Freelancer profile translated to English.
Back to original languageAbout Helmi
Lead Software Architect with 20 years of experience specializing in digital transformation, I am looking for innovative projects. Versatile, I have a 360 vision of the System Information domain (Strategy, urbanization, Governance, application and infrastructure Architecture, Devops).
I have experience in enterprise architecture, IT governance, and agile program implementation in international environments with multidisciplinary teams. I have practical skills in distributed architecture solutions: API management, Microservices (Spring boot), Events Driven (RabbitMq, azure Event Hub) and integration tools (modern SaaS ETL, No Sql, Cloud solutions), performance, and data modeling (DDD).
I am familiar with major cloud solution providers (AWS, Azure, GCP), container orchestration (Kubernetes), and distributed architecture observability.
English
Fluent
German
Basic
French
Native or bilingual
Can work on-site
Paris (up to 50km)
Experience
- NEXITYArchitect Solution(Cloud)CIVIL ENGINEERINGMay 2024 - Today (2 years and 1 month)Paris, CanadaMember of a project team responsible for transitioning Nexity's information system (IS) applications to Evoriel, via a carve-out approach and migration to the AWS cloud.My main contributions focused on:-Data architecture and integration: Design and implementation ofthe data integration architecture, including the definition of application flowsand migration of SAP BO data•-Use of event buses (Event Driven Architecture) to ensuredata synchronization between different systems•-Business Intelligence and reporting: Contribution to the implementation andoptimization of Business Intelligence solutions, using toolssuch as Microsoft's Power BI and SSIS-Support for cloud migration: Support for the project team for the migration ofinfrastructures and applications to the AWS cloud•This included collaboration in defining target architectures,the use of building blocks to optimize the external exposure ofservices and the pooling of resources, as well as detailed documentationof architectures via diagrams and models.
- OPEN CLASSROOMS & CENTRALE SUPÉLECDatascience ExpertEDUCATION AND E-LEARNINGJanuary 2023 - May 2024 (1 year and 4 months)Paris, Canada1. Analysis of educational system data (World Bank): Cleaning and exploratory analysis of massive data (World Bank) using Python, ANOVA, PCA, NumPy, pandas, seaborn and Matplotlib.2. Public health application (Open Food Facts): Development of a data analysis application for Open Food Facts, using univariate and multivariate statistical analyses (PCA, scikit-learn) to identify correlations between nutritional variables and public health.3. Predictive energy consumption model (Buildings): Creation of a predictive model of energy consumption of buildings based on data analysis, avoiding data leakage and using structural variables. Performance optimization via rigorous hyperparameter evaluation and choice of suitable algorithms (ElasticNet, SVM, GradientBoosting, RandomForest).4. Operational customer segmentation (E-commerce): Development of an operational customer segmentation for an e-commerce platform, analyzing the stability of segments over time.5. Automatic classification engine (Marketplace): Design of an automatic product classification engine based on text and images for an English-speaking marketplace.6. Bankruptcy probability scoring model (Loan to spend): Development of a bankruptcy probability scoring model using analysis of important features. Production deployment of the model via an API with a test interface and implementation of a complete MLOps approach.7. Big Data processing chain (Fruit biodiversity): Implementation of a Big Data processing chain for a mobile application dedicated to fruit biodiversity, including an operational EMR instance, integration of TensorFlow model weight distribution and a PCA dimension reduction step in PySpark.
- SNCF Fret - Rail Logistic EuropeLead Software ArchitectTRANSPORTATIONFebruary 2020 - December 2023 (3 years and 11 months)Saint-Ouen-sur-Seine, FranceProject to migrate and redesign all applications (65) of the existing SNCF Fret perimeter:1. Define the migration strategy, assess the impacts and ensure that they converge towards an SNCF Fret DSI standard. Ensure a review of the application portfolio is the implementation of a mapping. Ensure the consistency and sustainability of architectures/technological solutions within the DSI in collaboration with other network, security and ops teams.2. Review and redesign existing applications as part of the migration. Migration to 3-tier architectures, redesign of the architecture in high availability: Add LB middle, vip front in SFTP, Add Ha proxy in the catalog, migrate the base of the SBB.3. Support the architectural choices of future applications. Provide, for the newBuild, the intermediate and target architectures that take into account the redesign of existing applications. Contribute to innovation to control costs: 300% gain in Gurobi license costs (Data Science and GRPC). Ensure the transfer of skills and the training of new functions to the production and support teams.The redesign and migration phases are completed in May 2022.
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Education
- Engineer of computer scienceUniversity of Tunis El Manar2003
- Master Computer ScienceUniversity of Tunis El Mana2013Develop a microarchitecture MVC2 in aspect-oriented so that the architectural style is isolated in aspects and woven on runtime. This solution has solved the dispersion and the tangle of pattern s code.