Army Engineer · Duke BME & ECE

Jason Tran

I Deliver High-Integrity Technology For Safety-Critical Applications.

Portfolio Projects

0+ Hours

What I've built and learned along the way.

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Python Automation Generative AI

STORM DAT: Automating Government Document Compliance So Analysts Can Focus on What Matters

A web-based application for automating government document compliance, reducing manual review time and improving accuracy.

Python Flask Docker Whisper

Mobile Development Generative AI

Mindfulness Coach: Building a Fully Offline, On-Device AI Coaching App with React Native and Google MediaPipe

A deep dive into the architecture and engineering of a privacy-first mobile mindfulness coach that runs entirely on-device using React Native and Google MediaPipe's on-device LLM capabilities.

React Native Expo Typescript MediaPipe

Web Development

MyKpopLists: Building a Scalable Social Platform for K-pop Enthusiasts

MyKpopLists is a full-stack social networking platform tailored for K-pop fans, featuring comprehensive artist databases, privacy-aware social interactions, AI-powered content tagging, and gamified community engagement.

Laravel Vue.js Inertia.js PostgreSQL +12 more

Linux & Networking

Personal Cloud Infrastructure: Transforming Legacy Hardware into a Secure, Self-Hosted Ecosystem

This project chronicles the journey of repurposing a nine-year-old gaming PC into a robust personal cloud and application server. It explores the motivations behind reclaiming digital independence, the architectural decisions made to ensure data sovereignty, and the technical challenges overcome in creating a secure, scalable, and versatile home lab environment.

Docker TrueNAS Scale ZFS Tailscale +1 more

Linux & Networking

PWOSPF Router: Bridging Classical Networking and Modern SDN with Interactive Virtualization

Building a production-grade network router that implements the Routing Information Protocol (RIP) using low-level C, integrated it with Software-Defined Networking (SDN) through OpenFlow, and packaged everything into an interactive, browser-based simulation environment.

C Docker Mininet OpenFlow +2 more

Biomedical Engineering Embedded Systems

EOG Sleep Mask: Detecting Secondary Sleep Strokes in Real-Time

A wearable, real-time stroke detection system disguised as a comfortable sleep eye mask. By utilizing electrooculography (EOG) to track eye movement and an onboard microcontroller to perform real-time signal processing, the device acts as an automated sentinel.

Arduino Op Amp EOG

Web Development

Building a Modern Developer Portfolio: From Terminal Emulation to Content Architecture

A full-stack developer portfolio platform built with Astro 5, React 19, and TypeScript—a content-first website that showcases technical projects, tutorials, and professional experience through multiple interactive interfaces.

Astro React Typescript Three.js +4 more

Biomedical Engineering Python Automation

VitalCheck API: Building a Multi-Domain Health Intelligence Engine with Python, FastAPI, and Production-Grade ML

VitalCheck is a production-deployed REST API that delivers real-time health risk assessments across ten medical and wellness domains. Built with Python, FastAPI, and a suite of machine learning models, it provides a unified interface for clinical and biometric predictions — from diabetes and stroke risk to MRI-based brain tumor classification.

Python FastAPI UV Pydantic +3 more

Embedded Systems

FPGA Wordle: Building a Complete Game Console from Transistors to Touchpoints

A deep dive into the design and implementation of FPGA Wordle, a fully hardware-implemented word-guessing game that runs on a custom five-stage pipelined MIPS processor, with real-time VGA display and PS/2 keyboard input — all built from first principles in Verilog and assembly.

FPGA MIPS Verilog WebAssembly

Explore Topics

Biomedical Engineering

Medical device software, health data analysis, biomedical signal processing, and clinical data applications with regulatory guidance.

Embedded Systems

Microcontroller firmware, IoT devices, FPGA digital logic design, and hardware-software integration.

Generative AI

LLM-powered applications, RAG pipelines, AI chatbots, and intelligent automation tools built with any language model API or open-source model.

Linux & Networking

VPS & NAS setup, Docker deployments, self-hosted services, reverse proxy configuration, and automated Linux environment management.

Mobile Development

Cross-platform iOS and Android apps built with React Native and Expo, with custom REST API backends and cloud data sync.

Web Development

Full-stack web applications, responsive websites, REST APIs, and modern web experiences.

Python Automation

Workflow automation, data pipelines, web scraping, REST APIs, data apps with Streamlit, Flask web services, and ML-powered tooling — all in Python.

