Senior Frontend developer (Next,React,TypeScript) (#4118)

Описание

Work type: Office/Remote Technical Level: Senior Job Category: Software Development Project: Lebara

Our client is one of Europe's fastest-growing mobile companies with 5 million active customers, 1,000 employees worldwide, and operations in five countries. The client is using the mobile virtual network operator business model.

We are looking for a Senior Front End result-oriented developer who has good knowledge and experience of Next.js, TypeScript and React.

Responsibilities

Build high-impact Next.js features: apply ISR, SSR, SSG, route segment config, middleware, and edge functions to balance performance, freshness, and SEO. Own a design library: create accessible, themeable primitives (tokens, typography, spacing, color) and higher-level components; publish as a versioned package for multiple apps. Heavy shadcn/ui usage: extend and harden shadcn components; extract shared primitives; align with design tokens and Tailwind; enforce accessibility (ARIA) and robust API surfaces. Microfrontends at scale: design integration boundaries (routing, shared deps, contracts); use Module Federation or package-based composition/monorepo tooling; manage versioning and changelogs. State management: choose the right tool per scope—React Query/TanStack Query, Redux Toolkit, Zustand/Jotai, or RSC/server actions—while minimizing client state. Storybook-first delivery: document components with MDX; set up controls, a11y tests, interaction tests, and (optionally) visual regression. Performance & UX polish: optimize web vitals (LCP/CLS/INP), code-split routes, tune caching headers, image optimization, and streaming UI; add robust error/fallback states. Containerized dev: craft efficient multi-stage Docker images; run full app + deps via docker-compose; contribute to CI checks and preview environments. Quality & reliability: write unit/integration/e2e tests (Testing Library, Jest/Vitest, Playwright/Cypress); enforce lint/type rules; add feature flags and telemetry (logs/metrics/errors). Cross-functional collaboration: partner with design on Figma handoff, review PRs, lead design docs/tech spikes, and mentor other engineers.

Requirements

5+ years building production web UIs; 3+ years with Next.js + TypeScript. Deep knowledge of ISR/SSR/SSG, App Router, RSC, server actions, caching strategies, and SEO fundamentals. Proven experience shipping and maintaining a component library/design system (tokens, theming, versioning, changelogs). Significant hands-on work with shadcn/ui and Tailwind, extending components and creating custom, accessible primitives. Comfortable with microfrontends: architecture, Module Federation (or package-based MFE), shared dependency strategy, and release workflows. Strong Docker and docker-compose skills for local dev and service integration. Solid testing practice across unit/integration. Performance mindset with practical web-vitals tuning and profiling. Excellent communication, ownership, and mentorship.

Nice to have

Experience with monorepos (Nx/Turborepo), package publishing, and semver discipline. Analytics/experimentation (A/B testing), feature flags, and progressive rollout. Familiarity with headless CMS/e-commerce, and API design (REST).

We offer*:

Flexible working format - remote, office-based or flexible A competitive salary and good compensation package Personalized career growth Professional development tools (mentorship program, tech talks and trainings, centers of excellence, and more) Active tech communities with regular knowledge sharing Education reimbursement Memorable anniversary presents Corporate events and team buildings Other location-specific benefits

*not applicable for freelancers