Founding Front-End Software Engineer – Senior/Staff

SignalFire

Founding front-end engineer joining SignalFire’s talent network for VC-backed startups. Building scalable, high-performance user-facing applications across emerging technology companies.

Posted 8/5/2026full-timeCalifornia • 🇺🇸 United StatesSenior💰 $170,000 - $250,000 per yearWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates expertise in front-end development with a focus on modern JavaScript frameworks, UI/UX design, and performance optimization. Proficient in building scalable applications and integrating APIs while adhering to best practices in code quality and accessibility.

Highest-signal resume keywords

Front-End DevelopmentReactVue.jsJavaScript (ES6+)HTML

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

JavaScript (ES6+)HTMLCSSTypeScriptRESTful APIsGraphQLWebSocketsState ManagementPerformance OptimizationAccessibility (a11y)

Soft Skills

CollaborationCommunication

Tools & Technologies

GitCI/CDJestCypressPlaywrightNext.jsNuxt.js

Industry Keywords

UI/UX DesignComponent LibrariesReusable ArchitectureStartup EnvironmentCode Quality

Tech Stack

Tools & technologies

AngularCypressGraphQLJavaScriptJestNext.jsNuxtReactReduxSvelteTypeScriptVue.js

About the role

Key responsibilities & impact

Design and develop scalable, high-performance front-end applications
Build intuitive, responsive, and visually engaging UI/UX experiences
Optimize front-end performance, accessibility, and responsiveness
Collaborate with product designers, backend engineers, and founders on vision and execution
Develop component libraries and reusable front-end architecture
Implement and maintain state management, API integrations, and client-side logic
Define best practices for front-end development, code quality, and UI testing
Submit an application to join SignalFire’s Talent Ecosystem
SignalFire reviews applications on an ongoing basis and may connect matched candidates with talent partners or startup leaders

Requirements

What you’ll need

3+ years of front-end development experience with a strong track record of shipping user-facing products
Expertise in modern JavaScript frameworks, including React, Vue.js, Angular, or Svelte
Strong proficiency in HTML, CSS, TypeScript, and JavaScript (ES6+)
Experience integrating RESTful APIs, GraphQL, and WebSockets
Knowledge of state management libraries such as Redux, Zustand, Recoil, or Vuex
Familiarity with server-side rendering using Next.js or Nuxt.js and static site generation
Strong understanding of web performance optimization, accessibility (a11y), and security best practices
Proficiency with Git, CI/CD workflows, and front-end testing frameworks such as Jest, Cypress, or Playwright
Experience in early-stage startup environments or small, fast-moving teams is a plus

Benefits

Comp & perks

Equity offered
Visibility into exclusive early-stage opportunities
Profile kept on file for future front-end engineering roles in SignalFire’s portfolio
Potential opportunities with VC-backed startups across AI, cybersecurity, healthtech, fintech, developer tools, and enterprise SaaS