Senior GTM Partner Systems Engineer

Klaviyo; Boston (MA); On-site; USD 116,000 - 174,000; Full time

Benefits offered by this job

Annual bonus plan

Equity

Health & wellbeing benefits

Job summary

Klaviyo is seeking a Senior Systems Engineer for the GTM Systems Partner team in Boston, MA. You will own enterprise systems end-to-end, delivering reliable integrations across the GTM stack and maintaining platform health with a focus on quality code.

You will work with Salesforce technologies (Apex, LWC, Flow) and mentor junior developers, using AI tools to improve speed and governance across partner management and payments.

Qualifications

• Experience with Salesforce platform and integrations.
• Strong code quality standards (DRY, SOLID, KISS).
• Ability to own enterprise systems end-to-end from design to delivery.

Responsibilities

• Own delivery of Salesforce solutions from planning through deployment.
• Develop and maintain integrations between Salesforce and the GTM stack.
• Triage and resolve platform and data issues quickly and clearly communicate status.

Skills

Salesforce

Apex

Lightning Web Components

Flow

Integrations

GitHub

AI tools

Mentoring

Tools

GitHub

Job description

At Klaviyo, we value the unique backgrounds, experiences and perspectives each Klaviyo (we call ourselves Klaviyos) brings to our workplace each and every day. We believe everyone deserves a fair shot at success and appreciate the experiences each person brings beyond the traditional job requirements. If you’re a close but not exact match with the description, we hope you’ll still consider applying. Want to learn more about life at Klaviyo? Visit klaviyo.com/careers to see how we empower creators to own their own destiny.

Klaviyo's operational infrastructure, built and managed by our GTM Systems team, powers our GTM engine. We're looking for a Senior Systems Engineer to keep those systems reliable, extensible, and ahead of the business so the teams that depend on them can focus on what they do best.

About The Team

Our GTM Systems team sits at the center of Klaviyo's go-to-market engine, powering the operational infrastructure that connects marketing, sales, partnerships, and customer success. We build and own the systems that enable our teams to move quickly, trust their data, and focus on what matters most: helping our customers grow.

Our GTM Systems Partner team is a small group of technical builders owning the Salesforce platform and its integrations across our full GTM stack — from lead routing and lifecycle management to the external-facing partner portal and its integrations with partner management and payment systems data.

About The Role

As a Senior Systems Engineer on the GTM Systems Partner team, you will own the enterprise systems end-to-end — from understanding the business process, to engineering the right solution, to measuring whether it moved the needle. You will own delivery, platform health, and code quality across a GTM stack — including the external-facing partner portal by sizing and building features, maintaining platform health, and shipping reliable integrations across our GTM stack. This is a high-craft, high-ownership role for someone who wants to write great code, drive quality standards, and see their work translate directly to Klaviyo’s goals.

How You'll Make An Impact

• Own delivery of Salesforce solutions — Apex, Lightning Web Components, Flow, and integrations — from sprint planning through deployment, applying engineering best practices (DRY, SOLID, KISS) and holding a high bar for code quality through GitHub-based pull request reviews.
• Develop and maintain integrations between Salesforce and the broader GTM stack, including the external-facing partner portal; ensure reliable, secure data flows across partner management and payments while prioritizing strict access and permission governance.
• Triage and resolve high-impact platform and data issues quickly, owning the technical fix and communicating status clearly to the Product Owner and business partners.
• Use AI tools as part of your daily engineering workflow to ship faster, explore unfamiliar systems, and automate repetitive work — and help teammates build the same habits.
• Partner with the Product Owner and Architect during story refinement to size work accurately, surface technical constraints early, and ensure stories are fully ready before sprint planning.
• Mentor junior developers through code reviews, engineering standards, and pairing — accelerating the team's shift to professional-grade, git-based development practices.

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.

Base Pay Range For US Locations

$116,000—$174,000 USD

Benefits

• 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.

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.

By participating in Klaviyo’s interview process, you acknowledge that you have read, understood, and will adhere to our Guidelines for using AI in the Klaviyo interview Process. For more information about how we process your personal data, see our Job Applicant Privacy Notice.

Klaviyo is committed to a policy of equal opportunity and non-discrimination. We do not discriminate on the basis of race, ethnicity, citizenship, national origin, color, religion or religious creed, age, sex (including pregnancy), gender identity, sexual orientation, physical or mental disability, veteran or active military status, marital status, criminal record, genetics, retaliation, sexual harassment or any other characteristic protected by applicable law.