Top Front End Developer Jobs in Valencia

Build and maintain scalable frontend applications using React and TypeScript. Contribute to frontend architecture, performance optimization, state management, and collaborate with UX/UI, product, and backend teams in enterprise environments. Participate in technical discussions, code reviews, and uphold code quality and maintainability.

Build and ship production-grade React features focused on onboarding, account overview, and key transactions. Contribute to shared frontend foundations, ensure security, accessibility (WCAG), and regulatory compliance, improve delivery quality and observability, monitor production health and remediate incidents, and collaborate with Product, Design, Backend, Mobile, and QA.

Own and ship frontend features end-to-end with a product mindset: onboarding, activation, dashboards, and billing UI. Build AI-first experiences, instrument features (analytics, events, dashboards), run A/B experiments, collaborate with backend and cross-functional teams, mentor engineers, and maintain clean, well-tested React code.

Design and implement high-performance, data-rich frontend features using React and TypeScript. Co-own frontend architecture, component design, and state management. Collaborate with product, design, and backend teams to improve data visualization and user diagnostics. Ship production code quickly, leverage AI tools to accelerate development, and mentor engineers while promoting frontend best practices and testing.

Serve as a senior Java full-stack engineer building and maintaining backend services for blockchain applications, integrate APIs with React/Vue frontends, design scalable enterprise blockchain solutions, troubleshoot complex backend issues, and collaborate with cross-functional teams to apply best practices.

The role involves building creative tools for content editing, enhancing features with PixiJS and WebGL, and improving collaboration workflows.

Own and evolve Synthesia's shared design system: build high-quality React/TypeScript components, design tokens, Storybook docs, accessibility (WCAG 2.2 AA), theming, localization/RTL, and tooling so both humans and AI agents can reliably consume components across products.

Join Dragonfly's talent network as a Senior Frontend Engineer. Connect with global portfolio companies in the crypto ecosystem.

Build and ship full-stack features for North, develop autonomous agents that access sensitive enterprise data, productionize state-of-the-art models, write minimal, secure low-resource code, and collaborate with researchers to deploy performant RAG/agentic applications while prioritizing security and user experience.

The Front End Developer will design and implement features, take ownership of projects, and contribute to backend tasks as needed while optimizing performance and scaling UI design.

Build and optimize user-facing features and reusable React components, translate UI/UX into code, collaborate on tests with QA, document technical decisions, and demo products to stakeholders.

Design and implement complex customer-facing frontend features using TypeScript and React. Provide technical leadership, mentor junior engineers, drive frontend architecture and best practices, improve performance and accessibility, partner with product/design, integrate with backend APIs, and manage technical debt and scalability.

Build and maintain user-facing features and interfaces for Restream web services. Design and implement UI and business logic, collaborate with product designers and engineers, perform code reviews, improve reliability and scalability, and evaluate emerging technologies.

Lead development of Magento 2 storefronts (custom themes, Hyva, headless/PWA), drive frontend architecture and best practices, optimize performance and accessibility, integrate with REST/GraphQL APIs, mentor engineers, and collaborate with backend, DevOps, and design teams.

Own frontend implementation for enterprise Magento/Adobe Commerce storefronts using Hyva and modern frontend technologies. Build responsive, pixel-perfect UIs from Figma, optimize performance and accessibility, integrate with REST/GraphQL, and collaborate with backend engineers and designers from estimation through deployment.

Frontend-focused product engineer building high-quality SaaS user experiences. Work in cross-functional squads to own UI, interaction patterns, performance, accessibility, prototyping, instrumentation, and feature rollouts. Primary frontend work with openness to backend or mobile tasks, using AI-assisted coding and agile practices.

As a Senior Front-End Software Engineer, you'll design and implement services, contributing to the architecture and product strategy in a fast-paced environment.

Build and maintain scalable frontend components for a SPA, optimize performance and SEO, write tests, follow SOLID/OOP principles, collaborate with Product/Design/Backend, and use modern build pipelines and tooling.

The role involves designing, building, and implementing new services, working closely with the product team, and taking ownership of projects from 0 to 1.

SynergyOS seeks software engineers for backend, frontend, and DevOps roles to build a productivity platform for enterprises, enhancing office workflows.

The Senior Frontend Engineer will optimize and refine existing code, implement UX/UI improvements, and maintain high code quality, working autonomously and collaboratively with designers and engineers.

Design and deliver performant, scalable frontend experiences for a high-traffic global platform. Collaborate in cross-functional squads to implement end-to-end features, participate in architecture decisions, ensure quality through testing and code reviews, mentor teammates, and drive improvements in observability, scalability, and developer experience.

As a Frontend Engineer, you will build and enhance frontend solutions for financial configurations, develop internal tools, and create customer-facing interfaces, ensuring high performance and quality in financial applications.

Own frontend features end-to-end for a React/TypeScript application: design, prototype, build, test, and maintain accessible, mobile-responsive, performant UI using SWR and styled-components while collaborating with product, design, and backend teams.

Develop and maintain Ubegos frontend products: mobile/web quest experiences, user and creator dashboards, admin panel, marketing features, and third-party integrations. Work in one-week Scrum sprints, perform code reviews, contribute to software architecture, and use modern frontend frameworks, relational databases, and AI-assisted coding tools.