Freelancer profile translated to English.
Back to original languageAbout Salem
Data Engineer with over 3 years of experience in designing scalable data pipelines, cloud migration (AWS), and automating data workflows.
Worked at BNP Paribas, BPCE, and Lamarck Group, where I designed robust data architectures, optimized cloud costs, and developed real-time reporting solutions for critical business uses.
Mastery of Python, SQL, Airflow, and AWS services, with a strong focus on performance, reliability, and industrialization.
I help companies leverage their data through reliable, automated, and scalable platforms.
English
Native or bilingual
French
Native or bilingual
Can work on-site
Paris (up to 50km)
Experience
- BNP Paribas CIB ParisTech Lead Data / Data EngineerBANKING AND INSURANCEMay 2025 - Today (1 year and 1 month)Paris, France- Designed data architectures and scalable ETL pipelines for processing trading data.- Implemented Spark pipelines processing +3M data points, reducing execution times by 70%.- Migrated an N8N workflow to Python pipelines orchestrated with LLM integration for trading email analysis and reconciliation.- Automated business processes (10+ users), reducing manual interventions by 60%.- Implemented advanced data quality rules (discrepancies, duplicates, anomalies) to ensure the reliability of data used by business teams.- Collaborated with international business teams (Paris, Porto, India) to gather requirements, design suitable solutions, and manage developments.- Trained and supported teams in deploying and using applications and pipelines in production environments.Tools: Python, SQL, Apache Spark, Airflow, Linux, Amazon S3, Git, Jenkins, Oracle APEX, N8N.Concepts: Data Architecture, Data Pipeline, ETL, LLM / AI, Cloud, API, System Design.
- Lamarck GroupData Engineer / Cloud EngineerCONSULTING AND AUDITSJanuary 2024 - Today (2 years and 5 months)Paris, France- Successfully migrated on-premises PostgreSQL databases to AWS RDS, improving data availability for dozens of users.- Developed and optimized ETL workflows, accelerating the processing of over 1 million multi-source data points (JSON, CSV, etc.).- Implemented a CI/CD pipeline with AWS CodePipeline and CodeDeploy to automate deployment, reducing deployment time by 30%.- Automated processes with AWS Lambda and EventBridge, orchestrating Python scripts on EC2, reducing manual intervention by 90%.- Reduced and optimized AWS costs by 70% through monitoring via Cost Explorer.- Automated cloud resource management using Terraform, reducing cloud infrastructure management time by 40%.Tools: Python, SQL, PowerBI, AWS (EC2, Lambda, CodeDeploy, CodePipeline, CloudWatch, RDS, S3, EventBridge...), Linux, Docker, Terraform, Github Actions, Flask.Keywords: Cloud Architecture, Data Architecture, Big Data, DataOps, Machine Learning.
- BPCE Paris - IT PrudentielData ConsultantBANKING AND INSURANCEFebruary 2024 - April 2025 (1 year and 2 months)Paris, France- Automated processes to generate complex analyses, reducing data processing time by 50%.- Designed and developed Business Intelligence solutions to improve decision-making through advanced analytics.- Designed and maintained data models capable of handling several billion records.- Developed interactive dashboards, enabling real-time visualization of critical KPIs.Tools: PowerBI, DAX, Power Automate, SQL, Hive, Hadoop, SQL Server, Indexima.Keywords: Big Data, Data Architecture, ETL Tools, Data Warehouse, API, Agile.
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Education
- Certified Associate in Project Management (CAPM)Project Management Institue2025Certified Associate in Project Management (CAPM)
- Core Designer CertificateDataiku2023Core Designer Certificate