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Frontend Developer

Job in Boulder, Boulder County, Colorado, 80301, USA
Listing for: Circadence
Full Time position
Listed on 2026-03-23
Job specializations:
  • Software Development
    Web Developer
Salary/Wage Range or Industry Benchmark: 80000 - 100000 USD Yearly USD 80000.00 100000.00 YEAR
Job Description & How to Apply Below

We’re building fast, reliable, and accessible web experiences that turn complex workflows into intuitive UIs in cybersecurity training. You’ll own meaningful slices of our front-end stack. You know when features are ready to ship. You will work closely with stakeholders to deliver product value end-to-end. We’re looking for an engineer who brings attention to detail, strong HTML, CSS, and JS experience, and a collaborative mindset to help us deliver reliable, high-quality UI.

Responsibilities

- What you’ll do:
  • Build and ship user-facing features with React + Type Script, from idea → PR → production, emphasizing reliability, performance, and accessibility.
  • Collaborate with Product Design to translate Figma specs into responsive, reusable components that align with our design system.
  • Integrate with REST APIs, shape API contracts with backend partners and handle data/state elegantly (e.g., React Query, Redux, or Zustand).
  • Improve performance (bundle size, code-splitting, memoization, virtualization) and accessibility (WCAG, semantic HTML, ARIA) as part of everyday work.
  • Write robust tests (unit, component, and integration with Vitest/RTL/Cypress) and participate in code reviews to raise the quality bar.
  • Contribute to our component library and documentation; advocate for consistency, DX, and maintainability.
  • Partner with PM/Design to break down work, estimate work, and collaborate on best practices for Agile
Required Qualifications
  • Experience building accessible, responsive UIs with performance in mind.
  • Proficiency with Git, PR workflows, and modern frontend tooling:
    Vite, ESLint, and type-aware linting.
  • Strong experience with CSS best practices, SASS, and component libraries
  • A pragmatic testing mindset—you test what matters and keep it maintainable (we use Playwright for e2e and Testing Library where we add unit tests).
  • Strong collaboration and communication skills—you seek clarity, share context, and ship.
Preferred Qualifications
  • Experience with interactive canvas or graph UIs (e.g. React Flow / XY Flow), drag-and-drop, or diagram-style interfaces.
  • Familiarity with Django REST (or similar) backends and session-based auth from the frontend.
  • Latest LLM tooling
How we work
  • Tooling:
    React, Type Script, Vite/Webpack, Jest, React Testing Library, Cypress, Storybook.
  • Collaboration:

    Teams, Linear/Jira, Figma, design reviews, weekly demos, and blameless post-mortems.
  • Quality: CI on every PR, peer reviews, feature flags, and progressive delivery.
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