SQL & XML Data Operations Platform

DataOps Command Center is a full-stack demo built for a Senior Operations & Maintenance Engineer role. It showcases five integrated capabilities: a SQL Console that executes complex JOINs, subqueries, GROUP BY aggregations, reconciliation queries, and performance-tuning EXPLAIN plans against an in-memory relational dataset of 500 transactions, 100 customers, and 1,200 audit log rows; an XML Ingestion Pipeline using native DOMParser to parse, validate, transform, and load financial transaction feeds and system event logs with schema error detection; a Batch Job Monitor displaying 8 scheduled ETL/archival jobs with live rerun functionality and per-job execution logs; a Data Reconciliation engine that compares source and target datasets field-by-field, flags mismatches and missing records, and generates automated root-cause analysis reports; and a System Monitor with animated CPU/memory/connection charts, live log streaming with severity filtering (Splunk-style), active alert management, and a data governance compliance panel covering audit trails, PII masking, and change control. The responsive dark-themed UI targets web, Android (Chrome), and iOS (Safari) with touch-friendly navigation — directly aligned with all required O&M qualifications in the job description.