How Browsers Turn HTML into Pixels — The Critical Rendering Path
Understand the browser rendering pipeline, critical path delays, layout thrashing, render-blocking scripts, and Core Web Vitals fixes.
Blog
Read practical system design, backend engineering, infrastructure, and reliability notes connected to interactive TechViz Hub demos.
Why Your Database Query Went from 2ms to 2 Seconds
Learn how B-Tree indexes speed up database queries, why full table scans happen, and how fragmentation or over-indexing hurts writes.
How Do Cloud Platforms Handle Black Friday Traffic?
Learn how Kubernetes HPA handles traffic spikes, cold starts, scaling flaps, and database connection limits during production load surges.
Cache Invalidation: Stale Data, TTLs, and Herds
Learn cache invalidation strategies, stale data risks, thundering herd failures, and Redis patterns that keep production data consistent.
How Engineering Teams Ship Features Without Breaking Production
Learn how canary and blue-green deployments reduce production risk, catch regressions, handle schema changes, and trigger safe rollbacks.
How Do Streaming Platforms Serve Video in Under 50ms?
Learn how CDN edge caching, TTLs, origin shielding, and stale-while-revalidate reduce latency and protect origins during traffic spikes.
How Teams Ship Code 50 Times a Day Without Breaking Things
Learn how CI/CD pipelines move code safely through build, test, deploy, and rollback stages while avoiding flaky tests and staging drift.
How Systems Like Netflix Prevent Cascading Failures
Learn how circuit breakers stop cascading microservice failures with timeouts, fallback responses, half-open probes, and recovery tuning.
Consistent Hashing: Surviving Cache Node Failures
Learn how consistent hashing, hash rings, virtual nodes, and bounded load reduce cache movement and hotspots when nodes join or fail.
How Databases Survive Hardware Failures Without Losing Data
Learn how database replication handles read scaling, failover, WAL streaming, replication lag, split-brain risk, and data loss tradeoffs.
How Systems Like Uber Scale Databases to Handle Millions of Rides
Learn how database sharding scales writes, why shard keys create hotspots, and how hash, range, and virtual shards affect operations.
Database Connection Pool Exhaustion at 3 AM
Learn why database connection pools exhaust under leaks, slow queries, and bad lifetimes, and how PgBouncer and sizing prevent outages.
Debugging Latency Across Microservices
Learn how distributed tracing, trace IDs, spans, propagation, sampling, and OpenTelemetry reveal latency across microservice calls.
What Actually Happens When You Type a URL and Press Enter
Learn how DNS resolution works from browser cache to authoritative nameservers, and why TTLs, resolver outages, and DNSSEC matter.
Error Budgets: Balancing Reliability and Speed
Learn how SRE teams use error budgets, SLIs, SLOs, burn rates, and multi-window alerts to balance reliability with shipping speed.
How Platforms Ship Features to 1% of Users Before Everyone Else
Learn how feature flags enable progressive delivery, segment rollouts, kill switches, and A/B tests without creating flag debt.
Why Your Java App Froze for 500ms — Understanding GC Pauses
Learn why garbage collection pauses spike p99 latency, how mark-sweep-compact works, and when G1GC, ZGC, or Shenandoah help.
How Kubernetes Decides When to Kill and Restart Your Container
Learn how Kubernetes liveness, readiness, and startup probes control pod traffic, restarts, CrashLoopBackOff, and dependency failures.
JWT Authentication and Token Revocation Tradeoffs
Learn how JWT authentication works, why revocation is hard, and how to prevent none-alg attacks, stolen tokens, and replayed refresh tokens.
How Event-Driven Platforms Process Trillions of Messages Per Day
Learn how Kafka handles high-volume event streams with partitions, replication, ISR, consumer groups, backpressure, and durable producers.
How Games Rank Millions of Players in Real Time
Learn how Redis Sorted Sets power real-time leaderboards, rank lookups, score updates, memory scaling, and consistency tradeoffs.
When Your Load Balancer Goes Down
Learn what happens during load balancer failure: VRRP split-brain, standby capacity mismatch, DNS TTL delays, and HA failover recovery.
Round Robin vs Least Connections Load Balancing
Compare load balancing algorithms like round robin, least connections, IP hash, and L7 routing, plus when each fails in production.
Why Background Jobs Fail Silently
Learn how message queues handle background work, poison messages, dead letter queues, backpressure, acknowledgments, and retries.
How 'Sign in with Google' Actually Works Under the Hood
Learn how OAuth 2.0 Sign in with Google works: authorization codes, redirect URIs, token exchange, PKCE, state, and token theft risks.
Raft Consensus: How Databases Agree on Data
Learn how Raft consensus handles leader election, log replication, network partitions, split-brain prevention, and log divergence.
API Rate Limiting Without Blocking Good Users
Learn how token bucket rate limiting handles API abuse, burst traffic, Redis counter contention, IP rotation, and legitimate client spikes.
Token Bucket vs Leaky Bucket Rate Limiting
Compare fixed window, sliding window, token bucket, and leaky bucket rate limiting, including burst attacks and retry storm failure modes.
Why Redis Is Fast With a Single Thread
Learn why Redis is fast with a single-threaded event loop, epoll, in-memory data, pipelining, and where blocking commands break it.
How to Design a Caching Layer That Actually Works Under Load
Learn how to design a Redis caching layer that handles cache penetration, hot key expiry, cache avalanche, TTLs, and production load.
Redis Crash and Thundering Herd Recovery
Learn what happens when Redis crashes, why traffic stampedes the database, and how stale-while-revalidate and locks reduce blast radius.
Redis Sessions Without Sticky Load Balancing
Learn how Redis-backed sessions work across servers, avoid sticky sessions, survive deploys, and prevent hijacking or session data loss.
How HTTPS Secures Your Connection in a Single Network Round-Trip
Learn how the TLS 1.3 handshake secures HTTPS with ClientHello, ECDHE, certificates, 1-RTT setup, and 0-RTT replay risks.
TCP Congestion Control and Internet Stability
Learn how TCP congestion control uses slow start, AIMD, cwnd, ssthresh, and fast retransmit to prevent congestion collapse.
SQL Injection: How It Works and How to Stop It
Learn how SQL injection attacks bypass logins, extract data, and abuse timing side channels, and why parameterized queries stop them.
What Happens When Your Load Balancer Crashes Mid-Traffic
Learn the basics of load balancer failover, from health checks and standby nodes to DNS behavior, backend capacity, and recovery tests.
Redis Caching Patterns That Actually Work Under Production Load
Learn practical Redis caching patterns: cache-aside, write-through, write-behind, TTLs, eviction policy, null caching, and hot key defense.