Mathematics · Data Engineering · Data Science

Mohammed
Rahman

Mathematics graduate building end-to-end data systems — from rigorous statistical modeling to production data pipelines on the cloud. I turn messy data into things that hold up under proof.

01

Two tracks, one foundation

I work the full distance between theory and production. A math background gives me the modeling rigor; hands-on work with the modern data stack gives me the engineering. Below is the same person, viewed two ways.

Data Engineering build

Designing pipelines and warehouses that move and reshape data reliably — orchestration, modeling, and cloud infrastructure. Comfortable from SQL optimization down to bootloaders and paging.

Data Science model

End-to-end predictive modeling grounded in statistics — feature work, model selection, and honest evaluation. I care about what a metric actually means, not just that it went up.

02

Toolkit

Languages
PythonSQLR JavaJavaScriptC++ C#HTML/CSS
Data & ML
PandasNumPyscikit-learn TensorFlowPyTorchSparkML XGBoostTableauPower BI
Cloud & DevOps
AWSS3Lambda RDSECSDynamoDB TerraformGitHub ActionsJenkins
Databases
PostgreSQLMySQLMongoDB GraphQLREST APIs
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Selected projects

P.01

A/B Test Analyzer

Python · SciPy · Streamlit · Docker · GitHub Actions

A statistical engine for experiment analysis built from first principles — Welch's t-test, Mann-Whitney U, Bonferroni and Benjamini-Hochberg corrections, and exact noncentral-t power analysis — behind a Streamlit interface where a product manager uploads an experiment CSV and gets a full report with effect sizes, bootstrap CIs, and minimum-detectable-effect diagnostics. Every guarantee is verified by Monte Carlo simulation, not assumed.

5.3%
Type I error, calibrated vs 5% nominal
57.6% → 5.4%
error rate, uncorrected → BH (FDR)
360
tests vs SciPy / statsmodels / R benchmarks
P.02

Customer Churn Prediction

Python · scikit-learn · XGBoost · SHAP · Streamlit

End-to-end ML pipeline comparing Logistic Regression, Random Forest, and XGBoost on telecom customer records, with SHAP interaction analysis to surface the real drivers of churn. Deployed as a live Streamlit app.

0.85
ROC-AUC (held-out)
7,043
customer records
3
models compared
View repository ↗
P.03

Predicting Apartment Sale Prices · Queens, NY

R · randomForest · rpart · ggplot2

Compared regression tree, OLS, and random forest models on Queens co-op and condo transactions. Used permutation importance to rank predictors and handled high-missingness features with median imputation plus missingness indicators.

0.79
out-of-sample R²
$6.5K
RMSE gain vs OLS
521
transactions
View repository ↗
P.04

Brazilian E-Commerce Analytics

PostgreSQL · SQL · Power BI · Python

A 9-script PostgreSQL analytics pipeline over 100K+ Olist orders, with reusable views for revenue, retention, delivery, and seller performance. Surfaced a clear link between delivery speed and review scores in a 5-page Power BI dashboard.

$15.4M
revenue analyzed
8.11%
late-delivery rate
1.5★
late vs on-time gap
View repository ↗
P.05

E-Commerce Data Platform Rebuild

Python · Kafka · Airflow · Snowflake · dbt

A production-grade modern data stack pipeline streaming 100K+ Olist e-commerce orders through Kafka into Snowflake, orchestrated by Airflow DAGs. dbt models the raw data into a dimensional schema with 21 passing tests and full generated documentation.

100K+
orders streamed
21
dbt tests passing
91.88%
on-time delivery rate
View repository ↗
04

Background

Experience
Middle School Math & ELA Teacher
Practice Benefit Corp
Apr 2025 — Present
  • Design assessments and use performance data to improve instructional outcomes.
  • Communicate complex quantitative concepts to diverse learners.
Data Entry Specialist
Carmichael International Service
May 2022 — May 2024
  • Processed U.S. Customs documentation, improving workflow efficiency by 15%.
  • Performed data validation, reconciliation, and compliance checks for data integrity.
Education
M.A. in Mathematics
Queens College, CUNY — Flushing, NY
Enrolled · Starting Fall 2026
  • Graduate study extending undergraduate work in algebra, analysis, and cryptography.
B.A. in Mathematics
Queens College, CUNY — Flushing, NY
Graduated Spring 2026
  • Real Analysis, Abstract Algebra, Point-Set Topology, Multivariable Calculus.
  • Post-Quantum Cryptography, Data Science & Machine Learning.
  • Resumed studies in 2024 after two years in data operations.
Certifications
IBM Data Science Professional Certificate
Educative Computer Science Bootcamp

Let's build something
that holds up.

Open to Data Engineering and Data Science roles. The fastest way to reach me is email.