About the Client
The client wanted to create an advanced online invoicing system that automates billing and payment workflows. Their goal was to eliminate complex accounting tools and deliver an easy-to-use, integrated solution for freelancers, SMBs, and enterprises.
Project Type
A full-cycle web and mobile app development engagement that involved UI/UX design, code optimization, payment integration, time tracking, and expense management. The objective was to build a scalable, fast, and secure e-invoicing system.
Key Challenges & Their Impact
| Challenge |
Impact |
| Complicated invoice creation and management |
Delays in billing and payments |
| Need for expensive accounting software |
High operational costs |
| Lack of real-time payment tracking |
Reduced transparency for users |
| Multi-platform optimization |
Performance inconsistency across web and mobile |
Our Solutions
| Challenge |
Our Approach |
Result |
| Complicated invoice creation |
Built intuitive templates for easy invoice generation |
70% faster billing process |
| Expensive accounting systems |
Developed a complete in-house invoicing platform |
Eliminated third-party tool dependency |
| Lack of payment visibility |
Added real-time payment tracking and alerts |
Improved transparency and client satisfaction |
| Multi-platform optimization |
Optimized app for Android, iOS, and web |
3× better performance and stability |
Technology Stack
- Mobile Development: Android SDK/NDK, Objective-C, Swift
- Web & Cloud: PHP, LAMP, Azure Web, Memcached Redis
- Database & APIs: SQLite.NET, JSON Parsing, XML Parsing
- UI & Optimization: Core Java, CSS, JavaScript, Code Security, Page Load Time Optimization
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Development Process
Discovery Phase
- Conducted business research and competitor analysis
- Defined project scope and required integrations
Execution Phase
- Designed modern UI and developed backend workflows
- Followed agile methodology with regular milestone reviews
Sprint-Based Delivery
- Collected client feedback at each sprint
- Applied refinements to improve speed and accuracy
Deployment & Optimization
- Deployed web and mobile versions on live environments
- Optimized performance, security, and scalability
Salient Features
- Interactive dashboard for invoices, expenses, and projects
- Time tracking and task management modules
- Recurring invoice and estimate generation
- Payment status tracking and automated alerts
- Product catalog with unit pricing and descriptions
Results & Business Impact
| Metric |
Before |
After |
Improvement |
| Invoice Processing Time |
Manual |
Automated |
70% faster billing |
| Billing Errors |
Frequent |
Minimal |
80% reduction |
| Platform Accessibility |
Limited |
Web + Mobile |
100% accessibility |
| Expense Tracking |
Manual |
Automated |
Real-time accuracy |
| Operational Cost |
High |
Reduced |
45% lower overhead |
Additional Gains
- Increased billing accuracy and reduced manual errors
- Enhanced productivity for businesses of all sizes
- Centralized dashboard for real-time insights
- Secure cloud access for remote teams
- Scalable architecture supporting 10K+ users simultaneously
Why PixelCrayons
| Our Expertise |
What It Delivered |
| Custom SaaS Development |
End-to-end online invoicing platform |
| Secure Code Architecture |
Safe, compliant, and reliable system |
| Multi-Platform Support |
Seamless web and mobile experience |
| Real-Time Insights |
Instant payment and expense tracking |
| Agile Delivery Model |
On-time releases and continuous optimization |
Client Testimonial
“PixelCrayons developed Invoicera, which revolutionized our invoicing process. The platform’s speed, accuracy, and design helped us scale efficiently across clients and regions.”
— Product Director, Invoicera
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