Freelancer profile translated to English.
Back to original languageAbout Ali
Data Architect with over 25 years of experience, specializing in the secure transformation of critical data systems.
I support organizations (public sector, finance, industry) on high-stakes programs, including:
- decommissioning of legacy systems (mainframe, Oracle, SQL Server)
- migration to modern architectures (Lakehouse, streaming, cloud)
- implementation of real-time pipelines (CDC, Kafka, Spark)
- structuring of robust, governed, and scalable data platforms
My approach is based on three pillars:
- mastery of data dependencies (mapping, lineage, flows)
- industrialization of migrations (frameworks, automation, patterns)
- securing trajectories (coexistence, rollback, service continuity)
I work across the entire value chain:
- strategic scoping and trajectory definition
- target architecture design
- implementation and industrialization
- technical steering and multi-stakeholder coordination
Examples of achievements:
- design of CDC pipelines synchronizing up to 300 databases
- development of SQL → Spark migration frameworks
- definition of decommissioning strategies in sensitive environments
- migration to Lakehouse architectures (Iceberg / Trino)
Main technologies:
Spark, Kafka, SQL, PostgreSQL, Iceberg, Trino, Debezium, ClickHouse, AWS, Azure
I position myself for complex data transformation missions requiring a high level of expertise and security.
Available for migration, modernization, or decommissioning missions of critical data systems.
Spanish
Native or bilingual
English
Conversational
French
Native or bilingual
Can work on-site
Paris 11e Arrondissement (up to 50km)
Experience
- GEODISData ArchitectLOGISTICS AND SUPPLY CHAINJanuary 2025 - January 2026 (1 year)Migration of a SQL Server environment to a Lakehouse architecture (Iceberg / Trino).Development of an industrial migration framework covering structure, data, and logic.Automated transpilation of SQL Server procedures to Spark SQL to accelerate transformation.Target modeling in medallion architecture and definition of the decommissioning strategy.→ Result: industrialization of migration and reduction of rewrite efforts.
- Ministère de l'Intérieur – ANEFData ArchitectPUBLIC SECTORJanuary 2025 - Today (1 year and 5 months)Decommissioning of a critical mainframe system in a sensitive regulatory environment.Mapping of business flows and data dependencies to identify impacts and secure the exit trajectory.Definition of source/target scopes and structuring of transformation steps.Design of a steering tool to track decommissioning progress.→ Result: reduction of operational risk and control of critical dependencies.
- Renault / StellantisData ArchitectAUTOMOBILEJanuary 2024 - January 2025 (1 year)Implementation of a scalable data architecture with real-time synchronization.Deployment of a CDC architecture (Debezium / Kafka) to synchronize MySQL data to PostgreSQL.Setup of a PostgreSQL cluster (master + replicas) and a load balancing mechanism (PgPool).Structuring of a Data Warehouse in Bronze / Silver / Gold architecture.→ Result: improvement of performance and reliability of real-time flows.
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Education
- DESS in Computer Science and Life Sciences (double degree)Université René Descartes Paris V1992Ce DESS exclusivement réservé au diplômé de l'école de Médecine de Paris était essentiellement orienté vers l'enseignement des réseaux de neurones et les moteurs d'inférence. J'ai présenté mon mémoire sur le sujet des Algorithmes Génétiques qui sont l'un fondements de l'Intelligence Artificielle.
- Certificate of Clinical and Therapeutic Synthesis (Medical Degree)Université René Descartes Paris V1992
Certifications
- Retengr DataScientistRetengr2019