We build custom web platforms & apps that grow your business.
High-converting storefronts, interactive learning portals, SaaS web tools, and mobile applications. Engineered for sub-second speed, stunning design, and zero downtime.
Sub-Second Page Load Speed
Full-spectrum software engineering. Tailored to your needs.
// Strict engineering standards, clean modular architecture, zero technical debt.
Mobile App Engineering
Custom iOS and Android mobile applications built with React Native. Native performance, responsive design, offline capabilities, and smooth 60fps animations.
Full-Stack Web Engineering
Modern, high-performance web applications, storefronts, dashboards, and portals. Designed for instant loading, security, and customer conversion.
Backend & API Architecture
Reliable Node.js and Python API services, auth systems, database modeling, and server architecture engineered for high availability and security.
Fintech & Payment Solutions
Secure digital payment integrations, double-entry wallet architectures, transaction tracking, and compliance-aware user flows built with extreme reliability.
Third-Party Integrations
Seamless integration of analytics engines, authentication providers, payment processors, and external third-party APIs into your product stack.
MVP & Product Prototyping
Turn your product vision into a production-ready MVP quickly. Engineered for startup founders and companies who need to launch fast.
Tools chosen for durability. Not hype.
Every framework and library in our stack is selected for performance, maintainability, and real-world stability.
Frontend & Web
We build modern, accessible, and fast web user interfaces using Next.js 16 and React 19.
Craftsmanship first. No shortcuts.
Since 2023, our engineering leadership has developed mission-critical financial systems at Mabilla Group, serving as Full-Stack Engineer. This work includes sovereign payment platforms for the Nigeria High Commission UK, Open Banking payment ecosystems for Celergate, and multi-tenant remittance platforms including the Remglo Payceler Agent mobile application.
Alongside enterprise fintech engineering, Gran Jefe designs, builds, and deploys high-converting web applications, mobile platforms built with React Native and Expo, and bespoke digital software for businesses and founders.
We partner with founders, businesses, and engineering leaders who need custom software built right the first time, prioritizing clean component architecture, modern user experience, and long-term maintainability.
Engineering Showcase. Interactive Workstation.
Nigeria High Commission Payment Platform
Official digital payment collection portal for administrative and consular charges for the Nigeria High Commission United Kingdom. Engineered full-stack architecture featuring consular service cart, fast secure Open Banking settlement processed in minutes, and automated receipt generation. Engineered for Mabilla Group, where I currently work as a Full-Stack Engineer.
Ready to construct your next web platform or production infrastructure?
Engineering Curriculums & Learning Hub
Curated, project-first learning paths developed by Gran Jefe. Bridging the gap between tutorial theory and production-grade architectures. Free for all learners.
Python & Django Backend Engineering
From Client-Side Concepts to Full Enterprise Systems
The battle-tested transition path for frontend engineers moving into backend architecture with Python 3.12, Django 5.x, Django REST Framework, PostgreSQL, and Celery.
What You Will Build & Master
- Django ORM & safe migrations with zero raw SQL leaks
- DRF ModelSerializers, ViewSets & Swagger documentation
- SimpleJWT token auth with HTTP-only cookie security
- PostgreSQL production tuning & Celery background jobs
Fintech Engineering & Payment Architecture
Ledgers, Idempotency, Webhooks & Regulatory Security
The engineering principles behind multi-billion financial systems: immutable double-entry ledgers, idempotency keys, HMAC-SHA512 webhooks, and automated bank reconciliation.
What You Will Build & Master
- Double-entry bookkeeping math (never store float money)
- HMAC-SHA512 payment webhook verification pipelines
- Redis distributed idempotency locks against double charges
- Automated daily bank settlement reconciliation scripts
Mobile Engineering with React Native & Expo
Cross-Platform iOS & Android Apps from Web Concepts
Transition your React & TypeScript instincts to native mobile apps using Expo Router, NativeWind, Biometric Keychain security, and EAS App Store deployments.
What You Will Build & Master
- Expo Router v4 file-based stacks, tabs & native modals
- Biometric authentication with FaceID & Hardware Keystore
- High-speed FlashList virtualization without frame drops
- Offline state sync with MMKV & App Store cloud builds
AI Systems & LLM Application Engineering
RAG Pipelines, Tool Calling & Autonomous Multi-Agents
Engineer reliable AI software: structured outputs with Pydantic, hybrid vector search with pgvector, document chunking, and multi-agent coordination frameworks.
What You Will Build & Master
- Deterministic structured JSON completions with Zod/Pydantic
- Hybrid full-text & vector similarity search with pgvector
- Document chunking, embedding generation & cross-encoders
- Autonomous multi-agent workflows with state graphs & memory
Full-Stack Web Development Curriculum
End-to-End Modern Engineering for Adult Learners
A structured, project-based engineering roadmap tailored for adult learners. Covers terminal fluency, HTML/CSS, React, TypeScript, Node.js, Prisma, and Dockerized DevOps.
What You Will Build & Master
- The 70/30 engineering rule: 70% building, 30% theory
- TypeScript, React 19, Vite & TanStack Query client state
- Node.js REST API with Prisma ORM & ACID transactions
- DevOps pipeline with Vitest, Playwright & GitHub Actions
Modern Frontend Engineering Curriculum
Sub-Second Speed, Component Architecture & Next.js 16
Deep-dive into advanced frontend architecture: React 19 hooks, Next.js 16 App Router, Server Components, Core Web Vitals optimization, and design system engineering.
What You Will Build & Master
- Mastering JS event loop microtasks & TypeScript generics
- React 19 Server Actions, useOptimistic & Zustand UI state
- Next.js 16 Streaming SSR, App Router & SEO meta tags
- Sub-800ms LCP, 0 CLS, and Radix UI accessible components
Let's talk about your project.
Have an idea, need a custom software solution, or want to discuss technical architecture? Reach out to start a conversation.