1. Software Development

Provides end-to-end frontend testing with Playwright, utilizing Page Object Model and accessibility audits for robust test coverage.

Offers accessible, customizable UI components for Svelte using shadcn-svelte and bits-ui with pattern-based implementation.

Enables Svelte component story development, visual testing, and autodocs using Storybook's CSF format.

Integrates Base UI components (`@base-ui-components/react`) with Material UI (`@mui/material`) for custom React UI development.

Orchestrates OpenAI Codex CLI for parallel code generation, managing context and sessions to delegate and coordinate coding tasks efficiently.

Reviews code for quality using Linus Torvalds' 'good taste' philosophy, eliminating defensive code, special cases, and deep nesting.

Adds Room database persistence to Trail-Sense Android app, handling entities, DAOs, repositories, and migrations for model data storage.

Provides expert guidance for EMP CLI, Rspack, and module federation in micro-frontend development, build configuration, and debugging.

Debugs memory errors, crashes, and segfaults in applications using Valgrind integrated with nextest via pre-configured profiles.

Systematic debugging workflow: reproducing bugs with real data, reducing test cases to minimal examples, and adding regression tests to prevent recurrence.

Analyzes code performance using callgrind and valgrind with nextest integration to identify bottlenecks and optimize instruction counts and cache behavior.

Provides guidelines for using facet crates (facet-json, facet-toml, facet-args) as alternatives to serde for consistent internal tooling in Rust development.

Provides orientation for facet-format JIT deserialization, covering tiering, fallbacks, key types, and debugging strategies for JIT code changes.

Creates asynchronous background tasks and workflows using SQS or Hatchet for queue-based job processing in application code.

Debugs and fixes billing endpoints for subscriptions, invoicing, and Stripe integrations, supporting both legacy and v2 architecture.

Manages API versioning by handling breaking changes, creating version files, data transformation, and ensuring backward compatibility.

Creates integration test cases for billing/subscription features and endpoints in the Autumn billing system.

Guides React Server Components (RSC) in Next.js for server vs client component usage, data fetching, and composition patterns.

Guides implementation of Next.js Server Actions for form handling, data mutations, and revalidation in App Router.

Creates and manages Next.js App Router API routes, handling HTTP methods and streaming responses for RESTful endpoints.

Assists in creating and managing Next.js App Router routes, layouts, dynamic routes, and error boundaries for frontend applications.

Guides implementation of authentication and authorization patterns in Next.js, including NextAuth, middleware, and session management.

Provides a suite of tools for constructing multi-component Claude.ai HTML artifacts with React, Tailwind CSS, and shadcn/ui, supporting state management and routing.

Guides developers in constructing MCP servers for LLM integration with external APIs using Python (FastMCP) or Node/TypeScript (MCP SDK).