238 javascript English-speaking jobs in Madrid

You will have an understanding of JavaScript and modern API security (OAuth2, JWT).

Requirements TypeScript/JavaScript and React - you can design, build, and maintain complex frontends

English 3–7 years of professional software engineering experience Strong proficiency in Python and JavaScript

Solid experience with HTML5, CSS3, and modern JavaScript (ES6+).

Other programming languages: Python and scripting languages (TCL, JavaScript).

Web development and JavaScript knowledge is a plus.

Solid knowledge of REST APIs scripting or programming (JavaScript Python or similar).

Strong understanding of web application development, with experience in PHP and JavaScript preferred.

Lead Front-End Developer with 3.5+ years experience in JavaScript, CSS, and at least one of Angular, React, or Vue. Experience with MongoDB is a plus. Fluent English and familiarity with Agile methodologies required. Remote work possible with preference for hybrid model from European offices.

do: The Role’s Key Responsibilities and Tasks Work with a top-notch tech stack such as ES6 code, Javascript

Basic proficiency in JavaScript/TypeScript and interest in modern frontend frameworks (React, Angular

developer with extensive experience in developing Front end applications with JavaScript (ES5/ES6), ... of our retail tribes you should have the following knowledge and experience: Essential: A hardcore JavaScript

Design and implement scalable tagging architectures and data‐collection components, leveraging Java and JavaScript ... Strong experience with Java for front-end or backend data collection utilities • Solid understanding of JavaScript

) Python (pandas, data manipulation) SQL (basic to intermediate) Basic web fundamentals (HTML, CSS, JavaScript

Python, R, Javascript, VBA, Access, .NET, Java, SQL or similar Prior experience delivering AI Automation

Similar to how Node.js enabled server-side JavaScript, we enable server-side WebAssembly for all supported

Strong knowledge of TypeScript, modern JavaScript and component‑based architecture.

workflows Experience deploying and operating frontend apps with AWS Amplify Deep understanding of JavaScript

years in Software QA Proven expertise with Playwright (Node.js) — must-have Strong understanding of JavaScript

vendors such as Cloudflare, F5, Imperva, Akamai, or similar Scripting or automation skills (Python, JavaScript