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Oussama J.OJ

Oussama J.

Full Stack / DATA / IoT / DevOps Developer

€600/day
Paris, FR
8-15 years

Average response time: 1 hour

Freelancer profile translated to English.
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About Oussama

Passionate about the convergence of connected objects and data valorization, I support the digital transformation of smart territories and industries. My background, from hardware design to the deployment of Data platforms, has allowed me to build an end-to-end vision and manage high-value-added projects.
  • French

    Native or bilingual

  • English

    Fluent

Can work on-site
Paris (up to 50km), Lyon (up to 10km), Nice (up to 30km)

Experience

  • CONFIDENTIEL
    Full Stack & Data AI Developer
    SOFTWARE PUBLISHING
    September 2025 - Today (9 months)
    ▪ Design and implementation of a multi-tenant Data Analytics platform enabling operators and communities to visualize and analyze data from connected meters (water and electricity).
    ▪ Definition and implementation of the data architecture from scratch, including the setup of aData Warehouseand the integration ofApache Supersetfor reporting analytical indicators and dashboards.
    ▪ Development of amulti-tenantanalytical web portal, integrating identity and access management via Keycloak and an RBAC system to control access todashboardsand data based on user profiles.
    ▪ Development of distributed data processing pipelines with PySpark, enabling the preparation, transformation, and enrichment of large volumes of data before analytical exploitation or use by AI models.
    ▪ Integration of generative AI technologies through the implementation ofRAGknowledge bases (OCR analysis, vectorization with Pgvector).
    ▪ Design of processing chains withLangChain/LangGraphand monitoring of model quality/performance viaLangFuseand RAGAS.
    ▪ Design and development of the main frontend inAngular &**React**, based on a modular architecture with lazy loading, dynamic tenant configuration, and multilingual support (3 languages).
    ▪ Development of backend APIs inPython(**FastAPI**) for access management, coupled withCelery/Redisfor asynchronous task orchestration and dashboard integration.
    ▪ Industrialization and deployment of the platform, includingDockercontainerization,Kubernetesdeployment via Helm, creation of environment initialization jobs, and Superset customization for integration into the application ecosystem.
    Kubernetes Python DevOps Keycloak Apache Superset
  • VINCI – CITEOS
    Fullstack & Lead Data Analytics Engineer
    May 2024 - Today (2 years and 1 month)
    Paris, France
    • Writing the technical architecture for a strategic project.
    • Design and development of a Data Analytics oriented product: Conducting in-depth studies for the design of a data-driven solution, enabling comprehensive data analysis for strategic decision-making.
    • Implementation of a modern data platform: Integration of cutting-edge technologies to design a scalable and secure data infrastructure, facilitating the management, processing, and analysis of large volumes of data.
    • Implementation of ClickHouse for managing massive data.
    • Orchestration of data transformations with Airflow and DBT, workflow automation.
    • Configuration and administration of Superset: as well as the creation of dashboards for data visualization.
    • Creation of custom plugins for Superset.
    • Migration of the Vue.js 2 frontend to Vue.js 3, with performance optimization.
    • DevOps migration to GitOps, deployment automation via Git pipelines.
    • Implementation of CI/CD pipelines.
    • Frontend: Dynamic loading of configurations for multi-tenant SaaS.
    • Setup and configuration of Keycloak.
    • Development of push/pull APIs for flexible data management.
    • Connectors and data ingestion processes with Apache NiFi
    DevOps Data Engineer Full-stack Development AI Agent Airflow
  • FREELANCE
    Data & IoT Engineer
    INTERNET OF THINGS (IOT)
    January 2023 - January 2024 (1 year)
    ▪ Gathering specific needs from the client regarding expected visualizations and functionalities.
    ▪ Gathering specific needs in IoT data visualization.
    ▪ Study of ThingsBoard APIs to retrieve data from connected devices (telemetry, events, alarms).
    ▪ Modification of the user interface for better ergonomics and alignment with IoT needs.
    ▪ Addition of specific features such as filters adapted to IoT data (real-time, devices, locations).
    ▪ Development of custom visualizations (interactive geographical maps, timelines, heatmaps).
    ▪ Design of specific graphs to represent real-time telemetry, anomalies, or historical trends.
    ▪ Implementation of connectors to retrieve IoT data from ThingsBoard via its REST and MQTT APIs.
    ▪ Synchronization of data between ThingsBoard and Superset to enable enriched analysis.
    ▪ Development of automation scripts to extract device metadata and integrate it into Superset.
    ▪ Optimization of SQL queries generated by Superset for the databases used.
    Python Internet of Things

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Education

  • Embedded Systems Engineer
    ESIEE Paris
    2021

Skill set

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