Stack
Technical capability, grouped by function.
AI Engineering & LLM Systems
Generative AI · Natural language processing (NLP) · Agentic AI & multi-agent systems · MCP (Model Context Protocol) · RAG · hybrid retrieval · reranking · Semantic search & embeddings · Vector databases · LangChain · LangGraph · Hugging Face Transformers · Fine-tuning (LoRA) · IndoBERTweet · Context & prompt engineering · Structured outputs & tool calling · LLM evaluation & LLM-as-judge · RLHF/SFT evaluation · Guardrails & AI safety · Prompt caching & cost optimization
Backend & AI Product Engineering
Python · FastAPI · REST APIs · API design · SQL · PostgreSQL · Relational databases · Caching · Asynchronous processing · Celery · Docker · Git · Backend architecture · Workflow automation
Full-Stack Web & TypeScript
TypeScript · Next.js (App Router) · React · Node.js · Tailwind CSS · Drizzle ORM · PostgreSQL · Server actions · OIDC / OAuth (Cognito) · PWA · Monorepo (pnpm) · Vitest
Data Engineering & Analytics
PySpark · ETL pipelines · Big data processing · Batch processing · Data modeling · Schema design · Data warehousing · BigQuery · Looker Studio · Data visualization · Dashboard design · Reporting automation
Data Science & Machine Learning
Python · R · SQL · Scikit-learn · NumPy · Pandas · Matplotlib · Seaborn · Jupyter · Exploratory data analysis (EDA) · Predictive modeling · Supervised & unsupervised learning · Linear & logistic regression · Ridge & lasso · Decision trees · Random Forest · SVM · k-NN · Naive Bayes · Gradient boosting · XGBoost · LightGBM · K-Means · DBSCAN · Hierarchical clustering · PCA · t-SNE · Ensembles (hard/soft voting, weighted voting, stacking, bagging, boosting) · Deep learning · Neural networks · ANN / MLP · Feature engineering & selection
Statistics & Time Series
Descriptive statistics · Distribution analysis · Correlation analysis · Stationarity testing (ADF) · Seasonal decomposition · ACF / PACF · Time-series forecasting · ARIMA · ARIMAX · SARIMA · SARIMAX · LSTM · GRU · Demand forecasting
Model Evaluation & Tuning
Cross-validation (k-fold, stratified) · GridSearchCV · RandomizedSearchCV · Hyperparameter tuning · Class imbalance (SMOTE, class weighting) · Regularization · Precision / recall / F1 · ROC-AUC · Confusion matrix · MAE / RMSE / MAPE · Model comparison & selection · Error analysis
Computer Vision & Media AI
TensorFlow · PyTorch · Keras · Transfer learning · OpenCV · CNN classification · Image classification · Object detection · Object tracking · Image enhancement · Medical image analysis · Thermal imaging · Deepfake detection · YOLOv11 · MediaPipe · ByteTrack · Speech recognition (ASR) · Whisper · FFmpeg · Image generation & editing · Stable Diffusion · ComfyUI · Automatic1111
Cloud & Deployment
AWS ECS · AWS S3 · AWS Lambda · Serverless architecture · DynamoDB · CloudFront · Self-hosted LLM gateway (9router) · CI/CD · GCP · BigQuery · Compute Engine · Vertex AI · Streamlit · Static hosting
AI-Accelerated Engineering
Most of this site, including the chatbot in the corner, I built pair-programming with AI agents. It is how a one-person team ships at this pace.
AI coding agents (Claude Code, Hermes) · Spec-driven development · AI code review & auditing · Eval-driven development · LLM training data quality · Human-in-the-loop workflows · Rapid AI prototyping
Product, Research & Collaboration
Business problem framing · Technical documentation · Stakeholder reporting · Async collaboration · Fast iteration · Startup leadership · Research writing · Team leadership