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Vanel Siyou FotsoVS

Vanel Siyou Fotso

Senior Data Scientist & Machine Learning Engineer

€600/day
Paris, FR
8-15 years

Average response time: 1 hour

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About Vanel

Are your data an under-exploited asset?
Are your AI projects stuck between PoC and large-scale deployment?

As a PhD in Machine Learning and a freelance Senior Data Scientist & Machine Learning Engineer, I help organizations transform their data challenges into concrete, robust, and industrialized AI solutions.
With over 10 years of experience in major groups (Energy, Media, Consulting, Transport, Public Sector), I work across the entire AI project lifecycle.

✓ GENERATIVE AI (LLM, RAG): Development and deployment of solutions to automate, translate, enrich customer experience, and boost productivity.
✓ ADVANCED MODELING: Design of ML & DL models for prediction, complex time series analysis, graph mining, NLP (classification, anonymization), and Computer Vision.
✓ MLOPS & INDUSTRIALIZATION: Scalable production deployment on Kubernetes, Docker, and CI/CD pipelines (GCP, AWS, Azure DevOps).
✓ BIG DATA: Exploitation of massive volumes with Spark, Apache Beam, BigQuery, and high-performance cloud architectures.

CONCRETE AND MEASURABLE RESULTS:

✓ +96% recall on a recruitment model,
✓ 5x reduction in CVs to process,
✓ 81% accuracy for churn prediction,
✓ €500,000 in AI funding obtained for a major media group.

MY APPROACH: combining scientific expertise, product vision, and industrialization rigor to deliver AI solutions that move from the lab to the field.

As an independent consultant, I bring the flexibility, efficiency, and technical mastery needed to accelerate your digital transformation and achieve your strategic AI ambitions.
  • French

    Native or bilingual

Can work on-site
Paris (up to 50km)

Experience

  • PWC France et Magreb
    Sr. AI Engineer
    CONSULTING AND AUDITS
    March 2024 - December 2024 (9 months)
    Neuilly-sur-Seine, France
    Key Projects:
    Project 1:Development of an AI for categorizing emails related to invoice reminders, thereby automating communication management and sorting.
    Project 2:Creation of an AI to support recruitment, capable of accurately evaluating candidate profiles to simplify and accelerate the selection process.

    Project Team:7 people (1 Data Director, 1 Team Lead, 2 Squad Leads, 4 Sr. AI Engineers)

    Main Responsibilities:
    • Analysis of business needs in collaboration with functional teams (Feature Teams).
    • Scoping and planning of projects in conjunction with stakeholders.
    • Development of AI solutions based on Large Language Models (LLMs).
    • Organization and management of business data collection campaigns to train models.
    • Evaluation of model performance: Recruitment AI: 96% recall for "high_match" profiles, 90% accuracy for "low_match" profiles.
    • Design and development of high-performance APIs with FastAPI.
    • Deployment of solutions on a Kubernetes cluster, ensuring scalability and robustness.
    • Leading weekly meetings with business stakeholders to ensure project tracking and alignment.

    Technical Environment:LangChain, Fast API, Python3, Pytest, MLflow, Sphinx, Kubernetes, Rancher, Azure DevOps, DSPy
    Mathematical Models: GPT4/GPT4o
  • LeMonde
    Tech Lead Data Scientist
    November 2022 - March 2024 (1 year and 4 months)
    Paris, France
    Project:Development of Data Science models, mentoring, and team management
    Project Team:7 people (1 PO/PM, 1 Data Director, 2 Data Scientists, 1 Data Engineer, 2 Developers)

    Main Tasks:

    - Gathering business needs from feature teams and participating in sprints (grooming, backlog).
    - Development of a scalable crawler for data collection from archives of a live website.
    - Implementation of pipelines: data quality monitoring, profiling, traceability, incremental calculation, periodic model training, and scoring.
    - Design and supervision of a Data Science architecture on Google Cloud Platform (GCP) and cost monitoring.
    - Development of predictive models:
    - Early churner detection (Recall: 27%, Precision: 81%).
    - Subscription propensity (Recall: 73%, Precision: 48%).
    - Data analysis (A/B testing) and technical-functional documentation.
    - Updating production infrastructure, writing unit/integration tests (Pytest, doctests), and post-mortems.
    - Writing a proposal for GAFAM funding (€500,000 won).
    - Integration of LLMs (GPT-3.5/4) for use cases: search engine (re-ranking), automated rewriting, translation (fine-tuning).

    Technical Environment:
    Technologies:Python, MLflow, Sphinx, GCP (Vertex AI, Kubeflow, Dataproc, Dataflow, BigQuery, Cloud Functions), Spark, Airflow, Scrapy, Jira, Azure OpenAI, Fastly, Cosmos DB.
    Models: XGBoost, t-SNE, GPT-3.5/4.
    Databases: BigQuery, CloudSQL (MySQL).
  • Enedis
    Machine Learning Engineer
    April 2022 - November 2022 (8 months)
    Courbevoie, France
    Project:Evolutionary maintenance and production deployment of a knowledge extraction application from verbatim feedback
    Project Team:6 people (1 PO, 1 Scrum Master, 3 Machine Learning Engineers, 1 Web Developer)

    Main Tasks:

    Construction of a knowledge graph (PhraseNet) from verbatim feedback.
    Restructuring the application into classes, packaging with Poetry, and code optimization (profiling and reduction of time-consuming functions).
    Deployment of the application on a Kubernetes cluster with containerization via Docker.
    Implementation of a REST API with Flask and documentation via Swagger.
    Writing technical documentation and implementing DataOps practices to automate operational tasks.
    Technical Environment:

    Technologies:Python 3, Flask, Marshmallow, Sphinx, Kubernetes, Docker, JFrog Artifactory.
    Model:Knowledge Graph.

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Education

  • Doctor of Philosophy
    Doctoral School of Engineering Sciences - UCA (Clermont-Ferrand)
    2018
    Ph.D. en Machine Learning

Skill set

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