Senior Full Stack Developer

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:

• Join our team as a Senior Full Stack Engineer and help build the platforms and tools that enable partners to seamlessly onboard their apps and channels to Titan OS.
• You’ll develop full-stack solutions powering our Partner Solutions ecosystem, including web tools, APIs, and services that simplify and automate content and app onboarding.

This is a high-impact role for an engineer passionate about developer tooling, platform enablement, and technical ownership, with the opportunity to shape systems that support our global partner network.

Key responsibilities:

• Full-Stack Development: Design, build, and maintain scalable, secure, and high-quality web applications using Next.js, TypeScript, and Node.js.

API Integration & Development: Lead the integration of our platform with a wide range of third-party and internal APIs to expand functionality. You will also contribute to the development and maintenance of our existing backend services.

• Architectural Ownership: Evolve our existing full-stack architecture, making key technical decisions to ensure our platforms are scalable and maintainable for the future.
• Problem Solving & Ambiguity: Tackle complex challenges, working collaboratively with product and design to clarify uncertain requirements and deliver effective technical solutions.

CI/CD and DevOps: Own and enhance the complete CI/CD process using GitHub Actions. This includes managing automated pipelines for testing, versioning, building, and publishing Docker images, and handling deployments.

• Backend & Database Management: Develop robust backend services and manage the database lifecycle, including schema design and migrations using Prisma.
• Championing Best Practices: Establish and enforce a strong testing culture using frameworks like Vitest and React Testing Library to ensure application reliability and quality.
• Technical Leadership & Mentorship: Provide technical guidance to other developers, lead architectural discussions, and maintain high standards for code quality through code reviews.

Our Tech Stack:

Framework: Next.js, React.js, Node.js Language: TypeScript Styling: Tailwind CSS, Radix UI Database: PostgreSQL with Prisma (ORM) CI/CD: GitHub Actions, Docker Infrastructure: Nginx, Redis Testing: Vitest, React Testing Library 5+ years of experience building full-stack web applications with Node.js and TypeScript.

• Deep expertise in React.js and extensive hands-on experience with Next.js in a production environment.
• Proven experience building and consuming APIs.

Solid experience with relational databases (like PostgreSQL) and ORMs (specifically Prisma). Hands-on experience managing CI/CD pipelines (GitHub Actions preferred) and working with Docker. Strong understanding of computer science fundamentals, software architecture, and best practices. A passion for writing clean, high-quality, and maintainable code. Strong experience with modern testing frameworks like Vitest and React Testing Library (RTL).

Nice to have:

• Experience developing or maintaining SDKs, npm libraries.
• Experience with state management libraries like Zustand.
• Familiarity with component libraries such as Radix UI.
• Previous experience in a tech lead or mentorship capacity.

Hiring process:

Meet our Talent Acquisition team Conversation with the VP of Engineering Technical assessment Pair Programming review with team members

Reasons to apply:

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.
• 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!