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Senior Full Stack Engineer, App Platform

Calendly is a fast-growing scheduling platform used by millions, investing in platform capabilities that accelerate feature delivery and maintain system coherence. We are looking for a Senior Full Stack Engineer on the App Platform team to help design, build, and operate core platform services—analytics & experimentation, feature flagging, real-time server-to-client infrastructure, and future platform services—that enable product teams to ship quickly and reliably.

Skills

  • Deep experience with backend and distributed systems engineering
  • Service-oriented architecture and microservice design patterns
  • Proven production experience building high-traffic, high-availability systems
  • API design and real-time systems (SSE, WebSockets) expertise
  • Experience building internal tools, SDKs, and frameworks consumed by other engineers
  • Diagnostics, performance optimization, monitoring, and incident management
  • Clear written and verbal communication across technical and non-technical stakeholders
  • Strong ownership mindset and ability to drive projects end-to-end

Responsibilities

  • Design, build, and maintain platform services and frameworks (analytics, experimentation, feature flags, real-time delivery).
  • Contribute to architecture and technical strategy for distributed platform services.
  • Own major initiatives from design through production and iteration.
  • Collaborate cross-functionally with product, design, and product engineering teams to translate needs into platform solutions.
  • Ensure operational excellence through monitoring, testing, incident response, and participation in on-call rotation.
  • Mentor and provide technical guidance to other engineers across the organization.

Education

  • Bachelor’s degree in Computer Science, Engineering, or related field, or equivalent practical experience
  • Authorized to work lawfully in the United States (no visa sponsorship)

Benefits

  • Top Performer Bonus program and/or sales incentive
  • Equity awards as part of total compensation
  • Competitive benefits package (healthcare, paid time off, retirement contributions)
  • Remote-first work with occasional travel for events and offsites
  • Opportunities for career growth, mentorship, and technical leadership
To read the complete job description, please click on the ‘Apply’ button
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Average salary estimate

$229460 / YEARLY (est.)
min
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$187000K
$271920K

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Calendly is on a mission to take the work out of scheduling so that our customers can accomplish more. Our product is used by millions of people across many industries including sales, recruiting, customer success and education.

3 jobs
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CULTURE VALUES
Inclusive & Diverse
Rise from Within
Mission Driven
Diversity of Opinions
Work/Life Harmony
Take Risks
Startup Mindset
Collaboration over Competition
Fast-Paced
Growth & Learning
BENEFITS & PERKS
Dental Insurance
Vision Insurance
Disability Insurance
Flexible Spending Account (FSA)
Health Savings Account (HSA)
Performance Bonus
Family Medical Leave
Paid Holidays
FUNDING
SENIORITY LEVEL REQUIREMENT
TEAM SIZE
SALARY RANGE
$187,000/yr - $271,920/yr
EMPLOYMENT TYPE
Full-time, remote
DATE POSTED
March 26, 2026
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