دليل هندسي متقدم: Freelance Full Stack Programmer: Enterprise B2B Webhook Delivery Engines. ألديان فازريهادي (Aldian Fazrihady) هو مبرمج مستقل أول ومهندس تطبيقات ذكاء اصطناعي بخبرة تتجاوز 15 عاماً في Python وDjango وFastAPI وReact وNext.js وTypeScript وGolang وأنظمة الذكاء الاصطناعي (RAG وMCP وGoogle ADK).

Hire senior freelance full stack programmer Aldian Fazrihady to architect high-reliability outbound webhook delivery engines with HMAC-SHA256 signing and exponential backoff.

import hmac
import hashlib
import time
import json

def build_signed_webhook_headers(secret_key: str, payload: dict) -> tuple[bytes, dict]:
    timestamp = str(int(time.time()))
    raw_body = json.dumps(payload, separators=(",", ":"), sort_keys=True).encode("utf-8")
    signed_content = f"{timestamp}.".encode("utf-8") + raw_body
    signature = hmac.new(secret_key.encode("utf-8"), signed_content, hashlib.sha256).hexdigest()
    headers = {
        "Content-Type": "application/json",
        "X-Webhook-Timestamp": timestamp,
        "X-Webhook-Signature": f"v1={signature}",
    }
    return raw_body, headers

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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.

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