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AI Engineer

On-site in Barcelona·Added 3 days ago

Titan OS

20 open roles

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.

  • Have 2+ years of experience

    Junior-level role.

  • University degree

    “Bachelor's or Master's program in Computer Science, Data Science, Machine Learning, or a related field.” — per the ad.

Pay & benefits

What you'll get

  • Competitive compensation
  • Private health insurance

Requirements

What we're looking for

  • 2-3 years of experience in AI Engineering, with significant recent experience designing and deploying Gen AI and LLM-based solutions.
  • Proven hands-on experience building end-to-end ML/DL pipelines
  • Bachelor's or Master's program in Computer Science, Data Science, Machine Learning, or a related field.
  • Solid grasp of probability, statistics, linear algebra, and algorithms.
  • Exposure to LLM-powered agents, familiarity with RAG pipelines, as well as with tool/function calling, multi-step planning and orchestration.
  • Proficiency in Python; familiarity with at least one ML/RL or deep-learning framework (PyTorch, TensorFlow, JAX).
  • Experience with SQL (BigQuery, PostgreSQL) and pandas / Spark.
  • Recommender Systems Exposure
  • API Know-How: Understanding of REST services and how models are surfaced as endpoints.
  • Testing & Documentation: Awareness of unit/integration testing for data pipelines and eagerness to learn experiment-driven development.
  • Soft Skills: Clear communicator who thrives in a fast-paced, collaborative environment.

Nice to have

  • Familiarity with real-time stream processing (Kafka, Flink)
  • Exposure to AWS/GCP AI services
  • Interest in LLM-based recommendation, embeddings, or content understanding.
  • Basic knowledge of observability stacks (Prometheus, Grafana)
  • Comfort with an additional backend language (Go, Node.js, or Ruby) for service integration.

The role

As an AI & Content-Recommendation Engineer, you'll work with our Machine-Learning and Backend teams to design, train, and deploy the models and data pipelines that decide "what to watch next" on our Smart TV platform. You'll gain hands-on experience across the full ML lifecycle - from exploratory data analysis through online A/B testing - while shipping features used by millions of viewers worldwide.

What you'll do

  • Design, build and deploy LLM-powered agents that improve recommendation and information-retrieval experiences.
  • Prototype and train ranking/recommendation models from large-scale interaction logs.
  • Design offline metrics and analyze results. Help set up or monitor online A/B tests; turn findings into iteration plans.
  • Expose recommendation APIs and integrate them with our existing Go / Ruby services.
  • Contribute to CI/CD pipelines for data & model versioning (GitHub Actions, Docker).
  • 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!

Additional information

  • 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.

If you're excited about this position, don't hesitate to apply. We're waiting for you to join us! And if you want to know more about us, follow us on LinkedIn!

All open roles at Titan OS

Location

Titan OS · Barcelona

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