Software Engineer II - Channel Rendering and Engagement

Overview

Klaviyo is looking for a Backend Engineer to support key initiatives that enhance our product offerings and drive company growth. You’ll play a critical part in delivering end-to-end solutions using distributed systems and AI technologies, improving existing products and developing new capabilities that push the boundaries of what’s possible for our customers.

As a Software Engineer II, you’ll tackle complex challenges, explore multiple solutions, and weigh business and technical trade-offs to determine the best path forward. You’ll actively contribute to team discussions and help shape important technology decisions. You’ll also be responsible for shipping well-designed, thoroughly tested solutions that prioritize reliability and performance.

The Channel Rendering & Engagement team builds and runs the core infrastructure that turns Klaviyo’s templates and data into the actual messages customers receive across email, SMS, push, and previews — at massive scale and low latency. We own the high‑performance rendering pipeline, engagement tracking, and compliance-related services. These services collectively ensure that messages are delivered quickly, reliably, and safely, and that every personalized message is rendered correctly, tracked accurately, and meets strict SLOs so the rest of Klaviyo can innovate on top of a rock-solid communications platform.

We work cross-functionally by default. Partnering closely with teams across the organization gives us broad exposure to the product, unblocks other teams, and allows us to drive impact well beyond our immediate scope. The work is fast-moving, varied, and requires constant learning and adaptation.

• Experience with distributed systems
• A proven track record of building high-quality products and systems, with a focus on writing clean, maintainable code
• 3+ years of experience in a software engineering role
• Experience building end-to-end software solutions
• Familiarity with various AI tools that enhance the software development lifecycle
• Familiarity with code reviews and leading or participating in robust testing practices
• Experience working in agile, fast-paced environments

• Python
• Golang
• AWS / knowledge of building cloud-native solutions

Massachusetts Applicants: It is unlawful in Massachusetts to require or administer a lie detector test as a condition of employment or continued employment. An employer who violates this law shall be subject to criminal penalties and civil liability.

Our salary range reflects the cost of labor across various U.S. geographic markets. The range displayed below reflects the minimum and maximum target salaries for the position across all our US locations. The base salary offered for this position is determined by several factors, including the applicant’s job-related skills, relevant experience, education or training, and work location.

In addition to base salary, our total compensation package may include participation in the company’s annual cash bonus plan, variable compensation (OTE) for sales and customer success roles, equity, sign-on payments, and a comprehensive range of health, welfare, and wellbeing benefits based on eligibility.

Your recruiter can provide more details about the specific salary/OTE range for your preferred location during the hiring process.

Base Pay Range For US Locations: $116,000 — $174,000 USD

Get to Know Klaviyo

We’re Klaviyo (pronounced clay-vee-oh). We empower creators to own their destiny by making first-party data accessible and actionable like never before. We see limitless potential for the technology we’re developing to nurture personalized experiences in ecommerce and beyond. To reach our goals, we need our own crew of remarkable creators—ambitious and collaborative teammates who stay focused on our north star: delighting our customers.

If you’re ready to do the best work of your career, where you’ll be welcomed as your whole self from day one and supported with generous benefits, we hope you’ll join us.

AI fluency at Klaviyo includes responsible use of AI (including privacy, security, bias awareness, and human-in-the-loop). We provide accommodations as needed.

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