Klaviyo · 1 day ago
Software Engineer II - API
Boston, MA
Full-time
Hybrid
Mid Level
$120K/yr - $180K/yr
3+ years expKlaviyo is a growing company that empowers creators to own their own destiny through innovative technology. The Software Engineer II - API role involves contributing to the development of public and internal API platforms, collaborating with product owners and engineering peers, and participating in code reviews to deliver high-quality solutions.
AdvertisingAnalyticsE-CommerceMarketing AutomationSoftware
Responsibilities
Contribute to the evolution of Klaviyo’s public and internal API platforms
Participate in code reviews, product specifications, and scope definition
Collaborate with product owners and engineering peers to deliver high-quality, scalable solutions
Influence the direction and priorities of the API team
Qualification
Required
3–5+ years of experience in software engineering
Experience working with both monolithic and microservices architectures
Experience with CI/CD pipelines
Strong debugging and performance optimization skills
Preferred
Experience with metaprogramming
Experience with Go
Familiarity with JSON:API
Experience designing and building internal or public APIs
Experience with Service-Oriented Architecture (preferably in Python)
Experience working with RESTful applications, APIs, or gRPC
Benefits
Participation in the company’s annual cash bonus plan
Variable compensation (OTE) for sales and customer success roles
Equity
Sign-on payments
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
2025-12-16
Company data provided by crunchbase