Nguyen Dai Long – Engineering Blog https://ndlong.site/blog Technical deep-dives into backend scalability, PostgreSQL optimization, Redis caching, Docker, GCP Cloud Run, and real-time WebSockets by Nguyen Dai Long. en-us Tue, 22 Sep 2026 08:23:44 GMT <![CDATA[Scaling PostgreSQL & Redis for High-Throughput Systems (30,000+ Concurrent Users)]]> https://ndlong.site/blog/postgresql-query-optimization-redis-scaling https://ndlong.site/blog/postgresql-query-optimization-redis-scaling Fri, 28 Aug 2026 00:00:00 GMT <![CDATA[Handling 5GB+ Chunked File Uploads in Django with Background Processing]]> https://ndlong.site/blog/chunked-file-upload-5gb-django-pdf-pipeline https://ndlong.site/blog/chunked-file-upload-5gb-django-pdf-pipeline Tue, 14 Jul 2026 00:00:00 GMT <![CDATA[Optimizing Google Cloud Run and Docker Containers for 60% Cost Reduction]]> https://ndlong.site/blog/gcp-cloud-run-docker-cost-optimization https://ndlong.site/blog/gcp-cloud-run-docker-cost-optimization Tue, 02 Jun 2026 00:00:00 GMT <![CDATA[Building Real-Time Notification Systems with Django Channels and Redis Pub/Sub]]> https://ndlong.site/blog/websocket-realtime-notifications-redis https://ndlong.site/blog/websocket-realtime-notifications-redis Tue, 19 May 2026 00:00:00 GMT <![CDATA[Zero-Server Image Compression Using HTML5 Canvas and Web Workers]]> https://ndlong.site/blog/client-side-image-compression-canvas-web-worker https://ndlong.site/blog/client-side-image-compression-canvas-web-worker Sat, 11 Apr 2026 00:00:00 GMT <![CDATA[System Design: Scaling a Production URL Shortener to 100M Requests/Month]]> https://ndlong.site/blog/system-design-url-shortener-100m-requests https://ndlong.site/blog/system-design-url-shortener-100m-requests Fri, 18 Sep 2026 00:00:00 GMT <![CDATA[PostgreSQL Connection Pooling in High-Concurrency Environments with PgBouncer]]> https://ndlong.site/blog/postgresql-pgbouncer-connection-pooling-guide https://ndlong.site/blog/postgresql-pgbouncer-connection-pooling-guide Tue, 15 Sep 2026 00:00:00 GMT <![CDATA[Benchmarking Async Python: FastAPI vs. Django Ninja in High-Throughput Microservices]]> https://ndlong.site/blog/fastapi-vs-django-ninja-high-throughput-benchmark https://ndlong.site/blog/fastapi-vs-django-ninja-high-throughput-benchmark Sat, 12 Sep 2026 00:00:00 GMT <![CDATA[Mastering Distributed Locks with Redis: When Redlock Fails and How to Fix It]]> https://ndlong.site/blog/redis-distributed-lock-redlock-pitfalls https://ndlong.site/blog/redis-distributed-lock-redlock-pitfalls Tue, 08 Sep 2026 00:00:00 GMT <![CDATA[Hardening Production Docker Images: From 1.2GB Bloat to 48MB Distroless Containers]]> https://ndlong.site/blog/docker-multistage-builds-production-security https://ndlong.site/blog/docker-multistage-builds-production-security Fri, 04 Sep 2026 00:00:00 GMT <![CDATA[Designing High-Throughput API Rate Limiters: Token Bucket vs. Sliding Window Log in Redis]]> https://ndlong.site/blog/building-rate-limiter-token-bucket-redis https://ndlong.site/blog/building-rate-limiter-token-bucket-redis Sun, 30 Aug 2026 00:00:00 GMT <![CDATA[Next.js App Router Architecture: Demystifying the 4 Layers of Server Caching]]> https://ndlong.site/blog/nextjs-15-app-router-caching-deep-dive https://ndlong.site/blog/nextjs-15-app-router-caching-deep-dive Sat, 22 Aug 2026 00:00:00 GMT <![CDATA[Database Scaling Strategies: Declarative Table Partitioning vs. Horizontal Sharding]]> https://ndlong.site/blog/database-sharding-vs-partitioning-guide https://ndlong.site/blog/database-sharding-vs-partitioning-guide Sun, 16 Aug 2026 00:00:00 GMT <![CDATA[gRPC vs. REST for Internal Microservices: Real-World Latency and Throughput Comparison]]> https://ndlong.site/blog/grpc-vs-rest-microservices-communication https://ndlong.site/blog/grpc-vs-rest-microservices-communication Mon, 10 Aug 2026 00:00:00 GMT <![CDATA[Applying Clean Architecture and Domain-Driven Design (DDD) in Enterprise Python]]> https://ndlong.site/blog/clean-architecture-python-domain-driven-design https://ndlong.site/blog/clean-architecture-python-domain-driven-design Sun, 02 Aug 2026 00:00:00 GMT <![CDATA[Zero-Downtime Database Migrations: The Expand and Contract Pattern in Production]]> https://ndlong.site/blog/zero-downtime-deployment-database-migrations https://ndlong.site/blog/zero-downtime-deployment-database-migrations Sun, 26 Jul 2026 00:00:00 GMT <![CDATA[Bulletproof Authentication Architecture: JWT Access Tokens with Rotating HttpOnly Refresh Cookies]]> https://ndlong.site/blog/jwt-security-best-practices-refresh-tokens https://ndlong.site/blog/jwt-security-best-practices-refresh-tokens Sat, 18 Jul 2026 00:00:00 GMT <![CDATA[Event-Driven Architecture: When to Choose Apache Kafka vs. RabbitMQ for Production]]> https://ndlong.site/blog/kafka-vs-rabbitmq-event-driven-architecture https://ndlong.site/blog/kafka-vs-rabbitmq-event-driven-architecture Mon, 06 Jul 2026 00:00:00 GMT