Taofeek Salami — Data Analyst Portfolio

What I Do

How I Can Help

01 · Revenue

Sales & Revenue Analysis

Turn sales data into a clearer understanding of where revenue is growing, where profitability is being lost, and where opportunities may exist.

Revenue trends
Loss-making products
Profitability problems
Revenue leakage

02 · Customers

Customer & Retention Analytics

Analyze customer behavior to identify churn risk, retention patterns, valuable segments, and revenue that may be at risk.

Churn analysis
Customer retention
Customer segmentation
Revenue at risk

03 · Product

Product & Growth Analytics

Analyze product usage and experiment data to identify what drives engagement, adoption, and growth — validated through statistical testing rather than assumption.

Feature adoption
A/B testing
Funnel & conversion analysis
Product engagement

04 · Reporting

Data Analysis & Reporting

Move from raw data to structured analysis, reporting, and visualisation that makes business performance easier to understand.

SQL analysis
Excel reports
Tableau dashboards
Python data pipelines

Portfolio

Featured Case Studies

A selection of projects demonstrating how I apply data analytics to solve Credit Risk, Product, and CRM challenges across Fintech, SaaS/Telecom, and E-commerce.

Fintech
Credit Risk
Analysis

SQL MySQL Python Tableau Complete

Fintech Credit Risk Analysis

Bureau-independent credit risk segmentation across 149,999 borrowers — combining SQL, Python behavioral risk scoring, and a custom Exposure Index. Found that borrowers scoring Critical on both behavioral risk and exposure default at 55.0%, and that a placeholder data-quality flag outperformed every engineered feature at 54.65%.

Telco
Customer Churn
Analysis

SQL MySQL Excel Complete

Telco Customer Churn Analysis

End-to-end churn analytics project across a three-pillar framework — Customer, Revenue, Risk — built on 22 SQL queries and a four-dashboard Excel reporting suite. Found that month-to-month, early-tenure fiber optic customers drive 30.50% of revenue at risk, and isolated an 814-customer high-risk segment churning at 69.53%.

Customer
Retention &
Revenue Analysis

Customer Retention & Revenue Stability Analysis

Analyses customer retention dynamics, revenue stability, and geographic concentration risk for a UK e-commerce retailer. Built across a 10-phase Excel workflow covering data cleaning, KPI design, retention calculation, segment risk analysis and executive dashboard.

Portfolio

Additional Projects

Supporting work that broadens the SQL, Python, and Excel foundation behind the featured projects above.

Superstore
Sales Database
Exploration II

SQL MySQL Python Complete

Superstore Sales Database — Exploration II

End-to-end pipeline on a Canadian retail dataset (2009–2012, 8,399 orders). Designed a normalised MySQL schema, built a Python/SQLAlchemy ETL pipeline from Excel, then answered 10 self-generated business questions with Pandas and Matplotlib. Uncovered that 50.4% of orders were loss-making despite $14.9M in total revenue, while Furniture generated $5.18M in sales but only a 2.3% margin.

Quantium
Chip Category &
Trial Store Uplift

Quantium Data Analytics — Forage Job Simulation

Cleaned and merged 264,836 transactions with 72,637 loyalty customer records to analyse chip category purchasing behaviour, then built a correlation-based control store matching model to test trial layout uplift. Store 77 delivered the strongest result at +33.5% sales uplift, backing a client-facing recommendation for Quantium's Category Manager.

Logistics
Operations
Performance Analysis

Python Tableau Complete

Logistics Operations Performance Analysis

Analyzed 85,000+ trip records across 14 tables to evaluate fleet, route, driver, and maintenance performance. Found a 55.7% on-time rate, $5.7M in maintenance spend, and a severely loss-making route requiring investigation. Delivered the analysis through a Tableau dashboard.

Employee
Performance &
Sales Analysis

SQL MySQL JOINs Complete

Employee Performance & Sales Analysis

Evaluates operational workload imbalance, employee-driven retention risk, and supplier geographic concentration. Detected a 6.7× workload gap and 82% of co-located supplier pairs concentrated in the US and Europe.

Northwind
Customer &
Product Analysis

Customer & Product Performance Analysis

Evaluates customer concentration risk, pricing imbalance, and revenue dependency within a wholesale distribution environment. Identified 17 inactive accounts representing untapped revenue and pricing outliers skewing the catalog average.

Job Simulations

Forage Virtual Experience Programs

Quantium

Data Analytics — Job Simulation

Jun 2026

BCG

Data for Decision Makers — Job Simulation

May 2026

Deloitte Australia

Data Analytics — Job Simulation

Jun 2026

Professional Training

TS Academy — Data Analytics

Completed 3-Month Programme · Certificate Issued Jul 2026

Data Analytics Certification Programme

Completed a structured 3-month Data Analytics training programme covering the full analytics workflow. The Logistics Operations Performance Analysis was developed and submitted as the programme's capstone project, with the programme certificate issued in July 2026.

View Capstone Project →

Professional Certification