Twenty

Staff / Principal Frontend Software Engineer

Twenty
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9 hours ago

Base Salary

$192k - $455k/yr

Responsibilities

  • Architect and build high-performance React/TypeScript applications at scale.
  • Design real-time interfaces for complex cyber operation data.
  • Lead frontend architecture and technical design decisions.
  • Build interactive visualization systems such as graphs, timelines, and streaming views.
  • Establish reusable frontend architecture patterns and component libraries.
  • Improve engineering quality through code review, standards, testing strategy, and performance practices.
  • Mentor junior engineers through pairing, feedback, technical coaching, and knowledge transfer.
  • Coordinate delivery across design, product, backend, and operations.
  • Troubleshoot production issues and lead frontend performance and reliability improvements.

Requirements

  • 8+ years of professional frontend software development experience.
  • Deep expertise building production React.js applications with TypeScript.
  • Strong command of JavaScript/TypeScript, HTML, and CSS.
  • Experience leading frontend technical initiatives and mentoring engineers.
  • Experience with performance profiling, optimization, and rendering strategies at scale.
  • Experience with automated testing frameworks such as Vitest, React Testing Library, Playwright, or Cypress.
  • Hands-on experience with state-management patterns and libraries such as Redux, Zustand, or React Query.
  • Strong collaboration skills with product and design teams.
  • Professional Git experience, including branch workflows, code review, and CI integration.
  • Bachelor’s degree in CS/Engineering or equivalent practical experience.
  • Preferred experience with complex data visualization, graph databases such as Neo4j, real-time streaming data, defense or security domains, AI/ML operational workflows, and component libraries or design systems such as Storybook.

Benefits

  • Medical, dental, vision, life/AD&D, and disability plan options.
  • Paid parental leave, including 12 weeks for birthing parents, 4 weeks for non-birthing parents, and 6 weeks for adoptive, foster, or intended parents through surrogacy.
  • Paid holidays and flexible PTO.
  • 401(k) with pre-tax and Roth options, plus HSA/FSA and dependent care FSA options.
  • On-site, full-time role in Arlington, Virginia; U.S. citizenship is required.

Tech Stack

CSSCypressD3.jsGitHTMLJavaScriptNeo4jReactReduxTypeScript

Categories

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About Twenty

51-200 employees
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