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Frank OunaFO

Frank Ouna

Data Engineer / Analyst

€300/day
Köln, DE
15+ years

Average response time: 1 hour

Freelancer profile translated to English.
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About Frank

  • English

    Native or bilingual

  • French

    Basic

  • German

    Fluent

Can work on-site
Köln (up to 50km)

Experience

  • Starke Bäcker
    Business Data Analyst
    June 2024 - Today (2 years and 1 month)
    • ➢ Questioned initial stakeholder requirements to clarify underlying business questions, leading to more relevant KPIs and over 10 hours of rework saved.
    • ➢ Regularly presented analysis findings to management, explaining trends and limitations in non-technical language.
    • ➢ Developed interactive Excel dashboards with pivot tables and slicers to provide stakeholders with clear, actionable insights for data-driven decisions in operations and sales.
    • ➢ Automated data processing and reporting workflows, reducing manual effort and turnaround time for standard reports, and increasing consistency and efficiency.
  • Samba Enterprises Ltd
    Data Analyst
    January 2009 - January 2022 (13 years)
    • ➢ Questioned existing data logic and proposed a new star schema model, reducing query time by 40%.
    • ➢ Extracted and transformed data from various sources (JSON, Excel, operational databases) to ensure high-quality, integrated datasets for accurate reporting and business analysis.
    • ➢ Actively improved existing Power BI dashboards based on user feedback, transforming static reports into interactive decision-making tools.
    • ➢ Applied advanced DAX formulas for time intelligence (year-over-year comparison, growth, moving averages) to provide stakeholders with deeper insights into revenue trends and support performance tracking against business goals.
    • ➢ Developed interactive sales performance dashboards with dynamic filters (branch, product, period), enabling self-service analytics for departments and management.
  • KCB Bank Kenia
    Check Fraud Detection – Data Analysis
    January 2007 - January 2009 (2 years)
    • ➢ Beyond just dashboard creation, I interpreted fraud patterns and presented actionable recommendations to the risk committee, leading to two policy changes.
    • ➢ Developed complex T-SQL scripts for data wrangling: data cleaning (removing duplicates, handling nulls and invalid characters), standardization (date formats, branch codes), and transformation using CASE, PIVOT, MERGE, and CTEs to ensure high-quality, reliable datasets for fraud analysis and reporting.

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Education

  • Bachelor of Science
    Moi Universität
    2002
    Bachelor of Science

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