Technology

1. Java 8 (https://www.oracle.com/java/technologies/java8.html)

2. Apache Kafka (https://kafka.apache.org/)

3. Keycloak (https://www.keycloak.org/)

4. Postgres(https://www.postgresql.org/)

5. Zuul (https://github.com/Netflix/zuul)

6. MongoDB (https://www.mongodb.com/)

7. Apache Druid (https://druid.apache.org/)

8. Metabase (https://www.metabase.com)