A

Senior Full-Stack Software Engineer (React/TypeScript) - Founding Engineer Opportunity

a4assist • San Francisco Bay Area
Visa Sponsorship
Apply
AI Summary

Join a fast-growing San Francisco-based consumer tech company as a Senior Full-Stack Engineer to build and launch a web platform from scratch. You’ll own the end-to-end web stack, establish technical standards, and collaborate with backend teams to create scalable, high-quality consumer experiences. Ideal for founders, early hires, or engineers with 0→1 product launch experience.

Key Highlights
High-ownership, 0→1 opportunity to build a consumer web product from the ground up
Establish React/TypeScript standards and frontend architecture for a fast-moving startup
$200K–$400K base salary + competitive equity with on-site work in San Francisco
Open to visa transfers (OPT/H-1B) and requires 5+ years of full-stack experience
Key Responsibilities
Build and launch a consumer web product from the ground up, establishing the full web platform
Own the end-to-end web stack and frontend architecture, setting React/TypeScript standards and best practices
Translate Figma designs into pixel-perfect, responsive production experiences with polished animations and micro-interactions
Collaborate with backend engineers on API design, data models, and performance optimization
Develop and maintain internal tools and dashboards to support product and engineering needs
Technical Skills Required
React TypeScript Full-Stack Web Engineering
Benefits & Perks
$200K–$400K base salary + equity
On-site work in San Francisco
Open to visa transfers (OPT/H-1B)
Nice to Have
Consumer gaming experience
Payments or real-money product experience
Real-time application experience
React Native experience

Job Description


🚀 Senior Fullstack Software Engineer | San Francisco, CA | $200K–$400K + Equity

We’re hiring a Senior Fullstack Software Engineer to help build the web platform for a fast-growing consumer technology company in San Francisco.


This is a high-ownership, 0→1 opportunity. You’ll establish the web platform, set React/TypeScript standards, and bring an existing consumer mobile product to the web.


What you’ll do

• Build and launch a consumer web product from the ground up

• Own the end-to-end web stack and frontend architecture

• Establish React and TypeScript standards and best practices

• Build polished, responsive interfaces with thoughtful motion and micro-interactions

• Translate Figma designs into pixel-perfect production experiences

• Own internal tools and dashboards

• Partner with backend engineers on APIs, data models, and performance

• Help establish the foundation for future web and Android experiences

• Work autonomously in a fast-moving, high-agency startup environment


What we’re looking for

• 5+ years of fullstack web engineering experience

• Deep expertise in React, TypeScript, and modern JavaScript

• Proven experience shipping a 0→1 consumer web product at a startup

• Experience owning frontend architecture/platform standards

• Strong product sense and exceptional attention to UI/UX details

• Experience with animations, motion, responsive design, and pixel-perfect Figma implementation

• Comfortable making decisions and shipping quickly with limited direction

• Strong collaboration with backend engineers on API design and data models


Bonus

• Consumer gaming experience

• Payments or real-money product experience

• Real-time application experience

• React Native experience


🎯 This role is especially suited for founders, founding engineers, early startup hires, or engineers who have taken a consumer product from idea → launch → scale.

Compensation: $200K–$400K + competitive equity

Location: San Francisco, CA

Work arrangement: On-site, 5 days/week

Visa: Open to visa transfers, including OPT/H-1B transfers


If you’ve built and shipped a consumer product from 0→1 and want significant ownership over what comes next, we’d love to hear from you.

📩 Apply with your resume and a brief description of the consumer product you personally helped build and launch.


Similar Jobs

Explore other opportunities that match your interests

Founding Engineer

Programming
•
3h ago
Visa Sponsorship Relocation Remote
Job Type Full-time
Experience Level Entry level

orpex

San Francisco Bay Area
Visa Sponsorship Relocation Remote
Job Type Full-time
Experience Level Mid-Senior level

Goliath Partners

San Francisco Bay Area

Staff Software Engineer, GTM AI Engineering (Claudification)

Programming
•
3d ago

Premium Job

Sign up is free! Login or Sign up to view full details.

•••••• •••••• ••••••
Job Type ••••••
Experience Level ••••••

anthropic

San Francisco Bay Area

Subscribe our newsletter

New Things Will Always Update Regularly