Senior Back-End Engineer (with Frontend Capabilities)

At Amenitiz, we’re on a mission to simplify hospitality management, whether it's in the bustling streets of Paris or the serene Uyuni Salt Flats of Bolivia.

Empowering over 14,000 hoteliers worldwide, we’re more than just another SaaS scale-up—we’re revolutionizing one of the world’s oldest industries. With over $50 million raised from top-tier VCs who back disruptive giants like Alibaba, Toast, Zendesk, Delivery Hero, Revolut, and Loom, we've been recognized as a TravelTech Titan and one of Wired's hottest start-ups.

Our team, nearly 300 strong, is based in beautiful Barcelona. At Amenitiz, we cultivate a culture of positivity and personal growth. Our team members are enthusiastic, thrive on ownership, and excel in collaboration. Every day, we lead by example, prioritizing client satisfaction and executing with excellence. We are committed to making a positive impact wherever we go.

About the role

As a Senior Software Engineer, you will lead the development of scalable backend systems and high-performance APIs, playing a key role in the architectural evolution of our platform. While your primary expertise will be in backend development, you will also contribute to frontend projects when needed, making you a highly versatile and cross-functional member of the engineering team. You will mentor peers, set and uphold engineering standards, and collaborate closely with cross-functional teams to deliver robust, observable, and well-documented solutions in a fast-paced, high-growth environment.

Key Responsibilities

• Design, develop, and maintain scalable, maintainable, and performant backend systems with a focus on high-quality code and best practices.
• Build and optimize RESTful APIs and data pipelines, ensuring reliability, security, and scalability.
• Work with Product Managers to refine requirements and translate them into well-structured technical solutions.
• Maintain comprehensive API and system documentation to support internal teams and future development.
• Implement observability best practices using monitoring, logging, and alerting tools to ensure system reliability and performance.
• Provide technical support to the Care team by troubleshooting and resolving complex issues efficiently.
• Contribute to the evolution of our platform from MVP to enterprise-scale, optimizing for high-traffic and high-performance use cases.
• Take ownership of frontend tasks when required, including developing React components, integrating APIs, and implementing UI features.
• Collaborate with dedicated frontend engineers to ensure seamless integration between backend and frontend systems.
• Mentor junior and mid-level engineers, conduct code reviews, and promote best practices across the team.

About you

• 5+ years of professional experience as a Software Engineer, with a strong focus on backend and API development.
• Expert-level proficiency in Ruby on Rails, including API design, ActiveRecord optimization, and background job processing (Sidekiq, Resque).
• Experience with React or similar modern frontend frameworks (Vue, Angular) for occasional UI development.
• Strong knowledge of JavaScript/TypeScript, HTML, and CSS, including responsive and accessible UI design.
• Skilled in CSS frameworks such as Tailwind CSS, Bootstrap, or Material UI.
• Solid understanding of distributed systems, service-oriented architecture, and design patterns.
• Experience working with cloud platforms (AWS, GCP, or Azure) for deploying and scaling applications.
• Proficient with backend testing frameworks (RSpec, Minitest) and familiar with frontend testing tools (Jest, Cypress).
• Strong collaboration skills and fluency in English, with the ability to work effectively in cross-functional teams.
• Experience with Golang for backend services.
• Familiarity with CI/CD pipelines and infrastructure-as-code tools (Terraform, Ansible).
• Experience with monorepo architectures for managing full-stack applications

Our Benefits

• 💊 Extensive medical, and wellness coverage to ensure you’re feeling great physically and mentally.
• 💰 We provide Stock Options that ensure you have ownership in our success.
• 🥐 Our beautiful and spacious office is located right in the heart of Barcelona (Ronda de Sant Pere). Daily fruits, Tuesday breakfasts, Thursday after-office, and everyday sunshine and views at the rooftop.
• 🎉 We do monthly team-building activities. From sailing the Mediterranean Sea and shows like Cirque du Soleil, to poetry, cooking, or magic workshops.
• 💳 Forget about waiting till the end of the month to get paid. Access your salary any day you want!
• 🍽️ Flexible remuneration: enjoy saving on restaurants, kindergarten, transport, and training.
• 📈 Exponential growth opportunities within an energetic, fast-growing, and international environment (35+ nationalities).
• 📚 Eager to be inspired and learn? We will buy ANY book you want, while also having a deep library with amazing knowledge to trigger your growth.

If you’re a strategic thinker with a passion for driving growth and innovation, we want to hear from you! Apply now to join our team and be a part of our exciting journey at Amenitiz!