Klaviyo

About the Company

Klaviyo is the only CRM built for B2C Brands. Powered by its built-in data platform and AI insights, Klaviyo combines marketing automation, analytics, and customer service into one unified solution. With your data all in one place, you can know, engage, and grow your audience like never before.

Powered by its built-in data platform and AI insights, Klaviyo combines marketing automation, analytics, and customer service into one unified solution, making it easy for businesses to know their customers and grow faster. Klaviyo (CLAY-vee-oh) helps relationship-driven brands like Mattel, Glossier, Core Power Yoga, Daily Harvest and 167,000+ others deliver 1:1 experiences at scale, improve efficiency, and drive revenue.

Listed Jobs

Company Name

Klaviyo

Job Title

Software Engineer

Job Description

**Job title** Software Engineer – Backend Data Ingestion **Role Summary** Design, implement, and optimize scalable, fault‑tolerant data ingestion pipelines that process billions of events daily. Own end‑to‑end data workflows, ensuring high availability, low latency, and cost efficiency across real‑time and batch systems. Collaborate with product, infrastructure, and data science teams to deliver reliable, actionable datasets that power analytics and AI features. **Expectations** - 4+ years of software engineering, 2+ in data‑intensive or distributed systems. - Strong Python, SQL, and backend development skills. - Experience with distributed data frameworks (Spark, Flink), streaming (Kafka, Pulsar), and orchestration (Airflow). - Cloud‑native pipeline design, preferably on AWS. - Knowledge of data modeling, storage optimization, and governance. - Ability to work in fast‑paced, cross‑functional environments. **Key Responsibilities** - Build and tune high‑scale ingestion, batch, and streaming pipelines (Spark, Flink). - Design and maintain real‑time and batch ETL/ELT workflows with Airflow. - Implement fault‑tolerance, monitoring, and recovery for production data pipelines. - Optimize compute and storage for performance and cost. - Ensure data integrity, governance, and compliance across data stores (MySQL, S3, Redshift). - Collaborate with product, infrastructure, and ML teams to deliver clean, timely data. - Mentor peers and contribute to platform‑wide technical direction. **Required Skills** - Python (Node.js or Java a plus) - SQL, backend development frameworks - Distributed data processing: Apache Spark, Apache Flink - Streaming: Kafka, Apache Pulsar - Workflow orchestration: Airflow - Cloud platforms: AWS (EMR, Lambda, S3, Redshift) - Kubernetes, container orchestration - Data modeling, storage optimization, governance best practices - Strong problem‑solving, collaboration, and communication skills **Required Education & Certifications** - Bachelor’s degree in Computer Science, Engineering, or related field (or equivalent experience). - Relevant certifications in cloud or data engineering are a plus.

Boston, United states

Hybrid

Junior

12-11-2025

Company Name

Klaviyo

Job Title

Senior Product Manager - Self-Hosted Ecomm Integrations

Job Description

Job title: Senior Product Manager – Self‑Hosted E‑commerce Integrations Role Summary: Lead product strategy, execution, and outcomes for Klaviyo’s first‑party integrations with Magento 2, Salesforce Commerce Cloud, WooCommerce, and PrestaShop. Own the roadmap, deliver high‑impact features, and mentor junior PMs. Expectations: Deliver measurable business results through prioritized roadmap, deep customer advocacy, analytical problem‑solving, and clear communication. Mentor co‑level PMs and elevate product excellence standards. Key Responsibilities: • Own and prioritize roadmap for self‑hosted integrations • Write detailed specs and ship iterations rapidly • Collaborate cross‑functionally (engineering, research, design, sales, partners) • Mentor and coach junior PMs • Engage with merchants, partners, and support to surface customer needs • Continually deepen expertise in self‑hosted e‑commerce platforms and extensibility • Align on strategic priorities with external partners • Drive data‑driven decisions and monitor impact metrics Required Skills: • 5–7+ years PM experience with technical/infrastructure products • Proven end‑to‑end product ownership & measurable outcomes • Strong technical expertise: REST APIs, webhooks, authentication, data pipelines, cloud architecture • Experience in extensible B2B SaaS products integrating across ecosystems • Enterprise/upmarket merchant focus • Partner collaboration & strategic alignment • Exceptional written and verbal communication • Self‑starter with bias for action and resourcefulness Required Education & Certifications: • Bachelor’s degree in Computer Science, Engineering, Business, or equivalent; MBA or relevant certifications desirable but not mandatory.

