Securely Implementing Snowflake AWS Lambda Integration with Key Pair Authentication + Secrets Manager

Original Japanese article: Snowflake × AWS Lambda連携をKey Pair認証 + Secrets Managerで安全に実装する Introduction I'm Aki, an AWS Community Builder (@jitepengin). When building data pipelines and business systems on AWS, there are cases where you need to access Snowflake directly as part of your application processing. For example, the following use cases are common: Load data received via an API into Snowflake Execute SQL on the Snowflake side after ETL / ELT processing is completed Write results from external system integrations into Snowflake Trigger Snowflake stored procedures as part of task execution AWS Lambda works extremely well with serverless, event-driven processing, and by combining it with Snowflake, you can build a highly flexible data integration platform. On the other hand, when connecting from Lambda to Snowflake, it is critically important to determine how authentication credentials should be managed securely. As of 2026, for Snowflake system integrations, Key Pair authenticatio