Senior Software Engineer - Backend/Python (USA Only - 100% Remote)

Close
USA - RemotePosted 7 April 2026

Job Description

Senior Software Engineer - Backend/Python (USA Only - 100% Remote) ABOUT US Close https://close.com/ is a bootstrapped, profitable, 100% remote, ~100 person team of thoughtful individuals who prioritize taking ownership and making a meaningful impact. We’re eager to make a product our customers fall in love with over and over again. We 💛 small scaling businesses. Since 2013, we’ve 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 designed, all-in-one, communication-focused CRM. Our backend tech stack https://stackshare.io/close-crm/close consists primarily of Python Flask web apps with our TaskTiger https://github.com/closeio/tasktiger scheduler handling many of the backend asynchronous task processing chores. Our data stores include MongoDB, PostgreSQL, Elasticsearch, and Redis. The underlying infrastructure runs on AWS using a combination of managed services like EKS, MSK, RDS and ElasticCache and non-managed services running on EC2 instances. We have CI/CD pipelines that build Docker images, run automated tests and deploy to Kubernetes clusters. We also use these images in our local development environment allowing coding locally against all of our services. We have a well-documented public API https://developer.close.com/ that is consumed by our front-end JavaScript app as well as numerous integrations. Our infrastructure is heavily automated using Terraform, Ansible and other AWS tools. We love 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 out our open source projects like SocketShark https://github.com/closeio/socketshark, TaskTiger https://github.com/closeio/tasktiger, LimitLion https://github.com/closeio/limitlion and ciso8601 https://github.com/closeio/ciso8601. ABOUT THE ROLE You will be joining one of our six cross-functional teams. These are the CRM, Growth, Conversations, Messaging & Scheduling, Automations & Integrations and Data Insights teams. You will be regularly collaborating with other backend & frontend engineers, product managers, designers, and other teams here at Close. ABOUT YOU You are a curiosity-led, high-performing, full-time Software Engineer who is impassioned by the impact your work can have on your fellow team members and, ultimately, our end users. You value collaboration, knowledge sharing, and have a good understanding of web technologies and want to help design, implement, launch, and scale major systems and 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're able to manage time well, communicate effectively, and collaborate in a fully distributed team. 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 - Improving the performance and scalability of our GraphQL and REST https://developer.close.com/ API - Improving how we sync https://close.com/emailing/ millions of sales emails and calendar events each month - Working with Twilio's API, WebSockets, and WebRTC to improve our calling features https://close.com/calling/ - Building user-facing analytics features that provide actionable insights based on sales activity data - Improving our Elasticsearch-backed powerful search features - Improving our internal messaging infrastructure using streaming technologies like Kafka and Redis Building new and enhancing existing integrations with other SaaS platforms like Google’s G Suite, Zapier, and web conferencing providersEnhancing our web app with real-time updates powered by GraphQL Subscriptions - Leveraging the latest AI LLMs from providers like O ... (truncated, view full listing at source)
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