Senior Full Stack Dev – React/Next.js, AI Tools, Valencia

Óscala; Valencia; Hybrid; EUR 55,000 - 75,000; Full time

Job summary

Óscala is building a delivery centre in Valencia, Spain, seeking an experienced full stack developer to own strategic client projects over multi-year engagements. You’ll work in a hands-on capacity with React, Next.js, Node.js and modern cloud architectures, applying AI tooling to accelerate delivery while maintaining quality.

You’ll join a growing team in a hybrid Valencia-based setup, collaborating with product, design and architecture to ship robust, secure software across long-term projects.

Qualifications

• 5 years or more of full stack development experience.
• Excellent command of React and Next.js.
• Solid back-end experience with Node.js and ideally Java/Spring Boot or Python.
• Real DevOps culture: CI/CD, containerisation with Docker, exposure to Kubernetes.
• Genuine curiosity and hands-on practice with generative AI and automation tools.
• Pragmatic, delivery-focused, and serious about clean code.
• Good communication, comfortable working inside a team.

Responsibilities

• Build and maintain high performance web applications with React, Next.js and Node.js.
• Design and develop the APIs and services behind them.
• Use and integrate AI tools such as GitHub Copilot, Claude and ChatGPT to accelerate development and documentation.
• Automate the repetitive work: testing, CI/CD, monitoring.
• Work on modern architectures: microservices, APIs, cloud on AWS, Azure or GCP.
• Own the quality and the security of what you ship.
• Work closely with the product, design and architecture teams.

Skills

Full stack development

React

Next.js

Node.js

CI/CD

Docker

Kubernetes

AI tooling

Tools

GitHub Copilot

Claude

ChatGPT

Job description

Óscala is building a delivery centre in Valencia, Spain, seeking an experienced full stack developer to own strategic client projects over multi-year engagements. You’ll work in a hands-on capacity with React, Next.js, Node.js and modern cloud architectures, applying AI tooling to accelerate delivery while maintaining quality.

You’ll join a growing team in a hybrid Valencia-based setup, collaborating with product, design and architecture to ship robust, secure software across long-term projects.