Latest Posts

Python Automation Web Development

Flight Disruption Intelligence: A Full-Stack Delay Predictor on Public Data and Free Infrastructure

An end-to-end flight delay prediction platform spanning medallion lakehouse, calibrated LightGBM with SHAP explanations, Spark Structured Streaming, dbt reliability marts, FastAPI serving, and a SvelteKit dashboard — built entirely on public BTS/NOAA/OpenSky data, self-hostable for $0/year, with a contract module that enforces leakage prevention across every pipeline stage.

Python Apache Spark dbt LightGBM +12 more

Python Automation

DuckDB as an Analytical Read Layer: Querying a Gold Store Without a Database Server

DuckDB is an in-process analytical database that runs inside your Python application, reads Parquet files natively, and handles complex SQL including window functions, QUALIFY, and MEDIAN — with no server to manage. This tutorial covers the read-only connection pattern used in the flight disruption serving layer, thread-safety in a FastAPI threadpool, and the queries that power the reliability API.

Beginner

9 minutes

Aug 10, 2026

Python DuckDB FastAPI SQL +4 more

Python Automation

FastAPI for ML Serving: Lifespan, Pydantic Validation, and Graceful Degradation

FastAPI's type annotations, Pydantic models, and lifespan context manager solve three common ML serving problems: loading expensive artifacts before requests start, validating inputs without manual checks, and returning useful errors when dependencies aren't ready. This tutorial walks through the patterns used in the flight disruption prediction API.

Beginner

10 minutes

Aug 10, 2026

Python FastAPI Pydantic API Integration +2 more

Python Automation

SQL Analytics You Can Actually Trust: Building Reliability Marts with dbt

dbt turns SQL SELECT statements into tested, documented, dependency-aware data models. This tutorial builds the flight reliability marts used by the dashboard — airport, route, and carrier delay rates — starting from a staging view and layering on not-null, uniqueness, relationship, and range tests that catch data quality problems before they reach the API.

Beginner

10 minutes

Aug 10, 2026

dbt SQL DuckDB Data +3 more

Python Automation

Calibration, SHAP, and ONNX: Building a Delay Predictor That's Actually Honest

ROC-AUC tells you how well a model ranks flights by delay risk. It doesn't tell you whether a 40% prediction means 40% of flights actually get delayed. Those are different properties, and the second one matters when you're building a risk gauge. This tutorial covers isotonic probability calibration, SHAP explanations per prediction, ONNX export with a parity test, and why all three belong in the same ML lifecycle.

Advanced

40 minutes

Aug 10, 2026

Python LightGBM SHAP ONNX +3 more

Python Automation

Making Data Leakage a Pipeline Failure, Not a Debugging Session

A rolling delay rate that includes same-day flights is leakage. A temporal split that shuffles randomly is leakage. In a flight delay prediction pipeline, leakage produces models that look great on held-out data and fail immediately in production. This tutorial covers the shared contract module, Spark window functions bounded to strictly prior days, schema assertions that catch banned features before training, and a temporal split that respects the direction of time.

Intermediate

25 minutes

Aug 10, 2026

Python Apache Spark PySpark Machine Learning +5 more

Web Development Generative AI Python Automation Biomedical Engineering

EvidenceLens: A Self-Hosted Biomedical Search Engine with Hybrid Ranking and Conflict-of-Interest Transparency

EvidenceLens unifies 20+ fragmented medical literature sources into a single hybrid-ranked interface, surfaces author conflict-of-interest badges from public CMS Open Payments data, and runs answer synthesis entirely on the user's own inference key — zero recurring backend cost.

Go Python TypeScript NestJS +11 more

Python Automation

Building a Multi-Stage ETL That Doesn't Lose Work Under Failure with NATS JetStream

A walkthrough of the backpressure-aware ingestion pipeline in EvidenceLens: durable consumers, manual acknowledgment, how a 60-second ack_wait caused a redelivery storm under load, and a backpressure loop that pauses consumption when the downstream indexer falls behind.

Intermediate

25 minutes

Aug 5, 2026

Python Go NATS JetStream +2 more

Python Automation

Combining Four Search Signals Without Making Them Agree: Reciprocal Rank Fusion

BM25, vector similarity, citation PageRank, and recency decay return scores on incompatible scales. Reciprocal Rank Fusion fuses them by rank position rather than raw score — no normalization required, robust to distribution shifts between scorers.

Beginner

10 minutes

Aug 5, 2026

Python BM25 Vector Search Meilisearch +2 more

Python Automation

Measuring Search Ranking Quality Without Labeled Data: Team Draft Interleaving

Position bias makes raw click-through rate a misleading metric for search quality. Team draft interleaving weaves two ranked lists together so each algorithm gets equal position exposure, letting you count statistically meaningful wins per query without any relevance labels.

Advanced

33 minutes

Aug 5, 2026

Python XGBoost Machine Learning scikit-learn

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