Fullstack Team Lead (Frontend-Focused)

About the Company

Our client is an early-stage cybersecurity startup building foundational endpoint security technology for Windows, Linux, and macOS.Their work lives deep in the operating system: processes, memory, kernel boundaries, and attacker tradeoffs. We focus on real threats, real exploits, and defensive systems that must hold up against skilled adversaries — not academic exercises.

About the Role

Leadership & Architecture

• Lead and mentor frontend/fullstack engineers
• Define frontend architecture, standards, and best practices
• Drive technical decisions and collaborate with Product, Design, and Backend teams
• Lead agile/scrum ceremonies and technical planning
  

Frontend Expertise

• Build and maintain design systems and shared component libraries
• Implement design tokens and Figma-to-code workflows
• Own Storybook for documentation and visual testing
• Conduct accessibility audits (axe-core, screen reader testing) and remediation
• Apply frontend security best practices (CSP, XSS prevention, secure auth flows)
• Implement internationalization (i18n) and RTL support
• Optimize performance (code splitting, lazy loading, bundle analysis)
• Work within monorepos (Nx, Turborepo, or similar)
• Develop and maintain browser extensions (Chrome/Firefox), including background scripts, secure messaging, and performance optimization

Backend Responsibilities

• Design and build scalable backend services (Node.js/TypeScript or similar)
• Develop and maintain REST and/or GraphQL APIs
• Implement authentication & authorization (JWT, OAuth, session-based flows)
• Optimize performance through caching and efficient data handling
• Ensure logging, monitoring, and observability
• Collaborate on system architecture and API design

Requirements

• 7+ years frontend/fullstack experience
• 2+ years in a technical/team lead role
• Strong expertise in modern frontend frameworks (React / Next.js / similar)
• Experience leading cross-functional teams in agile environments
• Strong architectural thinking with hands-on execution

Why Join Us

• Real Security: Work on defenses against real attackers and real exploits.
• Technical Depth: Solve meaningful challenges involving macOS internals and low-level engineering.
• Impact: Build core components of a foundational cybersecurity product.
• Hands-On Role: Work directly with complex systems and low-level technologies.
• Growth: Develop into a senior technical authority in low-level security engineering.