Tutorials Intermediate
Opus 4.8 Mid-Convo System Messages in Python (Cache-Safe)
Use Opus 4.8 role:system messages mid-conversation to update agent rules without invalidating cache.
10 min read·Kodetra Technologies
2d agoGuides
AI Guides for Builders
How-to content for builders, indie hackers, and AI engineers. Less theory, more shipped code.
Tutorials 
System Design Advanced
Cache Stampede: Beat the Thundering Herd in Redis
Stop cache stampedes with locking, single-flight, and probabilistic early expiry.
11 min read·Kodetra Technologies
9d ago
System Design Intermediate
Hedged Requests: Tame P99 Tail Latency at Scale
Send a backup when the first call is slow. Cut P99 tail latency without overloading services.
9 min read·Kodetra Technologies
11d ago
Backend Intermediate
Postgres SKIP LOCKED: A Job Queue Without Redis
Build a reliable production job queue using only Postgres FOR UPDATE SKIP LOCKED.
12 min read·Kodetra Technologies
20d ago
System Design Advanced
Saga Pattern: Distributed Transactions Without 2PC
Coordinate multi-service writes with orchestration, choreography, and compensating transactions.
10 min read·Kodetra Technologies
23d ago
System Design Intermediate
Backpressure in Streaming Systems: A Production Guide
Stop drowning consumers. Pull, drop, and credit-based backpressure with code.
10 min read·Kodetra Technologies
25d agoMore guides like this?
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System Design Advanced
Cell-Based Architecture: Limit Blast Radius at Scale
Partition systems into isolated cells to cap blast radius and survive failures gracefully.
13 min read·Kodetra Technologies
May 2
System Design Intermediate
Transactional Outbox Pattern: Stop Losing Events
Guarantee events publish even when Kafka is down. Outbox pattern with Postgres, step-by-step.
7 min read·Kodetra Technologies
Apr 29