Worked on the apache/spark repository to address stability issues in Spark’s analysis path for nested queries. Focused on backend development using Scala, the work involved delivering a targeted bug fix that ensured the AnalysisContext was preserved during nested query executions, preventing it from being inadvertently reset. This change improved the reliability of query analysis, particularly for complex analytics workflows involving nested plans. The approach emphasized clear commit traceability and careful handling of Spark’s internal context management. No new features were introduced during this period, but the bug fix contributed to more robust data analysis capabilities within the Spark platform.