Senior Frontend Developer (JavaScript, React & Native iOS Mobile)

Webellian is a Digital Transformation and IT consulting company working across sectors such as insurance, banking, healthcare, retail, and manufacturing, focusing on innovative and disruptive technologies and supporting clients in realizing their vision and strategy.

• 6+ years professional frontend development experience with scalable production applications.
• Expert-level proficiency in JavaScript and TypeScript, including async patterns, module systems, and type-safe design.
• Expert-level React skills: hooks, context, state management (e.g., Redux Toolkit, Zustand), performance patterns, and large-scale components.
• Strong native iOS development skills with Swift and SwiftUI; experience with UIKit is a plus.
• Solid experience with iOS-specific features like push notifications, background processing, Keychain, deep linking, and App Store guidelines.
• Experience with frontend REST API integrations including authentication protocols (OAuth2, JWT), error handling, and caching.
• Strong CSS and layout skills: responsive design, CSS-in-JS (e.g., Styled Components, Emotion), or utility frameworks like Tailwind CSS.
• Experience with frontend build tools: Vite, Webpack, or equivalent, including bundling, tree-shaking, and optimizations.
• Hands-on daily use of Claude Code for development, debugging, refactoring, and documentation.
• Proven ability to define architecture, set standards, and lead technical decisions in a senior or tech lead role.
• Strong communication skills for collaboration within global, distributed teams including designers, product managers, and backend engineers.

• Architect and build production-grade React web applications including component design, state management, routing, performance optimization, and WCAG accessibility compliance.
• Develop native iOS applications using Swift and SwiftUI or UIKit for App Store-ready mobile experiences.
• Define and enforce frontend architecture standards: folder structure, component libraries, design system integration, and code quality.
• Integrate frontend applications with REST APIs and event-driven backends handling authentication, error boundaries, loading states, and real-time data.
• Implement frontend testing strategies including unit tests (Jest, Vitest), component tests (React Testing Library), end-to-end tests (Playwright, Cypress), and iOS XCTest suites.
• Lead frontend performance engineering: bundle optimization, lazy loading, rendering strategies (SSR, CSR, ISR), Core Web Vitals, and iOS app profiling.
• Manage iOS mobile development lifecycle from Xcode configuration through TestFlight and App Store submission.
• Collaborate with UX Designers to create responsive and accessible web and iOS interfaces.
• Utilize Claude Code actively for prototyping, code review, refactoring, and documentation.
• Conduct code reviews, contribute to architectural decision records, and mentor junior and mid-level frontend engineers.
• Work with DevOps to integrate frontend build and deployment into CI/CD pipelines including iOS build automation with Fastlane and release management.