A story in nine chapters · Meleik Hyman

From a one-way ticket to production AI.

I was born in Jamaica and came to the States as a kid. Seven thousand delivery runs paid for a computer science degree. Today I build retrieval and forecasting systems for federal programs — the kind that have to survive an audit, not just a demo.

Graph-RAGLLM evaluationDemand forecastingMLOps & driftAtlanta, GA
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Chapter 01 — The Crossing
Miles from home
0

I was born in Jamaica.
My family left the island for the States when I was a kid.

First generation.
Nobody ahead of me had done this here —
no map, no connections, no fallback.

So I built the map myself.
Everything after this is what that cost — and what it bought.

JAMAICAUNITED STATES

Immigrant kids learn systems thinking early. You arrive somewhere the rules aren't written down, and you reverse-engineer them fast — because there's no one to ask.

That instinct never left.

It just found bigger systems to take apart.

Chapter 02 — The Grind · 2017–2021

First in my family to do this here — so I paid for it myself.
No loans, no safety net — just a car, an app, and a schedule that never quit.

I drove for DoorDash between lectures and after them —
more than 7,000 runs, semester after semester,
on a full course load at FIU.

Every tuition payment was a stack of tips.
I learned to optimize routes the way I'd later optimize models.

Deliveries
0
delivery in progress…

The discipline it took to finish a degree that way is the same discipline I bring to production systems now.

But the car was only half the story.

The other half was written in code — and it started with a first internship.

Chapter 03 — The Craft · 2019–Present

Watch the code get deeper. That's the journey.

Six years, four employers, one direction: from checking other people's data to owning the systems that decide what a model is allowed to say.

Jun–Aug 2019 · Data Engineer Intern — The Boeing Company
First internship. Catch the bad data before anyone trusts it.
  • ▸Built automated data-quality checks over manufacturing telemetry — missing-value handling, deduplication, and outlier detection through boolean indexing — catching 95%+ of schema-drift issues before they reached reporting layers
  • ▸Combined production, quality, and supplier tables through database-style merges and concatenation, resolving overlapping records into a single reconciled dataset for engineering analysis
  • ▸Resampled high-frequency sensor readings to consistent reporting intervals with downsampling and interpolation, computing moving-window statistics to flag drift in line performance
  • ▸Presented the pipeline architecture and findings to senior engineering leadership at the intern showcase
Python · SQL · Hadoop · Spark
Jan–Aug 2020 · Analytics Engineer — Citrix
Prove the signal is real before anyone acts on it.
  • ▸Fit logistic-regression models predicting account churn and product adoption through Citrix's transition to Cloud subscriptions — evaluated with confusion matrices and ROC curves under class imbalance — delivering $250K in operational savings and a 12% retention improvement
  • ▸Tested which usage signals genuinely moved retention using correlation coefficients and significance testing rather than eyeballed dashboards, discarding relationships that failed to hold under a train/test split
  • ▸Reshaped customer telemetry from long to wide with pivots and hierarchical indexing, merging entitlement, usage, and support tables into a single customer-level analytical base table
  • ▸Validated recommendations through A/B testing that drove $500K in incremental annual revenue, with reporting adopted by 12 leadership teams
Python · SQL · Power BI · logistic regression · segmentation · A/B testing
2021 – Mar 2025 · Data Scientist / ML Engineer — Starbucks Technology
Forecasting demand across eleven thousand stores.
  • ▸Engineered demand features from timestamp-indexed store data — resampling transaction history to daily and weekly frequencies, computing rolling and exponentially weighted statistics to capture trend and seasonality across 11,000+ company-operated stores — validating $100M in annual savings
  • ▸Applied split-apply-combine group operations across store, region, and daypart hierarchies, using group-wise transforms and weighted averages to normalize demand signals and surface 8 critical drivers that reduced overstaffing incidents 15%
  • ▸Clustered SKUs by demand profile using unsupervised learning over engineered velocity and seasonality features — modeling demand per cluster rather than per item to improve forecast accuracy at finer time granularity
  • ▸Operated those systems in production with automated data-quality and model-drift checks, sustaining 99.9% uptime and preventing an estimated $2M in inventory and resource misallocation
Python · Azure ML · SQL · XGBoost · Random Forest · MLOps/CI-CD · drift detection
Mar 2025 → Now · Sr. AI/ML Engineer — Alyn Inc
Production AI that has to survive an audit.
  • ▸Own context construction for a Graph-RAG platform over NVD CVE/CWE/CPE and MITRE ATT&CK corpora — chunking strategy and overlap, hybrid term-based + embedding retrieval, and reranking to fit high-value context inside model limits — cutting analyst manual review time 60%+
  • ▸Engineer input and output guardrails as a first-class layer: PII redaction before third-party model APIs, prompt-injection defenses, and an explicit failure taxonomy separating quality failures from security failures — raising audit compliance from 72% to 98%
  • ▸Built the evaluation pipeline component-by-component and end-to-end — retrieval, embedding, and generation quality scored against a written guideline with AI-as-a-judge for relevance and faithfulness — producing reproducible model-selection artifacts for government review
  • ▸Route queries through a model gateway (unified interface, access control, cost tracking, rate-limit fallback) and tune the latency-cost tradeoff with semantic caching and batching, while sustaining classical ML that advanced AUC-ROC from 0.82 to 0.91 across 50+ high-dimensional datasets
Python · AWS Bedrock · S3 · LangChain/RAG · scikit-learn · SQL · Databricks
boeing_dq_checks.py
Technical depthlvl 1 / 4
Chapter 04 — The Turn · SOLID Lab · 2020–2021

