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Karrot Improves Conversion Rates by 70% with New Scalable Feature Platform on AWS

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Karrot Improves Conversion Rates by 70% with New Scalable Feature Platform on AWS

Karrot overhauled its recommendation system on AWS, achieving a 70% surge in article conversion rates by decoupling features from legacy infrastructure. The platform now handles 1000+ features across 10+ services, resolving data inconsistencies and scalability bottlenecks.

Why This Matters

Karrot’s legacy system suffered from tight coupling, fragmented data storage, and poor reliability, leading to inconsistent recommendations and scalability limits. The new distributed, event-driven architecture on AWS addresses these by unifying feature storage, enabling real-time ingestion, and supporting dynamic feature computation. Prior issues, such as 30% data inconsistency during content type expansions, were resolved through multi-tier caching and schema normalization.

Key Insights

  • “70% conversion rate increase, 2025”: Achieved via AWS-based feature platform
  • “Probabilistic Early Expirations (PEE) for cache management”: Mitigated cache stampedes and reduced latency
  • “AWS Batch on Fargate for batch ingestion”: Chosen for simplicity over Apache Airflow, though lacking DAG support

Practical Applications

  • Use Case: Karrot’s recommendation engine using AWS services for real-time data processing and batch feature ingestion
  • Pitfall: Over-reliance on single data stores (e.g., Amazon Aurora) caused inconsistencies in legacy architecture

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