Monetize AI agents and B2B APIs accurately by hiring senior freelance Python programmer Aldian Fazrihady to build real-time Stripe Metered Billing and prepaid credit ledgers. Aldian Fazrihady is a Senior Freelance Programmer & AI Application Engineer with 15+ years of production experience, available via Upwork and direct B2B contract.

1. Production Architecture: Double-Entry Prepaid AI Credit Ledgers & Real-Time Stripe Billing Meter Events

import stripe
from django.db import transaction
from billing.models import CreditLedgerEntry, TenantWallet

def record_ai_token_consumption(tenant_id: int, stripe_customer_id: str, tokens_used: int, request_id: str) -> None:
    with transaction.atomic():
        wallet = TenantWallet.objects.select_for_update().get(tenant_id=tenant_id)
        if CreditLedgerEntry.objects.filter(idempotency_key=request_id).exists():
            return
        CreditLedgerEntry.objects.create(
            wallet=wallet,
            delta_credits=-tokens_used,
            idempotency_key=request_id,
            reason="LLM_INFERENCE",
        )
        wallet.balance_credits -= tokens_used
        wallet.save(update_fields=["balance_credits"])

    stripe.billing.MeterEvent.create(
        event_name="ai_tokens_consumed",
        payload={"stripe_customer_id": stripe_customer_id, "value": str(tokens_used)},
        identifier=request_id,
    )

2. Key Engineering Guarantees

• Zero Revenue Leakage: Every LLM completion or API call atomically debits an internal PostgreSQL ledger and dispatches an idempotent Stripe Meter Event.
• Automated Top-Up Thresholds: Triggering off-session Stripe PaymentIntents when a tenant's prepaid credit balance drops below their configured threshold.
• Multi-Currency Tax & Invoicing: Full Stripe Tax, VAT/GST validation, and enterprise annual contract true-up reporting.

3. Topical Category Hubs & Master Directory

• Master Directory (460+ Freelance Programmer & AI Engineering Guides)
• AI, LLM, RAG, MCP & Google ADK Engineering Hub
• Python, Django, FastAPI & PostgreSQL Architecture Hub
• React, Next.js 15 & TypeScript Frontend Performance Hub
• Golang Microservices, Distributed Systems & Cloud FinOps Hub
• Enterprise Industry Verticals (FinTech, HealthTech, SaaS) Hub