Software Engineer with strong ETL experience to design and build data transformations at 3Core Systems, Inc. Focusing on file-to-table data transformations using IBM InfoSphere DataStage.
Responsibilities
Design, develop, and maintain IBM DataStage ETL jobs that ingest file feeds (CSV, fixed-width, delimited) and load curated destination tables in SQL Server.
Build end-to-end ETL flows, including staging, transformations, validations, and publishing to downstream schemas.
Perform source-to-target mapping and implement transformation logic based on business and technical requirements.
Use common DataStage stages and patterns (e.g., Sequential File, Transformer, Lookup, Join/Merge, Aggregator, Sort, Funnel, Remove Duplicates), with attention to partitioning and parallel job design.
Write, optimize, and tune SQL Server queries, stored procedures, and T?SQL scripts used in ETL workflows.
Implement restartable and supportable jobs: parameterization, robust logging, reject handling, auditing columns, and reconciliation checks.
Apply data quality controls (format checks, referential checks, null/duplicate checks, threshold checks) and produce clear exception outputs for remediation.
Monitor and troubleshoot ETL runs using DataStage Director/Operations Console and SQL Server tooling; perform root-cause analysis and fix defects.
Improve performance through job design tuning (partitioning strategy, sorting choices, buffering, pushdown where appropriate) and SQL tuning (indexes, statistics, set-based logic).
Requirements
Hands-on IBM DataStage ETL development experience, including data mapping and transformation implementation.
Strong SQL Server experience with advanced T?SQL (joins, window functions, CTEs, temp tables, indexing basics, query plans).
Solid understanding of file-based ingestion and parsing (CSV, fixed-width, headers/trailers, control totals, encoding, delimiters, quoting/escaping).
Experience designing ETL jobs with good operational characteristics: parameter-driven design, logging, error handling, restart/re-run strategy, and auditability.
Ability to troubleshoot data issues end-to-end (source file – stage tables – target tables) and communicate findings clearly.
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