Justina Ominisan.Frontend & AI engineer.
I build web applications and AI-powered products — dashboards, RAG systems and real-time LLM interfaces. AWS Certified.
Selected work
Production frontends and AI systems built at Datamellon. Open any project for the full case study.
- React
- TypeScript
- API development
- E2E testing
- AWS
KYC, Administration & AI Platform
Redesigned complex compliance dashboards, shipped AI Studio across 12 dashboards, and added automated E2E coverage to critical KYC workflows.
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- FastAPI
- Python
- AWS Bedrock
- Amazon Nova Pro
- Vector + BM25
- Pillow
SOP → Automated Journey Map Generator
An AI proof of concept that turns SOP documents into branded, production-ready journey maps — document parsing, retrieval, LLM reasoning and image rendering in one workflow.
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- React
- Next.js
- TypeScript
- Data viz
Analytics & Timeline Dashboards
Analytics dashboard UI including a Gantt-style timeline, turning raw API data into something stakeholders can read at a glance.
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- React
- TypeScript
- Server-Sent Events
- RAG
- AWS Amplify
RAG & Real-Time LLM Platform
Client-side SSE integration for a RAG platform — responses render progressively as they stream. Also debugged and restored it in production behind CloudFront.
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Things I've shipped
Client builds and personal projects. All live.
Pharmaceutical marketplace
A procurement network connecting licensed healthcare providers with verified pharmaceutical suppliers.
Source
AI assistant for the job hunt
Track applications, analyse resumes, generate cover letters and prepare for interviews in one place.
Source
Gamified exam prep
Study modes that let students learn smarter and compete with friends.
Source
Ride-sharing platform
Full-stack ride sharing with authentication, real-time messaging, Google Maps and ride matching.
Source
E-commerce storefront
Dynamic cart with advanced filtering, wishlist and a seamless checkout.
Source
Menswear store
Cart and checkout, payment integration, live chat and authentication for a clothing and accessory store.
Online storefront
Shopping cart with filtering, wishlist and checkout on WooCommerce.
Source
Soil & crop assessment tool
A lightweight, interactive tool for quick agricultural assessment.
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Movie reviews app
Browse reviews and ratings for the latest movies.
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Media agency website
Built from the ground up with JavaScript toggle effects, CSS animations and an image slider.
Source
Stack
What I build with, from the interface down to the services behind it.
- React
- Next.js
- TypeScript
- JavaScript
- Tailwind CSS
- CSS / SCSS
- React Query
- Redux
- Node.js
- Express
- FastAPI
- REST APIs
- Server-Sent Events
- MongoDB
- AWS Bedrock
- Amazon Nova Pro
- RAG
- LLM integrations
- Knowledge Bases
- Hybrid search
- AWS
- AWS Amplify
- CloudFront
- Vercel
- Render
AWS Certified AI Practitioner
Amazon Web Services
Meta Front-End Developer
Meta
Programming with JavaScript
Meta
Version Control
Meta
I'm Justina, a frontend engineer working on AI products.
I build the interfaces people actually use — and increasingly the APIs and AI systems behind them. Lately that's meant AI Studio across a dozen dashboards, a retrieval pipeline for a bank, and getting LLM streaming to behave in production.
- AWS Certified AI Practitioner
- 4 years shipping production frontends
- Frontend, APIs & AI systems
Let's build something useful.
I am always interested in new opportunities and challenging projects. Whether you need a responsive website, a complex web application, or just want to discuss your ideas, I would love to hear from you.