✦ Luna Orbit — Software Engineering

Sr. Lead Software Engineer - Messaging Infrastructure

at Klaviyo

📍 Boston, MA Onsite Posted March 31, 2026
Apply Now → ← Browse All Jobs

Position Details

Type Not Specified
Experience lead
Exp. Years Not specified
Education Not specified
Category Software Engineering

About this role

Klaviyo seeks a Senior Lead Software Engineer for Messaging Infrastructure to own the architecture, health, and scale of high-volume message delivery across channels, partnering with product managers and other stakeholders.

Key Responsibilities

  • Technical Strategy: Define the architectural vision for the Messaging Infra platform
  • System Architecture and Improvement: Build high-volume message delivery systems across channels
  • Cohesive Technical Vision: Drive architectural decisions across teams
  • Platform Rollouts and Product Execution: Manage releases and lifecycle
  • Problem Solving and Reliability: Monitor and address performance issues

Technical Overview

Role emphasizes defining technical strategy, architectural leadership, platform rollout planning, and cross-team collaboration to build a scalable, reliable messaging platform.

Ideal Candidate

The ideal candidate is a senior lead software engineer with a proven track record architecting and delivering high-volume, multi-channel messaging platforms, and who can mentor other engineers while driving cross-team architectural decisions.

Must-Have Skills

Senior Lead Software EngineerTechnical leadershipArchitecture for high-volume messagingCross-channel platform experienceMentorship of engineers

Nice-to-Have Skills

Experience with messaging channels (emailSMS/MMS/RCSpushWhatsApp)Delivery of major software releasesExperience across channels and compliance

Required Skills

Senior Lead Software EngineerMessaging Infraarchitecturescalabilitymulti-channel messagingreliabilityplatform strategymentorshipcross-functional collaboration

Hard Skills

High-volume messagingArchitecturePlatform strategyMulti-channel messagingReliability engineeringSystem designMentorshipCross-functional collaboration

Soft Skills

Technical leadershipExecutive communicationMentorshipProblem solvingCollaboration

Industry & Role

Industry SaaS
Job Function Lead architecture and technical direction of Klaviyo's Messaging Infra to deliver scalable, reliable, low-latency messaging across channels.
Role Subtype senior lead

Keywords for Your Resume

Senior Lead Software EngineerMessaging InfraKlaviyoBostononsitehigh-volume message deliverychannelsemailSMSMMSRCSpushWhatsAppreliabilityscalabilitylow latencyplatform strategytechnical leadershipmentorshipcross-functional collaborationproduction environmentshigh-volume messagingarchitecturemulti-channel messagingreliability engineeringproduction systemsleadershiptechnical strategy

Deal Breakers

Lack of experience with large-scale messaging systems, Inability to lead and mentor engineers, Unwillingness to operate onsite in Boston

Apply for this Position →

Get matched to jobs like this

Luna finds roles that fit your skills and career goals — no endless scrolling required.

Create a Free Profile