Senior Full-Stack Engineer: Page Builder & AI-Ready CMS

CIRCLE; Wilmington (DE); On-site; USD 140,000 - 200,000; Full time

Benefits offered by this job

Equity in company

35 days PTO annually

Remote-only team

Company retreats twice a year

Health & wellbeing benefits

Job summary

Circle is hiring a Senior Full-Stack Engineer to join the CMS Platform team, delivering content creation and page-building features across Circle’s platform. You will work on the Page Builder, forms, and future AI-first interfaces, spanning frontend and backend systems.

You’ll collaborate with product/design, own end-to-end delivery, and contribute to scalable, high-quality experiences in a remote, async-driven environment with global teammates.

Qualifications

• 5+ years of experience building and scaling SaaS products.
• Deep experience with Ruby on Rails and strong proficiency with React & TypeScript.
• A product mindset—you care about the “why,” UX details, and iterate based on customer needs.
• Experience building complex, stateful UI (editors, builders, or design tools) and the systems behind them.
• Solid architectural judgment and a high bar for quality, balanced with pragmatism.

Responsibilities

• Build and ship Page Builder features that directly impact how customers design and publish their sites.
• Work across the stack using React & TypeScript (frontend) and Ruby on Rails (backend).
• Partner closely with product/design to translate specs into high-quality, user-friendly experiences.
• Improve the architecture of the builder/editor and publishing pipeline for reliability, extensibility, and performance.
• Own projects end-to-end—from technical design through implementation, testing, rollout, and iteration.
• Review PRs thoughtfully and contribute to a culture of quality and continuous improvement.
• Work async-first and communicate clearly and proactively.

Skills

Ruby on Rails

React

TypeScript

SaaS product experience

Async communication

Tools

React tooling

Rails tooling

TypeScript tooling

Job description

Circle is hiring a Senior Full-Stack Engineer to join the CMS Platform team, delivering content creation and page-building features across Circle’s platform. You will work on the Page Builder, forms, and future AI-first interfaces, spanning frontend and backend systems.

You’ll collaborate with product/design, own end-to-end delivery, and contribute to scalable, high-quality experiences in a remote, async-driven environment with global teammates.