74 javascript English-speaking jobs in Barcelona

seeking a Senior Fullstack Software Engineer with strong expertise in Python and solid experience in JavaScript

Front-end/JavaScript Developer needed to build and maintain the core platform. Requires 4+ years in front-end development, strong HTML/CSS, and experience with frameworks like Angular or ReactJS.

JavaScript fatigue? Web page performance optimization at scale? Network latency vs bandwidth? ... company-level technical initiativesWhat you need to succeed: 8+ years frontend development experience (JavaScript

JavaScript fatigue? Web page performance optimization at scale? Network latency vs bandwidth? ... company-level technical initiativesWhat you need to succeed: 8+ years frontend development experience (JavaScript

Backend experience with Ruby on Rails; frontend experience with React, JavaScript, or TypeScript.

Deep expertise in JavaScript/TypeScript and advanced design patterns.

Strong understanding of JavaScript backend ecosystems and libraries.

What you need to succeed Job Requirements 8+ years frontend development experience (JavaScript, HTML,

technical fieldExperience designing microservicesExperience in other languages and platforms (e.g., JavaScript

technical fieldExperience designing microservicesExperience in other languages and platforms (e.g., JavaScript

technical fieldExperience designing microservicesExperience in other languages and platforms (e.g., JavaScript

insights into actionable design decisions Familiarity with front-end technologies (e.g., HTML, CSS, JavaScript

at least 1 OOP language Intermediate knowledge in react native and react Intermediate knowledge in Javascript

.* Solid grasp of our backend stack: NodeJS, TypeScript, JavaScript, and PHP.* Experience running Scrum

Strong technical proficiency in JavaScript, SSJS, AMPscript and HTML/CSS for building custom solutions

Strong technical proficiency in JavaScript, SSJS, AMPscript, and HTML/CSS for building custom solutions

convey complex concepts to diverse audiences with varying backgrounds Working knowledge in Python, JavaScript

Bonus Points Experience with NoSQL, Big Data, Bash, HTML, CSS, JavaScript, TypeScript, or other programming

What we expect from you 8+ years of hands-on engineering experience with a deep frontend background (JavaScript

technical fluency to build — you can prototype with AI tooling, LLM APIs and a scripting language (Python / JavaScript