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Staff Backend Engineer – Calendar Integrations

2 hours, 6 minutes ago
India
Full-time
Lead
Backend Engineer
Software Development
Microservices OAuth
Apply Now
HighLevel

HighLevel

HighLevel provides an all-in-one sales and marketing platform that agencies can white label and resell, offering tools and resources designed to help businesses consolidate their marketing efforts and achieve their growth objectives.

Internet Software & Services
251-1K
Founded 2018
$60M raised
View All Jobs 111

Description

  • Architect and evolve a plugin-based integrations marketplace for calendars, conferencing tools, CRMs, and productivity apps.
  • Design and own a high-scale, multi-tenant sync engine for providers such as Google, Outlook, Apple Calendar, Zoom, and Teams.
  • Implement delta synchronization pipelines using provider-specific mechanisms such as Google Sync Tokens, Microsoft Delta Queries, and CalDAV/WebDAV.
  • Define and maintain a normalized cross-provider event model, including recurrence, attendees, reminders, and conferencing data.
  • Ensure standards compliance with iCalendar (RFC 5545), ICS formats, RRULE logic, and timezone rules.
  • Build resilient, idempotent workflows with retries, backoff, dead-letter queues, and replay-safe operations.
  • Develop sync health scoring, drift detection, self-healing, and recovery systems.
  • Create integration SDKs, OAuth flows, webhooks, and debugging tools for partner and third-party developers.
  • Lead architecture reviews, RFCs, and cross-team technical strategy with Scheduling, Platform, AI, Experience, and SDET teams.
  • Mentor engineers and raise engineering quality through hands-on guidance, design leadership, and best practices.

Requirements

  • 8+ years of backend or platform engineering experience, including 2+ years in a technical leadership role.
  • Deep experience designing integration systems, APIs, SDKs, or plugin architectures.
  • Proven ability to lead cross-functional, platform-level initiatives with strong attention to developer experience.
  • Experience with authentication flows, webhook systems, and sandbox environments for developers.
  • Strong understanding of security, scalability, and extensibility in multi-tenant or developer platform environments.
  • Excellent communication skills and the ability to lead a team through ambiguity with clarity.
  • Passion for building tools that enable and empower other developers.
  • Preferred: experience building marketplaces, developer platforms, or app stores.
  • Preferred: familiarity with OAuth2, scoped permissions, event hooks, and audit trails.
  • Preferred: prior experience integrating with calendar or scheduling APIs such as Google or Outlook.

Benefits

  • Remote-first work environment with team members across 15+ countries.
  • Opportunity to work on a platform supporting over 2 million businesses and operating at massive scale.
  • Equal Opportunity Employer with a formal, compliance-oriented hiring process.
  • Use of AI tools in parts of the hiring process, with final decisions made by humans.

Interested in this position?

Apply directly on the company website

Apply Now

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