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# Senior Backend Engineer (Ruby On Rails)

- **Company:** Titan OS
- **Location:** Barcelona, Spain
- **Contract:** Permanent contract
- **Skills:** Application Programming Interfaces (APIs), Amazon Web Services, Microsoft Azure, Cloud Computing, Code Review, Databases, Data Architecture, DevOps, NoSQL, Performance Tuning, Ruby on Rails, Ruby, Software Engineering, SQL Databases, System Availability, Backend, Containerization, Information Technology, Restful APIs, Docker
- **Published:** September 17, 2026
- **Apply:** https://www.buscojobs.com.es/senior-backend-engineer-ruby-on-rails-en-barcelona-ID-372303376

## About the Role

+7 years of professional experience as a Backend Engineer, working on large-scale systems
Proficiency in Ruby on Rails
Strong knowledge of database systems (SQL and NoSQL), with experience in designing efficient data architectures
Experience with cloud platforms like AWS, GCP, or Azure, and familiarity with containerization tools like Docker and Kubernetes
Solid understanding of RESTful API design and development, including experience integrating third-party services
A strong focus on performance optimization, scalability, and security
Excellent problem-solving skills and attention to detail
A Bachelor's degree in Computer Science, Software Engineering, or a related field is preferred but not required
Strong communicator and fluent in English

## Description

Titan Operating System S.L. (Titan OS), the Barcelona-based technology, entertainment, and advertising company, is looking for you!At TitanOS, we live by three core values:Make things happen - We take ownership, move fast, and deliver impactNo ego - We collaborate with respect and humility to reach shared goalsShow genuine passion - We love what we do and never stop learningCulture and environment are at the heart of our ethos. If the above resonates with you, keep reading because we believe you could be a perfect addition to our incredible team!Role overviewWe are looking for a Senior Backend Engineer with a deep understanding of server-side technologies and a passion for building highly scalable systems that power industry-leading applications. You will be responsible for designing, developing, and maintaining the backend infrastructure that drives our products and services, ensuring they are secure, reliable, and performant.You'll be instrumental in architecting and delivering robust solutions that power the core functionality of our business. This role is for someone who thrives on solving complex problems and is driven by the desire to contribute to a high-impact product every day.Key ResponsibilitiesDesigning and developing highly scalable backend services and APIs to support front-end applications and third-party integrationsBuilding and maintaining databases, ensuring data is stored securely and can be accessed efficientlyCollaborating with front-end developers, DevOps, and product teams to define and implement new featuresOptimising the performance and reliability of server-side code to ensure seamless user experiencesEnsuring the security of backend systems through the implementation of best practices and security protocolsWriting clean, maintainable, and well-documented code, adhering to industry standards and team best practicesMonitoring and troubleshooting production systems, ensuring high availability and rapid response to issuesParticipating in code reviews and contributing to the continuous improvement of development processesWhat makes you a great fit+7 years of professional experience as a Backend Engineer, working on large-scale systemsProficiency in Ruby on RailsStrong knowledge of database systems (SQL and NoSQL), with experience in designing efficient data architecturesExperience with cloud platforms like AWS, GCP, or Azure, and familiarity with containerization tools like Docker and KubernetesSolid understanding of RESTful API design and development, including experience integrating third-party servicesA strong focus on performance optimization, scalability, and securityExcellent problem-solving skills and attention to detailA Bachelor's degree in Computer Science, Software Engineering, or a related field is preferred but not requiredStrong communicator and fluent in EnglishBenefitsCompetitive compensationPrivate health insuranceFriendly, diverse, and international work environmentOpportunity to work outside of your comfort zone and develop professionally in an exciting and fast-growing CTV industryChange the future of TV! A unique opportunity to join a well-funded, high-growth company in the early stages to help shape a product/business that will impact millions#J-*****-Ljbffr


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