Circle Tech Stack

Branded community platform for creators and institutions

Technology, Information and Internet New York 51–200 employees Founded 2019 Privately Held

Circle operates a community platform serving millions of members across creator and institutional accounts, built on Ruby on Rails + React + PostgreSQL with emerging AI infrastructure (RAG, LLM inference). The tech direction signals a shift toward AI-powered features: active projects include LLM inference infrastructure and retrieval-augmented generation, while pain points center on modernizing legacy systems and scaling real-time backend performance — typical markers of a maturing product transitioning from founder-led to engineering-led architecture.

Tech Stack 28 technologies

Core StackFigma Ruby on Rails MySQL PostgreSQL React Kafka TypeScript Tailwind CSS Next.js Playwright JavaScript Stripe RAG Cursor Ruby Sidekiq SCSS Appium WebdriverIO Apple Pay Google Pay CSS YouTube Meta TikTok LinkedIn Claude

What Circle Is Building

◆Challenges

Modernizing legacy stack
Improving conversion rates
Performance reliability in real-time systems
Reducing third-party dependencies
Closing larger deals
Selling high tier plans
Scaling sales organization
Scaling high-traffic website builder
Enhancing brand consistency
Scaling billing infrastructure

▲Active Projects

Ci pipeline improvements
Ai agents
Llm inference infrastructure
Retrieval-augmented generation
Marketing site redesign
Recurring online content franchises
High-scale backend systems for website builder
Billing and plan infrastructure
Trial and onboarding flows
Analytics and member experiences

Hiring Activity

Steady25 roles · 10 in 30d

Department

Engineering

Marketing

Design

Sales

Finance

Support

Seniority

Senior

Lead

Mid

Manager

Notable leadership hires: Media Lead

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About Circle

Circle is a branded community platform designed for creators, brands, and institutions to build and manage member-based communities. The product serves millions of community members across a distributed user base that includes top creators and institutional accounts. The company operates as a fully remote organization of 180+ employees across 30+ countries. Their platform offers community hosting, member management, and billing infrastructure; ongoing projects span CI/CD improvements, website builder scalability, recurring content franchises, and trial/onboarding flows.

HeadquartersNew York

Company Size51–200 employees

Founded2019

Hiring MarketsUnited States

Frequently Asked Questions

What tech stack does Circle use?

Circle builds on Ruby on Rails and React for core application logic, MySQL and PostgreSQL for data, with Kafka for event streaming, Sidekiq for job processing, and Next.js for frontend work. Payment integrations include Stripe, Apple Pay, and Google Pay. They are actively developing LLM inference and retrieval-augmented generation capabilities.

What is Circle working on?

Active projects include CI pipeline improvements, AI agents and LLM inference infrastructure, a marketing site redesign, high-scale backend systems for a website builder, billing infrastructure, and analytics. Pain points indicate focus on modernizing legacy systems, scaling real-time performance, and improving conversion and sales processes.