Klaviyo · 5 hours ago
Lead Software Engineer - Email Platforms
Boston, MA
Full-time
Hybrid
Lead/Staff
$188K/yr - $282K/yr
8+ years expKlaviyo is a company that empowers creators to own their destiny by making first-party data accessible and actionable. The Lead Software Engineer will lead a team focused on designing and scaling high-throughput email delivery systems, driving the architecture of the messaging infrastructure, and contributing directly to code and design.
AdvertisingAnalyticsE-CommerceMarketing AutomationSoftware
Responsibilities
Lead a team of engineers building and scaling Klaviyo's email delivery infrastructure
Own and drive the architecture of key components in the email pipeline
Design and implement scalable, high-throughput services in Go and Python
Build systems that manage message queues and ensure reliable email delivery at scale
Contribute directly to architecture and code, driving best practices and quality
Collaborate cross-functionally to ensure the highest standards of performance, reliability, and deliverability
Grow and mentor engineers while helping shape the future of email infrastructure at Klaviyo
Transform workflows by putting AI at the center, building smarter systems and ways of working from the ground up
Qualification
Required
8+ years of engineering experience with strong backend and systems design skills
Proficient in Go and Python (required)
Comfortable coding and reviewing complex systems — this is a hands-on role
Experienced working with high-throughput distributed systems
Familiar with message queues (e.g., Pulsar, Kafka, RabbitMQ, SQS)
Skilled in system design and scaling infrastructure using AWS
Clear communicator and collaborative team player
Able to thrive in a hybrid team(with some remote team members) and deliver in a high-autonomy environment
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
Preferred
Experience with email infrastructure, MTAs, deliverability, or mailops
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 (38)
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
2025-12-17
2025-12-16
2025-12-16
Company data provided by crunchbase