Top Front End Developer Jobs in Leon

Build and maintain responsive, accessible web interfaces for a consumer health platform using React and TypeScript. Translate designs into performant UI, create reusable components, integrate REST/GraphQL APIs, collaborate with product/design/backend teams, participate in code reviews, and optimize frontend performance across devices and browsers.

The Senior Front-End Developer will lead technical projects, develop robust front-end applications using React and Angular, and collaborate with teams to ensure integration and quality standards.

The Frontend Developer will replace components, optimize UI workflows, collaborate with backend teams, and improve development processes.

Develops and maintains frontend web pages, portals, templates, trackers, presentations, and web-based programs for agent, employee, and customer websites. Translates Figma and Photoshop designs into HTML and CSS, uses C#, CMS platforms, Visual Studio, GitHub, and CI/CD practices, performs unit testing, optimizes user experiences, collaborates cross-functionally, and coordinates with vendors.

The Software Engineer will design and maintain payment processing systems, mentor other engineers, and ensure security in client transactions within the crypto ecosystem.

Senior UI developer responsible for designing and building responsive React-based UIs and dashboards for cybersecurity analytics. Develop backend services and APIs in Python, integrate security data sources, optimize SQL Server/PostgreSQL reporting, collaborate with stakeholders, influence architecture, and mentor junior developers.

Lead the Pro team to design, develop, and deliver frontend systems for Kraken's trading interface, focusing on user experience and mentoring engineers.

Design and implement developer-facing UI from Figma to production using Hotwire (Turbo + Stimulus) and ViewComponents. Own the dashboard, API playgrounds, docs, marketing site, and data visualization. Optimize performance and bundle size, maintain a coherent component system, and ship polished, production-ready front-end with tests and CI/CD.

Lead front-end design and implementation of scalable enterprise web applications using React and TypeScript. Build component-driven UIs, integrate with Azure-hosted APIs, implement state management and client-side caching, and deliver automated UI tests. Collaborate with distributed Agile teams and apply generative AI/LLM concepts for AI-assisted user experiences.

Lead design and implementation of scalable enterprise web applications using React and TypeScript. Build component libraries, integrate with Azure-hosted APIs, implement state management and automated UI tests, and apply generative AI/LLM features and best practices in front-end architecture within Agile, distributed teams.

Lead front-end design and development of scalable enterprise web applications using React and TypeScript. Architect component-driven UIs, implement state management, client-side caching, automated UI testing, and integrate with Azure-hosted APIs. Collaborate with Agile, distributed engineering and product teams and apply modern AI/LLM concepts for AI-assisted user experiences.

Design, develop, and maintain large-scale Angular applications using NGRX and RxJS. Implement best practices for performance, responsiveness, and cross-browser support. Integrate with backend RESTful APIs, participate in code reviews, mentor junior developers, and write clean, testable code.

Build and launch conversion-focused landing pages, advertorials, and funnels for DTC brands. Run rapid experiments and A/B tests, implement analytics/tracking (GA4, GTM, Hotjar), optimize mobile performance and page speed, collaborate with paid media and creative teams, assist with direct-response copy, and create scalable processes for faster launches.

Lead frontend architecture for Clara Builders (Next.js 15, React, TypeScript), extend backend/infra (Prisma/Postgres, deploy pipeline), work on the Cloudflare AI Gateway and agent infrastructure (Figma-to-code MCP, documentation agents, n8n automations), design and ship new AI tooling (OAuth clients, unified access), and raise technical standards across the pod through ownership and code review.

Design and maintain secure, highly available Java/Spring Boot backend services for payments, optimize asynchronous transaction processing, integrate with payment networks, build React frontends and internal tools, apply AI to accelerate engineering workflows, mentor engineers, and implement observability and CI/CD.

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.