Frontend Engineer

Oneleet•Beaverton, OR

1d•Remote

About The Position

As a Frontend Engineer at Oneleet, you'll own the user experience layer of our cybersecurity platform. You'll build the dashboards, workflows, and data visualizations that security teams use day-to-day — turning complex underlying data into clear, actionable interfaces. This is a hands-on, React-focused role at a Series A startup. You'll partner closely with our Product Designer and PM on a mock-up-first workflow — taking mock-ups and shipping them quickly without losing design fidelity. You'll extend our existing component library, push back when patterns don't hold up, and work directly with customers to validate what you ship. Working primarily in TypeScript and React, you'll help us ship a polished product against named competitors.

Requirements

5+ years of frontend engineering experience with deep expertise in React and TypeScript
Strong track record of shipping production UIs in modern frameworks
Hands-on experience working inside mature component libraries and design systems
Experience with state management, performance optimization, and complex data fetching patterns
Comfortable with data visualization libraries
Strong eye for design fidelity — comfortable pushing back on patterns or mock-ups when something doesn't hold up
Solid debugging skills in the browser and across the network boundary
Experience gathering requirements from users and translating feedback into UI improvements
Strong communication skills and comfort working directly with customers and design
Scrappy; prior startup experience and not afraid to get their hands dirty
Pragmatic; knows how to ship fast without unnecessarily complicating things
Experience in (and thrives in) a fast-moving, start-up engineering environment

Nice To Haves

Background in cybersecurity or developer tools
Experience with real-time data updates and WebSocket implementations
Experience designing or building accessible (WCAG-conformant) interfaces
Experience with end-to-end testing frameworks

Responsibilities

Build UI components and full pages in React/TypeScript across the platform
Extend and maintain our existing component library, ensuring consistency across the product
Implement complex triage, filtering, and workflow flows that handle high-volume data
Build data visualizations for dashboards, posture views, and reporting
Optimize frontend performance — list virtualization, smart pagination, responsive interactions on large datasets
Implement real-time updates where they matter
Partner with the Product Designer on mock-up reviews and on extending the component library
Work with fullstack and backend engineers to shape the APIs that power the UI
Build feedback loops and analytics that capture user interactions with new features
Work directly with customers and design partners to validate UX and iterate quickly