• Optimized the SQL database by identifying and resolving a query bottleneck related to table joins, reducing averagequery runtime by 20% and improving report generation time by 15 minutes, leading to faster decision-making.• Increased test coverage from 70% to 95% by introducing comprehensive unit and integration tests, leading to a 30%reduction in production bugs and enhanced code reliability.• Implemented a binary search algorithm to replace a less efficient linear search, increasing algorithm efficiency by15% and reducing response times from 1.5s to 1.2s, which significantly improved the user experience.• Proposed and negotiated the inclusion of additional data metrics during cross-functional team meetings, whichexpanded the scope of the project and resulted in more comprehensive business insights.