Rahees Tahir

Data Analyst & Full-Stack Developer | Power BI + AI Integration

I build data-driven tools and intelligent systems—from education analytics to business intelligence dashboards.

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AI & Technical Projects

Innovative solutions combining artificial intelligence with practical applications

AI MathBot Interface Screenshot

AI MathBot

Your intelligent math assistant powered by OpenAI, capable of solving complex problems with step-by-step explanations.

Python Flask HTML Javascript CSS Swift Kotlin MySQL
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AI MathBot Pro Preview

AI MathBot Pro

Advanced version with premium features including GPT4 , PDF processing, custom tutoring, and API access.

Python Swift OpenAI API GPT-4 OCR
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Instructor Portal Interface Screenshot

Instructors Portal

Comprehensive instructor platform to manage clients, schedule appointments, track progress and analyse earnings with financial insights.

SwiftUI StoreKit CloudKit MapKit Charts Kotlin Core Data
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Data Analytics & EdTech Development

Where technical precision meets educational outcomes

Power BI Developer | SQL Analyst | Azure Data

National Education Analytics Initiative

15% faster decisions | 40% faster report loads

Delivered Through

  • Power BI Optimization: Reduced report load times by streamlining DAX and simplifying data models.
  • SQL Development: Designed complex joins and CTEs processing 5M+ records with sub-second response times
  • ETL Pipeline Testing: Validated transformation logic for 50+ business rules in critical data pipelines
Power BI DAX SQL CTEs Azure

Professional Experience

Key roles delivering data-driven solutions

NCETM Analytics

Data Analyst - Education Services

Led analysis for DFE initiatives including NCETM, delivering stakeholder-ready dashboards and strategic reporting.

Power BI DAX Azure
Exasol Dashboard

Power BI Developer - Exasol

Created dynamic, real-time dashboards that integrated Exasol with Power BI, improving reporting efficiency.

Power BI SQL ETL
VYB Analytics

Data Analyst - VYB Dalston

Increased customer satisfaction by 15% through targeted menu optimizations using advanced statistical analysis.

SQL Excel Power BI

Client Work

Professional projects delivered for clients across industries

Redbridge Driving School Preview

Redbridge Driving School

Modern website with integrated booking system for a UK-based driving school, increasing customer conversions by 40%.

Wix Studio Booking System SEO Optimised
AI CV Tailoring Interface

ATS-Compliant CV Studio

Desktop tool that reverse-engineers job descriptions, optimizes CVs for ATS algorithms using GPT-4, and generates interview-ready PDFs with one click.

Python GPT-4 ATS Algorithmics
AI Lesson Generator Pilot Preview

AI Maths Lesson Generator

AI-powered lesson generator creating Ofsted-aligned resources with retrieval practice, metacognitive prompts, and dynamic plenaries – powered by GPT-4 integration.

OpenAI API GPT 4 Pedagogy Design

Professional Endorsements

Verified feedback from colleagues and clients

"CoreStackAI delivered an exceptional website and booking system that streamlined our driving school operations. Their modern website design significantly improved customer conversions. The team was professional, responsive and delivered exactly what we needed."

Ali Mansoor Redbridge Driving School Client Project • 2025

"Rahees is the full package as a data professional. He excels at translating stakeholder needs into actionable insights, owns projects end-to-end, and delivers with technical rigor in Power BI, SQL, and Excel. What sets him apart is his ability to rapidly master new technologies—including AI tools—while maintaining clear communication."

David Marcisak, MBA, CSM Skilled professional bridging business and tech View on LinkedIn

"Rahees is one of the most insightful data analysts I've collaborated with. He masters complex datasets and competing priorities, delivering strategic insights through PowerBI dashboards and ad-hoc analyses. What sets him apart is his problem-solving mindset, SQL/Python expertise, and ability to explain technical concepts with clarity and positivity."

Elaine Stables Product, Data & Operations Specialist View on LinkedIn

About Me

I'm a data and AI specialist with full-stack project experience, focused on creating practical solutions at the intersection of analytics and intelligent systems. My strength lies in transforming complex data into actionable insights through technical implementation.

While I've built complete applications end-to-end, my core expertise centers on data systems, AI integration, and business intelligence. I combine analytical rigor with technical execution to deliver solutions that drive measurable impact.

Data Analyst | Power BI Specialist

Enhanced national education dashboards processing 2M+ records through:

  • ▹ DAX Optimisation: Enhanced core measures and filter contexts to improve dashboard responsiveness
  • ▹ Power BI Data Integrity: Audited and corrected key metrics across reports, eliminating discrepancies in critical decision-making data
  • ▹ Power BI Optimization: Used Performance Analyser to identify and refactor inefficient DAX measures, improving dashboard load times by 40% through optimized filter contexts and star schema relationships
  • ▹ Dashboard Evolution: Iteratively refined DIT reports based on educator feedback cycles
  • ▹ ETL Transition: Resolved pipeline failures during critical on-premises to Azure cloud migration
  • ▹ SQL Optimisation: Improved stored procedures using temp tables and CTEs to reduce dataset refresh times while improving accuracy
  • ▹ User Enablement: Produced training guides and documentation that reduced recurring support requests by 25%
2022-Present

Mathematics Teacher | Associate Head of Year

Designed data-driven tracking systems that reduced behavioral incidents by 25%

2016-2022

Technical Skills

Power BI DAX Power Query SQL Azure SSMS Python Swift Kotlin Flask OpenAPI HTML/CSS

Certified Expertise

IBM SQL for Data Science
Analyzing Data with Power BI
Analysing Data Bootcamp
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Get In Touch

Have a project in mind or want to collaborate? I'd love to hear from you.

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