Capture high-converting real-time QR and bank transfer payments across Singapore (PayNow), Indonesia (QRIS/Virtual Accounts), and Malaysia (DuitNow/FPX) with senior freelance programmer Aldian Fazrihady. 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: Dynamic EMVCo QR Code Generation, Webhook Signature Verification & Instant Settlement Sync

def verify_xendit_callback_token(received_token: str, expected_secret: str) -> bool:
    import hmac
    return hmac.compare_digest(received_token or "", expected_secret)

2. Why Engineering Leaders Hire Aldian Fazrihady

  • End-to-End Senior Ownership: 15+ years building production systems in Python (Django, FastAPI), React/Next.js/TypeScript, Golang, PostgreSQL/pgvector, and Agentic AI (RAG, MCP, Google ADK, LangGraph).
  • Zero-Downtime Delivery & FinOps Discipline: Every feature ships with automated tests, strict lock-timeout migrations, and cloud cost governance.
  • Immediate Onboarding: Direct collaboration in your GitHub, Slack/Teams, and CI/CD pipelines within 24–48 hours.

3. Topical Category Hubs & Master Directory

About the Author — Hire Freelance Programmer Aldian Fazrihady

Aldian Fazrihady is a Top-Rated Senior Freelance Programmer, Freelance Full Stack Developer, and AI Application Engineer with 15+ years of production software engineering experience and Google Cloud Professional Cloud Architect & Data Engineer certifications. He specializes in building custom LLM & autonomous AI agents, RAG pipelines, Next.js/React PWAs, Python (Django/FastAPI), Go microservices, and serverless cloud infrastructure on Google Cloud Run and AWS.

Hire Aldian Fazrihady on Upwork | Book 1-Day Programming Service ($100 USD via Polar) | View Live AI Portfolio | Portfolio Directory | Send a Direct Message

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