OVERVIEW

A cloud platform that runs a school's entire operation, from one place: admissions, academics and grading, attendance, fees and accounting, timetabling, communication, and reporting. Each school is an isolated tenant with campus-level scoping on every record, plus role-based portals for admins, teachers, students, parents, librarians, finance supervisors, and external inspectors.

IMPACT

• →Multi-tenant, campus-scoped data model with authorization enforced at the database via Postgres Row-Level Security, not just application code
• →Server-side PDF pipelines with Puppeteer for report cards, certificates, ID cards, and receipts, driven by visual template designers
• →100+ REST resource groups spanning academics, finance, HR, scheduling, library, hostel, and external inspections

OVERVIEW

A subscription-billed platform that runs repair businesses and retail shops from a single multi-tenant codebase: point of sale, inventory, repair-ticket workflows, CRM, staff management, and billing. Each business gets a subdomain-scoped workspace; a superadmin console onboards tenants and applies industry-specific vertical templates that preconfigure catalogues, statuses, and pricing.

IMPACT

• →Money-handling flows (split tender, partial refunds, trade-ins, deposits) kept correct across every payment path via Postgres RPC functions
• →Configuration-driven module system lets each plan or tenant enable or hide entire feature areas without code branches
• →~215 versioned SQL migrations, with tenant isolation enforced at the database via RLS

OVERVIEW

A cloud platform running the full operations of a freight/delivery business from one multi-tenant codebase: booking, dispatch, live shipment tracking, quotations, invoicing, and customer management. Isolated workspaces per shipping company, an internal admin console over every tenant, and separate corporate and residential customer portals with a sales pipeline and loyalty points.

IMPACT

• →Permission-first architecture: every module gated by dynamic RBAC encoded into the JWT, so new features inherit access control
• →Shipment history built as an append-only event log enforced by database triggers, a tamper-proof delivery audit record
• →Portal access modeled as a computed consequence of the corporate sales-pipeline stage, removing a manual approve/reject workflow

OVERVIEW

A cloud personal-knowledge platform that replaces the scattered habit of saving things in WhatsApp self-chat, Drive, screenshots, and bookmarks with one place to capture, organize, link, search, remember, and share. Quick capture drops text and links into an inbox; items become notes, list entries, self-chat messages, calendar events, or contacts, each taggable, linkable, versioned, schedulable, and shareable through tracked links.

IMPACT

• →A linking layer and universal tag system every module inherits, so “connect anything to anything” works the same across notes, contacts, lists, and events
• →Tenant isolation enforced at the database with RLS and independently re-verified in the Express API middleware
• →Capture-to-organize built as a pipeline (quick capture, inbox triage, typed object, tagged/linked/collected/shared), with automatic version history and restore

OVERVIEW

A decision-support tool for HR that predicts which employees are at risk of leaving and, more importantly, why. An analyst fills in one employee's details or uploads a headcount CSV; the service returns a calibrated leaving probability, a keep/flag decision against a cost-tuned threshold, and a per-employee breakdown of which factors raised or lowered risk, plus what-if intervention scenarios. Deliberately scoped as a talk-to list, not a manage-out list.

IMPACT

• →Train/serve skew made a failing test, a 4-decimal parity assertion between the training notebook and the service, which caught three silent-degradation bugs
• →Every business decision (threshold, cost ratio, fitted medians, library versions) pushed into a persisted metadata.json, so the model re-tunes and redeploys without a code change
• →Decision threshold tuned from an explicit 10·FN + 1·FP cost function, turning a timid 0.38-recall classifier into an 0.85-recall talk-to list