Senior Frontend Engineer (ReactJS, NextJS)

Key Principles & Our "Real Frontend" PhilosophyWhat Makes Us Different Don't test UI components directly in complex ways → test business logic and important user interactions Test only what should be tested → functions must work, not every component needs tests Don't over-abstract unnecessarily → if your logic is separated well enough, you can maintain it Use real API calls for integration testing → instead of mocking everything Frontend Architecture We LoveSeparate components into 3 clear types:o UI Components → reusable, no business logic, pure presentationo Feature Components → business logic, data fetching, state managemento Layout Components → page structure, navigation, common layouts Clear state management → local state vs global state vs server state Consistent error handling → error boundaries, fallback UI, retry mechanisms Analytics Architecture We Want Event-driven Design → every user interaction must have meaningful event Parameter Consistency → use same naming convention throughout system Cross-session Persistence → UTM and campaign data must persist across sessions Performance Monitoring → track Core Web Vitals and custom performance metrics Error Tracking Integration → js_error, api_error must go to analytics and error monitoring Anti-patterns We Reject🚫 What We Don't Want to See Write unnecessarily complex code / over-abstract Don't separate concern / logic / UI / data Use Hooks for everything until you can't understand Use Zod but don't actually validate / or just use isString Write TypeScript with any everywhere / don't use type safety Convert Figma inaccurately / just do "similar" Use Zustand with stores too big to control Write Tailwind until class name is 4 lines long (should use @apply, component class) Fire Analytics Events without system — no naming convention, no parameter consistency Don't store UTM persistence — just read from URL and throw away Don't track complete user journey — just track page view, not interactions Tech Stack We Actually Use (No Bloat)Core Frontend:-Next.js (App Router, Server Components, Server Actions)-React 18+ (Concurrent Features, Suspense)-TypeScript (Strict mode, advanced types, type-safe APIs, branded types)-Tailwind CSS (Utility-first, custom design system)State Management & Data Fetching:-TanStack Query (React Query v5) — server state management-Zustand — client state management-Zod — schema validation and type inferenceAnalytics & Tracking:-Google Analytics 4 — comprehensive event tracking-Google Tag Manager — tag management and custom events-Custom Analytics SDK — type-safe event tracking with TypeScript, strongly-typed event parameters-UTM Persistence Library — cross-session campaign tracking-Performance Monitoring — Core Web Vitals trackingUI & Animation:-Framer Motion — animations and transitions-Radix UI / Headless UI — accessible component primitives-React Hook Form — form handling and validationDevelopment & Testing:-ESLint + Prettier — code quality and formatting-Jest + React Testing Library — unit and integration testing-Playwright / Cypress — end-to-end testing-Storybook — component development and documentationInfrastructure & DevOps:-Vercel / Netlify — deployment and hosting-GitHub Actions — CI/CD pipelines-Google Cloud Platform — backend services-Sentry — error tracking and monitoringWhy You'll Love Working Here💰 Be Part of Something Real Build real things, used by real people, with real users — not just concepts Grow fast with biannual performance reviews and real ownership of your work Salary increases based on your growth — not years of experience or politics 🌟 Learn from World-Class People Write clean code with real code reviews, not just approval passes Learn from mentors who understand both theory and practice of Frontend No toxic people, no politics — just passionate developers who want to build great things ⚡ Work Environment That Actually Works Flexible working hours — we measure output, not hours Office-based collaboration — work together in our office environment No micromanagement — we trust you to deliver results UX/UI ready for you — Dev just "Focus on Logic and Quality" Clear guidelines on what to do and what not to do Fast iteration cycles — see your code in production quickly 🎯 What We Value in People Can read documentation independently — no hand-holding needed Ask thoughtful questions — you think before you ask Take feedback without getting emotional — you understand code can always improve Love learning and growing — you want to become better every day Have fighting spirit — you don't give up when things get challenging Deliver more than expected — you surprise us in good ways