Senior Full Stack Engineer, Support Engineering

Calendly is a company experiencing exciting product growth, and they are seeking a Senior Full Stack Engineer to join their Support Engineering team. This role involves designing and building internal tools and integrations that enhance the efficiency of Sales, Marketing, and Customer Success teams, while ensuring system reliability and performance.

Responsibilities:

• 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
• 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

Requirements:

• 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 container orchestration (Kubernetes)
• Experience with service oriented architectures and modernizing or decomposing legacy systems to services where appropriate
• Proficient with relational databases (PostgreSQL preferred) and data modeling for complex domains
• Bias for clean, maintainable code, thoughtful testing and incremental delivery; strong collaboration and communication skills
• Availability to participate in an on-call rotation for critical services
• Authorized to work lawfully in the United States of America, as Calendly does not engage in immigration sponsorship at this time
• Frontend experience with React and TypeScript or a strong interest in partnering closely on UI contracts and end-to-end delivery
• Experience with microfrontends, Node services, Rails ecosystems, and event-driven architectures