Senior Programmer to System Analyst, Frontend - React

Key Responsibilities

• Frontend Architecture: Design and build modular, responsive, and maintainable user interfaces using React.js, TypeScript, and RxJS / RxReact.
• Reactive State Management: Handle complex asynchronous data flows, event streams, and real-time state updates using RxJS Observables and reactive state patterns.
• API Integration: Integrate frontend modules with backend REST and WebSocket APIs, ensuring efficient caching, error handling, and latency minimization.
• UI/UX Excellence: Work closely with UI/UX designers to translate wireframes and design systems (Figma/Adobe XD) into pixel-perfect frontend code.
• Performance Optimization: Diagnose and fix performance bottlenecks (rendering cycles, bundle size reduction, memory leaks, DOM optimization).
• Code Quality: Write comprehensive unit and integration tests (Jest, React Testing Library) and participate in peer code reviews.

Requirements & Qualifications

Technical Skills:

• 3+ years of hands-on experience in modern frontend development.
• Deep proficiency in React.js (Hooks, Context API, Custom Hooks, Functional Components).
• Strong, practical knowledge of RxJS and reactive programming concepts (Observables, Subjects, Pipeable Operators, Memory Management/Unsubscribing).
• Expertise in TypeScript, HTML5, modern CSS/Sass, and responsive design systems.
• Experience with state management frameworks using or combining RxJS (e.g., RxReact, Redux-Observable, or custom Observable stores).
• Familiarity with RESTful APIs, WebSockets, and asynchronous request handling.
• Experience with modern build tools and bundle managers (Vite, Webpack, npm/pnpm).

Soft Skills:

• Strong problem-solving mindset with attention to detail for UI precision and user experience.
• Good communication and collaboration skills in an Agile/Scrum team environment.
• Passion for writing clean, self-documenting, and maintainable code.

Nice-to-Haves

• Experience with WebSockets / Server-Sent Events (SSE) for real-time data dashboards.
• Knowledge of web performance profiling tools (Chrome DevTools Lighthouse, React Profiler).
• Familiarity with CI/CD deployment pipelines for frontend assets (AWS CloudFront, S3, Vercel).