Go Backend Engineer — Scale-Driven Systems (Barcelona)

Titan OS Partnership; Barcelona; On-site; EUR 70,000 - 100,000; Full time

Benefits offered by this job

Central Barcelona office

Private health insurance

Diverse international team

Competitive compensation

Job summary

Titan Operating System S.L. (Titan OS) in Barcelona seeks a Senior Backend Engineer specialized in Go to design, develop, and maintain scalable server infrastructure powering our products and services.

You will build robust APIs, manage databases, and collaborate with frontend, DevOps, and product teams to deliver high-quality, secure, and reliable systems. A passion for performance and security is essential, with fluent English and a drive to contribute to a fast-growing CTV industry.

Qualifications

• +6 years of professional experience as a Backend Engineer for large-scale systems.
• Proficiency in Go and strong knowledge of database systems (SQL and NoSQL).
• Experience with cloud platforms (AWS, GCP, or Azure) and containerization (Docker, Kubernetes).
• Solid understanding of RESTful API design and integrating third-party services.
• Focus on performance, scalability, and security with excellent problem-solving skills.
• Bachelor's degree preferred but not required.

Responsibilities

• Design and develop highly scalable backend services and APIs for front-end apps and third-party integrations.
• Build and maintain databases ensuring secure, efficient data access.
• Collaborate with front-end, DevOps, and product teams to define and implement features.
• Optimize performance and reliability of server-side code for seamless UX.
• Ensure backend security through best practices and secure protocols.
• Write clean, well-documented code and participate in code reviews.

Skills

Go

REST API design

System architecture

English communication

Education

Bachelor's degree in Computer Science or related field

Tools

Docker

Kubernetes

AWS

GCP/Azure

SQL/NoSQL databases

Job description

Titan Operating System S.L. (Titan OS) in Barcelona seeks a Senior Backend Engineer specialized in Go to design, develop, and maintain scalable server infrastructure powering our products and services.

You will build robust APIs, manage databases, and collaborate with frontend, DevOps, and product teams to deliver high-quality, secure, and reliable systems. A passion for performance and security is essential, with fluent English and a drive to contribute to a fast-growing CTV industry.