Leandre focused on backend development for the DefiLlama/defillama-server repository, addressing a critical data attribution issue for the Spark protocol. Using TypeScript, Leandre updated the protocol’s GitHub username from marsfoundation to sparkdotfi, ensuring that Spark’s ownership was accurately reflected across datasets and dashboards. This fix improved data integrity and governance, reducing the risk of misattribution in analytics and reporting. Leandre traced the change through issue documentation, demonstrating careful attention to traceability and repeatability. The work required strong Git hygiene and collaboration with other teams, resulting in a targeted solution that resolved attribution discrepancies without introducing production disruptions.