Senior Technology Engineer I – Platform Engineering
•AbbvieHybrid· 4h
💻 Engineering⏰ Full-time⭐ Senior🇺🇸 North Chicago, USA
4h ago
Close·9 days ago
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.
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
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
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
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
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!
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.
While we are excited by all the opportunities that generative AI has unlocked, we request that you refrain from relying exclusively on AI tools when completing an application, unless explicitly stated. Every application is read closely by humans and any obviously AI generated applications will be disregarded.
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.