Frontend Platform Engineer III
Frontend Platform Engineer III at Calendly, accelerating career growth and working on exciting product development with a talented team.
What’s in it for you?
Ready to make a serious impact? Millions of people already rely on Calendly, and we’re still in the midst of exciting product growth — it’s a fantastic time to join us. Everything you’ll work on here will accelerate your career to the next level. If you want to learn, grow, and do the best work of your life alongside the best people you’ve ever worked with, then we hope you’ll consider allowing Calendly to be a part of your professional journey.
About the team & opportunity
Our Mission
We power Calendly's products with reliable, high-performance calendar data infrastructure. Our services provide the foundation for how users interact with their scheduling data, serving as the single source of truth across our platform.
How you will contribute
As a Frontend Platform Engineer on Calendly’s App Platform team, you will be instrumental in building the foundational capabilities that power our product ecosystem. Your work will directly impact how our engineering teams ship features and the quality of experience they deliver to millions of Calendly users..
You will focus on critical platform services including:
Why this role matters
We're at an inflection point. As Calendly continues to scale, our product teams need increasingly sophisticated frontend platform capabilities to move quickly without sacrificing quality. In this role, you’ll help evolve our shared React architecture, package ecosystem, and developer experience. You’ll contribute to engineering standards, strengthen the reliability of our frontend infrastructure, and build the resilient tooling and migration paths our growing platform demands. Your technical collaboration will help shape not only what we build, but how we build across Calendly engineering.
A day in the life of a Frontend Platform Engineer at Calendly
Building Platform Infrastructure
Design, develop, and maintain the services and frameworks that product teams depend on. You will work hands-on with technologies like React and Webpack to build highly resilient, scalable systems; from real-time server-to-client data infrastructure to shared frontend services.
Contribute To Critical Initiatives
Contribute to significant projects from concept to production. Whether it’s building and launching real-time server-to-client infrastructure, optimizing package performance, or designing new platform capabilities, you will deliver high impact solutions with quality and reliability at th
Posted June 6, 2026