# Tech Stack

| Software       | Version                  |
| -------------- | ------------------------ |
| Java           | 11                       |
| Scala          | 2.11                     |
| Cassandra      | 3.11.6                   |
| Elastic Search | 6.8.11                   |
| Redis          | 4.0                      |
| Kafka          | 2.4.1                    |
| Flink          | 1.13.5 (with Scala 2.12) |