage. 💰 Stock Options to share in the company’s success. 🥐 Modern office in central Barcelona with rooftop views, daily fruits, Tuesday breakfasts & Thursday afterworks. 🎉 Monthly team events – from sailing and Cirque du Soleil to cooking, poetry, or magic workshops. 💳 Flexible salary access – no need to wait until month-end. 🍽️ Flexible remuneration on restaurants, transport, kindergarten & training. 📈 Strong growth opportunities in a fast-scaling, international environment (35+ nationalities). 📚 Unlimited learning support: any book you want, plus access to an internal knowledge library. 👉 A great opportunity for a Backend Engineer with a product mindset, eager to make an impact in an ambitious international scale-up while growing within a talented engineering team.