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Mizuki KakeiMK

Mizuki Kakei

Data Analyst with background in Physics

€694/day
Karlsruhe, DE
3-7 years

Average response time: 1 hour

About Mizuki

5 years of experience as a Product Data Analyst, combined with a background in Physics and over 12 years of international experience. I bring strong mathematical and analytical skills, and I’m passionate about coding and uncovering meaningful insights from data.

I studied physics at the University of Leipzig for my bachelor's degree. While studying there, analyzing data fascinated me especially, leading me to develop my skills further. I gained practical experience working with actual data and business cases, using R and SQL databases through a traineeship at Ubiqum Code Academy.

After completing the traineeship, I joined Delivery Hero. Over the four years at Delivery Hero, I have supported various teams within the company as a product analyst globally for more than 48 countries. I then transitioned to Overleaf, where I worked with the core function team to enhance product performance.


In both roles, my work typically focused on five key areas:
1, Data Tracking: Designing tracking concepts and implementing them using Google Tag Manager.
2, Data Visualization: Building dashboards using Google Data Studio and SQL, with automated data pipelines utilizing Git, dbt, and Airflow.
3, Exploratory Analysis & Reporting: Conducting data extraction and analysis using SQL and presenting insights via Google Slides.
4, Stakeholder Collaboration: Working closely with cross-functional teams to align on business goals and data needs.
5, A/B Testing: Designing and executing A/B tests, including sample size estimation, strategy development, and results analysis using SQL, Python scripts, and A/B testing tools.


  • Japanese

    Native or bilingual

  • English

    Fluent

  • German

    Basic

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

Experience

  • Overleaf
    Senior Data Analyst
    October 2024 - March 2025 (5 months)
    Responsibilities
    • Product Enhancement & Strategy Discussion: Led product enhancements for Overleaf and Writefull and collaborated closely with core function teams to support strategic discussion from an analytics perspective.
    • Tracking Design: Designed a structured tracking system for both existing and new features for comprehensive data collection and enabling practical analysis.
    • Analysis: Conducted in-depth data analysis using SQL and large datasets. Created storytelling presentations with Google Slides to provide insight into user behavior for various stakeholders. Developed dashboards in Google Looker Studio and Google Sheets to report and visualize key trends and metrics.
    • A/B Testing & Insight Analysis: Designed and executed A/B tests, and provided actionable insights. Delivered presentations to inform decision-making and future product development.
    SQL A/B test Big Data Data analysis google data studio
  • Delivery Hero
    Product Analyst
    DIGITAL AND IT
    November 2019 - February 2024 (4 years and 3 months)
    Berlin, Germany
    Responsibilities
    • Product Enhancement : Led product enhancement for iOS, Android, and Web platforms. Supported search, post-order, retention, and donation feature on a global scale across 48+ countries.
    • Data Tracking : Managed user activity tracking through Google Tag Manager, Google Analytics.
    • Analysis : Conducted discovery and performance analyses using SQL. Presented findings and recommendations using google slides.
    • Stakeholder management : Collaborated cross-functionally with product managers, specialists, designers, engineers, scientists. Played key role in navigating product strategy decisions and feature implementations.
    • Dashboard : Created dashboards using Google Data Studio. Automated data sources using git, Airflow and DBT
    • A/B testing : Executed over 30 AB tests, including sample size estimation, KPIs decision, AB test monitoring dashboard creation. Utilized Python scripts and SQL for results analysis and investigated statistical significance.
    A/B test Data visualization Data analysis Google Analytics SQL
  • Ubiqum Code Academy
    Data analyst Trainee
    DIGITAL AND IT
    April 2019 - October 2019 (6 months)
    Berlin, Germany
    • 800 + hours onsite full-time coding training
    • Data analytics and machine learning using R and SQL
    • Agile Methodology
    • Time Series Project IoT with energy consumption data
    • Supervised Machine Learning for sales volume prediction, brand preference prediction and a Wifi indoor positioning application project (Classification & Regression )
    • Basket analysis project
    • Big Data Analytics and Cloud Computing with AWS
    • 1st prize in a logical thinking competition in the organisation

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Education

  • Bachelor of Science
    University of Leipzig
    2018
    Bachelor of Science in Physics,
  • English Language Program,
    University of Western Australia
    2014
    English Language Program,

Skill set

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