Senior Frontend Engineer - React.JS (Portugal, f / m / d)

YOUR MISSION

We are looking for a highly-skilled Senior Frontend Engineer to join one of our development teams. In this role, you will be responsible for developing and implementing user interface components using React.js with technologies such as TypeScript, GraphQL, Jest, Cypress, and Vite. You will also test, profile, and improve front-end performance, document our front-end codebase, mentor team members, plan tasks, and estimate workloads.

You'll work within a cross-disciplinary team under the Engineering Manager to contribute to our multi-tenant SaaS product. This is a high-impact role for someone who thrives on elevating engineering standards and driving a forward-thinking, AI-first approach across the organization.

To succeed as a senior frontend engineer, you should have in-depth knowledge of React concepts, excellent front-end coding skills, and a strong understanding of progressive web applications. Ultimately, you should be able to design, plan, and build modern user interface components to enhance application performance and mentor others to do the same.

YOUR PROFILE

6+ years of professional experience in a similar position

Proven expertise in TypeScript, JavaScript, CSS, HTML, and front-end technologies

A quality-focused mindset and passion for user experience and interfaces

An AI-first mindset, embedding AI and automation into product architecture, workflows, and decision-making

Solid knowledge of frontend tools including React.js, Vite, Jest, and Cypress.js

Experience with browser-based debugging and performance testing software

Familiarity with git, npm, Docker, and Jira

Excellent troubleshooting skills

Good project management skills

Experience mentoring teammates respectfully and empathetically

YOUR RESPONSIBILITIES

Meet with the development team to discuss UI ideas and applications

Review application requirements and interface designs

Identify web-based user interactions

Develop and implement responsive UI components using React concepts

Write interface code using TypeScript following React workflows

Troubleshoot and debug interface software and application codes

Develop front-end architecture supporting UI concepts

Provide automated unit, e2e, and visual regression tests

Monitor and improve front-end performance

Document application changes and updates

Participate in code and technical design reviews

Estimate workloads and review tasks

Mentor team members

WHY US?

Factor Eleven's tech department is an in-house startup responsible for our SaaS product suite that offers localized digital advertising to enterprises of all sizes. We power the engine of Factor Eleven and aim to elevate our product daily. We are committed to quality, expanding our platform's capabilities, and fostering a collaborative engineering environment.

Join our remote team to help move digital localized advertising forward, enjoying camaraderie and perks of fully remote work.

OUR PERKS & BENEFITS

Transparent, above-market salaries

100% remote within Europe

Clear expectations and regular feedback

Flexible work hours and part-time options

Be part of a fast-growing, skilled team

Relocation and visa support

In-person events

Home office, co-working space, and work-together allowance

Personal and professional development fund

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