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Tunde Bello

Data Analyst

Turning messy data into clear decisions with SQL, Python and Power BI

Abuja, Nigeria, Nigeria

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TB

About

Data analyst with 4 years' experience in banking and retail. I build dashboards, automate reporting and run analyses that help managers make faster, evidence-based decisions.

Analyst skilled in SQL, Python, Power BI and Excel, with a track record of saving reporting time and uncovering revenue opportunities.

Mission

Help organisations trust and use their data.

Values

Accuracy, curiosity, clear storytelling

Specialisations

Business intelligence, dashboarding, customer analytics, A/B testing

Experience

  1. Data Analyst

    Access Bank · Abuja

    Apr 2022 – Present

    Own branch-performance and customer-retention reporting; support product teams with ad-hoc analysis.

    Achievements

    Automated 15 weekly Excel reports in Power BI, saving 30 staff-hours a week. Churn analysis informed a campaign that retained ₦1.2bn in deposits.

  2. Junior Data Analyst

    Shoprite Nigeria · Lagos

    Aug 2020 – Mar 2022

    Sales and inventory analysis across 20 stores.

    Achievements

    Basket analysis led to a store layout change that lifted average basket size by 9%.

Projects

  • Customer churn dashboard

    Lead analyst · Jan 2023 – Apr 2023

    Interactive Power BI dashboard tracking churn risk by segment, branch and product.

    Outcomes

    Adopted by 40 branch managers.

    Power BI, SQL, DAX

  • Lagos food-price tracker

    Personal project · Feb 2024 – May 2024

    Python analysis of monthly food prices across Lagos markets with inflation trends.

    Outcomes

    Featured in a local data newsletter.

    Python, pandas, Matplotlib

Skills

Technical

SQLPythonpandasStatisticsData modellingA/B testing

Competencies

Dashboard designData storytellingForecastingData cleaning

Tools & technologies

Power BIExcelTableauPostgreSQLGoogle BigQueryJupyter

Soft skills

Stakeholder managementPresentationAttention to detail

Industries

BankingRetail

Education

  • BSc, Statistics

    Ahmadu Bello University

    Sep 2014 – Jul 2019

Certifications & awards

  • Certification

    Microsoft Certified: Power BI Data Analyst Associate

    Microsoft · Feb 2023 · Valid to Dec 2026

  • Certification

    Google Data Analytics Professional Certificate

    Google · May 2021

Contact

Preferred contact: email