✦ Luna Orbit — Software Engineering

Software Engineer II - Flows Platform

at Klaviyo

📍 Boston, MA Onsite Posted March 18, 2026
Type Full-Time
Experience mid
Exp. Years 3+ years
Education Not specified
Category Software Engineering

Klaviyo is hiring a mid-level Software Engineer II to develop and maintain the core event processing engine that supports automated lifecycle programs at massive scale.

  • Build core event engine
  • Implement scalable scheduling and filtering
  • Ensure system reliability
  • Optimize performance at scale
  • Collaborate on infrastructure improvements

The role involves backend development with Python and Django, designing event-driven architectures, managing high-scale data stores, and ensuring system reliability and performance.

The ideal candidate is a mid-level backend engineer with over 3 years of experience in Python and Django, skilled in building core event-driven engines, managing high-scale infrastructure, and ensuring system reliability.

PythonDjangobuilding core engineevent-driven logicschedulinghigh-scale infrastructurereliability3+ years experience
distributed systemsperformance tuningcloud infrastructureautomation
PythonDjango
PythonDjangoevent-driven architecturescheduling systemshigh-scale infrastructuredata storesbackend systemsreliability engineering
PythonDjangoEvent-driven architectureScheduling systemsHigh-scale infrastructureData storesBackend systemsReliability engineering
problem-solvingcollaborationcommunicationanalytical thinkingteamwork
Industry SaaS
Job Function Developing and operating core backend systems for automated marketing workflows
Role Subtype Backend Engineer
Tech Domains Python, Django, Event-driven architecture
Software EngineerPythonDjangocore engineevent-driven architecturescheduling systemshigh-scale infrastructurereliability engineeringbackend systemsdata storesautomationperformance tuningschedulingreliability

Less than 3 years experience, No Python or Django experience, Lack of backend or event-driven architecture knowledge, On-site only without remote options

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