Senior Full Stack Engineer, App Platform

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 empower product engineering teams to build consistent, high-quality features efficiently through shared tooling, standards, and infrastructure that accelerate development while maintaining coherence across our platform.

How you will contribute As a Senior 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 how millions of users experience Calendly.

You will focus on critical platform services including: Analytics and Experimentation to enable data-driven decision making across product teams Feature Flagging infrastructure to provide controlled and predictable releases at scale Real-time UX Infrastructure to enable server-to-client data delivery to support dynamic and responsive experiences Future Platform Services as our platform continues to grow and evolve Why this role matters We’re at an inflection point. As Calendly continues to scale, our product teams need increasingly sophisticated platform capabilities to move quickly without sacrificing quality.

In this role you will help define how we approach distributed platform services, contribute to engineering standards, and build resilient infrastructure that our growing platform demands. Your technical expertise and collaboration will shape not only what we build, but how we build across our engineering organization.

A day in the life of a Senior Full Stack 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 Ruby / Rails and Go to build highly resilient, scalable systems; from real-time server-to-client data infrastructure to analytics and experimentation services.

Technical Leadership and Collaboration Contribute to architectural decision and technical strategy for platform services. Provide guidance to engineers across the organization, share your expertise in distributed systems, and help establish patterns and practices that raise the bar for engineering excellence.

Contribute To Critical Initiatives Own and contribute to significant projects from concept to production. Whether it’s building and launching real-time server-to-client infrastructure, optimizing service performance, or designing new platform capabilities, you will deliver high impact solutions with quality and reliability at the forefront.

Cross-Functional Partnership Partner with product managers, designers, and engineering teams across Calendly to understand their needs and translate them into robust platform solutions that serve the entire organization. Operational Excellence Ensure reliability and performance of platform services through thoughtful monitoring, testing, and incident response.

Participate in on-call rotation to support business-critical systems and drive continuous improvement based on operational learnings. What do we need from you?

7+ years of software engineering experience at a SaaS or technology company with a strong focus on backend and distributed systems Deep experience in service-oriented architecture, microservice patterns, and building highly resilient / scalable systems Proven experience building and operating high traffic, high availability platforms in production environments Strong proficiency in building internal tools, frameworks, and SDKs that other engineers use Experience with API design and real-time data systems (Server Side Events, Websockets, etc) Excellent problem solving skills with the ability to diagnose complex system issues and implement effective solutions Strong communication skills, you can explain complex technical concepts clearly to both technical and non-technical stakeholders Authorized to work lawfully in the United States of America as Calendly does not engage in immigration sponsorship at this time Bonus Experience with Golang, Ruby / Rails, NodeJS / Typescript (our primary backend languages) Background in platform engineering roles Experience performing major architectural refactors, particularly decomposing monolithic applications into microservices Familiarity with our cloud ecosystem: Google Cloud Platform, Kubernetes, PostgreSQL, Redis What will make you successful here You take deep ownership and drive initiatives with a results-oriented mindset You thrive in collaborative environments, working effectively with remote and distributed teams You’re adaptable, comfortable with evolving requirements and new technologies You’re passionate about enabling others and see platform engineering as a force multiplier You’re available to participate in our on-call rotation to ensure the reliability of business-critical services Tier 1 Salary Hiring Range $224,400 — $271,920 USD Tier 2 Salary Hiring Range $205,700 — $249,260 USD Tier 3 Salary Hiring Range $187,000 — $226,600 USD The ranges listed above are the expected annual base salary for this role, subject to change. Calendly takes a number of factors into consideration when determining an employee’s starting salary, including relevant experience, relevant skills sets, interview performance, location/metropolitan area, and internal pay equity.

Base salary is just one component of Calendly’s total rewards package. All full-time (30 hours/week) employees are also eligible for our Top Performer Bonus program (or Sales incentive), equity awards, and competitive benefits.

Calendly uses the zip code of an employee’s remote work location, or the onsite building location if hybrid, to determine which metropolitan pay range we use. Current geographic zones are as follows: Tier 1: San Francisco, CA, San Jose, CA, New York City, NY Tier 2: Chicago, IL, Austin, TX, Denver, CO, Boston, MA, Washington D.

C. , Philadelphia, PA, Portland, OR, Seattle, WA, Miami, FL, and all other cities in CA.

Tier 3: All other locations not in Tier 1 or Tier 2 If you are an individual with a disability and would like to request a reasonable accommodation as part of the application or recruiting process, please let your Recruiter know when first connecting with them. Calendly is registered as an employer in many, but not all, states.

If you are located in Alaska, Delaware, Hawaii, Idaho, Iowa, Montana, Nebraska, North Dakota, Rhode Island, South Dakota, and West Virginia, you will not be eligible for employment. Note that all individual roles will specify location eligibility.

All candidates can find our Candidate Privacy Statement here Candidates residing in California may visit our Notice at Collection for California Candidates here: Notice at Collection This role may require occasional travel for company events, team collaboration, or offsites.