Senior Full Stack Engineer, Monetization

About the team & opportunity

What’s Calendly’s Monetization team all about anyway?

Calendly’s Monetization team builds the systems that support how users manage subscriptions, billing, and payments. As our platform grows, these systems become even more essential to the user experience and the success of our business. We are looking for:

• A highly technical, talented, and humble human with a deep ownership mindset – you embody the “I’m not done, until we are done” spirit
• A collaborative team member who models technical leadership and is committed to elevating their team
• A team member who is not only open to diverse perspectives and approaches, but someone who actively seeks them out

You will report to the Senior Engineering Manager of our Monetization team in our Growth organization, and your responsibilities will include:

• Owning the creation, execution, and maintenance of one or more entire services or functional areas and function as an SME for them
• Identifying and navigating cross-team dependencies
• Building and supporting applications in a cloud ecosystem

A day in the life of a Senior Full Stack Engineer at Calendly

• Design, build, and operate services and APIs for contacts, companies, syncing third party data sources, deduplication, enrichment, and search - prioritizing reliability, performance, and maintainability.
• Partner with Product and Design to shape requirements, sequence milestones, and deliver incremental value that supports our customers.
• Contribute to our data model and storage strategies for people and related objects, ensuring consistency, privacy, and scalability.
• Improve platform resilience with robust observability, fault-tolerant patterns, and production readiness; participate in on-call to support business critical services.
• Collaborate with adjacent squads to evolve architecture and shared components; participate in code reviews and provide mentorship to peers.
• If you have React/TypeScript experience, contribute to end to end delivery by partnering on UI contracts and occasionally implementing UI that integrates with your services.

On a typical day, you will be working on:

• Design, build and maintain internal tools, integrations and in product features that enable Sales, Marketing and Customer Success teams to operate efficiently and scale.
• Partner closely with cross functional stakeholders to identify pain points, define requirements, and deliver high impact, user centric solutions.
• Own projects end to end, from discovery and system design through implementation, testing, deployment and ongoing iteration.
• Ensure reliability, performance and scalability of systems while continuously improving developer workflows and internal user experience.

What do we need from you?

• 7-10+ years of professional software development experience, including owning production services at scale in a SaaS environment.
• Strong proficiency in backend development, building services, APIs, and data-intensive backend workflows. Must-have.
• Experience designing for scalability, reliability and observability in cloud environments (GCP preferred) with