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Posted Apr 10, 2026

Software Engineer II (multiple)

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Klaviyo is a company that empowers creators to own their destiny by making first-party data accessible and actionable. They are seeking a Software Engineer II to develop software features, craft scalable data pipelines, and work on analytics systems to support their customers' business needs. Responsibilities - Develop software features that thousands of our customers rely on daily to reach millions of consumers to drive their business forward - Craft highly scalable real-time data pipeline that processes billions of events weekly across data sets growing to petabyte scale - Work on deep analytics system that provides insight into hundreds of terabytes of data - Help architect and design robust and high performance data processing and storage systems leveraging new data bases to serve different internal and external use cases - Contribute to open source data processing technologies - Dig into performance and scalability issues to drive breakthrough solutions - Ship code early & often in an agile fashion, pairing with product management to craft better software by soliciting feedback from thousands of end users Skills - Master's degree in Computer Science, Computer Engineering, Software Engineering, Electronics Engineering, or Electrical Engineering - 1 year of experience in job offered or closely related engineering role - Experience with Distributed system architectures - Experience with Caching technologies including Redis - Experience with Relational Database Management Systems including MySQL - Experience with Connection pooling - Experience with Queuing and streaming technologies like RabbitMQ, Pulsar, or Kafka - Experience with JavaScript Benefits - Participation in the company’s annual cash bonus plan - Variable compensation (OTE) for sales and customer success roles - Equity - Sign-on payments - A comprehensive range of health, welfare, and wellbeing benefits based on eligibility Company Overview - Klaviyo is an automation and email platform designed to help grow businesses. It was founded in 2012, and is headquartered in Boston, Massachusetts, USA, with a workforce of 1001-5000 employees. Its website is http://www.klaviyo.com. Company H1B Sponsorship - Klaviyo has a track record of offering H1B sponsorships, with 9 in 2026, 47 in 2025, 29 in 2024, 24 in 2023, 27 in 2022, 21 in 2021, 8 in 2020. Please note that this does not guarantee sponsorship for this specific role.