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soheiltaheri/README.md

Hi, I'm Soheil 👋

Data Analyst with 2+ years of experience working with business, market, customer, and digital-performance data.

I use Python, SQL, Excel, and BI tools to turn raw data into structured analysis, KPIs, dashboards, and actionable business insights. I'm also exploring practical AI/LLM applications in analytics, with a focus on reliable calculations, grounded outputs, and real business use cases.

What I Work With

Data Analysis: Python, pandas, SQL, Excel, Google Sheets Analytics: KPI Design, Customer Segmentation, Cohort Analysis, Campaign Analysis, Market & Competitor Analysis Visualization: Looker Studio, Power BI, Excel Dashboards Data Collection & Automation: REST APIs, Web Scraping, n8n Applied AI: LangChain, LangGraph, Langfuse, Structured LLM Outputs & Guardrails

Featured Projects

AI-Powered Business Performance Analyst

An end-to-end analytics application that calculates business KPIs deterministically, compares performance periods, detects meaningful changes, and uses an LLM to generate grounded management summaries.

Python pandas FastAPI LangChain LangGraph Langfuse Streamlit

Customer Analytics — RFM & Cohort Retention

A customer analytics case study combining RFM segmentation, cohort retention analysis, revenue concentration, and business-focused recommendations.

Python pandas RFM Cohort Analysis Customer Analytics

Excel Bike Purchase Analytics

An interactive Excel analytics project using data cleaning, formulas, PivotTables, slicers, purchase-rate analysis, and dashboard visualization.

Excel PivotTables Slicers Dashboarding Customer Analysis

Nashville Housing SQL Cleanup

A MySQL data-cleaning and validation case study covering data-quality checks, address standardization, deterministic deduplication, window functions, validation, and post-cleaning analysis.

SQL MySQL CTEs Window Functions Data Cleaning Data Validation

Currently

  • Working as a Data Analyst across digital analytics, market analysis, and AI-enabled product initiatives
  • Pursuing an M.Sc. in Management Information Systems
  • Strengthening my analytical problem-solving, statistics, and applied AI skills

Connect

LinkedIn

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  1. LLM-Business-Performance-Analyst LLM-Business-Performance-Analyst Public

    AI-powered business performance analysis with FastAPI, LangGraph, LangChain, Langfuse, and Streamlit.

    Python

  2. Customer-Analytics-RFM-Cohorts Customer-Analytics-RFM-Cohorts Public

    Customer analytics case study focused on RFM segmentation, cohort retention, revenue concentration, and actionable business insights using Python and pandas.

    Jupyter Notebook

  3. Excel-Bike-Purchase-Analytics Excel-Bike-Purchase-Analytics Public

    Excel customer analysis dashboard with data cleaning, pivot tables, slicers, purchase-rate analysis, and interactive business insights.

  4. Football-Win-Prediction-Analytics Football-Win-Prediction-Analytics Public

    Leakage-aware football predictive analytics project with web-scraped data, temporal validation, model evaluation, and a Streamlit historical prediction explorer.

    Jupyter Notebook

  5. Nashville-Housing-SQL-Cleanup Nashville-Housing-SQL-Cleanup Public

    MySQL data cleaning and validation case study with CTEs, window functions, deduplication, data-quality checks, and business-oriented analysis.