Hello, I'm

Jonathan Musni

Data Engineer | Analytics Engineer

I build production data pipelines, the analytics models on top of them, and the data quality and lineage controls that keep both trustworthy. Currently at Chalhoub Group in Dubai, working on retail data products with Airflow, dbt, BigQuery and Looker.

63% Cost Reduction
96% Performance Boost
5+ Years Experience
View My Work Get In Touch Download Resume
Jonathan Musni running marathon in New York
Marathon Finisher

About Me

From healthcare tech to data engineering excellence

My Journey

My path to data engineering began in an unexpected place - the operating rooms of St. Luke's Medical Center in the Philippines. As a Biomedical Equipment Technician, I learned the critical importance of precision and reliability when technology directly impacts lives.

This foundation led me through operations support at Sky Cable Corporation, where I optimized network performance while self-studying data science. DXC Technology sponsored my Master's in Data Science at Drexel University, opening doors to the fascinating world of AI and machine learning.

After four years in Philadelphia with DXC Technology and Comcast, I moved to Dubai in late 2025 to join Chalhoub Group as a Data Engineer. Today I build the pipelines, semantic layers and data quality controls behind the reporting a large retail organization runs on, with the same precision and attention to detail that started my journey in healthcare technology.

Education

MS Data Science (Drexel, 3.92 GPA)
Graduate study, MS Information Systems (Harrisburg, 2024-2025)

Location

Dubai, UAE
Previously Philadelphia, PA. Originally from the Philippines

Beyond Code

Spartan racer & marathoner
Building AI tools for training

Professional Journey

Building data solutions that drive impact

Data Engineer

Chalhoub Group, Dubai, UAE Nov 2025 - Present

Owning CRM, supply chain and retail governance data products for a luxury retail group:

  • Build and maintain end-to-end pipelines feeding CRM, supply chain and logistics dashboards used by hundreds of business users across 20+ brands
  • Led the migration of 12 reports from Oracle BI Publisher to Looker using dbt, Airbyte and BigQuery, rebuilding business logic into a governed LookML semantic layer
  • Built governance analytics reconciling Oracle EBS and RMS, surfacing a ~5% cost-of-goods-sold variance and replacing manual investigation with a monitored dashboard
  • Define assertions and map column-level lineage in DataHub so upstream breakages surface before they reach reporting
BigQuery dbt Airflow Airbyte Looker / LookML DataHub

Graduate Study & Independent Data Engineering

Harrisburg University of Science and Technology Mar 2024 - Sep 2025

Graduate coursework in Information Systems & Engineering Management (24 credits) alongside self-directed projects:

  • RealtyLens: daily ELT platform over 700K+ property listings with Airflow on Astronomer, S3 to Snowflake, a dbt star schema, data-quality tests and a gradient-boosting rent model
  • Retail RFM Analytics: medallion-architecture pipeline on Databricks with RFM scoring and K-means customer segmentation
  • DataExpert Combined Track (Data and Analytics Engineering), Superb certificate (2025)
  • Open-source work on Apache Iceberg, Model Context Protocol with AWS Glue, and agentic AI applications
Snowflake dbt Airflow Databricks LangGraph MCP

Data Engineer

Comcast 2023 - 2024

Contracted data engineering services for major telecommunications company:

  • Built scalable data pipelines for analytics platforms
  • Enhanced data observability and monitoring systems
  • Implemented modern data engineering best practices
  • Earned multiple certifications including AWS Data Engineer Associate
Apache Spark AWS Databricks Data Pipelines

Data Engineer

DXC Technology Platform X 2021 - 2023

Transitioned to full-time data engineering with exceptional results:

  • 96% latency improvement (2 minutes to 2 seconds) through dataset migration
  • 63% AWS S3 storage cost reduction while maintaining data integrity
  • Made Platform X Data Lake GDPR compliant
  • Graduated with MS Data Science from Drexel University (2021)
Apache Spark AWS S3 Data Lakes GDPR Compliance Python

Data Scientist

DXC Technology AI Studio 2019 - 2021

Pioneered ML and AI applications while pursuing Master's degree:

  • Built Machine Learning powered racing simulator
  • Developed backend for AI-powered Virtual Reality application
  • Pursued MS in Data Science at Drexel University (sponsored by DXC)
  • Moved to Philadelphia, USA in 2019
Machine Learning Python VR/AR Data Science

Electronics Engineer - Area Operations

Sky Cable Operations 2016 - 2019

Provided technical operations support for telecommunications infrastructure:

  • Managed area operations for cable television and internet services
  • Optimized network performance and system reliability
  • Self-studied data science and Python during free time
  • Brief training as Civil Aviation Authority officer candidate (2016)
Network Operations Electronics Engineering System Optimization Self-study

Biomedical Equipment Technician

St. Luke's Medical Center 2015 - 2016

Critical healthcare technology support in operating room theaters:

  • Ensured reliability of medical equipment during surgeries
  • Maintained precision and attention to detail in life-critical environments
  • Passed Philippines Electronics Engineering Licensure Exam (2015)
  • Graduated BS Electronics Engineering from Polytechnic University (2014)
Medical Equipment Quality Control Electronics Engineering Critical Systems

Featured Projects

Real-world solutions with measurable impact

GridCoach demo: AI training coach inside a Google Sheet
FastAPI OpenAI Responses API Google Apps Script Strava API SQLite Pandas

GridCoach - AI Training Coach in a Google Sheet

An agentic training coach that lives inside the athlete's own spreadsheet. Strava history, weather and a rolling health snapshot sync into tabs deterministically; an OpenAI-powered coach in the sidebar reads them, answers questions with tool calls, runs sandboxed pandas analysis, and writes training plans and charts back into fixed columns. Destructive actions require confirmation, and every fact is re-queried rather than guessed.

