Building high-volume payment routers, digital gift card platforms, loyalty point exchanges, and closed-loop user wallets requires uncompromising engineering discipline. A race condition in a concurrent balance check or a missing idempotency key on a payment gateway retry can cause immediate financial loss and regulatory non-compliance.
If you want to hire a freelance PCI-DSS payment gateway and closed-loop wallet programmer in Go (Golang), I am Aldian Fazrihady—a senior backend architect experienced in integrating CyberSource, HyperPay, Stripe, and multi-currency double-entry ledgers.
Financial & Payment Systems Engineering in Go
1. Polymorphic Payment Gateway Adapters (Stripe, CyberSource, HyperPay)
I design clean hexagonal Go interfaces (Polymorphic Payments in Go) that unify pre-authorizations, captures, voids, 3DS2 challenges, and webhooks across global and MENA regional payment processors.
2. Immutable Double-Entry Ledgers & Closed-Loop Wallets
Every balance mutation in my wallet engines (Building a Secure Closed-Loop Ledger in Go) is recorded as an append-only double-entry journal row protected by PostgreSQL row locks, cryptographic hash chains, and idempotency keys (Modeling Resilient Payment States).
3. PCI-DSS Scoping, PII Masking & Audit Logging
I implement strict PAN/CVV tokenization boundaries and structured log redaction (PCI-DSS Compliance in Go Microservices) so your core microservices remain out of sensitive cardholder data scope.
Hire a Freelance Go Payment & Ledger Programmer
- Upwork: https://www.upwork.com/freelancers/aldianf
- Related Guide: Hire a Freelance Golang Microservices Programmer