Senior Frontend Engineer (React)

Emerald Advantage Concepts LLC; Redwood City (CA); On-site; USD 200,000 - 300,000; Full time

Benefits offered by this job

Competitive compensation

Meaningful equity

Medical, dental, vision coverage

Visa sponsorship

Job summary

Emerald Advantage Concepts LLC in Redwood City, CA, is seeking a Senior Frontend Engineer to join a fast-growing AI startup. You’ll own frontend features end-to-end, work with React/TypeScript, and collaborate closely with backend engineers to craft high-quality user experiences.

You’ll partner with the founders to shape product direction, build dashboards and AI interfaces, and contribute to frontend architecture in a high-ownership environment.

Qualifications

• 3–7 years of professional frontend engineering experience.
• Expert-level React development experience.
• Strong production experience with TypeScript.
• Experience with Node.js in production environments.
• Bachelor’s degree in Computer Science or a related technical discipline.
• Experience working at a high-growth startup or well-known technology company.
• Ability to write clean, production-quality React code without relying on AI-generated solutions.

Responsibilities

• Design and build high-performance frontend applications using React and TypeScript.
• Own frontend features from architecture through deployment.
• Develop dashboards, analytics tools, customer portals, and AI workflow interfaces.
• Collaborate closely with backend and full-stack engineers to deliver exceptional user experiences.
• Work directly with customers to solve real-world problems and continuously improve the platform.
• Help shape frontend architecture and engineering best practices in a fast-moving startup environment.

Skills

React

TypeScript

Node.js

Education

Bachelor's degree in Computer Science or related field

Job description

Location: Redwood City, CA (Onsite — 5 Days per Week)

Build the Future of Voice AI

Emerald Advantage Concepts is partnering with one of the fastest-growing AI companies in the world to hire an exceptional Senior Frontend Engineer .

Our client is transforming how businesses use conversational AI by building a next-generation voice automation platform used by thousands of organizations. Backed by Y Combinator and leading venture investors, the company has experienced explosive growth and is recognized as one of the top AI startups in the industry.

This is an opportunity to join a small, high-performing engineering team where you’ll own products from concept to production, work directly with the founders and CTO, and help shape the future of enterprise AI.

If you’re passionate about building world-class user experiences with React and enjoy solving complex engineering challenges, we’d love to connect with you.

What You’ll Do

• Design and build high-performance frontend applications using React and TypeScript.
• Own frontend features from architecture through deployment.
• Develop dashboards, analytics tools, customer portals, and AI workflow interfaces.
• Collaborate closely with backend and full-stack engineers to deliver exceptional user experiences.
• Work directly with customers to solve real-world problems and continuously improve the platform.
• Help shape frontend architecture and engineering best practices in a fast-moving startup environment.

What We’re Looking For

Required Qualifications

• 3–7 years of professional frontend engineering experience.
• Expert-level React development experience.
• Strong production experience with TypeScript.
• Experience with Node.js in production environments.
• Bachelor’s degree in Computer Science or a related technical discipline.
• Experience working at a high-growth startup or well-known technology company.
• Ability to write clean, production-quality React code without relying on AI-generated solutions.

Preferred Background Candidates from companies such as:

• TikTok
• Coinbase
• Stripe
• Airbnb
• DoorDash
• Salesforce
• NVIDIA
• Postman
• Brex
• Faire
• Gusto
• Other high-growth startups or YC-backed companies

Why You’ll Love This Opportunity

• Join one of the fastest-growing AI companies in the market.
• Work directly with the CTO and founding engineering team.
• High ownership with the opportunity to influence product direction.
• Competitive compensation ($200K–$300K) plus meaningful equity.
• Comprehensive medical, dental, and vision coverage.
• Visa sponsorship available for qualified candidates.
• Build products used by thousands of enterprise customers worldwide.

Candidate Representation Notice

Emerald Advantage Concepts is committed to representing our candidates professionally throughout the hiring process.

By applying through Emerald Advantage Concepts, you authorize us to represent you for this specific opportunity. To help protect your candidacy and avoid duplicate submissions—which may affect an employer’s ability to consider your application,we ask that you do not apply directly or through another recruiting agency for this same position after authorizing us to represent you.

If you have already applied for this opportunity or have been contacted by another recruiter regarding this role, please notify us before we submit your application so we can determine the best path forward.

We look forward to helping you navigate the interview process and presenting your experience in the strongest possible way.