Full-Stack Developer for Impactful CTV Platform (React/Node)

Titan OS; Barcelona; Presencial; EUR 60.000 - 90.000; Jornada completa

Ventajas ofrecidas por este puesto de trabajo

Private health insurance

Central Barcelona location

International team

Descripción de la vacante

Titan OS in Barcelona is seeking a passionate Full-Stack Developer to maintain and grow our online advertising platform built with React/Node.js and a PostgreSQL backend. You will work across the stack, implementing features, integrations, and authentication while ensuring reliability on a Replit-hosted production system.

Strong TS/React/Node skills and familiarity with modern web tooling are essential. Experience with Supabase Auth, Drizzle ORM, Vitest, Playwright, and CI/CD on Replit is

Formación

• 2+ years of full-stack development experience with TS/React/Node.js
• Experience with production applications including authentication, migrations or integrations
• Experience with Replit hosting, deployments, environments and secrets management
• Knowledge of PostgreSQL/SQL and Drizzle ORM or similar TS ORM
• Understanding of authentication (sessions, JWTs, OAuth, RBAC), preferably Supabase Auth
• Proficiency in HTML5, CSS and Tailwind CSS
• Experience writing automated tests (Vitest, Playwright)
• Awareness of web application security basics (OWASP Top 10)
• Experience integrating AI services or LLM APIs into production apps
• Nice to have: ad tech experience or VAST integrations

Responsabilidades

• Design, code, test, maintain and deliver features across React front end and Node.js/Express API
• Build and maintain integrations with third-party APIs and services
• Investigate and fix production bugs, identify root causes and prevent regressions
• Maintain authentication and access control built on Supabase
• Write and run database schema changes and migrations with Drizzle ORM
• Write and maintain automated tests with Vitest, Playwright and Node.js tests
• Keep the platform secure: dependency updates, secrets management, input validation
• Manage deployments, environments and releases on Replit
• Document code and technical decisions for long-term maintainability

Conocimientos

TypeScript

React

Node.js

Web security concepts

Herramientas

Replit hosting

Supabase Auth

Drizzle ORM

Vitest

Playwright

PostgreSQL

SQL

VAST (advertising)

Descripción del empleo

Titan OS in Barcelona is seeking a passionate Full-Stack Developer to maintain and grow our online advertising platform built with React/Node.js and a PostgreSQL backend. You will work across the stack, implementing features, integrations, and authentication while ensuring reliability on a Replit-hosted production system.

Strong TS/React/Node skills and familiarity with modern web tooling are essential. Experience with Supabase Auth, Drizzle ORM, Vitest, Playwright, and CI/CD on Replit is