Developer Needed for USPS IMpb Barcode & Shipping Label Generation System

We are looking for an experienced developer who understands USPS shipping label technology to build a system that can generate USPS-compliant shipping labels with an Intelligent Mail package Barcode (IMpb).

The goal is to create a solution that can generate USPS labels similar to shipping platforms such as ShipStation, Stamps.com, or other shipping software.

Required Features:

Generate USPS-compliant shipping labels
Create and display USPS Intelligent Mail package Barcode (IMpb)
Support USPS tracking numbers
Generate GS1-128 (Code 128) barcode format
Print labels in PDF, PNG, or ZPL format
Include sender and recipient address information
Include USPS service information
Support label printing for thermal printers (Zebra preferred)
Store shipment records and tracking information

Developer Requirements:

The developer should have experience with:

USPS Shipping APIs
USPS IMpb specifications
GS1-128 / Code 128 barcode generation
Shipping software integrations
Label formatting
USPS tracking systems

Important:

The system must generate valid USPS labels that are accepted by USPS scanners. The developer should understand that IMpb barcodes require valid USPS-assigned tracking data and approved USPS integration methods.

Deliverables:

Working USPS label generation system
IMpb barcode generation
API integration or approved USPS data workflow
Label templates
Source code
Documentation for setup and future maintenance

Please include:

Previous experience with USPS, UPS, FedEx, or shipping API projects
Examples of similar work
Estimated timeline
$30-$50 for the project