cAPTain. CaptainLeon445

`> whoami`

const LEON = {
  alias      : "cAPTain.dev",
  role       : ["Founder / Anchor @ Capleon International", "Senior Backend Engineer"],
  location   : "Lagos, Nigeria 🇳🇬",
  education  : "MSc. Information Technology — University of Lagos (In View)",
  building   : ["CirclePay", "Digit-Tally", "Giftseon", "Stacbase"],
  philosophy : "Building Tomorrow's Solution Today.",
};

I'm LEON — a builder who sits at the intersection of distributed systems, Nigerian fintech infrastructure, and product engineering.

At Capleon International Concept Limited (RC8737707), I lead a family of technology products spanning SaaS, Fintech, AI, Training, and Consultation. Professionals in the Capleon ecosystem are called Captains — the APT in Captain reflects exactly what we bring to the table.

🚀 What I'm Building

🔵 CirclePay

Savings & Payments Infrastructure

A 1M+ user-ready fintech platform with NGN/USDC dual-currency support. Built on an 8-engine synchronized treasury cluster — Contribution, Protected, Trust, and Intelligence Treasuries — using event sourcing, saga patterns, and a double-entry ledger.

NestJS · PostgreSQL · Redis · RabbitMQ · Paystack

🟢 Digit-Tally

Business Operations Platform

Production SaaS managing invoicing, subscriptions, and business workflows for SMBs. Runs on a hardened Docker Swarm cluster with RabbitMQ message broker, WhatsApp Flow integrations, and multi-service auth architecture.

NestJS · RabbitMQ · Docker Swarm · Resend · AWS S3

🎁 Giftseon

Social Commerce & Gift Economy

A full-stack gifting platform featuring Spray Money, multi-currency wallets, KYC/BVN verification, open banking via Mono, and a Gift Recommendation Engine. Microservices on DigitalOcean/Hetzner.

NestJS · React Native · Mono · Paystack · BullMQ

🟠 Stacbase

B2B All-in-One Business Ops

A business operations hub with Google Workspace OAuth, social media integrations, and unified API connectivity for Nigerian SMEs. Currently in active development.

NestJS · Google OAuth · X (Twitter) API · TypeScript

🛠️ Core Stack

Backend & APIs

Databases & Messaging

Infrastructure & DevOps

Nigerian Fintech Integrations

Frontend & Mobile

🧠 Engineering Principles I Ship By

📐  Event sourcing + Saga patterns for distributed consistency
🔒  Idempotency keys on every financial mutation
📊  Double-entry ledger as the ground truth for money movement
🏗️  Finite State Machines for lifecycle-driven domain models
🐇  RabbitMQ message contracts — typed, versioned, and never assumed
🔁  Graceful reconnect, DLX routing, and circuit breakers by default
🛡️  UFW + Docker hardening + SSH key-only access in production

📊 GitHub Stats

⏱️ Coding Activity

✍️ Recent Writing

I write about distributed systems, Nigerian fintech engineering, and the founder-engineer experience on Hashnode and LinkedIn.

💡 Follow me on Hashnode for deep dives into backend architecture, fintech infrastructure, and life as a Lagos-based founder-engineer.

🤝 Let's Connect

I'm always open to conversations around:

Fintech infrastructure — payments, reconciliation, double-entry ledger systems
Distributed systems at scale — event sourcing, saga orchestration, message brokers
Founder-engineering — building product companies from Lagos
Collaboration on open source or product ideas

"Building Tomorrow's Solution Today." — Capleon International Concept Limited

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