60 frontend developer English-speaking jobs in Barcelona

You'll help us maintain and add features to our existing Frontend application built with React. ... Lodgify is on the lookout for a Senior Frontend Engineer wanting to join an ever-growing, multicultural ... prioritise value over "over-engineering" Technical Excellence: Build fast, stable, and maintainable frontend ... discussions, focusing on testing, performance, and code quality Continuous Improvement: Participate in frontend-specific

of developers; Continuously research and advocate for improvements in performance, scalability, and developer ... Working with React and modern frontend architectures, you’ll drive technical decisions, mentor developers ... About the Role As a Senior/Lead Frontend Engineer, you will lead the development of modern web applications ... What You Will Do Contribute to the frontend development of new web applications; Design and implement ... and architect scalable features for React applications; Visualize complex data sets using advanced frontend

across frontend and backend systems. ... ABOUT THE ROLE We are looking for a Full Stack Developer to build and integrate LLM‑powered features ... including prompt engineering, API‑based model usage, and AI workflows; Build and maintain React‑based frontend

Design small full‑stack applications (backend + simple frontend). ... Role Overview AI‑First Developer / Builder – we are hiring a developer to work on prototypes, tools, ... Prototype AI‑assisted developer workflows.

Overview We are looking for a Mid-Level Full Stack Developer with experience in .NET to join an internal ... Develop end-to-end features using .NET Core / .NET 6+ on the backend and Razor Views + HTML on the frontend

, data handling patterns, and frontend testing best practices. ... Aleph Full-Stack Developer (f/m/d) About Satellogic Satellogic is a vertically integrated Earth Observation ... About the Position We are seeking an experienced Full‑Stack Developer to take on End‑to‑End ownership ... Core Qualifications Frontend Proficiency: Strong skills in React, TypeScript, modern state management ... Quality & Testing: Proficient in backend testing tools and practices (pytest, coverage, mocks) and frontend

Good Experience/knowledge In collaboration with developer / development structures. ... In software architecture (different frameworks, frontend, backend, cloud computing structures). ... Net, SQL Server, MySQL, PostGres or other similar database; GitLab/Hub/JIRA and similar DevOps tools, frontend

You'll help us maintain and add features to our existing Frontend application built with React. ... Lodgify is on the lookout for a Senior Frontend Engineer wanting to join an ever‑growing, multicultural ... prioritize value over "over‑engineering" Technical Excellence: Build fast, stable, and maintainable frontend ... discussions, focusing on testing, performance, and code quality Continuous Improvement: Participate in frontend‑specific

Proficiency in at least one area: backend (Java), frontend (JavaScript/modern frameworks), or plugin/ ... Familiarity with modern frontend tooling (bundlers, package managers, testing frameworks) is a plus. ... Responsibilities Develop and optimize backend services in Java and/or frontend applications in JavaScript ... Description Join our innovative engineering team, working across Java for backend services, JavaScript for frontend

What You’ll Do Deliver features end‑to‑end across frontend and backend Collaborate with product and ... code quality, performance, and testing Our Stack We work with a modern TypeScript-based stack: Frontend

collaborating with a diverse, talented team and mentoring junior team members You've got experience in both frontend

comfortable diving into the Backend to refine an API or adjust business logic in Python to ensure your Frontend ... interface; someone who understands that a truly intelligent application requires a bridge between elegant frontend

About the job Senior ServiceNow Developer ServiceNow Developer Responsibilities Develop and customize

THE ROLE As our Frontend Engineer, you'll drive the development and maintenance of our high‑performance

experience with React and TypeScript or strong JavaScript Experience integrating REST APIs on the frontend ... and handling loading and error states Familiarity with frontend testing frameworks such as Jest Upper‑intermediate

experience with React and TypeScript or strong JavaScript Experience integrating REST APIs on the frontend ... and handling loading and error states Familiarity with frontend testing frameworks such as Jest Upper‑intermediate

model, and everyone contributes to developer tooling. ... Technology Stack TypeScript (frontend & backend), Node.js, React, Apollo GraphQL, Postgres, Redis. ... We take developer experience and reliability seriously: all engineers are on call in a follow‑the‑sun ... where you come in: you, too, will own projects end‑to‑end and have an impact on core parts of the Ashby developer

Jump into our systems and code to debug a customer issue, ship a small bug fix, or improve our developer ... I’m sharing our tech stack with the caveat that we don’t require previous experience: TypeScript (frontend ... love being technical and can hold in-depth conversations with direct reports from infra to backend to frontend

Technology Stack TypeScript (frontend & backend), React, GraphQL API, Node.js, Postgres, Redis.

Technology Stack TypeScript (frontend & backend), React, GraphQL API, Node.js, Postgres, Redis. ... tackle any part of a technology stack and do what’s necessary to deliver a feature, whether writing frontend