Senior Frontend React Developer at Luxoft – UA | Jobyssey

Project description
As a Front-end Developer for this project, you will have the opportunity to contribute to industry leading software for our global clients. You will work closely with cross-functional teams and regional experts to design, implement, and support solutions. This is your chance to work on a stable, long-term project with a global client, focusing on digital transformation and change management.

We are looking for a Senior Front-end Developer with 6+ years in frontend application development, with hands-on experience in modern TypeScript frameworks and responsive web design.

The ideal candidate will have strong production experience in React and practical exposure to the other ecosystem. The ideal candidate builds responsive, accessible, secure, and high-performance web applications with modern frontend tooling and TypeScript-first practices. You will work closely with backend, design, and product teams to deliver reliable user experiences across web and mobile browser environments.

Why Join Us?

Exciting Opportunities: Work in squads under our customer's direction, utilizing Agile methodologies and Scrum.
Innovative Application: Contribute to an application that guides and documents the sales order process, aids in market analysis, and ensures competitive pricing.
Workflow Governance: Be part of a team that integrates digital and human approvals, ensuring seamless integration with a broader ecosystem of applications.
Global Exposure: Collaborate with reputed global clients, delivering top-notch solutions.
Career Growth: Join high-caliber project teams with front-end, back-end, and database developers, offering ample opportunities to learn, grow, and advance your career.

If you have strong technical skills, effective communication abilities, and a commitment to quality, we want you on our team!

Ready to make an impact? Apply now and be part of our journey to success!

Responsibilities
Develop and maintain responsive web applications using a primary framework (React) in production environments
Build reusable, well-documented UI components following design system guidelines
Collaborate with UX/UI designers to translate wireframes and mockups into functional interfaces
Integrate frontend applications with backend APIs (REST, GraphQL)
Optimize application performance, accessibility, and Core Web Vitals scores
Write and maintain unit, component, and end-to-end tests to ensure code quality
Implement and maintain CI/CD pipelines for frontend build, test, and deployment
Monitor frontend health through logs, metrics, and user-experience telemetry
Resolve defects and production issues within agreed service levels and quality standards
Participate in code reviews, technical discussions, and architecture decisions
Contribute to the evolution of the team's frontend standards, tooling, and best practices
Troubleshoot production issues and contribute to incident resolution
Stay current with emerging frontend technologies, frameworks, and browser capabilities

Skills
Must have
Years of Experience:
6+ years in frontend application development, with hands-on experience in modern TypeScript frameworks (React) and responsive web design.
Core Frontend Development
Strong proficiency in HTML5, CSS3, JavaScript (ES6+), and TypeScript
Experience with strict TypeScript settings, typed API contracts, and maintainable code patterns
Strong understanding of modern browser APIs and web platform capabilities
Deep understanding of responsive design, cross-browser compatibility, and mobile-first development
Experience with component-based architecture and design systems
Familiarity with Web Components and Shadow DOM
Understanding of frontend security fundamentals (XSS prevention, CSP, secure token handling)
Framework Specialization
Strong production experience in React
Practical working knowledge of the secondary framework for maintenance and collaboration
Ability to evaluate trade-offs for rendering strategy, state management, and component architecture
React
Hands-on experience with recent React versions (hooks, concurrent rendering, server
components)
Proficiency in React Router, Context API, and client-server rendering patterns
Experience with state management using Redux Toolkit, Zustand, or Jotai
Understanding of Next.js or Remix for SSR, SSG, and hybrid rendering
Familiarity with component libraries such as MUI, Ant Design, or shadcn/ui
Ability to build and test reusable components in shared UI libraries
Styling & UI
Proficiency in CSS preprocessors (SASS/SCSS) and CSS-in-JS solutions (Styled Components, Emotion)
Experience with utility-first CSS frameworks (Tailwind CSS)
Understanding of design tokens, theming, and dark mode implementation
Familiarity with Figma-to-code workflows and design handoff practices
Experience documenting components with Storybook or equivalent tools
Build Tools & Bundlers
Experience with modern build tools (Vite, esbuild, Webpack, or Rspack)
Understanding of tree-shaking, code splitting, and lazy loading
Familiarity with monorepo tools (Nx, Turborepo, or pnpm workspaces) for multi-app setups
Working knowledge of linting and formatting standards (ESLint, Prettier)

Nice to have
Testing
Experience with unit testing frameworks (Vitest, Jest, Jasmine)
Hands-on experience with component testing (React Testing Library, Angular Testing Library)
Familiarity with end-to-end testing tools (Cypress, Playwright)
Experience with API mocking and test fixtures (MSW or equivalent)
Understanding of visual regression testing (Chromatic, Percy)
Performance Optimization
Experience with Core Web Vitals optimization (LCP, INP, CLS)
Understanding of image optimization, font loading strategies, and critical CSS
Familiarity with Lighthouse, WebPageTest, and browser DevTools performance profiling
Accessibility (a11y)
Understanding of WCAG 2.2 AA guidelines and ARIA attributes
Experience with accessibility testing tools (axe, Lighthouse a11y audit)
API Integration
Experience consuming RESTful APIs and GraphQL endpoints
Understanding of data fetching patterns (SWR, React Query / TanStack Query, Apollo Client)
Familiarity with WebSocket and Server-Sent Events (SSE) for real-time features
Understanding of resilient frontend patterns (retry, timeout, and graceful error states)
DevOps & Deployment
Experience with CI/CD pipelines for frontend builds (GitLab CI, GitHub Actions, Azure DevOps)
Understanding of containerized frontend deployments (Docker, Nginx, S3 + CDN)
Familiarity with feature flags, A/B testing frameworks, and environment-based configuration
Engineering Practices
Experience with Git-based workflows, pull request reviews, and trunk-based development practices
Familiarity with semantic versioning, changelog discipline, and release hygiene
Understanding of observability for frontend applications (error monitoring, RUM, telemetry)
Practical use of AI-assisted coding tools with code quality and security review discipline
Ability to break down UI work into estimable tasks and deliver within sprint commitments
Soft Skills
Strong eye for UI detail and design consistency
Good communication and collaboration skills
Comfortable working in an agile development environment
Ability to translate design mockups into pixel-perfect implementations

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