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

Visa sponsorship available

Competitive compensation and equity

Medical, dental, and vision coverage

Job summary

Emerald Advantage Concepts LLC in Redwood City, CA is seeking a Senior Frontend Engineer to design and deliver high-performance React applications. You will own features end-to-end, collaborate with backend engineers, and ship dashboards and analytics tools for enterprise customers.

Ideal candidates have 3–7 years of frontend experience, expert React/TypeScript skills, and production Node.js exposure in a fast-growing startup environment with equity opportunities.

Qualifications

• 3–7 years of professional frontend engineering experience.

Responsibilities

• Design and build high-performance frontend applications using React and TypeScript.

Skills

React

TypeScript

Node.js

Frontend engineering

Production quality code

Startup experience

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.