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ETL Developer (Legacy ETL Expert)

ETL Developer
Onsite
Contract
Kuningan, South Jakarta

Job Description

* Industry: Telecommunications (Telco)

* Location: Kuningan, South Jakarta

Job Summary

We are looking for an experienced Senior ETL Developer to join a large-scale data migration project in the telecommunications industry. This role focuses on analyzing existing Legacy ETL systems, reverse-engineering business logic, designing modern migration solutions, and guiding the development team in executing project deliverables.

Responsibilities

  • Analyze source code, graphs, and code flows of existing Legacy ETL systems to understand and accurately restore business logic.
  • Perform data profiling and data mapping from legacy source systems to new target systems
  • Design data migration solution architectures and establish effective conversion patterns for high-volume ETL pipelines.
  • Prepare technical documentation, including High-Level Design (HLD), Low-Level Design (LLD), and cutover/migration strategies.
  • Provide technical direction, mentoring, and guidance to the development team throughout the ETL conversion and development process.
  • Conduct regular code reviews and deliverable evaluations to ensure code quality, performance optimization, and adherence to data architecture standards.
  • Collaborate closely with Data Architects, Business Analysts, and Telco Domain Experts to ensure business logic validity and maintain data integrity during migration.
  • Troubleshoot complex technical issues during the extraction, transformation, and loading (ETL) phases.

    • Requirements

  • Minimum 3-5+ years of hands-on experience in ETL Development & Data Migration projects.
  • Bachelor’s degree or higher in Computer Science, Information Technology, Software Engineering, or a related field.
  • Proven experience in Legacy ETL projects (graph/code flow/source code analysis & logic restoration).
  • Strong capability in migration solution design and conversion patterns.
  • Ability to guide the development team and perform technical code/deliverable reviews.
  • Preferred: Experience in solution design for large-scale ETL migration projects (Telco background is a plus).
  • Note: Having trouble submitting your application? You can send your CV directly to santi@merkleinnovation.com.com

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