24 Agent Tools
Webhook Live Strava Sync
View Project GitHub Watch Demo
RealtyLens Project Screenshot
Airflow Snowflake DBT Streamlit AWS S3 Machine Learning

RealtyLens - Real Estate Analytics Platform

Comprehensive real estate analytics platform featuring daily ELT pipeline with Astronomer Airflow, machine learning rent price predictions, and market lifecycle tracking. Data warehouse powered by S3 and Snowflake with spatial joins for zoning analysis.

700K+ Property Records
Daily Market Tracking
View Project GitHub
Retail Customer Analytics Pipeline Screenshot
Databricks Delta Live Tables K-means Clustering GitHub Actions Delta Lake

Retail Customer Analytics Pipeline

End-to-end data engineering pipeline with medallion architecture (Bronze/Silver/Gold layers). Features automated K-means customer segmentation, RFM analysis, and comprehensive data quality monitoring.

View Project GitHub
Multi-Agent Job Application Helper Screenshot
CrewAI GPT-4 Multi-Agent Systems LangChain

Multi-Agent Job Application Helper

AI system using CrewAI multi-agent framework to ethically optimize job applications. Features coordinated agents for resume analysis, job matching, and application enhancement while maintaining authenticity.

Read Article View Project GitHub
Stateful Conversational AI Chatbot Screenshot
LangGraph PostgreSQL ChromaDB OpenAI

Stateful Conversational AI Chatbot

Advanced chatbot with hierarchical context retrieval using LangGraph. Features 3-tier memory architecture: last 5 conversations (PostgreSQL), vector search (ChromaDB), and LLM knowledge base.

View Project GitHub
Model Context Protocol Implementation Screenshot
FastMCP AWS Glue Apache Iceberg Model Context Protocol

Model Context Protocol Implementation

MCP client and server implementations featuring specialized Iceberg server for AWS Glue integration. Supports database management, schema inspection, data querying, and snapshot history tracking.

View Project GitHub
Apache Iceberg Handbook Screenshot
Docker Apache Spark MinIO GDPR Compliance

Apache Iceberg Handbook

Comprehensive technical collection covering Copy-on-Write vs Merge-on-Read strategies, GDPR compliance implementation, and interactive Jupyter notebooks with complete Docker environment setup.

Read Blogs

Technical Expertise

Modern data stack and cloud technologies

Cloud Platforms

AWS
GCP
Azure
Databricks

Programming Languages

Python
SQL
PySpark

Data Processing

Apache Spark
Airbyte
Docker

Tools & Frameworks

Airflow
dbt
Looker / LookML
DataHub

Data Warehouse

BigQuery
Snowflake
PostgreSQL
Redshift

Data Lakehouse

Delta Lake
Apache Iceberg
S3 Tables

AI Engineering

Model Context Protocol
RAG Systems
Vector Databases
Agentic AI

Professional Certifications & Education

AWS Certified

Data Engineer Associate (2024)

Databricks Certified

Data Engineer Professional (2024)

Databricks Certified

Generative AI Engineer Associate (2024)

Azure Certified

AI Engineer Associate (2024)

DataExpert

Combined Track Superb (2025)

DeepLearning.AI

Generative AI with LLMs (2024)

Education: MS Data Science (Drexel University, 2021) • MS Information Systems & Engineering Management coursework (Harrisburg University, 2024-2025, 24 credits) • BS Electronics Engineering (Polytechnic University of the Philippines, 2014)

Running Journey

I started running during the pandemic and it has helped me mentally through some tough times. I love joining races and running with friends, but most of the time, running alone is where I get clarity on some things that I am working on, whether in my personal or professional life.

Spartan Stadion 5K

2021 Washington DC

First Spartan race - stadium obstacles and endurance challenge

Spartan Beast 21K

2023 Cincinnati, Ohio

Ultra-distance obstacle race with 30+ obstacles over challenging terrain

Philadelphia Marathon

2023 Philadelphia, PA

26.2 miles through the City of Brotherly Love - home marathon achievement

Delaware Marathon

2024 Wilmington, Delaware

Second marathon completion - building endurance and consistency

Spartan Super 10K

2025 Vernon, New Jersey

Middle-distance Spartan with technical obstacles - last race before the move to Dubai

Dubai Marathon

2026 Dubai, UAE

Latest achievement - third marathon and first race in my new home city, February 2026

6

Major Races

3

Marathons

3

Spartan Races

5+

Years Running

Let's Connect

Happy to talk data engineering, analytics and AI tooling

Location

Dubai, UAE

Schedule a Meeting

Book 30-min call

Resume

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