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Sammy Billion

@sammybillion

Lead Fullstack Engineer at Richtec Engineering who engineered production-ready AI SaaS platforms and automated secure subscription billing.

Nigeria

Message

At Richtec Engineering, I engineered and delivered production-ready AI SaaS platforms end-to-end. I built secure Lemon Squeezy and Stripe webhook workflows for recurring subscriptions, and implemented localized UX strategies that boosted global user engagement by 25%.

I also hardened cross-border transactions with HMAC verification and UTC-aligned timestamps, and refactored Mongoose queries to cut microservices server response latency by 40%. Earlier, at Tech Core Solutions, I developed client-facing MERN web portals that improved operational workflows by 15%.

Experience

Work history, roles, and key accomplishments

Current

Lead Fullstack Engineer & Consultant

Current

Richtec Engineering

Jul 2021 - Present (5 years 3 months)

Engineered and delivered production-ready AI SaaS platforms end-to-end, coordinating with product and marketing to boost global engagement by 25%. Built automated subscription workflows and security hardening measures, cutting server response latency by 40%.

React TypeScript NodeJS ExpressJS MongoDB Mongoose LemonSqueezy Stripe HMAC GitHub Actions Vercel Render Docker Tailwind Redux toolkit

Fullstack Web Developer

Tech Core Solutions

Jan 2019 - Jun 2021 (2 years 5 months)

Developed and maintained scalable client-facing web portals using the MERN stack, improving client operational workflows by 15%. Collaborated in agile sprints to design high-conversion user components and integrated secure RESTful APIs.

MongoDB ExpressJS React NodeJS Tailwind REST APIs Agile

Education

Degrees, certifications, and relevant coursework

Schoolville Academy

Advanced Certification, Fullstack Web Development

Advanced Certification in Fullstack Web Development with specialization in MERN Stack Architecture, Cloud Infrastructure, and Distributed Environments.