A professor, a grant, and a lab with the lights on.

Part I — The project

In my senior year, one of my personal projects caught the attention of a graduate-level professor. He saw the work — and decided to become a voice for it.

Part II — The lab

With his backing I won a $6,000 research grant and joined FIU's SOLID Lab as an Undergraduate Research Fellow (NSF REU, 2020–2021). The hard part wasn't the modeling — it was alignment. Epidemiological, economic, and market series publish at different frequencies, so I resampled every source onto a shared time index and merged on date keys before anything was comparable.

Part III — Published

We tested pandemic severity against market indicators with correlation and regression, reporting confidence intervals alongside every point estimate — the discipline I still hold models to. It became a lead-author, peer-reviewed paper in Patterns (Cell Press), published openly with reproducible code on GitHub.

SOLID LAB · COVID-19 PREDICTION DASHBOARD MODEL BUILD · 2020
OUTBREAK MAP · LOWER 48signal ∝ projected load
NYCLACHIHOUMIAATLSEADENPHXBOS
observed forecast 95% band outbreak signal
14d
Forecast horizon
rolling projection
95%
Confidence band
model interval
10
Metros tracked
outbreak signals
Projected casesmodel · illustrative
MARAPRMAYJUNJULAUGforecast →
Projected deathsmodel · illustrative
MARAPRMAYJUNJULAUGforecast →
SOLID Lab, 2020 — Python pipelines over epidemiological, economic, and market data feeding a public COVID-19 forecast dashboard. Values shown are illustrative model projections.
Chapter 04 — Published

Peer-reviewed & published

Lead author · Patterns (Cell Press) · 2021
Data analytics to evaluate the impact of infectious disease on economy: a case study of the COVID-19 pandemic. Read paper →

M. Hyman, C. Mark, A. Imteaj, H. Ghiaie, S. Rezapour, A. M. Sadri, M. H. Amini. Patterns, 2(8): 100315, 2021.

Undergraduate Research Fellow · NSF REU Program · SOLID Lab · 2020–2021

The professor brought me into FIU's SOLID Lab — Sustainability, Optimization, and Learning for InterDependent networks — where I built the pipelines, the model, and the public dashboard behind the paper.

Chapter 05 — The Bet · Getting into entrepreneurship

After shipping other people's systems, I bet on my own.

DeepBlueAlpha
An end-to-end quantitative data platform
01
Ingest
SEC EDGAR API
02
Validate
data-quality checks
03
Score
Piotroski F · Altman Z · Beneish M
04
Forecast
Black-Scholes · Heston · Bates
Equities scored
0
Founder & engineer
1
AAPL · F-Score 8MSFT · Z-Score 6.2NVDA · M-Score −2.1AMZN · F-Score 7GOOGL · Z-Score 4.8TSLA · Heston σ 0.41META · F-Score 6JPM · Z-Score 2.95,000+ equities · scored nightlyAAPL · F-Score 8MSFT · Z-Score 6.2NVDA · M-Score −2.1AMZN · F-Score 7GOOGL · Z-Score 4.8TSLA · Heston σ 0.41META · F-Score 6JPM · Z-Score 2.95,000+ equities · scored nightly
Chapter 05 — The Bet
Part I — Going founder

After years of shipping other people's systems, I bet on my own. DeepBlueAlpha is a full-stack quantitative data platform, founded and built solo — nights and weekends, the same grind that paid for college, pointed at my own thing.

