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Senior Frontend Engineer (React/TypeScript)

KWAN • Portugal
Visa Sponsorship Relocation
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Seeking a Senior Frontend Engineer to develop modern React and TypeScript applications in Lisbon. Key responsibilities include building complex interfaces for fleet management and integrating with REST APIs. Requires 5+ years of advanced React, TypeScript, and modern JavaScript expertise.

Key Highlights
Develop modern, production-ready React and TypeScript applications.
Build complex workflows for fleet management, operational monitoring, and intralogistics.
Integrate frontend applications with backend REST APIs and handle asynchronous data.
Key Responsibilities
Develop modern, production-ready React and TypeScript applications following existing frontend architecture and architectural guidelines.
Transform complex architectural concepts into reusable React components, maintainable interaction patterns, and data-driven interfaces.
Build complex workflows for fleet management, deployment, operational monitoring, and intralogistics.
Integrate frontend applications with backend REST APIs, handling asynchronous data, loading states, error states, data synchronization, and user permissions.
Transform complex, large datasets into intuitive, data-dense interfaces, operational monitoring interfaces, dashboards, KPI visualizations, and analytics views with filtering, aggregation, and drill-down capabilities.
Write high-quality, secure code daily as a hands-on developer, developing complete features independently and debugging browser, frontend, and API integration issues.
Maintain and improve software quality through unit testing, integration testing, end-to-end testing, static analysis, dependency management, code reviews, and refactoring.
Optimize browser rendering, frontend performance, and usability while balancing information density and avoiding technical debt.
Contribute to component-driven development and the team's design system.
Collaborate closely with Product, Backend, DevOps, QA, and Robotics teams within an Agile development environment.
Technical Skills Required
React TypeScript JavaScript
Benefits & Perks
Competitive salary
Awesome benefits
Relocation package
Visa sponsorship
Nice to Have
Tailwind CSS
HTML5
CSS3
Responsive design
Adaptive UI development
Component-driven development
Real-time, high-frequency WebSockets
GraphQL APIs
Frontend state management
Data synchronization
Operational monitoring interfaces
Analytics views
KPI visualizations
Data-dense dashboards
Clean code
Maintainability
Refactoring
Secure coding
Performance optimization
Error handling
Observability
Automated testing practices
Unit testing
Integration testing
End-to-end testing (e.g. Jest/Vitest, Cypress or Playwright)
Modern development tools
Git
Pull requests
CI/CD pipelines
Modern build tools
Package managers
Dependency management
Docker
Containerized development environments
Agile product teams

Job Description

We are looking for a Senior Frontend Engineer in Lisbon who's eager to embark on an exciting new opportunity! :muscle:

:star-struck: About KWAN

We connect IT professionals with projects that match their skills, professional experience, and goals, then we offer a career progression program, delivered by in-house specialists - our People Experience Partners - to guide them through our journey with us.

:rocket: What is this challenge about

• Develop modern, production-ready React and TypeScript applications following existing frontend architecture and architectural guidelines.

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