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 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, and 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, 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 Requirements 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 Dockerli> 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 Benefits 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. Seniority level: Mid‑Senior level Employment type: Full‑time Job function: IT Services and IT Consulting #J-18808-Ljbffr