https://github.com/iamnortey/portfolio
Public proof hub for Isaac Nortey: Connected AI Operator work, architecture, case studies, and governed execution artifacts.
https://github.com/iamnortey/portfolio
architecture case-studies connected-ai-operator governed-ai portfolio proof-of-work systems-design
Last synced: 11 days ago
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Public proof hub for Isaac Nortey: Connected AI Operator work, architecture, case studies, and governed execution artifacts.
- Host: GitHub
- URL: https://github.com/iamnortey/portfolio
- Owner: iamnortey
- License: mit
- Created: 2026-01-10T19:56:02.000Z (5 months ago)
- Default Branch: main
- Last Pushed: 2026-05-26T14:31:03.000Z (13 days ago)
- Last Synced: 2026-05-28T05:34:50.716Z (11 days ago)
- Topics: architecture, case-studies, connected-ai-operator, governed-ai, portfolio, proof-of-work, systems-design
- Homepage: https://inortey.com
- Size: 50.8 KB
- Stars: 0
- Watchers: 0
- Forks: 0
- Open Issues: 1
-
Metadata Files:
- Readme: README.md
- License: LICENSE
- Security: SECURITY.md
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README
# Isaac Nortey — Engineering Portfolio
> Public proof hub. Case studies, architecture, decision records, runbooks, and proof-pack artifacts from production systems and the Connected AI Operator practice.
**Connect. Govern. Execute. Prove.**
[](https://github.com/iamnortey)
[](https://linkedin.com/in/inortey/)
[](https://inortey.com)
---
## Featured Projects
| Project | Description | Stack | Links |
|---------|-------------|-------|-------|
| **Ojanaa** | WhatsApp-native POS super-app with invoice trust loop | TypeScript, React Native, Next.js, Supabase | [Case Study](./case-studies/ojanaa.md) · [Docs](https://github.com/iamnortey/ojanaa-docs) |
| **Ninolex** | Pronunciation infrastructure for AI voice applications | TypeScript, Python, Next.js, Modal | [Case Study](./case-studies/ninolex.md) · [Docs](https://github.com/iamnortey/ninolex-docs) |
| **Ninobyte** | Connected AI Operator doctrine and three-agent local AI operating system | TypeScript, Python, Claude Skills, MCP | [Case Study](./case-studies/ninobyte.md) · [Docs](https://github.com/iamnortey/ninobyte-docs) |
| **Ninolex-GH** | Open Ghanaian pronunciation dictionary | Python, W3C PLS | [Repo](https://github.com/iamnortey/ninolex-gh) |
| **Prepnest** | Educational content platform for exam preparation | React Native, Sanity CMS, Manim | [Case Study](./case-studies/prepnest.md) · [Docs](https://github.com/iamnortey/prepnest-docs) |
---
## Engineering Principles
### Phase-Gated Development
No Phase 2 features until Phase 1 passes all quality gates. Every phase has explicit acceptance criteria. Scope creep is prevented by design.
### Data-First Thinking
Get the schema and domain model right before building features. The data model is the foundation everything else builds on.
### Validation-First
Every claim traces back to evidence. Skills are validated against official documentation. Decisions are logged in ADRs.
### Operational Clarity
Runbooks, decision logs, and audit trails are first-class citizens — not afterthoughts. Systems are designed to be observable, debuggable, and maintainable.
### Governed Execution
AI is wired into real systems through approval gates and read-first defaults. Every workflow produces a portable proof-of-work artifact — a README, a screenshot, a recorded session, or a sanitized evidence pack — that a reviewer can act on without seeing the private internals.
---
## Technical Stack
| Layer | Technologies |
|-------|-------------|
| **Languages** | TypeScript, Python, SQL (PostgreSQL / PLpgSQL) |
| **Frontend** | React, Next.js, React Native, Expo |
| **Backend** | Node.js, Next.js API Routes, Modal (serverless) |
| **Data** | PostgreSQL, Supabase, Typesense |
| **AI / Voice** | Claude, ElevenLabs, Vapi, CMUdict |
| **Infrastructure** | GitHub Actions, Supabase, Modal |
---
## Role Alignment
Evidence mapped to specific engineering roles:
- [Platform Engineering](./roles/platform-engineering.md)
- [SRE / Reliability Engineering](./roles/sre-reliability.md)
- [Data Infrastructure](./roles/data-infrastructure.md)
- [Security Engineering](./roles/security-corporate.md)
- [Full-Stack / Product Engineering](./roles/fullstack-product.md)
- [Technical Support Engineering](./roles/technical-support-engineering.md)
---
## Architecture Samples
- [Ojanaa System Architecture](./architecture/ojanaa-system.md)
- [Invoice Trust Loop Flow](./architecture/ojanaa-trust-loop.md)
- [Ninolex Pronunciation Pipeline](./architecture/ninolex-pipeline.md)
---
## Decision Records
Sample ADRs demonstrating technical decision-making:
- [ADR-001: Phase-Gated Development](./adrs/001-phase-gated-development.md)
- [ADR-002: Idempotent Webhook Handlers](./adrs/002-idempotent-webhooks.md)
- [ADR-003: API-First Surface Design](./adrs/003-api-first-surface.md)
---
## Operational Artifacts
- [Incident Response Runbook](./runbooks/incident-response.md)
- [Daily Workflow Runbook](./runbooks/daily-workflow.md)
---
*Core implementations remain in private repositories. This portfolio showcases architecture, decisions, operational artifacts, and proof-pack outputs from the Connected AI Operator practice. Public-safe by design — no client data, credentials, or internal repository contents.*