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Allwell Onen

Frontend & Full-Stack Engineer

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6 years building production web applications entirely remote across Africa, the US, Europe, and Latin America. I specialize in real-time systems, full-stack SaaS architecture, and CMS-driven marketing platforms.

Currently building SmoothBook, a multi-tenant hotel channel management SaaS that eliminates double-bookings across OTAs using iCalendar sync and real-time availability tracking.


What I Build

Real-time systems - WebSocket architectures, live dashboards, concurrent user handling (2,000+ users), 60 FPS data interfaces

Full-stack SaaS - Multi-tenant PostgreSQL schemas, Next.js API routes, authentication systems, payment processing, iCalendar integrations

Data visualization - Chart.js + Recharts dashboards processing up to 10,000 data points, role-based analytics views

CMS-powered platforms - Expert Sanity and Storyblok implementations enabling non-technical teams to operate independently

AI-powered tools - Multi-provider AI pipelines via Vercel AI SDK (OpenAI, Anthropic, Google), automated content generation, job curation engines


Tech Stack

Frontend TypeScript React Next.js Vue.js Tailwind CSS GSAP

Backend & Database Node.js PostgreSQL Prisma Supabase GraphQL

CMS Sanity Storyblok

Tools Vercel Docker Jest


Featured Projects

Multi-tenant hotel channel management SaaS. Solves double-bookings across OTAs via iCalendar sync engine and API integration, multi-tenant PostgreSQL architecture, payment processing (Paystack for now), and embeddable booking widgets. Next.js TypeScript PostgreSQL Prisma Paystack iCalendar Better Auth

Full-stack expense tracker with Nigeria's 2026 Tax Reform Act compliance engine built from scratch — CIT/PIT/CGT calculations, Tesseract.js OCR receipt scanning, multi-currency support, FIRS-ready audit CSV exports, and PWA installability. Next.js 15 TypeScript Supabase PostgreSQL Tesseract.js Shadcn/ui Better Auth

AI-powered job content engine for X's Ads Revenue Sharing program. Multi-provider AI thread generation (OpenAI, Anthropic, Google), JSearch job pipeline with deduplication, Telegram bot notifications with deep links, and X API v2 automated posting. Next.js TypeScript Vercel AI SDK PostgreSQL Supabase Telegram Bot API X API v2


Currently

  • 🏗️ Building SmoothBook (multi-tenant hotel SaaS)
  • 💼 Software Engineer at Braudit (employee performance platform)
  • 🌍 Open to remote Front-End roles — Worldwide

Lagos, Nigeria (GMT+1) · Available for US East Coast overlap or full European hours

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