Kubai Kevin

Senior engineer title inflation in 2026

How AI-generated code changes senior-engineer expectations: residency-aware LLM gateways, retry budgets, audit logs, and verification you can run.

11 min read · 13 August 2026

Cost-Effective AI Infrastructure for Micro-SaaS

How to architect an AI micro-SaaS on a tight budget: caching, batching, serverless scaling, cost measurement, and the failure modes that break naive designs.

15 min read · 5 August 2026

Boring AWS Lambda layers that don’t lock…

How to version, publish and reference Lambda layers so runtime upgrades, region moves and architecture changes don't break dependent functions.

12 min read · 31 July 2026

Poolers won’t save your serverless DB

Why poolers add latency and cost to bursty serverless workloads, and how multiplexing, the Aurora Data API, and direct connections compare.

14 min read · 19 July 2026

Observability for Long-Running LLM Agent Workflows

Design an observability stack for agentic LLM workloads: millisecond event timestamps, queue-depth metrics, and bounded buffering that survives outages.

14 min read · 17 July 2026

Audit trails: ImmutableDB vs DynamoDB Streams

Compare append-only hash-chained logs with DynamoDB Streams for audit trails: replay, tamper evidence, cost model, and a decision checklist.

15 min read · 4 July 2026

Serverless Cold Starts: Cost Levers and How to Measure Them

Cold starts are a cost and consistency problem, not just latency. Learn how to measure latency-per-dollar and tune concurrency, memory, and architecture.

12 min read · 20 June 2026

Neon vs PlanetScale vs Turso: which broke first?

Diagnose connection drops, replica lag and proxy limits in Neon, PlanetScale and Turso, with reproducible tests and fixes that do not rely on guesswork.

13 min read · 10 June 2026