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

Senior Software Engineer - Frontend/React (USA Only - 100% Remote) ABOUT US Since 2013, we've been building a CRM that gets out of our customers’ way and helps teams sell more, faster. No manual data entry, just communication-first sales software designed to help SMBs succeed and scale. We're bootstrapped and profitable which means we answer to our customers and play by our own rules. We're proud of our ~120 person, 100% remote team of thoughtful individuals who prioritize taking ownership and making a meaningful impact. Our Engineering team has grown to 50+ members across Frontend, Backend, and Infrastructure. We prioritize craftsmanship and collaboration. We’re committed to shipping the things that matter to our customers in the most thoughtful, scalable, and innovative ways possible. Our app’s frontend is a single-page TypeScript web app mostly written in React (originally built with Backbone.js). Our mobile app is built using React Native. We bundle with Vite and target only modern browsers. We test with Vitest, React Testing Library, Playwright, and Chromatic for VRT. Our UI updates in near real-time, is styled via CSS modules, and takes advantage of fun technologies like Websockets and WebRTC. We care about performance (e.g. route-based code splitting or skeleton UI), maintainability, and testability of our frontend code. We sweat the UI/UX details and work collaboratively with the Product team throughout the design process. This means diving into lo-fi wireframes, and communicating continuously when those ideas are brought to life using Figma and code. We’ve built our own design system, for which we have created an extensive Storybook to explore and test. Our frontend app is built on top of our REST API & GraphQL endpoints. Our backend tech stack https://stackshare.io/close-crm/close consists of Python/Flask, MongoDB, Postgres, Elasticsearch, and Redis. We run our services in Docker on AWS. We ❤️ open sourcing our code and ideas on our GitHub https://github.com/closeio and on The Making of Close https://making.close.com/, our behind-the-scenes Product & Engineering blog. Check our projects such as react-custom-scroller https://making.close.com/posts/introducting-react-custom-scroller-component, use-infinite-scroll https://making.close.com/posts/introducting-use-infinite-scroll-react-hook, use-abortable-effect https://making.close.com/posts/introducting-use-abortable-effect-react-hook, and smart-tooltip-delay https://making.close.com/posts/introducing-smart-tooltip-delay-library or insights from our day-to-day work on such as Under the Hood: Developing Close's AI-Powered Call Assistant https://making.close.com/posts/developing-the-call-assistant, Cutting our Lead page LCP by half https://making.close.com/posts/cutting-our-lead-page-lcp-by-half, and Highlights From a Complex Downshift.js Refactor https://making.close.com/posts/highlights-from-a-complex-downshift-js-refactor/. ABOUT THE ROLE You would be joining one of our six cross-functional product development teams. These include the CRM, Growth, Conversations, Messaging & Scheduling, Automations & Integrations and Data Insights teams. You will be working with other Frontend Engineers as well as Backend Engineers, Product Managers, Designers and other functional teams here at Close to drive initiatives across the finish line. Come help us with projects like... - Conceiving, designing, building, and launching new user-facing features - Implementing new AI features to turbocharge our customers’ daily tasks - Working with Twilio's API, WebSockets, and WebRTC to improve our calling https://close.com/calling/ and SMS https://www.close.com/sms features - Building user-facing analytics features that provide actionable insights based on sales activity data - Enhancing our web app with real-time updates powered by GraphQL Subscriptions - Improving real-time collaboration user experience - Leveraging the latest AI LLMs from providers like OpenAI, Claude Code, a ... (truncated, view full listing at source)