# Staff Frontend SWE
**Company:** [Twenty](https://hotfix.jobs/companies/twenty)
**Location:** New York, NY
**Experience:** 8+ years
**Skills:** React, TypeScript, JavaScript, HTML, CSS, Redux, Zustand, React Query, Vitest, React Testing Library, Playwright, Cypress, Git, CI/CD
**Posted:** 2026-06-16
> Lead frontend architecture for mission-critical cyber operations interfaces. Build high-performance React/TypeScript applications with real-time data visualization and mentor engineers.
## Job Description
## Responsibilities
- Architect and build sophisticated React/TypeScript applications that operate smoothly at scale
- Design real-time UI experiences for complex cyber operation data, optimizing for speed and clarity
- Lead frontend technical architecture and design decisions
- Build and evolve interactive visualization systems (e.g., graphs, timelines, streaming views)
- Establish reusable frontend architecture patterns and component libraries for consistency and velocity
- Raise engineering excellence via code review, standards, testing strategy, and performance practices
- Mentor junior engineers through pairing, feedback, technical coaching, and knowledge transfer
- Coordinate execution across design, product, backend, and operations to deliver end-to-end features
- Troubleshoot production issues, lead frontend performance investigations, and improve reliability over time

## Requirements
- 8+ years of professional frontend software development experience
- Deep expertise building production React.js applications with TypeScript
- Strong command of modern web fundamentals (JavaScript/TypeScript, HTML, CSS)
- Led frontend technical initiatives and mentored engineers through delivery and growth
- Experience building for performance at scale (profiling, optimization, rendering strategies)
- Experience with automated testing practices and frameworks (e.g., Vitest, React Testing Library, Playwright or Cypress for E2E)
- Hands-on experience with state management patterns and libraries (e.g., Redux, Zustand, or React Query)
- Strong collaboration skills with product and design to deliver excellent UX
- Strong command of Git in a professional engineering environment, including branch workflows, code review practices, and CI integration
- Bachelor’s degree in CS/Engineering (or equivalent practical experience)

## Nice to Have
- Experience with complex data visualization (e.g., D3.js, Chart.js, or similar)
- Worked with graph databases and understand graph query patterns (e.g., Neo4j)
- Experience with real-time streaming data and production visualization of live systems
- Experience in defense, security, or other mission-critical domains
- Built UI experiences that surface AI/ML outputs in operational workflows
- Experience with component library or design system development (e.g., Storybook)

## Benefits
- Health: Medical, dental, and vision plan options. Life / AD&D, disability coverage options
- Family: Paid parental leave (12 weeks for birthing parents, 4 for non-birthing parents, 6 weeks for adoptive, foster, or intended parents through surrogacy)
- Vacation: Paid holidays and flexible PTO
- Retirement: 401(k) with pre-tax and Roth options. HSA/FSA options, dependent care FSA
- At the office: Commuter benefits, on-site garage parking, bike storage, building fitness center, desk setup stipend
**Apply:** https://hotfix.jobs/jobs/staff-frontend-swe-at-twenty-88615d59-d373-4da8-b7ac-fae4b3d50bad
**Canonical:** https://hotfix.jobs/jobs/staff-frontend-swe-at-twenty-88615d59-d373-4da8-b7ac-fae4b3d50bad