Technology stack

Criteria

The technology stack has been chosen based on the following criteria:

• Existing Home Office use
• Ability to reuse existing services (HO and X-GOV)
• Cabinet Office Technology Code of Practice
• Project requirements
• Team skillset

Microservices

• Java
• Spring Boot
• Spring Data (JPA)
• Flyway (database migration) scripts

Frontend

• NodeJS
• ReactJS

Databases

• Postgres (AWS RDS)
• H2SQL (in memory for testing)
• Flyway (for migrations)

Workflows

• BPMN (Business Process Model and Notation) via Camunda

Integration

• Apache Camel
• AWS SQS
• AWS SNS

Search

• Elastic Search (AWS)

Documents

• JODConverter (Java API to orchestrate LibreOffice)
• LibreOffice (for document conversion)
• ClamAV

Testing

• Selenium for acceptance tests

Other

• GitHub Actions
• Keycloak (ADFS)