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Senior Software Engineer - Frontend/React (USA Only - 100% Remote)

Close
Frontend Developer • Senior • Remote • Full-time • 📍 Remote (US)
📄 View original listing (EN)

Close has been building a communication-first CRM since 2013 and is a bootstrapped, profitable, 120-person, fully remote company. The frontend is a single-page TypeScript web app in React, bundled with Vite and targeting modern browsers, tested with Vitest, React Testing Library, Playwright and Chromatic, updating in near real-time via WebSockets and WebRTC, styled with CSS modules and built on an in-house design system documented in Storybook, backed by a Python/Flask/FastAPI, MongoDB, Postgres and Elasticsearch stack on AWS. AI is both how they build and what they ship. When applying, candidates can highlight a preferred team (Agents, Communications, CRM or Growth), and engineers often move between teams over time. This is a US-only, 100% remote role.

Stack

AWSCSSelasticsearchFastAPIFigmaFlaskGitHubgraphqlMongoDBPlaywrightPostgreSQLPythonReactSvelteTypeScriptUI/UXVue

Responsibilities

  • ▹Agents team: build the UI that puts AI in customers' hands, including agent creation and configuration experiences, the conversational interface and observability surfaces
  • ▹Communications team: own the UI for calls, building in-call experiences on WebRTC and WebSockets, live transcript and coaching views, power dialing flows and email, SMS and scheduling surfaces
  • ▹CRM team: build core surfaces (lead pages, pipeline views, smart search, activity feeds) that are fast and delightful, plus AI-powered features
  • ▹Growth team: own onboarding flows, activation moments, billing and checkout UI and the import experience in a hypothesis-driven, experiment-first environment

Requirements

  • ▹A seasoned frontend engineer; React is the core, with experience picking the right tool, possibly across Vue, Svelte or Solid
  • ▹Experience building AI-powered interfaces: shipped LLM-backed features for real users, designing for streamed responses, uncertain states and agent-driven UIs
  • ▹Use AI tools daily in your own workflow to ship faster and reason about unfamiliar code
  • ▹A builder-first mindset who ships early iterations rather than over-polishing
  • ▹Opinionated about UI craft and component design, having built reusable systems other engineers loved
  • ▹Battle-tested: debugged production performance regressions, owned a component library others relied on, or shipped a high-stakes release under real customer pressure

Soft skills

Self-direction and collaborationCare for UI/UX craftBias toward shipping and learning from real usageClear communication

What we offer

  • ▹Competitive pay plus an organization-wide goal-based bonus
  • ▹~5 weeks of PTO to start, plus a 1-week all-company Winter Holiday Break and paid US holidays, earning 2 extra days per year
  • ▹80% Work Option: choose a standard 5-day week or a 4-day week at 80% pay
  • ▹Paid parental leave for primary and secondary caregivers
  • ▹1-month paid sabbatical every 5 years
  • ▹Healthcare (US residents): two medical plans with Close covering 99% of premium, plus Dental, Vision, HSA, FSA and company-paid Long-Term Disability
  • ▹401k (US residents): match up to 6%, vested immediately