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bluebrain123

Samuel

@bluebrain123
4.0(1)

Senior Full Stack Developer NextJS React and NodeJS

Nigeria
About me
Senior fullstack engineer with 4+ years building scalable web apps using Next.js, React, and Node.js/Express. I specialize in: ✅ SaaS & marketplace platforms ✅ REST API & third-party integrations ✅ Payment systems (Stripe, Paystack, escrow) ✅ Auth & role-based access (Supabase, JWT) ✅ Clean, production-ready TypeScript code I've shipped real fintech and subscription platforms — not just demos, but products handling real users and real money. 📌 Message me before ordering to scope your project.... Read more

Skills

b
bluebrain123
Samuel
Offline • 
Average response time: 1 hour

See my services

Full Stack Web Applications
I will build a full functional website with database
4.0(1)
From$100 / projectMore details
Bug Fixes
I will fix bugs and errors in your next js or react app
From$20 / projectMore details

Portfolio

Work experience

Software_Engineering Daily

Full-Stack Software Engineer & Founder

Software Engineering Daily • Self-employed

Dec 2025 - Present • 10 mos

Architected and developed SplitPayNG, a Nigerian fintech marketplace that allows users to securely co-share premium digital subscriptions. Served as the lead full-stack developer, handling both frontend UI/UX and complex backend business logic. Key technical achievements include: • Engineered a secure 48-hour escrow payment system using Paystack webhooks, ensuring funds are conditionally held and released based on user verification. • Implemented client-side AES-256-GCM encryption to securely store and retrieve user credentials in a digital "Vault." • Built a highly responsive, modern dark-themed frontend using Next.js (App Router), TypeScript, and Tailwind CSS. • Designed scalable database architectures and implemented strict Row Level Security (RLS) using Supabase (PostgreSQL). • Automated user lifecycle events, including Cron Job billing reminders and failed payment handling via Resend email integrations. • Developed a comprehensive Admin dashboard to handle user disputes, escrow overrides, and platform fee calculations.

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