Lead Frontend Architect for Real-Time Cyber Ops UIs

Twenty Technologies; New York (NY); On-site; USD 150,000 - 190,000; Full time

Benefits offered by this job

Health, dental, and vision plans

Paid parental leave

Flexible PTO

Job summary

Twenty Technologies is hiring a Senior Frontend Engineer to own the frontend architecture for mission-critical operator interfaces. You will build high-performance React/TypeScript apps, visualize real-time cyber operation data, and mentor engineers in a cross-functional team.

You will lead frontend architectural decisions, drive performance, and collaborate with product, design, backend, and operations. This on-site role values high standards and secure engineering practices in a high-stakes

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).
• Hands-on experience with state management patterns and libraries (Redux, Zustand, React Query).
• Strong collaboration with product and design to deliver excellent UX.
• Strong command of Git in professional environment, including CI integration.

Responsibilities

• Architect and build sophisticated React/TypeScript applications at scale.
• Design real-time UI experiences for complex data with speed and clarity.
• Lead frontend architectural decisions and mentor engineers.
• Build and evolve interactive visualization systems (graphs, timelines, streaming views).
• Create reusable frontend patterns and component libraries for consistency and velocity.
• Elevate engineering excellence through reviews, standards, testing, and performance practices.
• Mentor junior engineers through pairing and coaching.
• Coordinate cross-functional work across design, product, backend, and ops.
• Troubleshoot production issues and improve frontend reliability over time.

Skills

React.js

TypeScript

JavaScript/HTML/CSS

Frontend architecture

Mentoring

Performance optimization

Automated testing

State management

Git & CI collaboration

UI/UX collaboration

Education

Bachelor's degree in CS/Engineering

Tools

Vitest

React Testing Library

Playwright/Cypress

Redux

Zustand

React Query

Storybook

Job description

Twenty Technologies is hiring a Senior Frontend Engineer to own the frontend architecture for mission-critical operator interfaces. You will build high-performance React/TypeScript apps, visualize real-time cyber operation data, and mentor engineers in a cross-functional team.

You will lead frontend architectural decisions, drive performance, and collaborate with product, design, backend, and operations. This on-site role values high standards and secure engineering practices in a high-stakes