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Available for opportunities

Consulting Portfolio

Lawrence Johnson — Verification-First Systems Architect

I build proof-driven platforms that blend distributed systems, AI orchestration, and formal verification. Skilled in Python/FastAPI, TypeScript/Next.js, PostgreSQL optimization, and cloud-native delivery.

Case StudiesView Source CodeLive PlatformEmail Lawrence

Technology Stack

Each tool links to official documentation.

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Languages

PythonTypeScriptLean 4SQLPLpgSQL

Backend

FastAPICelerySQLAlchemyAlembicPydantic

Frontend

Next.js 14React 18Tailwind CSSVercel Analytics

Infrastructure

DockerDocker ComposeKubernetesHelmRenderVercel

Data & Storage

PostgreSQLRedisMinIO (S3)Neon (Serverless PG)

AI & Verification

Lean 4 + MathlibPyTorchSymPyNetworkXSNNTorchDeepSeek

Auth & Services

Firebase AuthGitHub ActionsOAuth 2.0REST APIs

Architecture Highlights

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Distributed Microservices

FastAPI + Celery workers with PostgreSQL, Redis, MinIO

6 services, 11 API routers, 738-line CLI

AI Agent Orchestration

Hub-and-spoke agent system with logic + retrieval spokes

8 agent types, neurosymbolic + neuromorphic

Formal Verification Pipeline

Lean 4 proof assistant (Mathlib 4.15.0) via HTTP API

Mathematical proof validation and correctness checking

CI/CD & Automation

GitHub Actions for automated resource ingestion

Weekly automated imports, schema validation

Cloud-Native Deployment

Multi-cloud deployment with Vercel, Render, Neon, and Kubernetes

Production-grade infrastructure and container orchestration

Knowledge Pipeline

Automated ingestion → ontology classification → API-served content

11 categories, confidence scoring

System Topology

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system-architecture.txt
┌─────────────────────────────────────────────────────────────────┐
│                     VERCEL (Frontend)                           │
│                  Next.js 14 App Router                          │
│                  https://themaff.club                           │
└────────────────────────┬────────────────────────────────────────┘
                         │ HTTPS
                         ▼
┌─────────────────────────────────────────────────────────────────┐
│                   RENDER (Backend API)                          │
│                   FastAPI :8000                                 │
│  ┌──────────────┬──────────────┬──────────────┬─────────────┐  │
│  │ 11 Routers   │ Firebase     │ Pydantic     │ 738-line    │  │
│  │ REST + WS    │ Auth         │ Validation   │ CLI         │  │
│  └──────────────┴──────────────┴──────────────┴─────────────┘  │
└────────┬────────┬────────┬────────┬─────────────────────────────┘
         │        │        │        │
         ▼        ▼        ▼        ▼
    ┌────────┬────────┬────────┬─────────┐
    │   DB   │ Redis  │ MinIO  │ Worker  │
    │  :5432 │ :6379  │ :9000  │ Celery  │
    │  PG15  │ Cache  │   S3   │ Tasks   │
    └────────┴────────┴────────┴─────────┘
                                    │
                                    ▼
                            ┌───────────────┐
                            │   Lean 4      │
                            │   :8100       │
                            │  Mathlib      │
                            └───────────────┘

Live & Interactive

Click to explore real working features within the platform.

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Developer Tools Suite

6 ToolsUtilitiesReact/TypeScript

Dashboard & Analytics

Real-timeData VisualizationReact

Content Management

Full-StackUser InterfaceForms

Learning Platform

Next.jsContentNavigation

Admin Operator

BackendRole-BasedSystem

API Design Sample

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REST API Endpoints
GET/api/v1/roadmapsList all learning roadmaps
GET/api/v1/roadmaps/{slug}Get detailed roadmap by slug
POST/api/v1/roadmaps/progress/startStart roadmap progress
GET/api/v1/analytics/summaryPlatform analytics summary
GET/api/v1/learning/coursesList available courses
GET/api/v1/roadmaps/gamification/profileUser gamification profile
GET/healthService health status

Engineering Practices

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Type Safety

  • Pydantic v2 models
  • TypeScript strict mode
  • SQLAlchemy 2.0 typing
  • OpenAPI auto-generation

Testing

  • pytest + fixtures
  • In-memory SQLite tests
  • Mock external services
  • Coverage reporting

DevOps

  • Docker Compose
  • GitHub Actions CI
  • Render auto-deploy
  • Health monitoring

Security

  • Firebase Auth
  • Environment secrets
  • Input validation
  • CodeQL scanning

Let's Build Something

Looking for roles where I can own complex systems end-to-end — from formal verification pipelines to production deployment at scale.

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