Circle Tech Stack

Branded community platform for creators, brands, and institutions

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

Circle operates a multi-tenant community platform serving 10M+ members across creator and institutional networks. The tech stack (Rails + React + Next.js, Kafka, ClickHouse, Kubernetes, Stripe) reflects a mature B2B SaaS backend with real-time data and payment infrastructure at scale. Active hiring is concentrated in design (3 roles) and engineering (2), with senior/lead-level dominance—typical of a company moving upmarket and tackling infrastructure scaling (database optimization, SRE tooling, resilience tests, incident response) while chasing larger ACV deals.

Tech Stack 30 technologies

Core StackFigma AWS Kubernetes MySQL PostgreSQL ClickHouse Redis Slack Zendesk Ruby on Rails React Kafka TypeScript Tailwind CSS Next.js Playwright JavaScript Stripe RAG Cursor Ruby Notion Android iOS Sidekiq SCSS Appium WebdriverIO Apple Pay Google Pay

What Circle Is Building

◆Challenges

Scaling support globally
Enhancing brand consistency
Quality gate bottlenecks
Reducing friction in quality processes
Closing larger deals
Moving upmarket
Scaling infrastructure for high growth
Maintaining high availability
Incident response for outages
Ai-driven discovery surface

▲Active Projects

Marketing site redesign
Landing page design for product launches
Automation libraries and sdks
Recording/playback tools
Resilience tests
Drive revenue growth close $20k-$100k acv new business deals
Monitoring and alerting system evolution
Database infrastructure optimization
Sre tooling and automation
Discover end-to-end design

Hiring Activity

Accelerating8 roles · 5 in 30d

Department

Design

Engineering

Support

Sales

Seniority

Senior

Lead

Mid

Company intelligence

Find more companies like Circle by tech stack, pain points and active projects

Get started free

About Circle

Circle is a branded community platform designed for creators, brands, and institutions to build and monetize engaged member networks. The product serves communities ranging from individual creator audiences to large institutional deployments like Harvard and SpaceX. The company operates as a fully remote organization with 180+ employees across 30+ countries, headquartered in New York. Core platform surfaces include community spaces, member management, recordings and playback, and payment processing (Stripe, Apple Pay, Google Pay). Current operational focus includes scaling global support infrastructure, optimizing database performance for growth, and evolving monitoring and alerting systems.

HeadquartersNew York

Company Size51–200 employees

Founded2019

Hiring MarketsUnited States, Australia

Frequently Asked Questions

What tech stack does Circle use?

Ruby on Rails and React for core application, Next.js for frontend, Kafka and ClickHouse for data/streaming, Kubernetes for orchestration, PostgreSQL and MySQL for relational data, Redis for caching, Stripe for payments.

Where is Circle headquartered?

Circle is headquartered in New York and operates as a fully remote company with team members across 30+ countries. Current hiring is active in the United States and Australia.

Similar Companies in Technology, Information and Internet

Other companies in the same industry, closest in size

Fluidstack

Technology, Information and Internet

How this profile is built

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.