September 2025 – November 2025

JninaTech

A role-based progressive web app for running large-scale field operations: work sites, workforce, fleet, and inventory.

View Code

Tech stack

Next.js

TypeScript

NextUI

PWA

MongoDB

JninaTech - Field Operations PWA interface

TeamSaif Nemri

PublishedNovember 1, 2025

My Role

Full-stack developer. I built the Next.js PWA, the role-based dashboards, and the offline sync.

Overview

JninaTech is a role-based progressive web app for running large-scale field operations from one place. Managers track work sites, employees, vehicles, fuel costs, daily assignments, suppliers, stock, and orders. Each role (manager, supplier, worker) only sees the views relevant to them. Because field crews are not always on a stable connection, it is built as a PWA that works offline and syncs automatically once connectivity returns.

Features

Role-Based Dashboards - Separate views for managers, suppliers, and workers
Operations Tracking - Work sites, employees, vehicles, and fuel costs in one place
Supply Chain - Suppliers, stock levels, and order tracking
Offline-First - Works without internet using service workers, syncs in the background

Tech Stack

Frontend: Next.js with TypeScript and NextUI
Backend: NestJS with MongoDB
Offline: Service workers with background sync

What I Learned

The hard part was offline-first. I had to design caching strategies and handle sync conflicts when several people edit the same data offline, then reconcile everything cleanly once the connection comes back.

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