Klaviyo · 2 hours ago
Software Engineer II - Custom Objects
Boston, MA
Full-time
Onsite
Mid Level
$116K/yr - $174K/yr
3+ years expKlaviyo is a company that empowers creators to own their destiny by making first-party data accessible and actionable. They are seeking a Software Engineer II for their Custom Objects team to build and scale systems that enable customers to define and manage their own data models, enhancing personalization and analytics capabilities.
AdvertisingAnalyticsE-CommerceMarketing AutomationSoftware
Responsibilities
Design, build, and maintain services that power the Custom Objects platform
Implement APIs and data pipelines for creating, updating, and querying custom object data
Work with evolving schemas while maintaining backwards compatibility and data integrity
Collaborate with Product, Events, Profiles, and Analytics teams to integrate custom objects into the broader platform
Debug and improve performance of data-heavy systems operating at scale
Participate in code reviews, design discussions, and on-call rotations
Contribute to improving operational excellence through better observability and tooling
Qualification
Required
3–6 years of professional software engineering experience
Experience building backend systems in a production environment
Strong fundamentals in data structures, algorithms, and system design
Experience working with databases or data storage systems (relational or distributed)
Ability to reason about correctness, tradeoffs, and edge cases in stateful systems
Strong communication skills and comfort working with cross-functional partners
Preferred
Experience with schema-driven or user-defined data models
Familiarity with distributed systems and high-throughput services
Experience working with Python or similar backend languages
Exposure to cloud infrastructure (AWS preferred)
Experience supporting both online and analytical workloads
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