Klaviyo · 12 hours ago
Lead Software Engineer - Sending Platform
Boston, MA
Full-time
Hybrid
Lead/Staff
$188K/yr - $282K/yr
8+ years expKlaviyo is a company that empowers creators to own their own destiny by making first-party data accessible and actionable. They are seeking a Lead Software Engineer to lead a team focused on building and operating high-throughput, distributed systems that power message delivery, directly impacting the customer experience.
AdvertisingAnalyticsE-CommerceMarketing AutomationSoftware
Responsibilities
Lead a team of engineers building and evolving Klaviyo’s core messaging and communication platform
Own message ingestion, routing, processing, and delivery pipelines that handle billions of messages at scale
Build and operate highly available, distributed systems that support global traffic, reliability, and performance
Contribute directly to system architecture and code, driving best practices in scalability, resilience, and operational excellence
Collaborate closely with product, infrastructure, and partner teams to enable new channels, use cases, and platform capabilities
Grow and mentor engineers while helping shape the future of Klaviyo’s messaging infrastructure
Transform messaging workflows by putting AI at the center, enabling smarter routing, optimization, and operational decision-making from the ground up
Qualification
Required
8+ years of engineering experience with strong backend skills (Python or Go or Similar)
Comfortable coding and reviewing complex systems — this is a hands-on role
Skilled in system design and scaling infrastructure using AWS
Clear communicator and collaborative team player
Preferred
Experience building developer platforms or internal tooling is a strong plus
You've already experimented with AI in work or personal projects, and you're excited to dive in and learn fast. You're hungry to responsibly explore new AI tools and workflows, finding ways to make your work smarter and more efficient
Benefits
Participation in the company’s annual cash bonus plan
Variable compensation (OTE) for sales and customer success roles
Equity
Sign-on payments
A comprehensive range of health, welfare, and wellbeing benefits based on eligibility
Company
Klaviyo
Klaviyo is an automation and email platform designed to help grow businesses.
1001-5000 employees
H1B Sponsorship
Klaviyo has a track record of offering H1B sponsorships. Please note that this does not
guarantee sponsorship for this specific role. Below presents additional info for your
reference. (Data Powered by US Department of Labor)
Distribution of Different Job Fields Receiving Sponsorship
Represents job field similar to this job
Trends of Total Sponsorships
2025 (47)
2024 (29)
2023 (24)
2022 (27)
2021 (21)
2020 (8)
Funding
Current Stage
Public CompanyTotal Funding
$1.35BKey Investors
ShopifySands Capital VenturesAccel
2025-08-13Post Ipo Secondary· $195.06M
2025-05-14Post Ipo Secondary· $372.95M
2023-09-20IPO
Leadership Team
Andrew Bialecki
CEO
Ed Hallen
Co-Founder, Chief Strategy Officer, Board Member
Recent News
Investing.com
2026-01-03
2025-12-17
Company data provided by crunchbase