Database

Rails testing with RSpec and Minitest, covering model specs, request specs, system tests, factories, and test design.

Bun runtime fundamentals including speed optimizations, built-in APIs, and package management

Using Bun as a bundler for frontend assets and as a fast test runner

Node.js compatibility layers in Deno and Bun for running existing npm packages and Node APIs

Deno runtime fundamentals including permissions, module system, and built-in tooling

Deno Deploy edge functions for globally distributed serverless applications

Elysia web framework on Bun for type-safe, high-performance HTTP APIs

Fresh full-stack web framework for Deno with islands architecture and zero client JS by default

Step-by-step strategies for migrating existing Node.js applications to Deno or Bun

Astro fundamentals including project structure, components, islands architecture, and templating syntax

Content collections in Astro for managing Markdown, MDX, JSON, and YAML content with type-safe schemas

Deploying Astro sites to Vercel, Netlify, Cloudflare Pages, and other platforms

Using React, Vue, Svelte, and other UI framework islands within Astro pages

Middleware patterns in Astro for authentication, request modification, response headers, and shared context

File-based and dynamic routing in Astro including static paths, rest parameters, and route priority

Server-side rendering in Astro with adapters for Node, Vercel, Netlify, Cloudflare, and Deno

View Transitions API in Astro for smooth page navigation, animations, and persistent state

Active search, typeahead, and autocomplete patterns using HTMX triggers and debouncing

Combining Alpine.js with HTMX for client-side state and interactivity alongside hypermedia-driven updates

Server-side patterns for HTMX including partial templates, response headers, and middleware

Core HTMX attributes and fundamental patterns for hypermedia-driven web development

Form handling, validation, and submission patterns with HTMX

Infinite scroll and lazy loading patterns using HTMX revealed and intersect triggers

Progressive enhancement strategies for building HTMX applications that work without JavaScript

Real-time updates with the HTMX WebSocket extension and server-sent events

Animation utilities, transitions, custom keyframes, and motion patterns with Tailwind CSS

Common UI component patterns including cards, navbars, forms, modals, and badges built with Tailwind CSS

Customizing tailwind.config.js to extend themes, add custom colors, fonts, spacing, and configure content paths

Dark mode strategies including class-based toggling, media queries, and CSS variable theming with Tailwind CSS

Utility-first CSS fundamentals with Tailwind including class composition, spacing, typography, and layout primitives

Writing custom Tailwind CSS plugins to add utilities, components, base styles, and variants

Responsive breakpoints, mobile-first design patterns, and adaptive layouts with Tailwind CSS

Tailwind CSS v4 breaking changes, new features, and migration guide from v3 to v4

Biome linter, formatter, and code analysis configuration for JavaScript and TypeScript projects

esbuild bundling, transpilation, and build scripting for ultra-fast JavaScript builds

ESLint and Prettier combined setup for JavaScript and TypeScript linting and formatting

Rollup configuration for building JavaScript libraries with tree shaking and multiple output formats

SWC compiler configuration for fast TypeScript and JavaScript transpilation and minification

TypeScript compiler configuration, project references, and tsconfig best practices

Vite configuration, plugins, and dev server optimization for modern JavaScript projects

Webpack 5 setup, optimization, code splitting, and plugin configuration for JavaScript applications

Anthropic Claude API integration for messages, streaming, and tool use

Text embeddings and semantic search with vector databases for LLM applications

Function/tool calling patterns for connecting LLMs to external APIs and data sources

LangChain orchestration for chains, agents, memory, and retrieval workflows

OpenAI API integration patterns for chat completions, embeddings, and assistants

Building retrieval-augmented generation pipelines with document ingestion, retrieval, and synthesis

Streaming LLM responses with SSE, WebSockets, and backpressure handling

Vercel AI SDK for streaming LLM responses in React, Next.js, and edge runtimes

Build artifact handling, dependency caching, container image management, and artifact registry patterns for CI/CD

Buildkite pipelines including dynamic pipeline generation, agent targeting, plugins, and hybrid cloud CI/CD

CircleCI configuration including orbs, workflows, executors, and pipeline parameterization for CI/CD

Blue/green, canary, rolling, and feature-flag deployment strategies with platform-specific implementation patterns

Managing secrets, environment variables, deployment environments, and configuration across CI/CD pipelines

GitHub Actions workflows for CI/CD automation including reusable workflows, matrix builds, and deployment pipelines

GitLab CI/CD pipelines including multi-stage builds, includes, rules, and Auto DevOps configuration

Jenkins declarative and scripted pipelines including shared libraries, agents, and plugin-based CI/CD workflows

Expert guidance on data cleaning and preprocessing techniques for preparing raw data for analysis and modeling.

Expert guidance on feature engineering patterns for transforming raw data into predictive ML features.

Expert guidance on Jupyter notebooks for interactive data exploration, documentation, and reproducible analysis.