Twenty

Staff / Principal Frontend Software Engineer

Twenty
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11 months ago
Arlington, VA, USAStaff+

Base Salary

$192k - $455k/yr

Responsibilities

  • Architect and build sophisticated React/TypeScript applications that operate smoothly at scale.
  • Design real-time interfaces for complex cyber operation data with a focus on speed and clarity.
  • Lead frontend technical architecture and design decisions.
  • Build interactive visualization systems such as graphs, timelines, and streaming views.
  • Establish reusable frontend architecture patterns and component libraries.
  • Set engineering standards through code review, testing strategy, performance practices, and technical coaching.
  • Mentor junior engineers through pairing, feedback, and knowledge transfer.
  • Coordinate end-to-end feature delivery with design, product, backend, and operations teams.
  • Troubleshoot production issues, investigate frontend performance, and improve reliability.

Requirements

  • 8+ years of professional frontend software development experience.
  • Deep expertise building production React applications with TypeScript.
  • Strong command of JavaScript/TypeScript, HTML, and CSS.
  • Experience leading frontend technical initiatives and mentoring engineers.
  • Experience with performance at scale, including profiling, optimization, and rendering strategies.
  • Experience with automated testing frameworks such as Vitest, React Testing Library, Playwright, or Cypress for end-to-end testing.
  • 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 experience with Git, branch workflows, code review, and CI integration.
  • Bachelor’s degree in computer science or engineering, or equivalent practical experience.
  • Experience with complex data visualization, real-time streaming data, graph databases such as Neo4j, defense or security domains, AI/ML operational interfaces, or component libraries is preferred.

Benefits

  • Medical, dental, vision, life/AD&D, and disability plan options are available.
  • Eligible full-time employees receive 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 paid time off are provided.
  • 401(k) plans with pre-tax and Roth options, HSA/FSA options, and dependent care FSA are available.
  • This is a full-time, onsite role in Arlington, Virginia, and is limited to U.S. citizens; benefits vary by location, role, and eligibility.

Tech Stack

CSSCypressD3.jsGitHTMLJavaScriptNeo4jReactReduxTypeScript

Categories

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About Twenty

51-200 employees
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