ISP
Sanjog
সংযোগ
ISP billing, collections, and the MikroTik autopilot.
Live sandboxes · Independent product · corebari.net
Product workCoreBari
Twelve apps. One Postgres. Built to stay correct.
Multi-tenant business software for Bangladesh — POS, labs, ISP billing, clinics, coaching and more — sharing one database, one design system and one worker. Each demo opens a private sandbox that expires on its own. This is the product surface behind the case study on programmerzia.com.
- Applications
- 12
- Isolation
- Postgres RLS
- Stack
- Next.js · TypeScript
- Builder
- Ziaur Rahman
The suite
Ordered by scale — the same twelve apps as the rest of this host. Eleven have a live sandbox; Nirapod is covered in the case study.
Healthcare
Nirapod
নিরাপদ
Chamber queue, digital pad, patient record, and clinic billing together.
Case study
No public demo
Education
Batchly
ব্যাচলি
Coaching, school, and madrasah — one app, three demos: batches or campus classes, fees, attendance, exams, and the institution website.
Healthcare
LabDesk
ল্যাবডেস্ক
Sample to SMS report — diagnostics with the commission ledger built in.
Retail
POS
পিওএস
Ring a sale in ten seconds, with the baki khata built in.
Retail
Inventory
ইনভেন্টরি
Know what is in stock, across every location, in real time.
Travel
Safar
সফর
Hajj and Umrah agencies: pilgrim files, installments, documents, and groups.
Healthcare
Pharmacy
ফার্মেসি
Strip to piece, batch to expiry — the medicine counter, exact at last.
Retail
Hajira
হাজিরা
Shop staff attendance, payroll, and salary slips in minutes.
Commerce
Orderflow
অর্ডারফ্লো
Facebook orders on a board — status, courier, and COD in one place.
Finance
Dueflow
ডিউফ্লো
Send invoices, track payments, chase what you are owed.
Finance
AgentKhata
এজেন্ট খাতা
Mobile-money agent books — float, entries, day close, and baki on the counter.
Also on this host
Extra demos running here — outside the main suite.
Finance
BariBook
Flats, tenants, rent and dues — the whole bari on your phone.
Open demoAgriculture
Khamari
Farm batches — cost per batch, feed, sales and real margin.
Open demoHealthcare
Serial
Patients book a serial, watch the live queue, and arrive when it is nearly their turn.
Open demoFitness
Shakti
Gym memberships, renewals, PT packages, and front-desk check-in.
Open demoWhat holds the suite together
The interesting part is not the feature list — it is the shared spine: tenancy, money, offline, messaging and payments designed so the wrong version is hard to ship.
- Row-level tenancy Postgres RLS on a transaction-scoped setting — forget the wrapper and you read nothing.
-
Integer money
Poisha in
bigint. Balances as SUM over an append-only ledger. - Offline-first clients IndexedDB op queue with client-minted idempotency keys, sealed at rest.
- Shared platform One design system, SSO and entitlements across every app.
Talk — hire or ask.
Hiring managers: these demos are the product evidence behind CoreBari on my CV. Open a sandbox, read the case study, or get in touch.