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).

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Bachelor's degree in CS/IT/SE
ETL Development, Data Migration, Legacy ETL analysis, Mentoring, Code reviews
Analyze source code, graphs, and code flows of legacy ETL systems to restore business logic., Perform data profiling and data mapping from legacy sources to new targets., Design migration architectures and conversion patterns for high-volume ETL pipelines., Prepare HLD, LLD, and cutover/migration strategies., Provide technical direction and mentoring to the development team., Conduct code reviews to ensure quality, performance, and data integrity., Collaborate with Data Architects, BAs, and Telco SMEs to validate logic., Troubleshoot complex ETL issues during extraction, transformation, and loading.

📌 ETL Developer (Legacy ETL Expert) (Asia)
🏢 Merkleinnovation
📍 Asia