Browse categories
Explore
Fiverr Pro
English
$
USD
I will build custom app invoice invoice generator billing web appwithpayment automation
Erroy
About this gig
Need more than a basic invoic'e generator? I build custom invoice, invoic'ing & billing web apps designed around your actual business workflow, from invoic'e creation to payment collection, reconciliation & reporting.
I can develop a scalable invoic'e & billing system with custom invoic'e generation, PDF invoic'es, client/customer management, quotes & estimates, quote-to-invoic'e workflows, tax/discount logic, payment tracking, recurring invoic'es, automated reminders, customer portals, dashboards & financial reports.
My Services include:
- Invoice generator & invoic'e management system
- Accounting software
- Payment Apps, Digital Wallet app & Money Transfer Software
- Billing software, billing dashboard & customer portal
- Recurring billing, subscription billing & payment automation
- Invoice automation, workflows & notifications
- SaaS billing, multi-tenant systems & subscription management
- AI invoic'e processing, OCR & receipt/document extraction
- E-invoici'ng, VAT/GST, tax invoice's & PDF generation
Whether you need a small-business invoicin'g app, finance software, payment-enabled billing platform or SaaS product, Just Message me Today and I will help map the right solution!!
Get to know Erroy
Erroy
Building Fast, Scalable and User Friendly Mobile and Web Applications
- FromNigeria
- Member sinceJul 2026
- Avg. response time1 hour
Languages
English, Spanish, German, French
Hi, I'm Erroy Ellion, a Mobile & Full Stack App Developer focused on building high-performance mobile and web applications. I specialize in Flutter, React Native, Android, iOS, Firebase, APIs, and custom web solutions. From MVPs to enterprise apps, I deliver secure, scalable, and user-friendly products tailored to your business needs. My goal is to transform your ideas into reliable digital solutions with clean code, on-time delivery, and excellent communication.
FAQ
Can you build a custom invoice and billing system for my business?
Yes. I build custom invoice generators, Accounting Software, Accounting Apps & billing web apps around your workflow, including clients, products, taxes, PDF invoices, payment tracking, recurring billing, dashboards & reporting, so the system supports operations, not just invoice creation.
Can you also build payment apps, digital wallets or money transfer apps?
Yes. I can develop payment apps, digital wallets and money-transfer platforms with transaction flows, wallet balances, payment gateways, transfers, user accounts, transaction history, notifications and API integrations. Scope depends on the required financial architecture and integrations.
Can you integrate payments and accounting into the invoice app?
Yes. I can integrate Stripe, PayPal, Paystack, Flutterwave and other payment gateways, plus accounting/CRM APIs. Webhooks, transaction states and reconciliation logic can keep invoices, payments and customer records synchronized.
Can you build recurring and subscription billing for SaaS?
Absolutely. I can implement subscription plans, trials, recurring invoices, automated payment collection, renewals, upgrades, downgrades, cancellations and failed-payment recovery, creating a billing lifecycle that can scale with your SaaS revenue model.
Can you automate invoices, payments and business workflows?
Yes. I can automate invoice generation, payment reminders, receipts, notifications, reconciliation and reporting using APIs, webhooks, Zapier, Make, n8n or custom workflows. The goal is to reduce repetitive administration and improve payment visibility.
Can you add AI, OCR, inventory, CRM or accounting features?
Yes. The system can be extended with invoice/receipt OCR, AI document processing, inventory, expenses, CRM, accounting integrations, customer portals and analytics. I design these as connected workflows rather than isolated features, reducing duplicate data entry.
Why should I work with you?
I approach financial software as a connected business system, not just an invoice template. From invoicing and billing to payment apps, wallets and transfers, I consider transaction states, data integrity, APIs, security, automation and scalability to build practical financial products.
