Senior Full Stack Engineer (Frontend-Leaning), Scheduling

Calendly is a rapidly growing company that provides scheduling solutions for millions of users. They are seeking a frontend-leaning Full Stack Engineer to own end-to-end experiences, focusing on crafting user interfaces and collaborating on backend services.

Responsibilities:

• Own end-to-end features across the stack, with a strong emphasis on frontend: from collaborating on UX flows and designs, to building React/TypeScript UIs, to wiring those experiences into backend APIs and services
• Collaborate closely with Product, Design, and other engineers to break down problems, refine requirements, and ship incremental value behind feature flags and experiments
• Contribute to backend APIs and services: extend existing endpoints or services (e.g., in Node.js or Rails), design new data contracts, and ensure that backend changes are observable, well-tested, and resilient
• Write automated tests across the stack (unit, integration, and UI tests) to protect critical user flows and keep regressions out of production
• Review code and technical designs, giving and receiving feedback that raises the bar for clarity, maintainability, and performance
• Mentor and coach other team members

Requirements:

• 7+ years of software engineering experience at a SaaS or technology company with a strong focus on UX engineering and design systems
• Significant experience with modern frontend development, including:
• Building complex, production-grade UIs with React and TypeScript
• Comfort with state management, routing, forms, and asynchronous data fetching (e.g., Redux Toolkit, RTK Query, or similar patterns)
• Strong grasp of CSS-in-JS or modern styling approaches, component libraries, and design systems
• A focus on performance, accessibility, and responsive design
• Hands-on backend experience, such as:
• Implementing REST or GraphQL APIs in Node.js, Ruby on Rails, or a similar web framework
• Working with relational databases (e.g., PostgreSQL) and understanding how schema and query design affect performance
• Familiarity with service-oriented or microservice architectures, including how frontend and backend collaborate across service boundaries
• Ability to work closely with designers, PMs, and other engineers; you explain tradeoffs clearly and can drive decisions to closure
• Proven ability to deliver complex projects on time, including delegating to other engineers and cross-team collaboration
• Experience using AI coding assistants (Copilot, Cursor, etc.) as productivity tools, with a clear understanding of generated code and the ability to defend implementation choices
• Availability for participation in an on-call rotation, ensuring prompt and effective responses to business-critical alerts outside of regular working hours
• Authorized to work lawfully in the United States of America as Calendly does not engage in immigration sponsorship at this time