Senior Frontend Engineer

TL;DR

Senior Frontend Engineer (React/TypeScript): Taking ownership of a modern React application, building scalable user interfaces for a globally distributed cloud platform with an accent on integrating frontend systems with backend services via modern API architectures. Focus on optimizing frontend performance, including load time, rendering, and bundle size, and influencing key technical decisions.

Location: Able to work onsite in Lisbon

Salary: €70k–€100k + ESOP

Company

Plexus is partnered with a fast-growing cloud infrastructure company building a large-scale, globally distributed platform used by enterprise customers.

What you will do

• Own and evolve a modern React + TypeScript frontend application, including architecture and technical direction.
• Design and build scalable, high-performance user interfaces for a globally distributed cloud platform.
• Integrate frontend systems with backend services via modern API architectures.
• Establish and improve testing across unit, integration, and end-to-end levels.
• Optimise frontend performance including load time, rendering, and bundle size.
• Contribute to build tooling, CI/CD pipelines, and deployment processes.

Requirements

• Strong experience building applications using React and TypeScript.
• Experience owning or architecting production frontend systems.
• Strong understanding of state management, performance, and frontend architecture.
• Experience integrating with backend APIs and working in cross-functional teams.
• Experience building secure authentication and user flows is beneficial.
• Able to work onsite in Lisbon
• Fluent in English

Benefits

• Work on a globally distributed cloud infrastructure platform.
• High-impact role with real ownership and architectural influence.
• Direct collaboration with senior engineering leadership.
• Strong career progression as the team scales.
• Collaborative, engineering-focused culture.