Part II — The platform

Ingestion is a batch workflow over the SEC EDGAR API, partitioning 5,000+ equities by issuer key across Azure Functions and Cosmos DB — so throughput scales horizontally and a failed run reprocesses idempotently without duplicating derived records.

Part III — The engineering problem nobody warns you about

Filing formats drift. XBRL tags and statement structures shift between filers and fiscal periods, so the readers have to stay backward compatible with historical filings instead of breaking on the first unexpected field.

Part IV — Every score is derived data

Piotroski F, Altman Z, and Beneish M all carry traceable lineage back to the source filing, so any output can be recomputed and audited. The analytical store is separated from the operational one to serve OLAP access patterns, and end-to-end integrity checks favor correctness over timeliness. Derivative pricing (Black-Scholes, Heston, Bates) is evaluated against historical benchmarks.

deepbluealpha.com →PythonAzure FunctionsCosmos DBSEC EDGAR APISQL
Chapter 06 — The Discovery · Persona cloning

One dev in a dark room. The discovery: don't write the worker's rules — clone the worker.

Persona cloning — a real person is transformed into a synthetic digital version, then deployed as multiple AI clones in different roles: AI Pilot (flight operations, schedules, safety), AI Analyst (data, insights, reports), AI Engineer (systems, technical problems, optimization), and AI CEO (strategy, operations, growth).
Persona cloning · one real person → many role-specialized AI personas
Chapter 06 — The Discovery
Part I — The dark room

It started as another after-hours personal project: one dev, one dark room. Then I stumbled onto something — instead of hand-writing a worker's rules, you could clone the worker.

Part II — Persona cloning

Capture the attributes of an actual worker — their judgment, patterns, and decision-making — and reproduce them as an AI/ML system built in that person's image. Clone one person into many personas, each given a role — pilot, analyst, engineer, CEO — and deploy that expertise at scale. I've been building on it ever since.

01 Observe — a worker's real decisions
↓
02 Encode — their attributes as model features
↓
03 Clone — a persona the model reproduces
↓
04 Deploy — every role, at scale, on demand
Chapter 07 — The Foundation

The degree the deliveries paid for — and the one I'm still paying for.

I finished the bachelor's while driving. I'm doing the master's while running production systems. The pattern hasn't changed — it just costs more sleep now.

In progress
M.S. Computer Science
Georgia Institute of Technology

Taken part-time alongside full-time engineering work — the same arrangement that got me through the first one.

Conferred 2021
B.S. Computer Science
Florida International University

Coursework: Data Structures & Algorithms · Database Systems · Machine Learning · Statistics · Distributed Systems

Peer-reviewed publication · lead author

Patterns (Cell Press), 2(8): 100315, 2021 — “Data analytics to evaluate the impact of infectious disease on economy.”

See Chapter 04 →
The stack, in full
Languages
Python (7+ yrs)SQL (5+ yrs)Bash / Shell
ML & data science
scikit-learnPyTorchTensorFlowXGBoostpandasNumPystatistical modelingfeature engineeringEDAanomaly detection
Generative AI
RAGGraph-RAGLangChainAWS BedrockLLM evaluationagentic pipelines
Data & pipelines
ETL / ELTPySparkSpark / Hadooplarge-scale dataset processingdata validation
Cloud & platforms
AWS (Bedrock, S3)AzureDatabricksCosmos DB
Environments & viz
LinuxDockerGitMLflowPower BITableau
Chapter 08 — A voice in AI

A model that never ships is just a science project. I care about the last mile — governance, drift, and trust.

Part II — Widening the door

I write and speak about what it actually takes to put machine learning into production — and about widening the door for people building their way up the hard way.

Writing

Essays on production ML, MLOps, and trustworthy AI. Coming soon.

Speaking

Available for talks and panels on shipping ML at scale. Get in touch below.

Mentoring

Especially for first-gen and self-funded students breaking into data science.

Chapter 09 — Contact

Let's build something that ships.

Meleik Hymanmelikehyman3@gmail.comLinkedIn