Founding Front-End Software Engineer – Senior/Staff

SignalFire

Founding front-end engineer building scalable, user-centric applications for SignalFire’s VC-backed startup portfolio. Shaping front-end architecture, performance, design systems, and reusable UI components.

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

Core Competencies

Role fit

Core Competencies

Use this summary to align your resume positioning with the role.

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

Highest-signal resume keywords

Front-End DevelopmentReact, Vue.js, Angular, SvelteHTML, CSS, TypeScript, JavaScript (ES6+)RESTful APIs, GraphQL, WebSocketsState Management Libraries

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

Front-End DevelopmentJavaScript FrameworksHTMLCSSTypeScriptAPI IntegrationState ManagementWeb Performance OptimizationGitFront-End Testing Frameworks

Tools & Technologies

GitCI/CD WorkflowsJestCypressPlaywrightNext.jsNuxt.js

Industry Keywords

UI/UX DesignAccessibility (a11y)Security Best PracticesEarly-Stage Startup Experience

Tech Stack

Tools & technologies

AngularCypressGraphQLJavaScriptJestMobXNext.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 to align on vision and execution
Develop component libraries and reusable front-end architecture for scalable applications
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
Maintain a profile for consideration by SignalFire portfolio companies and future front-end engineering opportunities

Requirements

What you’ll need

3+ years of experience in front-end development 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, Vuex, or MobX
Familiarity with server-side rendering and static site generation, including Next.js or Nuxt.js
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
Ability to submit a complete and verifiable LinkedIn URL
Resume/CV submission required; PDF format preferred
Current or preferred working location required on the application form

Benefits

Comp & perks

Equity offered
Visibility into exclusive early-stage opportunities
Profile shared with SignalFire portfolio companies for potential matching
Ongoing consideration for future front-end engineering roles