Frontend Engineer - Component Library

Sperton Global AS

United States

On-site

USD 185,000 - 225,000

Full time

11 days ago

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Benefits offered by this job

Competitive equity package

Direct work with founding engineering팀

High ownership and autonomy

Fast interview process

Well-funded early-stage startup

Job summary

Sperton Global AS is seeking a Frontend Engineer in Downtown San Francisco to build and maintain a public React component library used by customers in their own applications.

You will create reusable UI components with robust theming, accessibility, and performance characteristics, collaborating with backend, product, and design teams in a fast-paced startup environment.

Qualifications

2-7 years of professional frontend engineering experience.
Strong production experience with React and TypeScript.
Experience building reusable component libraries, design systems, SDKs, or embeddable UI products.
Strong understanding of component architecture, styling systems, state management, accessibility, and frontend performance.
Experience working on high-performing product engineering teams.
Meaningful full-time US-based software engineering experience.
Ability to work onsite in Downtown San Francisco five days per week.

Responsibilities

Build and maintain their public React component library published through NPM.
Design reusable, scalable UI components consumed by external engineering teams.
Develop highly configurable frontend components supporting branding, theming, and customization.
Own frontend projects from architecture through production deployment.
Ensure backwards compatibility across releases while maintaining a high-quality developer experience.
Collaborate closely with backend engineers, product, and design in a fast-paced startup environment.
Write clean, maintainable, well-tested TypeScript code.
Improve performance, accessibility, and developer experience across the frontend platform.

Skills

React

TypeScript

Frontend engineering

Component libraries

Design systems

Accessibility

Performance

State management

On-site at San Francisco

Tools

Storybook

SCSS

Testing frameworks

Frontend tooling

NPM

Job description

Frontend Engineer

Location: Downtown San Francisco, California (5 days/week onsite)

Employment Type: Full-time

Compensation: $185,000 - $225,000 Base + Competitive Equity

About The Client

We are building embedded accounting software and AI-powered bookkeeping infrastructure for small businesses.

Instead of asking businesses to switch accounting platforms, they enables vertical SaaS platforms and fintech companies to embed accounting directly into their own products through APIs and embeddable UI components.

Backed by Better Tomorrow Ventures and Emergence Capital, they have raised over $9M in funding and is building with a lean team of engineers focused on shipping high-quality products with significant ownership.

About the Role

They are looking for a Frontend Engineer to help build and maintain the company's public React component library that customers integrate directly into their own applications.

Unlike traditional frontend roles focused on building websites, this position centers around creating reusable, highly customizable UI components that other engineering teams rely on in production.

You'll work closely with the founding engineering team to solve challenging frontend problems around component architecture, styling, customization, backwards compatibility, accessibility, and internationalization.

Responsibilities

Build and maintain their public React component library published through NPM.
Design reusable, scalable UI components consumed by external engineering teams.
Develop highly configurable frontend components supporting branding, theming, and customization.
Own frontend projects from architecture through production deployment.
Ensure backwards compatibility across releases while maintaining a high-quality developer experience.
Collaborate closely with backend engineers, product, and design in a fast-paced startup environment.
Write clean, maintainable, well-tested TypeScript code.
Improve performance, accessibility, and developer experience across the frontend platform.

Required Qualifications

2-7 years of professional frontend engineering experience.
Strong production experience with React and TypeScript.
Experience building reusable component libraries, design systems, SDKs, or embeddable UI products.
Strong understanding of component architecture, styling systems, state management, accessibility, and frontend performance.
Experience working on high-performing product engineering teams.
Meaningful full-time US-based software engineering experience.
Ability to work onsite in Downtown San Francisco five days per week.

Preferred Qualifications

Experience publishing or maintaining NPM packages.
Experience building developer-facing products or SDKs.
Startup experience (Seed to Series D preferred).
Experience with Storybook, SCSS, testing frameworks, and modern frontend tooling.
Experience working with design systems used across multiple products.

Tech Stack