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

Close is a CRM company focused on helping teams sell more efficiently since 2013. They are seeking a Senior Frontend Software Engineer to join their engineering team, where the individual will work collaboratively on user-facing features and enhancements using modern web technologies.

Responsibilities:

• 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 and 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, and AssemblyAI
• Expanding our frontend GraphQL usage
• Extending our React component library

Requirements:

• 5+ years experience building modern frontend single page applications in JavaScript, HTML, and CSS, with at least 3 years of that experience using React
• 8+ years of experience for Staff level candidates
• Significant experience designing, debugging, and optimizing frontend applications to make them fast and reliable
• Significant experience with REST APIs and thoroughly understand HTTP requests
• Experience participating in code reviews and providing overall code quality suggestions to help maintain the structure and quality of the codebase
• Great product sense and able to think through user experience issues before diving into the code
• Exhibit a love for great UI
• Care about the craftsmanship of the code and systems you produce
• Located in the USA (ET, CT, MT, PT time zones)
• Experience implementing real-time (e.g. websockets, polling, etc.) web apps
• Experience working with GraphQL endpoints
• Utilized models from AI companies like OpenAI, Anthropic and AssemblyAI in a production web app
• An eye for design and experience with Figma, Sketch, Abstract, Photoshop, or similar
• Led small project teams building and launching features
• Contributed open source code (core or plugins) for a popular frontend framework such as React, Vue, or Angular
• Built B2B SaaS products
• Experience with sales or sales tools