How do you move data from one service to another?

Moving data between services typically involves a combination of extraction, transformation, and loading (ETL). I start by determining the source and destination APIs or storage systems. For batch transfers, I use tools like AWS Glue, Azure Data Factory, or custom scripts that read from the source, apply necessary transformations (e.g., schema mapping, data cleansing), and write to the destination using bulk upload APIs or COPY commands. For real‑time movement, I set up streaming pipelines with Kafka or Kinesis, where producers push data to topics and consumers write to the target service. I also consider data consistency: using idempotent writes, transaction logs, or change data capture (CDC) to avoid duplicates. Security is handled by encrypting data in transit (TLS) and at rest, and by managing credentials with secrets managers. Finally, I monitor throughput, latency, and error rates, and implement retries or dead‑letter queues to handle failures.