Senior Frontend Engineer - React.JS

Position: Senior Frontend Engineer - React.JS f / m / d)
YOUR MISSIONWe 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 Type Script, Graph

QL, Jest, Cypress and Vite, as we build the future of AI-powered digital advertising. You will also be responsible for testing, profiling and improving front-end performance and documenting our front-end codebase, and mentoring your team-mates, planning tasks and estimating workloads.

You'll be working 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 ensure success as a senior frontend engineer, you should have in-depth knowledge of React concepts, excellent front-end coding skills, and a great understanding of progressive web applications. Ultimately, a top-class Senior Frontend Engineer should be able to design, plan and build modern user interface components to enhance application performance and coach other team-mates to achieve the same.

YOUR PROFILE6+ years of professional experience in similar positions

Product-minded engineer who understands how frontend decisions impact user experience, business metrics, and product strategy

Hands-on coder who thrives in a strong IC role, writing production code daily

Expert-level proficiency in Type Script, React, CSS, and Git Exceptional code reviewer with the ability to lead technical discussions in a professional, polite, and constructive manner

Deep expertise in micro-frontends architecture and ability to design scalable solutions enabling fast, independent deployments

Familiar with monorepo strategies

Experience with modern build tools (Vite) and Graph

QLStrong knowledge of Jest or Vitest, Cypress (nice to have)
Proven experience with state management libraries Redux or Zustand Expert understanding of performance optimizations, ideally with Core Web Vitals metrics

Solid grasp of CI / CD pipelines and Git release strategies

Familiarity with AI coding assistants (Cursor / Claude) to boost productivity

Quality-focused mindset with deep passion for user experience

Strong troubleshooting and debugging skills

Excellent communication skills with an empathic, respectful approach to collaboration

Requirements

YOUR RESPONSIBILITIES Write production-grade code daily as a hands-on Individual Contributor Architect and implement micro-frontend solutions supporting independent team deployments

Lead code review discussions , providing constructive feedback that shapes team best practices and engineering mindset

Guide technical decision-making through professional, diplomatic communication

Make strategic frontend architecture decisions that align with the product roadmap and business objectives

Develop highly responsive user interface components using React and Type Script Design  and maintain monorepo / micro-frontend infrastructure for scalable frontend architecture

Write and maintain automated unit, e2e, and visual regression tests with a zero-bug mindset

Monitor, profile, and optimize frontend performance against Core Web Vitals Facilitate technical design discussions and architecture reviews

Document application architecture, changes, and best practices

Collaborate within SCRUM workflow , writing and estimating tasks independently

Mentor team members on frontend architecture, code quality, and professional development practices

Leverage AI coding tools to accelerate development and maintain high code quality

WHY US?

Factor Eleven's tech department is an inhouse tech start-up / scale-up and responsible for our saas product suite offering localized digital advertising to enterprises of all sizes and shapes. We're powering the engine that Factor Eleven is successfully built upon and elevate the possibilities of our product on a daily basis. We're fulfilling our ambitions as a top ad-tech provider by continuously leveling up the quality and expanding capabilities of the entire platform, as well as our engineering and product organization.

Join our amazing team in our mission to move digital localized advertisement forward and enjoy the freedom, camaraderie and perks of our fully remote operations.

OUR PERKS & BENEFITSTransparent, above-market salaries
100%-remote

Clear expectations and regular feedback

Flexible work-hours

Be part of a fast-growing, highly-skilled Team In person department and company events

Home office, co-working space allowance

Personal and professional development fund
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