April 2025 monthly summary focusing on key accomplishments and business value. Key feature delivered: Custom Map Validation for Data Integrity in the eugenp/tutorials repository. This adds a Spring Validator for Map<String, String>, with rules for key length and value presence, plus a service to process maps and a wrapper to enable standard Bean Validation annotations. Commits tied to this work include 61b73adf07d0f3101adbd623a9903e60b5d8ee59 (BAEL-8582). No critical bugs reported this month; minor stabilization and code hygiene improvements around the new validation feature. Overall impact: strengthens data integrity at the input layer, reduces propagation of invalid map data, and establishes a reusable validation component for future map-like structures. Technologies/skills demonstrated: Spring Validator, Bean Validation integration, custom validation logic for Map<String, String>, service-layer design, wrapper patterns, Java/Spring. Business value: improved data quality at the API/DTO boundary, lowering downstream errors and accelerating data-driven decision making.