Aghahowa Osas
Full-Stack Engineer
Benin City, NigeriaI build things for the web and mobile from polished frontends to the APIs and databases running behind them. With 4+ years of hands-on work in TypeScript, Next.js, Node.js and Flutter, I've shipped products across fintech, e-commerce, logistics, and analytics — and I care about making them fast, maintainable, and actually pleasant to use.
What I Build
Web Application Development
Next.js · React · TypeScript · Tailwind CSS
- Full-stack web apps with Next.js & Node.js
- E-commerce, SaaS, and business portals
- API integration and third-party services
- Performance-optimised, SEO-ready builds
Mobile App Development
Flutter · Dart · iOS & Android
- Cross-platform apps for iOS and Android
- Fintech, logistics, and e-commerce apps
- Paystack & payment gateway integration
- Real-time features with WebSockets
Backend & API Development
Node.js · PostgreSQL · REST · Docker
- Scalable REST APIs and microservices
- PostgreSQL database design and Prisma ORM
- Authentication, RBAC, and secure systems
- Linux VPS deployment with CI/CD pipelines
Why Work With Me
- 4+ years building production systems
- Clients across Nigeria and globally
- Transparent Naira pricing — no surprises
- Fast turnaround, reply within 24 hours
Experience
Lead Software Engineer @ Gwenge (Contract)
Architecting a multi-vendor e-commerce & rental platform on AlmaLinux 9 with PM2 and CI/CD. Built secure merchant delivery verification with Paystack split payouts, handling 50+ vendors and 1,000+ products at 10k daily requests. Structured advanced RBAC tiers with Better Auth for admin, vendor, and courier modules.
Founding Member & Lead Developer @ Web Vitech
Establishing technical vision and engineering standards in an advisory capacity. Architected client portals and business-critical sites enforcing elite responsive design. Reduced code review bottlenecks from 2 days to under 4 hours via PR templates and automated linting.
Lead Developer @ Lumia Dev
Directing a 2-person engineering team delivering production Flutter apps and Next.js/Node.js web architectures. Accelerated delivery cycles by 20% via GitHub Actions CI/CD and 3 standardized boilerplates. Engineered a secure multi-vendor rental system with Paystack split payments — 150+ automated settlements at 100% success rate.
Flutter Developer @ Sky Health (Contract)
Built the Sky Health mobile app from scratch using Flutter — a health tracking and monitoring app that pairs with a wearable device over Bluetooth. Implemented real-time BLE device discovery, pairing, and continuous health data sync (heart rate, activity, sleep). Designed an intuitive dashboard for visualising trends and health insights.
Full-Stack Developer @ BizScan360 (Contract)
Optimized PostgreSQL/Prisma query infrastructure, reducing average API response latency by 44% (380ms → 210ms). Refactored legacy client-side code to Next.js SSR, pushing Lighthouse SEO scores from 72 to 95 and cutting initial page loads by 35%.
Freelance Full-Stack Developer @ Self-employed
Delivered end-to-end web and mobile solutions for small businesses and startups across Nigeria. Built landing pages, dashboards, and REST APIs using React, Node.js, and Flutter. Managed full project lifecycle — from scoping and design to deployment and client handoff.
Open Source Contributor & Junior Developer @ Various Projects
Contributed to open source repositories on GitHub — bug fixes, UI improvements, and feature additions across React and Node.js projects. Built personal projects to sharpen skills in TypeScript, REST API design, and cross-platform mobile development with Flutter.
Featured Projects
View all projectsLatest Writing
All articles
Frequently Asked Questions
Have a specific question? Submit your project requirements and I'll get back to you within 24 hours.