The English-language job board for Spain

Backend Developer Intern

On-site in Barcelona·Added 3 days ago

Titan OS

20 open roles

Apply

Overview

Requirements

Have the right to work in Spain
Titan OS doesn't mention sponsorship in the ad.
Work on-site in Barcelona
No relocation package mentioned.
University degree
“Pursuing a Bachelor's or Master's degree in Computer Science, Software Engineering, or a related field.” — per the ad.

Pay & benefits

What you'll get

Compensation in line with the internship programme
Opportunity to be part of a dynamic and collaborative international environment
Hands-on experience and exposure to real business projects
Opportunity to learn and develop your skills alongside an experienced team
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.

Requirements

What we're looking for

Pursuing a Bachelor's or Master's degree in Computer Science, Software Engineering, or a related field.
Strong grasp of data structures, algorithms, and core CS principles (e.g., SOLID).
Experience (classwork or personal projects) with at least one backend language or framework (e.g., Ruby/Rails, Python/Django, Node.js/Express).
Familiarity with relational databases (MySQL, PostgreSQL) and basic SQL querying.
Understanding of RESTful principles and how to consume or implement web services.
Awareness of unit tests or integration tests; eagerness to learn test‑driven development.
Ability to articulate ideas clearly and work in a collaborative, fast‑paced environment.

Nice to have

Experience or coursework involving Elasticsearch (indexing, optimizing queries).
Exposure to AWS services (EC2, S3, RDS) and CI/CD tools (e.g., GitHub Actions).
Basic understanding of key‑value or document stores (Redis, MongoDB).
Interest in logging, metrics, or tracing tools (e.g., Prometheus, Grafana).
Familiarity with Go, Ruby, or another modern backend language.

The role

As a Backend Developer Intern, you'll collaborate with our engineering team to help design, build, and scale APIs that power our Smart TV platform. This is a hands-on university internship where you'll gain real‑world experience in software development, participate in the full product lifecycle, and contribute to projects used by millions of users.

What you'll do

Feature Development: Design, implement, test, and document new API endpoints and enhancements.
Code Reviews & Collaboration: Participate in peer reviews; give and receive constructive feedback. Work closely with product owners and teammates to prioritize and scope tasks.
Follow Agile Processes: Adhere to sprint ceremonies, ticketing workflows, and documentation practices.
Monitor & Measure: Assist in establishing basic SLAs and KPIs for service performance; learn to track and report on these metrics.

About Titan OS

Titan OS is an advertising technology (AdTech) company that develops a connected TV (CTV) operating system and platform, enabling advertisers to deliver and manage campaigns on smart TVs. The company operates at the intersection of software and media, providing a full-stack solution that includes device firmware, a backend platform, and data-driven advertising tools.

In Spain, Titan OS is headquartered in Barcelona, which serves as the company's main European hub. The Barcelona office is a key engineering center, housing a significant portion of the company's product and engineering teams, making it a relevant destination for international tech professionals. The work culture is described as fast-paced and product-focused, with a strong emphasis on technical excellence and ownership, and the team communicates in English, making it accessible for international hires.

Industry: AdTech
Founded: 2012
Employees: 100–500
Headquarters: Barcelona, Spain
In Spain: Barcelona
Website: titanos.tv

Good to know if you are moving

Barcelona is the company's main engineering hub outside of its founding market, with a large concentration of product and engineering roles.
The company's working language is English, making it accessible for international professionals without requiring Spanish fluency.
The company offers a modern tech stack (Go, Ruby on Rails, React) and the opportunity to work on connected TV (CTV) firmware and backend systems.
The Barcelona office is located in a prime tech hub with a strong international talent pool and a high quality of life.
The company is at the forefront of the CTV/AdTech space, a rapidly growing sector within digital advertising.

In their own words

About the company & team

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!

All open roles at Titan OS