Currently available for opportunities

Cortex Systems

Senior Fullstack Developer / Product Engineer

Intelligent Experiences. Secure Infrastructure.
Building high-velocity, constraint-driven digital products with a focus on architectural pragmatism.

VIEW_PROJECTSRÉSUMÉ ↗

Tap 'Ask Cortex' below to explore projects, articles, and architecture insights.

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01. How I Build

Solving Real Problems First

I focus on building features that create real value for users and businesses. Whether working within tight deadlines, budgets, or technical constraints, I aim to deliver practical solutions before adding unnecessary complexity.

Choosing the Right Tools

I prefer tools and technologies that are reliable, maintainable, and fit the problem well. I enjoy exploring modern technologies, but I believe simplicity and long-term maintainability matter just as much as innovation.

Building for Growth

I like building applications in a modular way so features can evolve over time without needing major rewrites. My goal is to balance fast delivery with clean foundations that are easy to improve later.

Improving Through Real Usage

I pay close attention to how applications behave after deployment — fixing issues, improving performance, refining user experience, and learning from real-world usage to make products better over time.

02. Core Competencies

The languages, frameworks, and infrastructure I use to build scalable products.

🖥️ Frontend

React.jsNext.jsTypeScriptTailwind CSSFramer MotionHTML5/CSS3

⚙️ Backend

Node.jsExpress.jsREST APIsServer ActionsJWT Auth

🗄️ Database & Tools

MongoDBPostgreSQLSupabaseFirebaseGit/GitHubVercelRender

03. Featured Projects & Systems

Production-grade fullstack applications I’ve built and maintained.

🟢 Live in Production

CortexFit

Next.js 14 • Supabase • Stripe

Live Application ↗

❯ The Problem & Value

A multi-tenant SaaS platform built specifically for premium gym management. It streamlines member billing, scheduling, and facility access control into one highly performant dashboard for gym owners.

❯ Architecture Flow & Impact

💻

Next.js Client

⚙️

Server Actions

☁️

Supabase Auth & DB

Lessons Learned: Architected a complex multi-tenant B2B data model utilizing Row Level Security (RLS) in Supabase. Built resilient webhook processing pipelines to handle Stripe subscription events with 100% accuracy, ensuring smooth tenant onboarding and automated access provisioning.

🟢 Maintained

Smart School Management System

React • Node.js • MongoDB

View Code ↗Live Demo ↗

❯ The Problem & Value

A full-stack MERN platform designed for modern African educational institutions. It delivers a premium, mobile-first experience bridging administration, educators, students, and parents into a single cohesive ecosystem.

❯ Architecture Flow & Impact

💻

React Client

⚙️

Node.js API

☁️

MongoDB Atlas

Lessons Learned: Architected a scalable multi-role authentication system using JWT and Context API. Implementing dynamic role-based route protection allowed for secure, isolated dashboards for Admins, Teachers, Students, and Parents while maintaining a shared reusable component architecture. Integrated an AI-assistant for educational tools and Recharts for administrative analytics.

🟢 Maintained

ImpactConnect

React • Node.js • MongoDB

View Code ↗Live Demo ↗

❯ The Problem & Value

A modern full-stack NGO management platform built for organizations to manage projects, receive donations, and publish impact stories through a scalable, production-ready experience.

❯ Architecture Flow & Impact

💻

React Client

⚙️

Express API

☁️

MongoDB Atlas

Lessons Learned: Integrated secure Paystack donations and role-based JWT access. Building a decoupled architecture allowed for independent scaling of the frontend on Vercel and the backend API on Render.

04. Performance & Reliability

Lighthouse Baseline LIVE

100

Perf

100

A11y

100

SEO

Built with strong focus on performance, accessibility, and modern web standards.

Reliability

99.98%

Consistently monitored deployments with reliable uptime and smooth user experience across devices.

Security Practices

✓ Strict Content Security Policies (CSP)
✓ Input validation using Zod schemas
✓ API rate limiting to reduce spam and abuse

05. Fullstack Insights

View Archive ↗

Software Architecture4 min read

Constraint-Driven Design: Why Limits Make You a Better Product Engineer

Infinite scale is a myth that kills early-stage velocity. Here is why embracing constraints, architectural pragmatism, and boring tech leads to better, faster software.

Architecture4 min

Architecting a Multi-Tenant SaaS: Lessons Learned from Building CortexFit

A technical deep-dive into how I architected CortexFit, a multi-tenant SaaS platform, using Next.js 14, Supabase Row Level Security, and Stripe webhooks.

06. Peer Recommendations

What It’s Like To Work With Me

Feedback from product managers and lead engineers I've collaborated with to build production systems.

"Gbemisola is that rare fullstack developer who actually understands product and user experience. She doesn't just blindly write code; she questions the constraints, optimize the architecture, and always deliver a polished, scalable application."

Product Manager

Former Colleague

"Working on the backend while Gbemisola handled the frontend architecture was incredibly smooth. She understands API design, data flow, and how to build resilient UIs that gracefully handle network latency. A massive asset to any engineering team."

Lead Engineer

Co-collaborator

07. Let’s Work Together

Get In Touch

Whether you’re building a new product, improving an existing platform, or looking for a reliable fullstack developer, I’d love to hear about your project and explore how we can work together.

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