Frontend Engineer - Portugal

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

Frontend Engineer (React + TypeScript) — Freelance | Hybrid Porto or Lisbon | EV Tech

We\'re hiring a Senior Frontend Engineer to join a fast-growing EV charging scale-up building user-facing platforms that power thousands of chargers across Europe. You\'ll own complex web apps that drive core business workflows: authentication, payments, charger management.

This is a freelance role through Shakers, the platform connecting top tech freelancers with high-impact projects across Europe. We handle contracting, payments and admin so you focus on shipping.

What you\'ll do

• 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

Must-have

• 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)

Why this project

You\'ll ship features that real users touch every day across a European EV network growing at scale. High autonomy, strong product/design partners, and a stack built for speed and reliability.