Is this you? 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 impact
No ego - We collaborate with respect and humility to reach shared goals
Show genuine passion - We love what we do and never stop learning
Culture 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 overview: We are looking for a Senior Backend Engineer (Ruby on Rails Developer) 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 Responsibilities Designing and developing highly scalable backend services and APIs to support front-end applications and third-party integrations
Building and maintaining databases, ensuring data is stored securely and can be accessed efficiently
Collaborating with front-end developers, DevOps, and product teams to define and implement new features
Optimising the performance and reliability of server-side code to ensure seamless user experiences




Ensuring the security of backend systems through the implementation of best practices and security protocols
Writing clean, maintainable, and well-documented code, adhering to industry standards and team best practices
Monitoring and troubleshooting production systems, ensuring high availability and rapid response to issues
Participating in code reviews and contributing to the continuous improvement of development processes
Requirements What makes you a great fit:
+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
Benefits Reasons to apply: Competitive compensation
Private health insurance
Friendly, diverse, and international work environment
Opportunity to work outside of your comfort zone and develop professionally in an exciting and fast-growing CTV industry
Change 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-18808-Ljbffr

📌 Senior Backend Engineer (Ruby On Rails) (Barcelona)
🏢 Titan OS
📍 Barcelona