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

🇪🇸 Please note that the Close team will be offline from April 20th - 24th for our annual team retreat in Barcelona, Spain. We'll be spending this time collaborating in person. In the weeks surrounding this event, we'll be slow to review your application but will aim to get back to you as soon as possible. Thank you in advance for the extra patience!

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 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 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 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

About You

We'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.

You’re 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.
• 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 (ET, CT, MT, PT time zones).

Bonus points if you have…

• 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

Benefits

• Competitive compensation including an organization-wide goal-based bonus
• Paid Time Off: 4+ weeks of PTO upon joining + 2 extra days of PTO for each year you're with the company.
• Six paid US holidays, including team-wide Winter and Summer breaks
• Paid Parental Leave for primary and secondary caregivers
• Sabbatical: After 5 years with the team, you’re eligible for a 1 month paid sabbatical
• Healthcare (US residents): Medical, Dental, Vision with HSA option (US residents), Dependent care FSA (US residents)
• 401k (US residents): We match 6% contributions with immediate vesting

Our Values

Build a house you want to live in - Examine long-term thinking and action

No BS - Practice transparency and honesty, especially when it’s hard

Invest in each other - Build successful relationships with your coworkers and customers

Discipline equals freedom - Keep your word to yourself and others

Strive for greatness - Constantly challenge yourself and others

Learn More

Listen to our CEO and Founder, Steli Efti, tell the story of Close’s journey in the $0-30m Blueprint. 

Watch our culture video from our 2023 team retreat in Milan. Every year our entire team gathers in person to build connection, foster cross-functional collaboration, and have fun. In 2026, we’re headed to Barcelona, Spain!

Explore our product. Check out a demo!

Our Hiring Process

We ask a few role-specific questions as part of our application process. These questions are designed to help us learn more about you from the start so please answer each question thoughtfully. We see this as an opportunity to get to know you beyond your resume.

We use AI tools daily at Close and expect candidates do too. In evaluating your application, we aim get a sense for you - the way you think, how you communicate, the work you've done. Applications that read as fully AI-generated will not be considered.

Regardless of fit, you can expect to hear back from our team with an update on the status of your candidacy. 

If you progress to the interview process, you’ll receive a full outline of the role-specific interview process in your first touchpoint with us. We do our best to make the hiring process clear and human.