Boston, United states

On site

Senior

29-12-2025

Company Name

Klaviyo

Job Title

Senior Product Manager - Events

Job Description

**Job Title:** Senior Product Manager – Events **Role Summary:** Lead strategy, roadmap, and execution for the Events team within the Data Infrastructure pillar, owning the design and optimization of Klaviyo’s event data platform. Drive scalable, high‑performance data solutions that enable analytics, personalized messaging, and downstream use cases for a B2C CRM ecosystem. **Expectations:** - 4+ years of product management experience, preferably with technical/infrastructure products. - Deep understanding of data architecture, event‑driven systems, and query optimization. - Ability to balance technical depth with business impact and influence cross‑functional teams. - Strong written and verbal communication; capable of documenting complex systems clearly. - Commitment to mentorship of junior product managers and knowledge sharing. **Key Responsibilities:** - Define and own the Events product roadmap and strategy. - Optimize event query performance, storage costs, and reliability. - Analyze internal data usage patterns to shape scalable event data strategies. - Partner with R&D, analytics, and other data teams to evolve the event model and align with overall data architecture. - Deliver measurable business impact by improving platform scalability and processing efficiency. - Engage with Support during onboarding to understand customer pain points. - Coach and mentor other product managers as the team matures. **Required Skills:** - Product management lifecycle expertise (discovery, prioritization, delivery). - Proficiency with databases, data lakes, distributed stores (e.g., ClickHouse). - Experience in query analysis, optimization, and event‑driven architecture. - Strong analytical, problem‑solving, and data‑driven decision‑making abilities. - Excellent stakeholder management and influencing skills. - Passion for building scalable, efficient infrastructure products. **Required Education & Certifications:** - Bachelor’s degree in Computer Science, Engineering, Business, or related field (or equivalent practical experience). - No specific certifications required; advanced technical training or certifications in data engineering or product management are a plus.

Boston, United states

On site

Senior

30-12-2025

Company Name

Klaviyo

Job Title

Senior Software Engineer, Internationalisation Platform

Job Description

Job title: Senior Software Engineer, Internationalisation Platform Role Summary: Lead design, development, and maintenance of the i18n platform handling translations, localization features, multi‑currency support, and LLM‑driven workflows across front‑end and back‑end services. Mentor junior engineers, own full feature lifecycle, and collaborate with cross‑functional teams to shape product direction. Expactations: • Deliver high‑quality, customer‑facing software with a focus on internationalization and localization. • Own complex, multi‑component projects, set technical standards, and ensure system scalability, reliability, and performance. • Mentor and interview junior engineers, contribute to operational health (SLOs), and support on‑call responsibilities. Key Responsibilities: • Design and implement end‑to‑end i18n features, including translation pipelines, new localization tools, and smart translation services. • Own the full lifecycle of features: requirement refinement, architecture, coding, testing, deployment, and monitoring. • Observe, debug, and optimize system performance for high query volumes and distributed workloads. • Collaborate with product, design, and localization teams to influence feature requirements and technical constraints. • Mentor junior engineers, conduct code reviews, and participate in hiring activities. • Maintain operational excellence, define and monitor SLOs, and drive continuous improvement in the platform. Required Skills: • 5+ years of software engineering delivering production‑grade, customer‑facing services. • Strong systems thinking, experience with large‑scale distributed or microservices architectures. • Full‑stack development knowledge (React, TypeScript, JavaScript, and related front‑end/back‑end tooling). • Database design for high‑volume query workloads; performance tuning and debugging. • Proficiency in internationalization and localization concepts, including language support and multi‑currency systems. • Ability to design and evolve scalable architectures; experience with AWS or similar cloud platforms. • Excellent communication, collaboration across teams, and mentorship abilities. Required Education & Certifications: • Bachelor’s degree in Computer Science, Software Engineering, or related field (or equivalent experience). • Relevant certifications (e.g., AWS Certified Developer) are a plus.

London, United kingdom

Hybrid

Senior

12-01-2026