Circle gives creators and organizations a branded home for communities, events, and paid courses, built on a Ruby on Rails and React/TypeScript core with Stripe, Apple Pay, and Google Pay handling checkout. Senior and lead engineering hiring centers on AI quality work: agent evaluation infrastructure, conversation annotation, and cutting AI cost and latency. The RAG and Cursor footprint points to AI features already in production.
Notable leadership hires: Creative Director
Circle is a privately held company founded in 2019 and headquartered in New York, with a team in the 51–200 employee range. Its software lets digital businesses run communities, events, and courses under their own brand. Customers include creators and institutions that monetize their audiences through memberships and course sales. The product stack spans Ruby on Rails, React, Next.js, and TypeScript, with MySQL, PostgreSQL, ClickHouse, Redis, and Kafka on AWS and Kubernetes. Current hiring covers engineering, design, and marketing, with recruiting focused on the United States.
Circle runs Ruby on Rails with Sidekiq, React, Next.js, TypeScript, and Tailwind CSS. Its data layer includes MySQL, PostgreSQL, ClickHouse, Redis, and Kafka, deployed on AWS and Kubernetes, with Stripe handling payments.
Yes. Hiring is accelerating and centers on senior and lead engineering roles focused on AI agent evaluation, AI reliability, and search and recommendation data pipelines. Design and marketing roles, including a Creative Director, are also open.
Circle is building evaluation infrastructure for AI agents and annotation workflows for AI-generated conversations. It is also adding page builder features, improving purchasing flows, and building data pipelines for search and recommendations.
Other companies in the same industry, closest in size
Circle's technology stack, projects, and hiring signals are inferred from public hiring and company data — career pages, public listings, and company web presence — then clustered and de-duplicated. Figures are estimates that refresh over time. Read our full methodology →
This is not an official vendor or customer list. It is a technology-adoption signal inferred from public data, intended for B2B research.
