</>WaapCoders
Mission-Critical Payment Core

FinTech & Banking Transaction Infrastructure

Architected for high concurrency and zero-loss financial integrity. We engineer bank-grade payment switches, AePS settlement engines, domestic money transfer portals, and instant UPI payout APIs built to scale across millions of daily transactions.

Consult FinTech ArchitectsAll Industries

Core FinTech Capabilities

  • AePS Switch: NPCI & UIDAI biometric cashout & balance check
  • DMT Remittance: Instant IMPS/NEFT penny-drop account validation
  • UPI Dynamic QR: Intent checkout & automated settlement
  • Double-Spend Shield: Redis distributed locks & immutable ledger
  • Security & PCI-DSS: AES-256 encryption & HMAC-SHA256
99.99%
Core Switch SLA Reliability
10M+
Daily API Transaction Requests
< 500ms
Average Payout Latency
0
Ledger Reconciliation Discrepancies
Bank-Grade Engineering

Mission-Critical Payment Infrastructure

Our architectures are engineered from the ground up for high transaction velocity, immutable ledgers, and zero reconciliation leakage.

AePS & Micro-ATM Cashout Engines

Aadhaar Enabled Payment System (AePS) switch connecting to NPCI via certified sponsor banks for biometric cash withdrawal, balance inquiry, and mini-statements.

Security & Deliverables
  • NPCI & UIDAI Biometric Compliant Core
  • Sub-500ms Two-Factor Biometric Verification
  • Automated Retailer Daily Settlement Ledger
  • RD Service Driver Integration (Mantra/Morpho)

Domestic Money Transfer (DMT Core)

Instant IMPS and NEFT remittances directly to any bank account in India with customer mobile verification, automated beneficiary lookup, and dynamic surcharges.

Security & Deliverables
  • Aadhaar/OTP Sender Registration & Verification
  • Instant Penny-Drop Account Name Verification
  • Multi-Bank Route Failover for IMPS
  • Real-Time Transaction Status Webhooks

UPI Dynamic QR & Payment Gateway Switches

Custom payment aggregators supporting UPI Intent, Dynamic QR generation, credit/debit cards, net banking, and automated merchant settlements.

Security & Deliverables
  • Sub-2s UPI Intent Checkout
  • Dynamic Intent QR Code Generation
  • Automated T+1 / T+0 Settlement Engine
  • Idempotent Webhook Callback Validation

Instant Disbursal & Bulk Payout APIs

Disburse vendor payments, gaming winnings, affiliate commissions, and loan disbursements 24/7 with zero human intervention and instant reversal protection.

Security & Deliverables
  • Batch Payout CSV Processing
  • Automated Wallet Balance Lock Mechanisms
  • Zero-Latency Real-Time IMPS Payouts
  • Granular Maker-Checker Approval Flows

Double-Spend Prevention & Ledger Accounting

Engineered with distributed Redis locks and strict database transactions to eliminate race conditions, double payouts, and reconciliation discrepancies.

Security & Deliverables
  • Redis Distributed Mutex Locks
  • Immutable Double-Entry Ledger Book
  • Automated Bank UTR Reconciliation Engine
  • Zero-Tolerance Ledger Balance Audit

Bank-Grade Cryptography & PCI-DSS

End-to-end payload encryption with AES-256-GCM, RSA key exchanges, HMAC signature validation, and compliance with RBI payment aggregator guidelines.

Security & Deliverables
  • AES-256 Payload Encryption
  • HMAC-SHA256 Webhook Signing
  • RBI Data Localization Compliance
  • OWASP Top 10 Security Hardening
Live Production FinTech Deployments

Securing Leading Indian Banking & Settlement Networks

WaapCoders architects high-throughput financial switches powering PayNidi Pro, KikPay Solutions, MagicPay Solution, LetsPay, and NeeliPay.

Bank sponsor integrations for ICICI, YES Bank, Fino, and IndusInd switches
Instant automated penny-drop verification & settlement callback verification
Automated chargeback defense & fraud anomaly detection triggers
Visit PayNidi Pro Visit MagicPay
FinTech Switch Architecture
High-Security
1. Concurrency & Locking Switch
Node.js, Go microservices, Redis Redlock distributed synchronization
2. High-Integrity Ledger Database
PostgreSQL with ACID transactions, row-level locking, automated snapshot backups
3. Bank API Gateways
Direct NPCI ISO 8583 message switch, NPCI 2.0 BBPS, UPI 2.0 Switch
4. Security & Cryptography
RSA 2048-bit digital certificates, AES-GCM, TLS 1.3, HSM Hardware Support

FinTech & Banking Infrastructure FAQs

Technical queries on switch latency, bank integrations, and regulatory compliance.

How do you protect payment systems from double debits and race condition bugs?

We utilize distributed Redlock algorithms on Redis clusters alongside PostgreSQL row-level isolation. Each transaction is stamped with an immutable UUID idempotency key, mathematically guaranteeing that a balance deduction or payout cannot execute twice.

Do you assist with sponsor bank compliance and NPCI testing?

Yes. Our engineering team has conducted dozens of successful integrations with ICICI, YES Bank, Fino Payments Bank, and IndusInd Bank, guiding your team through end-to-end UAT and certification testing.

Can we connect multiple payout accounts for load balancing and redundancy?

Yes. Our routing switch supports multi-bank cascade rules. If Bank A returns a timeout or low balance threshold, transactions cascade automatically to Bank B with zero client-side latency.

Related services, case studies & articles

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