Senior Manager, Corporate Development Boston, MA; San Francisco, CA

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At Klaviyo, we believe in the power of technology to help businesses build smarter, more personalized relationships with their customers. As we continue to expand our platform, product capabilities, and global reach, Corporate Development plays an increasingly important role in accelerating our long-term strategy.

We are looking for a Senior Manager, Corporate Development to help shape and execute Klaviyo's inorganic growth strategy, spanning acquisitions, strategic investments, partnerships, and other opportunities that accelerate our product and business ambitions.

Reporting to the Head of Corporate Development, you will serve as a strategic partner to senior leadership while independently driving complex, high‑impact initiatives from initial thesis development through execution and integration. This is a highly visible, hands‑on role with significant autonomy, requiring a unique combination of strategic judgment, financial sophistication, commercial acumen, and the ability to navigate complex transactions across multiple stakeholders.

As Klaviyo's platform and ambitions continue to evolve, you will play a critical role in expanding our ability to identify, evaluate, and execute transformative opportunities. Success requires someone who can operate as both a strategic thinker and an exceptional executor, translating market insights into actionable opportunities and driving transactions forward with speed, precision, and sound judgment.

• Own end-to-end transaction execution: Independently lead acquisitions, strategic investments, and other inorganic initiatives from opportunity identification and initial evaluation through valuation, diligence, negotiation, internal approvals, closing, and integration planning.
• Shape Klaviyo's inorganic growth strategy: Partner with the Head of Corporate Development and executive leadership to identify strategic priorities, assess build/partner/buy opportunities, and develop investment theses aligned with Klaviyo's long‑term product and business objectives.
• Drive sophisticated financial and strategic analysis: Build and evaluate complex financial models, transaction structures, valuations, business cases, and synergy analyses to inform investment decisions and capital allocation.
• Expand deal pipeline and execution capacity: Proactively source, prioritize, and advance multiple opportunities simultaneously, bringing the ownership and operational rigor needed to increase the organization's transaction throughput.
• Influence executive‑level decisions: Develop clear, compelling investment recommendations and present complex strategic, financial, and commercial considerations to senior executives and key decision‑makers.
• Lead cross‑functional deal teams: Coordinate Product, Engineering, Finance, Legal, Security, and other stakeholders through complex diligence and transaction processes, ensuring alignment, accountability, and timely execution.
• Build relationships across the technology ecosystem: Develop and maintain a strong network of founders, investors, advisors, and industry leaders to identify emerging opportunities and strengthen Klaviyo's market presence.
• Evaluate emerging technologies and markets: Assess…