# Staff Frontend SWE
**Company:** [Twenty](https://hotfix.jobs/companies/twenty)
**Location:** Washington, DC
**Experience:** 8+ years
**Skills:** React, TypeScript, JavaScript, HTML, CSS, Redux, Zustand, React Query, Vitest, React Testing Library, Playwright, Cypress, Git, D3.Js, Chart.Js
**Posted:** 2025-10-12
> Leads frontend architecture for high-performance React/TypeScript UIs visualizing real-time cyber operation data. Mentors engineers, optimizes performance, and collaborates cross-functionally in mission-critical environments. Requires 8+ years experience.
## Job Description
## What You'll Do

- 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.

## Qualifications

### Must Have
- 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**).">
**Apply:** https://hotfix.jobs/jobs/staff-frontend-swe-at-twenty-7b786e18-9ff0-4d80-8801-bc3ea5686ea0
**Canonical:** https://hotfix.jobs/jobs/staff-frontend-swe-at-twenty-7b786e18-9ff0-4d80-8801-bc3ea5686ea0