Senior Frontend Engineer - React + TS (Freelance, EV)

Shakers; Lisboa; Híbrido; EUR 83 000 - 138 000; Tempo parcial

Resumo da oferta

Shakers is hiring a Senior Frontend Engineer (React + TypeScript) on a freelance basis to join a fast-growing EV charging scale-up. You will own complex web apps powering thousands of chargers across Europe, focusing on authentication, payments and charger management.

Based in Europe, this hybrid role lets you work from Porto or Lisbon with flexibility. You will collaborate with product, design and backend teams, ship robust features with a strong emphasis on testing, performance and

Qualificações

• 3-6 years building production-grade frontend apps.
• Strong React 18+ and TypeScript.
• Hands-on with TanStack Query, TanStack Router, React Hook Form.
• Solid testing chops: Jest/Vitest + Cypress/Playwright.
• gRPC/REST integration with microservices.
• Observability mindset (Sentry or similar).

Responsabilidades

• Build and scale sophisticated React 18+ apps in TypeScript.
• Own end-to-end user journeys (auth, payments, charger flows).
• Influence frontend architecture decisions: state, routing, performance, observability.
• Integrate with microservices via gRPC/REST.
• Champion testing, monitoring (Sentry) and CI/CD best practices.
• Collaborate closely with product, design, backend and ops.

Conhecimentos

React 18+

TypeScript

TanStack Query

TanStack Router

React Hook Form

Jest/Vitest

Cypress/Playwright

gRPC/REST

Sentry

CI/CD

Descrição da oferta de emprego

Shakers is hiring a Senior Frontend Engineer (React + TypeScript) on a freelance basis to join a fast-growing EV charging scale-up. You will own complex web apps powering thousands of chargers across Europe, focusing on authentication, payments and charger management.

Based in Europe, this hybrid role lets you work from Porto or Lisbon with flexibility. You will collaborate with product, design and backend teams, ship robust features with a strong emphasis on testing, performance and