Liefermars is a Germany-based online food ordering and delivery platform connecting customers with multiple local restaurants through a single marketplace, similar to Foodpanda or Lieferando. Since the platform was already live and serving real customers, our work focused on stabilizing and enhancing an existing production system rather than building from scratch.
We resolved critical calculation errors in admin reporting and restaurant invoicing, fixed restaurant opening/closing hour logic, corrected order-time estimation, and shipped an automated invoice scheduling system — all deployed incrementally to production with zero disruption to live orders.
The Issue At Hand
Liefermars was already live and processing real orders when we joined, so every fix had to be surgical — reproducing bugs in a matched local environment, tracing root causes through a legacy PHP codebase, and validating fixes without risking downtime for active customers and restaurant partners.
The most business-critical issues centered on money: incorrect admin revenue and commission reports, broken restaurant invoice calculations, and no automated invoice scheduling — all fixed and hardened with regression testing before going live.
Corrected calculation errors in Admin Panel sales, revenue, and commission reporting.
Fixed broken restaurant invoice generation and added automated invoice scheduling.
Repaired restaurant opening/closing hour logic so orders were only accepted when a restaurant was actually open.
Rebuilt order-time estimation (ASAP, 30/45/50 min) to reflect real restaurant workload.
Our Collaboration
Phase 1
Discover
Phase 2
Diagnose
Phase 3
Rebuild
Phase 4
Deploy
Set up a local environment matching production and studied the existing custom PHP architecture to understand how ordering, invoicing, and admin reporting modules interconnected before touching any code.
Key Activities
Environment & Codebase Mapping
Configured a local environment matching production and mapped the custom PHP structure across customer, restaurant, and admin modules.
Bug Reproduction
Reproduced every client-reported issue in development to confirm root causes before writing a single fix.
Financial Logic Deep Dive
Traced the reporting and invoicing modules line by line to isolate exactly where calculation inconsistencies originated.
Delivered
Location-Based Restaurant Discovery
Customers drop their address and instantly see deliverable restaurants nearby, with a guided How-It-Works flow.
Smart Category Filtering
Filter restaurants by category, open status, free delivery, ratings, and minimum order in real time.
Restaurant Menu & Live Basket
Browse popular dishes and build an order with a persistent, real-time basket sidebar.
Guided Checkout Flow
A streamlined checkout covering delivery address, timing, payment method, and coupons with a transparent order summary.
Map-Based Delivery Radius
An interactive map plotting nearby restaurants within the customer's delivery zone.
Customer Address & Profile Management
Customers manage saved delivery addresses and personal profile details from a dedicated account area.
Gallery
Build with:
“
Fast and accurate, Recomended.
— Hamayoon R.
This project is part of our web development work. See what we can build for you.
