Outcomes in production. Not in a deck.

A tier-one national operator needed to retire a 22-year billing repository on proprietary end-of-life hardware. Legal discovery, customer service, and ComReg access required zero interruption during the migration. The system held 1.4 billion records with no documented schema.

Irish Guru reverse-engineered the undocumented schema, designed a three-stage validation pipeline (extract, validate, secure load), and ran parallel systems for 8 weeks before final cutover. All 1.4 billion records were migrated with full audit trails and ISO-compliant access schemas established across the decommissioned estate.

A mid-tier Irish retail bank was releasing to production once every three weeks due to manual change-approval processes, inconsistent test coverage, and an absence of automated security scanning. CBI and DORA readiness requirements were pushing the urgency of a delivery transformation.

Irish Guru embedded a principal DevSecOps engineer for 16 weeks. We rebuilt the release pipeline on Azure DevOps, integrated Snyk and SonarQube into automated gates, established a secrets management layer with HashiCorp Vault, and worked with the bank's change board to reform the approval process without losing compliance controls.