Senior Frontend Architect - Real-Time Cyber Ops UI

Twenty; New York (NY); On-site; USD 192,000 - 455,000; Full time

Benefits offered by this job

Health plan

Parental leave

Paid holidays

401(k) with options

Job summary

Twenty Technologies seeks an accomplished Senior Frontend Engineer to own the frontend architecture for mission‑critical operator interfaces. You’ll lead UI direction, mentor engineers, and partner with backend, product, and design to ship real‑time, reliable web apps for cloud and on‑prem environments.

You’ll build scalable React/TypeScript applications, establish reusable patterns, and drive performance and testing practices in a high‑stakes setting.

Qualifications

• 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 (Vitest, RTL, Playwright or Cypress for E2E).
• Hands-on experience with state management libraries (Redux, Zustand, React Query).
• Strong collaboration with product and design to deliver excellent UX.
• Strong command of Git in a professional engineering environment, including CI workflows and code reviews.
• Bachelor’s degree in CS/Engineering or equivalent experience.

Responsibilities

• Architect and build React/TypeScript apps at scale.
• Design real-time UI experiences for complex data.
• Lead frontend architecture and design decisions.
• Build interactive visualization systems (graphs, timelines, streaming views).
• Create reusable frontend patterns and component libraries.
• Improve engineering reliability via reviews, standards, and testing."
• Mentor junior engineers through pairing and coaching.
• Coordinate cross-functional delivery of end-to-end features.
• Troubleshoot production issues and optimize frontend performance.

Skills

Frontend architecture

React/TypeScript

Performance optimization

Code review & testing

Mentoring engineers

Education

Bachelor’s degree in CS/Engineering

Tools

Git

Job description

Twenty Technologies seeks an accomplished Senior Frontend Engineer to own the frontend architecture for mission‑critical operator interfaces. You’ll lead UI direction, mentor engineers, and partner with backend, product, and design to ship real‑time, reliable web apps for cloud and on‑prem environments.

You’ll build scalable React/TypeScript applications, establish reusable patterns, and drive performance and testing practices in a high‑stakes setting.