Key skills
ReactTypeScriptViteVitestReact Testing LibraryChromaticWebSocketsWebRTCCSS modulesStorybookFigmaREST APIGraphQLPythonFlaskFastAPIMongoDBPostgresElasticsearchAWSLLM-backed featuresAI tools Claude CodeAI tools CodexOpinionated about UI craft and component designAILLMClaudeVueSvelteCRMCommunicationSales
About this role
Close is a CRM company that has been operating since 2013, focused on enhancing sales through communication-first software. The Senior Software Engineer will be responsible for building and improving the frontend of their application using React, collaborating closely with product teams to ensure a seamless user experience.
Responsibilities:
- Build the UI that puts AI in the hands of Close customers
- Own the UI for one of the most real-time, high-stakes surfaces in Close: calls
- Build the core surfaces that salespeople and agents both depend on: lead pages, pipeline views, smart search, activity feeds
- Own the surfaces that turn someone who just signed up into a paying customer who sticks around
Requirements:
- A seasoned frontend engineer
- React is our bread and butter, but perhaps you've worked across Vue, Svelte, or Solid
- You've seen a variety of problems, can collaborate and self-direct
- Building AI-powered interfaces
- You've shipped LLM-backed features for real users and have a POV on where they're trustworthy, where they fall over, and how to make them feel reliable when customers bet their workflow on the output
- You know how to design for streamed responses, uncertain states, and agent-driven UIs
- Working with AI daily
- You use AI tools in your own workflow to ship faster, write tighter code, and reason about unfamiliar parts of the codebase
- We fund the use of AI tools (Claude Code, Codex, and other best-in-class developer tools) and treat learning and experimentation as part of the work
- A builder first
- You'd rather get the first iteration of a feature in front of fifty customers than spend three weeks fretting over a perfect PR
- You ship
- Opinionated about UI craft and component design
- You've built reusable systems that other engineers loved using, and you think about who's on the other end — sales reps in the middle of a call, power users who live in the keyboard, and customers who just need it to work
- Battle-tested
- You've debugged performance regressions in production, owned a component library everyone else relied on, or shipped a high-stakes release where the UX had to be right under real customer pressure