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Full Stack Developer

On-site in Barcelona·Added 2 days ago (last checked 10 Nov)

Titan OS

21 open roles

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Our summary

Work mode: On-site, Barcelona
English: Required
Experience: 2+ years
Benefits: Private health insurance

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Skills

Nice to have

Requirements

What we're looking for

2+ years of relevant experience as a full-stack developer with TypeScript, React and Node.js
Experience working on production applications, ideally including authentication, database migrations or third-party integrations
Experience with Replit, including hosting, deployments, environments and secrets management
Working knowledge of PostgreSQL and SQL, and familiarity with Drizzle ORM or a similar TypeScript ORM
Understanding of authentication (sessions, JWTs, OAuth, role-based access), ideally with Supabase Auth
Good knowledge of HTML5, CSS and Tailwind CSS
Experience writing automated tests, ideally with Vitest and Playwright
Awareness of web application security basics (OWASP Top 10, secrets handling, dependency updates)
Experience integration AI services or LLM APIs into production applications

Nice to have

Nice to have: Experience with advertising technology or integrating ad platforms (VAST)

Pay & benefits

What you'll get

Centrally located office in the heart of Barcelona, with public transportation nearby
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.

The role

As a Full-Stack Developer, you will help maintain and grow our advertising platform, which is developed and hosted on Replit. You'll work across the whole stack, from the React front end to the Node.js API and PostgreSQL database. You'll help keep a live production system secure and reliable while delivering new features and integrations.

What you'll do

Design, code, test, maintain and deliver features across the React front end and the Node.js/Express API
Build and maintain integrations with third-party APIs and services
Investigate and fix production bugs, find the root cause and prevent regressions
Maintain authentication and access control built on Supabase
Write and run database schema changes and migrations with Drizzle ORM, safely and without data loss
Write and maintain automated tests with Vitest, Playwright and Node.js tests
Keep the platform secure: dependency updates, secrets management, input validation and access control
Manage deployments, environments and releases on Replit
Document code and technical decisions so the platform stays easy to maintain

Hiring process

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!

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

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!

Our platform combines content discovery and advertising technology in one solution, helping leading TV brands unlock greater value. Titan OS powers devices from major brands including Philips, AOC and JVC, reaching millions of viewers across Europe and LATAM. Titan OS is also powering free premium FAST Channels on selected SONY Android TVs.

Over the last two years, Titan OS has grown revenue 10x and attracted leading investors, including Highland Europe and Mangrove.

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