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William StevenWS

William Steven

Data Scientist | Data Analyst | AI | Python

€550/day
1 project
Paris, FR
3-7 years

Average response time: 1 hour

Freelancer profile translated to English.
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About William

Hello and welcome to my Malt profile đź‘‹

Data Expert with significant entrepreneurial experience, I quickly understand various business challenges. I put myself in your shoes to provide the best solutions.

Here are the missions I regularly undertake:

Data Analyst
- Definition and scoping of business needs
- Analysis of commercial, marketing, and customer performance to propose adequate recommendations
- Analyze, process, and clean data to eliminate errors, missing values, inconsistencies, etc.
- Use of statistical methods to extract the best insights
- Data visualization: Creation of clear charts to represent your data understandably - Python
- Database manipulation - SQL

Data Science
- Implementation of Machine Learning algorithms: sales modeling/prediction, classification, clustering
- Experimentation: implementation and analysis of A/B tests
- Data scraping

Data Engineering
- Data retrieval from various sources (API, SQL database)
- Data transformation to obtain clean data (ETL)
- Data storage in various formats
- Creation and maintenance of data aggregation tables for analysis needs
Automation of recurring tasks to improve the efficiency of the data team

Generative AI / Innovation
- Image generation through Stable Diffusion
- Prompt engineering (ChatGPT or Stable Diffusion)
- R&D - Do you need research on a specific data/AI topic? I will provide you with a detailed report on the possibilities of a technology for your company.

Furthermore, I am fluent in French and English. I integrate well into international teams.

Feel free to contact me for more information. I will be happy to discuss your challenges.
  • French

    Native or bilingual

  • English

    Fluent

Remote only
Primarily works remotely

Experience

  • Pernod-Ricard
    Data Analyst
    AGRICULTURE
    May 2022 - April 2023 (11 months)
    Paris, France
    Python Data Cleaning Data Analysis Data Science Data Quality
  • Datascientest
    Data Scientist
    AUTOMOBILE
    November 2021 - February 2022 (3 months)
    Classification and regression problem to predict CO2 emissions of a car in France.
    - Audit + Data Cleaning
    - Data presentation through Data Visualization
    - Machine Learning + algorithm evaluation
    - Use of GIT + GITHUB for code versioning
    - Creation of a Streamlit app to present results
    Machine learning Data Visualization Data Cleaning Data Analysis Data Science Streamlit
  • Polycarbone
    Data Analyst / Business Analyst
    ENVIRONMENTAL
    May 2020 - January 2022 (1 year and 8 months)
    Montréal, Canada
    Data Analysis - Python
    Development and deployment of new business models
    Website development - WordPress
    Business Development Business Model Entrepreneurship Wordpress Data Analysis Data Analyst Python

Reviews

5.0

Out of 1 rating

AurélienA

Aurélien

Rooster Metrics

Reviewed on 4/11/2022

William proved to be a valuable asset at a time when we needed it. His dynamism and seriousness allowed him to be a source of proposals going beyond our expectations. The exchanges are efficient and transparent, and professionalism is very present. We recommend his services without hesitation!

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Education

  • Data Science
    MINES Paris Tech / DataScientest
    2021
    Programme intensif d'apprentissage de la Data Science
  • Master - Bachelor of Business Administration
    HEC Montréal
    2015
    Spécialité entrepreneuriat

Certifications

  • ISSP-SA
    International Society of Sustainability Professionals
    2020
    Sustainable Development Sustainability Environment

Skill set

Categories