Senior Front-End Developer

Capitole; Donostia/San Sebastián; Presencial; EUR 40.000 - 60.000; Jornada completa

Descripción de la vacante

A tech company in Spain is seeking a Senior Front-End Engineer with expertise in JavaScript and TypeScript. The role involves leading architectural decisions and mentoring junior developers. Candidates should have strong experience in React and Next.js, and a solid grasp of performance optimization. On-site presence is required once every month and a half, mainly in Barcelona.

Formación

• Proven experience in leading architectural decisions.
• Deep expertise in JavaScript/TypeScript and design patterns.
• Strong ability to manage rendering strategies (SSR, CSR, ISR).

Responsabilidades

• Lead architectural decisions in complex React or Next.js projects.
• Optimize performance and manage state effectively.
• Mentor other developers and ensure code quality.

Conocimientos

JavaScript

TypeScript

React

Next.js

Performance Optimization

API Integration

Mentorship

Descripción del empleo

Overview

Senior Front-End Engineer - CAPITOLE. We are looking to reinforce our team with a Senior Front-End Engineer with solid experience in code architecture and algorithmics, capable of making complex technical decisions and structuring medium / large scale applications.

Location: On-site presence required, 1 time every month and a half. Barcelona.

Responsibilities

• Proven experience leading architectural decisions in complex React or Next.js projects.
• Deep expertise in JavaScript / TypeScript and advanced design patterns.
• Strong ability to optimize performance and manage rendering strategies (SSR, CSR, ISR).
• Solid grasp of data structures and algorithms, and how they impact front-end performance.
• Experience working with complex API integrations and modern state management (Zustand, Redux, TanStack, etc.).
• Capable of mentoring other developers and reviewing code with a focus on quality and scalability.

Qualifications

• Languages: English - C1 / Spanish - B2.

Security / NDA

The employee will adhere to information security policies: will have access to confidential information related to Capitole and the project they are working on. Must comply with the security policies and internal policies of the company and the client. Must sign an NDA.