Engineering portfolio

Projects with architecture, algorithms, evaluation and lessons.

These are not thumbnail cards. Every project documents the problem, system design, models, data, evaluation strategy, failure modes and future roadmap—and Cortex is taught the project so visitors can question it interactively.

01
Predictive ML system

Customer Churn Intelligence

An end-to-end customer-retention system that converts behavioral, subscription and support signals into calibrated churn risk and human-readable intervention guidance.

Logistic regressionRandom forestGradient boostingCalibration curvesCost-sensitive thresholding
Advanced buildExplore project →
02
First-party AI architecture

Cortex Local Intelligence Engine

The local NLP, retrieval, confidence, MDP-state and reinforcement-feedback engine powering Ask Cortex without an external generative-model API.

TF-IDFCosine similarityBM25Rule/feature intent routingContextual policy selection
Active R&DExplore project →
03
Personalization system

Hybrid Recommendation Engine

A recommendation stack combining content similarity, behavioral events, skill gaps and exploration so learning recommendations remain useful even during cold start.

TF-IDF/content embeddingsCosine similarityWeighted implicit feedbackMMR-style diversificationContextual bandit exploration
Design + prototypeExplore project →
04
Assessment intelligence

Adaptive Interview Coach

A technical interview engine that samples from large domain banks, adapts difficulty, tracks weak concepts and schedules targeted review.

Weighted samplingBayesian-style mastery estimatesElo-inspired difficulty updatesSpaced repetitionContextual selection
Production foundationExplore project →
05
Search intelligence

SEO Experiment Platform

A controlled optimization platform for titles, metadata, internal links and content refresh decisions using editorial guardrails and bandit-style experimentation.

CTR baselinesBayesian/Thompson-style allocationContent-decay scoringInternal-link similarityMulti-objective reward
Active R&DExplore project →
06
Adaptive education

Game-Based Learning Engine

A technical game platform where challenge selection responds to mastery, error patterns and pace rather than using empty engagement mechanics.

Dynamic difficulty adjustmentMastery scoringSpaced challenge schedulingBandit content selection
Prototype familyExplore project →