Multi-Tenant Coworking ERP & Automated GST Billing Engine

Coworking operators manage multiple physical facilities with distinct GST tax registrations, cabin layout blueprints, pricing structures, and localized staff access.

Engineered an Organization ➔ Branch ➔ Cabin ➔ Seat ➔ Contract hierarchy with dynamic route isolation (/[orgId]/[branchId]/[module]) ensuring branch managers only access their localized data.

High-volume leads arriving from Meta Ads, Google Ads, website forms, and walk-ins were tracked on spreadsheets without clear assignment, causing lead leakage.

Built native .xlsx/.csv bulk ingestion with automatic deduplication, rule-based round-robin sales executive assignment, and chronological activity logging with callback schedules.

Sales representatives spent hours manually drafting proposals with varying seat prices, deposit calculations, and discount rules, delaying deal closures.

Implemented a dynamic quotation builder computing seat counts, cabin tiers, amenities, and security deposits, generating instant PDF quotes with 1-click conversion to lease contracts.

Physical agreement printing, stamping, courier delays, and legal archive overhead took 2 to 3 days per client onboarding.

Automated PDF agreement generation using Puppeteer & PDFKit with dynamic token replacement, cryptographic verification QR codes, Sharp-optimized company seal overlays, and automatic SharePoint sync.

Concurrent inquiries for the same private cabin caused accidental double-booking and inaccurate branch vacancy reporting.

Developed a real-time seat inventory state machine with atomic MongoDB reservation locks. Displays live 71.9% occupancy metrics (146 occupied, 57 vacant out of 203 total seats).

Complex Indian tax compliance requires 18% GST (CGST 9% + SGST 9%) on standard corporate clients, while exempt entities require zero tax, leading to monthly calculation chaos.

Architected a dual-stream revenue engine separating GST-applicable contracts (₹16.33L + 18% GST = ₹19.27L) from exempt contracts (₹1.85L) to compute ₹21.12L MRR with zero floating-point drift.

Community managers spent hours answering repetitive requests for tax invoice PDFs, Wi-Fi credentials, visitor passes, and payment receipts.

Created a dedicated client-authenticated resident portal for downloading past tax invoices, viewing active seat allocations, reviewing lease expiry terms, and submitting support tickets.

Resident complaints regarding air conditioning, internet connectivity, or housekeeping were handled over WhatsApp, resulting in lost accountability.

Engineered an internal helpdesk module with categories (IT, Maintenance, Housekeeping), SLA countdowns, priority levels (Low, Medium, Critical), and resolution audit logs.

Unmonitored facility operating expenses (electricity, fiber bandwidth, housekeeping, repairs) obscured true net profit margins across physical branches.

Implemented a comprehensive expense tracker categorizing operational overhead, directly juxtaposing invoiced revenue against branch expenses to yield net operating margins.

Leases ended without sufficient advance notice, resulting in vacant cabins and lost revenue before sales teams could negotiate renewals.

Engineered an automated 'Leaving Soon' early warning engine that surfaces expiring contracts (e.g. 19-day countdowns) with cabin details and revenue impact to trigger proactive renewal drives.

Manual deployments and configuration drift caused server downtime during working hours when branch managers were actively generating invoices.

Built multi-stage Dockerized containers orchestrating Node.js and Next.js, with automated Jenkins CI pipelines running build checks, health-check polling, and Coolify zero-downtime swaps.