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Software Engineer II, Data Lake

Klaviyo

Salary not specified
Nov 12, 2025
Boston, MA, US
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Klaviyo is looking to solve the problem of building, owning, and scaling features end-to-end from scratch, and breaking through any obstacle or technical challenge in their way, specifically in the context of their real-time and offline data analytics platform.

Requirements

  • Hands on with Python and SQL, with experience in backend development
  • Experience with distributed data processing frameworks such as Apache Spark and Flink
  • Proven track record of designing and implementing scalable ETL/ELT pipelines, ideally using AWS services like EMR
  • Strong knowledge of cloud platforms, particularly AWS (e.g., EMR, S3, Redshift), and optimizing data workflows in the cloud
  • Experience with data pipeline orchestration tools like Airflow
  • Familiarity with real-time data streaming technologies such as Kafka or Pulsar
  • Understanding of data modeling, database design, and data governance best practices

Responsibilities

  • Implement scalable, fault-tolerant data pipelines using distributed processing frameworks like Apache Spark and Flink on AWS EMR, optimizing for throughput and latency
  • Design batch and real-time, event-driven data workflows to process billions of data points daily, leveraging streaming technologies like Kafka and Flink
  • Optimize distributed compute clusters and storage systems (e.g., S3, HDFS) to handle petabyte-scale datasets efficiently, ensuring resource efficiency and cost-effectiveness
  • Develop robust failure recovery mechanisms, including checkpointing, replication, and automated failover, to ensure high availability in distributed environments
  • Optimize data storage and processing systems to handle petabyte-scale datasets efficiently, ensuring performance and cost-effectiveness
  • Collaborate with cross-functional teams to deliver actionable datasets that power analytics and AI capabilities
  • Implement data governance policies and security measures to maintain data quality and compliance

Other

  • 4+ years of experience in software development, with at least 2 years focused on data engineering and distributed systems
  • Bachelor's degree in Computer Science, Engineering, or a related field, or equivalent experience
  • Strong communication skills with experience mentoring or leading engineering teams
  • Excellent problem-solving skills and the ability to thrive in a fast-paced, collaborative environment
  • You've already experimented with AI in work or personal projects, and you're excited to dive in and learn fast