Stream real-time PostgreSQL row changes to search indexes, caches, and analytics warehouses with zero application dual-writes by hiring 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: WAL-Based Change Data Capture (CDC) with PostgreSQL `pgoutput`, Replication Slots & Heartbeats

-- Monitor replication slot WAL lag to prevent disk exhaustion
SELECT slot_name, active,
       pg_size_pretty(pg_wal_lsn_diff(pg_current_wal_lsn(), confirmed_flush_lsn)) AS wal_lag
FROM pg_replication_slots;

2. Core Architectural Guarantees

  • Zero Application Dual-Write Bugs: Streaming committed changes directly from the PostgreSQL Write-Ahead Log (WAL) via `pgoutput`.
  • Replication Slot Disk Safeguards: Configuring `max_slot_wal_keep_size` and automated heartbeat tables so inactive slots never fill primary disk volumes.
  • Sub-Second Search & Cache Invalidation: Updating Elasticsearch/Meilisearch, Redis, and ClickHouse within 150ms of any SQL commit.

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.

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