GharTak (گھر تک)
Two-Sided Hyperlocal On-Demand Delivery & Pharmacy Marketplace
How RafayLabs re-engineered a localized pharmacy ordering platform into a decentralized, real-time two-sided marketplace powered by multimodal requests (voice notes & handwritten slips) and sub-second socket negotiation.
DUAL-ROLE ENGINE
Customer and Business (Pharmacy) portals unified in 1 clean Expo mobile app with zero separate desktop requirements.
3-WAY MULTIMODAL
Instant order requests via native audio voice notes, handwritten prescription photos, or freeform text items.
<1.2s SOCKET LATENCY
Real-time state updates powered by Socket.IO and Neon Serverless Postgres for sub-second quote delivery.
ZERO-STOCK OVERHEAD
Local pharmacies manage inventory & delivery directly; platform operates as high-margin B2B SaaS.
The Strategic Pivot
Moving from central fleet dispatch to a decentralized marketplace unlocked exponential scale.
The Legacy Local Delivery Bottleneck
Originally, GharTak operated as a single pharmacy delivery service where the founder employed dedicated riders and maintained a centralized catalog. This created severe operational friction:
- •Rider Management Overhead: Solo fleet coordination, absenteeism, and manual dispatching became recurring non-technical bottlenecks.
- •Heavy Central Catalog Maintenance: Manually synchronizing inventory, dosage variations, and daily price fluctuations across hundreds of pharmaceutical SKUs.
- •Geographic Confinement: Delivery boundaries were constrained strictly to where internal riders were physically stationed.
The Decentralized Two-Sided Platform
GharTak was architected into a pure digital marketplace. The platform connects consumers directly with local pharmacies, shifting fulfillment responsibility to the merchant:
- •Store-Led Last-Mile Delivery: Pharmacies fulfill orders using their existing counter delivery staff, eliminating platform fleet liabilities.
- •Freeform Request-to-Quote Engine: Businesses quote prices and discounts on demand without needing to catalog thousands of items upfront.
- •Clean B2B SaaS Recurring Revenue: Pharmacies pay a predictable monthly subscription; transactions and cash-on-delivery remain friction-free.
Core Innovations
Overcoming literacy and typing barriers in emerging markets through multimodal intake.
Voice Note Ordering
Customers record an Urdu or English audio clip describing their medicine needs or symptoms. The audio is uploaded directly to Firebase Storage CDN and delivered to the pharmacist in sub-second latency.
Prescription Parchi Vision
Users snap a photograph of a doctor's handwritten prescription slip ("Parchi") or paper list. The pharmacist reviews the high-resolution image directly in the business app interface to prepare accurate doses.
Dynamic Quoting Engine
Instead of forcing stores into rigid catalog pickers, pharmacists enter freeform item names, quantities, prices, and per-item discounts. The customer receives a clear, transparent quote to accept or decline.
A single PostgreSQL entity governs the entire order lifecycle with zero duplicate tables or race conditions. Socket.IO broadcasts status events instantly to both customer and merchant clients:
Architectural DNA
If We Can Architect GharTak, Here Is What We Can Build For Your Startup.
Engineering an on-demand marketplace or logistics platform from scratch typically takes 6 to 9 months of painful architectural trial and error. Because RafayLabs solved the foundational complexities in GharTak—two-sided role switching, sub-second socket negotiation, GPS pinning, and state machines—we can adapt this battle-tested engine to ship your next product in weeks, not quarters.
RIDE-HAILING & CARPOOLING APPS
Passenger creates a ride request with origin & destination GPS pins. Nearby drivers receive the request, submit bids/fares, and passenger confirms. The state machine transitions in real time from Bid Accepted to Driver Arrived to En Route.
ON-DEMAND COURIER & PARCEL DISPATCH
Sender takes a photo of the parcel, specifies dimensions/weight, and sets pickup and dropoff coordinates. Local couriers quote pricing based on distance and vehicle type, with photographic proof of delivery upon dropoff.
ON-DEMAND HOME SERVICES & HANDYMAN
Homeowner records a voice note or snaps a picture of an AC leak, plumbing issue, or electrical fault. Verified local technicians review the request, assemble a custom line-item quote with parts & labor, and confirm the visit.
HYPERLOCAL DARK STORES & DIRECT COMMERCE
Neighborhood merchants and mini-fulfillment centers receive instant consumer order requests. Stores accept and assemble orders rapidly, bypassing heavy centralized stock reconciliations with a lightweight monthly SaaS subscription.
Have a unique on-demand workflow in mind?
Whether you need driver bidding, service dispatching, or multimodal orders, we already own the building blocks.
Production Tech Stack
Engineered for high throughput, sub-second event synchronization, and zero server management overhead.
01 // FRONTEND
Expo SDK 54, Redux Toolkit, RTK Query cache invalidation, Native Audio Recording, and Bilingual RTL localization.
02 // BACKEND
Modular architecture with dedicated Order-Requests gateway, JWT role-based auth guards, and real-time state broadcasts.
03 // DATA LAYER
Serverless PostgreSQL with instant DB branching, paired with Firebase Storage CDN for audio and prescription image assets.
04 // GEOLOCATION
Reverse geocoding for informal delivery addresses, interactive GPS pin dropping, and radius-based pharmacy filtering.
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