Senior Systems Engineer - Salesforce Integrations

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

Benefits offered by this job

Healthcare benefits

401(k) retirement

Professional development stipend

Flexible time off

AI productivity tools

Job summary

Klaviyo is seeking a Senior Systems Engineer for the GTM Systems Partner team in the U.S. This role owns enterprise Salesforce solutions and GTM integrations end-to-end, including Apex, LWC, Flow, and external partner portals, while ensuring secure data pipelines with partner management and payment systems.

You will champion git-based development, leverage AI productivity tools, and uphold a high bar for code quality through PR reviews and mentorship.

Qualifications

• Senior Systems Engineer or Senior Salesforce Developer with enterprise GTM software experience.
• Hands-on Salesforce development across Apex, LWC, Flow, SOQL/SOSL, and APIs (REST/SOAP).
• Designing, building, and maintaining multi-system integrations between Salesforce and external portals or payment tools.
• Proficiency with GitHub, automated CI/CD pipelines, unit testing, and PR-based governance.
• Active use of AI coding assistants in daily workflows.

Responsibilities

• Deliver scalable Salesforce solutions using Apex, LWC, and Flow.
• Build secure GTM integrations between Salesforce and partner portals and payment data.
• Enforce code quality through PR reviews, tests, and governance.
• Triage and resolve data and platform issues; communicate status to Product Owners.
• Collaborate with Product Owners and Architects during story refinement to size stories and define acceptance criteria.
• Mentor junior engineers in git-based workflows and Salesforce best practices, using AI tools to speed delivery.

Skills

Salesforce Apex

LWC

Salesforce Flow

SOQL/SOSL

REST/SOAP APIs

GitHub

CI/CD

Unit Testing

Data Governance

AI tooling

Job description

At Klaviyo, our GTM Systems team powers the operational engine that connects marketing, sales, partnerships, and customer success. We build and maintain the foundational systems that allow our go-to-market teams to move quickly and trust their data.

As a Senior Systems Engineer on the GTM Systems Partner team, you will own enterprise Salesforce solutions and GTM integrations end-to-end. In this high-ownership role, you will build and maintain features across the Salesforce platform—including Apex, Lightning Web Components (LWC), Flow, and external-facing partner portals - while managing secure data pipelines connecting partner management and payment systems. You will champion git-based development practices, leverage AI productivity tooling, and hold a high bar for code quality through pull request reviews and mentorship.

Key Responsibilities

• Salesforce Solution Delivery: Design, develop, and deploy scalable Salesforce solutions using Apex, Lightning Web Components (LWC), and Salesforce Flow, applying clean code principles (DRY, SOLID, KISS).
• GTM & Partner Integrations: Build and manage secure integrations between Salesforce and the broader GTM stack, including the external partner portal, partner management engines, and payment platform data.
• Code Quality & Governance: Enforce software engineering standards through GitHub-based pull request reviews, automated testing, and strict access/permission governance models.
• Incident Triage & Platform Health: Triage, debug, and resolve high-impact data and platform issues quickly, communicating status updates clearly to Product Owners and stakeholders.
• Agile Refinement & Sizing: Partner with Product Owners and Architects during story refinement to surface technical constraints early, size user stories accurately, and define acceptance criteria.
• AI Tooling & Mentorship: Utilize modern AI tools in daily workflows to accelerate delivery and automate repetitive tasks; mentor junior engineers in git-based workflows and Salesforce best practices.

Requirements

Salesforce Engineering & Systems Depth

• Proven experience as a Senior Systems Engineer or Senior Salesforce Developer building and operating enterprise GTM software stacks.
• Deep hands-on development expertise across the Salesforce platform: Apex, Lightning Web Components (LWC), Salesforce Flow, SOQL/SOSL, and platform APIs (REST/SOAP).
• Strong track record of designing, building, and maintaining multi-system integrations connecting Salesforce to external web portals, partner management systems, or financial/payment tools.
• High proficiency with modern software engineering practices: git/GitHub version control, pull requests, automated CI/CD deployment pipelines, and unit testing.
• Demonstrated commitment to software design principles (SOLID, DRY, KISS) and data governance/security standards.
• Active integration of AI coding assistants and automation tooling in daily engineering workflows.

Work Logistics

• Ability to travel up to 10% for team onsite meetings, onboarding, and industry events.

Preferred Qualifications

• Experience supporting GTM partner engines, channel sales workflows, or external partner portal architectures.
• Formal Salesforce certifications (e.g., Salesforce Certified Platform Developer I/II, Integration Architect, or System Architect).
• Familiarity with enterprise iPaaS tools (e.g., Workato, MuleSoft, Tray.io) or custom middleware microservices.

Total Rewards & Benefits

• Compensation & Equity: Base salary of $116,000 - $174,000 USD + participation in annual cash bonus plan + competitive equity grants.
• Comprehensive Healthcare: Robust medical, dental, and vision insurance options for employees and eligible dependents.
• Financial Security & Retirement: 401(k) retirement savings plan, life insurance, and disability coverage.
• Workplace Culture & Perks: Professional development stipends, flexible time off, and access to modern AI productivity tooling.