Time zones: EST (UTC -5), CST (UTC -6), MST (UTC -7), PST (UTC -8), AKST (UTC -9), HST (UTC -10)About UsClose is a bootstrapped, profitable, 100% remote, ~100 person team of thoughtful individuals who value autonomy and impact. Were eager to make a product our customers fall in love with over and over again.We small scaling businesses. Since 2013, weve been building a CRM that focuses on better communication, without the hassle of manual data entry or a complex UI. We are out to supercharge sales productivity with the most modern, thoughtfully all-in-one, AI-powered, and communication-focused CRM.Our apps 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 (VRT). Our UI updates in near real-time and 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. Our product development process is inspired by Shape Up. 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 (Storybook).Our frontend app is built on top of our REST API & GraphQL endpoints. Our backend tech stack 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 and on The Making of Close, our behind-the-scenes Product & Engineering blog. Check our projects such as react-custom-scroller, use-infinite-scroll, use-abortable-effect, and smart-tooltip-delay or insights from our day-to-day work on such as Under the Hood: Developing Close's AI-Powered Call Assistant, Cutting our Lead page LCP by half, and Highlights From a Complex Downshift.js Refactor.About the RoleYou would be joining one of our six cross-functional product development teams. These include the CRM, Admin & Onboarding, 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 teams here at Close.Come help us with projects like...Conceiving, designing, building, and launching new user-facing featuresImplementing new AI features to turbocharge our customers daily tasksWorking with Twilio's API, WebSockets, and WebRTC to improve our calling and SMS featuresBuilding user-facing analytics features that provide actionable insights based on sales activity dataEnhancing our web app with real-time updates powered by GraphQL SubscriptionsImproving real-time collaboration user experienceLeveraging the latest AI LLMs from providers like OpenAI, Groq and AssemblyAIExpanding our frontend GraphQL usageExtending our React component libraryAbout YouWe're looking for an experienced full-time Frontend Software Engineer to join our engineering team. Someone who has a solid understanding of web technologies and wants to help design, implement, and launch major user-facing features.Youre comfortable working in a fast-paced environment with a small and talented team where you're supported in your efforts to grow professionally. You are able to manage your time well, communicate effectively and collaborate in a fully distributed team.Senior 1 & 2 level candidates should have 5+ years experience building modern frontend single page applications in JavaScript, HTML, and CSS, with at least 3 years of that experience using React.Staff level candidates should have 8+ years of experience.Mid-level candidates should have ~3 years of similar experience and be eager to level up with the right opportunity.You should have significant experience designing, debugging, and optimizing frontend applications to make them fast and reliable. You have significant experience with REST APIs and thoroughly understand HTTP requests. You have experience participating in code reviews and providing overall code quality suggestions to help maintain the structure and quality of the codebase.You should have great product sense and be able to think through user experience issues before diving into the code, and you exhibit a love for great UI.You care about the craftsmanship of the code and systems you produce.You are located in the USA (lower 48 timezones).Bonus points if you have...Experience implementing real-time (e.g. websockets, polling, etc.) web appsExperience working with GraphQL endpointsUtilized AI LLMs from providers like OpenAI, Groq and AssemblyAI in a production web appAn eye for design and experience with Figma, Sketch, Abstract, Photoshop, or similarLed small project teams building and launching featuresContributed open source code (core or plugins) for a popular frontend framework such as React, Vue, or AngularBuilt B2B SaaS productsExperience with sales or sales tools