Senior Frontend developer (Next,React,TypeScript)

Lviv - Ukraine

Monthly Salary: Not Disclosed

Posted on: 30+ days ago

Vacancies: 1 Vacancy

Job Summary

Our client is one of Europes fastest-growing mobile companies with 5 million active customers 1000 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 TypeScript and React.

Responsibilities

Build high-impact 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 scopeReact Query/TanStack Query Redux Toolkit Zustand/Jotai or RSC/server actionswhile 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 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

Required Experience:

Senior IC

Our client is one of Europes fastest-growing mobile companies with 5 million active customers 1000 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...