14 AI agent skills to speed up developers
A product-owner map you can hand to engineering
AI consulting to help move ideas forward.
I help startups, SaaS teams, and agencies design and ship AI systems, document workflows, and complex web platforms. Your team and agents run the system after handoff.
Tricks I use to ship fast and save tokens
Choose the right level of involvement
Choose strategic guidance, focused implementation, or embedded development based on what your project needs. Every engagement is designed so your team and agents can run the system after handoff.
Advisory
Strategic guidance for AI architecture, product planning, technical decisions, and implementation reviews.
Recommended
Builder Bundle
End-to-end ownership of a defined initiative, from planning and architecture through implementation and handoff.
Development
Senior engineering capacity working directly with your team to own complex features, integrations, AI systems, and web platforms.
What I build with
Application architecture, AI systems, document intelligence, and production operations.
Application architecture
Typed product surfaces, APIs, and multi-tenant foundations.
- Next.js
- TypeScript
- React
- GraphQL
- API design
- Multi-tenant SaaS
AI systems
Agents, retrieval, and evaluation wired into real products.
- LLM integrations
- AI agents
- Retrieval and RAG
- Evaluation
- Model routing
- Cost and latency
Document intelligence
PDFs and spreadsheets turned into verified structured data.
- OCR
- Structured extraction
- Evidence linking
- PDF and spreadsheet workflows
- Long-running processing
- Human verification
Production systems
Auth, billing, jobs, and observability that hold under load.
- PostgreSQL
- Authentication and SSO
- Billing
- Background jobs
- Real-time systems
- Observability
Senior engineer with production experience
Calvin is a senior product engineer. He works across frontend architecture, backend systems, AI integrations, document processing, authentication, billing, and infrastructure. He focuses on products where technical decisions decide whether you can ship.
Calvin Maighan
10+ years of building ambitious products
Open-source client libs for shared UI state, theme, i18n.
Libraries
| Package | What it does | Repo |
|---|---|---|
| active-state | Tiny keyed pub/sub store — React, DOM bindings, persist / shared / SSR | CalvinMaighan/active-state |
| active-theme | Mode + color on :root — persist by default, /lite, /state + <ActiveTheme /> | CalvinMaighan/active-theme |
| active-i18n | Typed dictionaries + useText() / t() — persist by default, /lite, /state + <ActiveI18n /> | CalvinMaighan/active-i18n |
Together
import { ActiveState, useActiveState } from "active-state/react";
import { ActiveTheme } from "active-theme/state";
import { ActiveI18n } from "active-i18n/state";
import { useText } from "active-i18n/react";
<>
<ActiveState init={state} ssr />
<ActiveTheme init={theme} />
<ActiveI18n init={i18n} />
{children}
</>
const [layout, setLayout] = useActiveState(LAYOUT);
const [mode, setMode] = useActiveState(THEME);
const { t, setLocale } = useText();One bus for prefs. Theme paints data-theme / CSS vars. useText() gives t under <ActiveI18n />; setLocale writes the bus.