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Tech14 min read

Stop Bloating Your Database: The S3 Pointer Pattern

Why 10MB JSON blobs kill your buffer pool, and how to keep MySQL lean with S3 + presigned URLs.

#MySQL#S3
Tech4 min read

Verify vs Cert: The Python Requests Handbook

Understanding SSL/TLS in Python Requests: The 'verify' and 'cert' arguments explained with interactive animations.

#Coding#Security
Tech6 min read

API Certificates: The Mastery Guide to Debugging & The Chain of Trust

Stop guessing with SSLErrors. A mastery-level guide to the Chain of Trust, openssl debugging, and proving exactly whose fault it is.

#System Design#Security#API
Tech5 min read

Authentication vs. Authorization vs. OAuth: The 'ID Card' Mental Model

Stop mixing up 401 and 403. A mastery guide to AuthN (Who you are), AuthZ (What you can do), and the OAuth Valet Key.

#System Design#Security#API
Tech4 min read

Consistent Hashing: The 'Locker Room' Mental Model

How does Cassandra know which server stores your data? Master consistent hashing, virtual nodes, and scaling distributed systems reliably.

#System Design#Distributed Systems#Hashing
Tech5 min read

Docker vs. Kubernetes: The 'Hotel Manager' Mental Model

Why do I need K8s if I have Docker? A mastery guide to understanding Containers (Robots) vs Orchestration (The Manager).

#DevOps#Docker#Kubernetes
Tech3 min read

Latency vs. Throughput: The 'Water Pipe' Mental Model

Why is your API slow even though your internet is fast? A mastery guide to P99 latency, bandwidth, and finding the bottleneck.

#System Design#Performance#Metrics
Tech5 min read

Load Balancer, Reverse Proxy, API Gateway: The Grand Hotel Mental Model

Confused by the 'Traffic Trio'? A mastery-level guide to Load Balancers, Reverse Proxies, and API Gateways - from mental models to Nginx configs.

#System Design#Networking#Infrastructure
Tech4 min read

Monolith vs. Microservices: The 'Mansion vs. Village' Mental Model

Is Microservices mostly hype? A mastery guide to the 'Distributed Monolith', Latency taxes, and knowing when to split.

#System Design#Architecture#Microservices