ARCHITECTURAL WAR STORIES & BLUEPRINTS

Production case studies. Zero theory, hard metrics.

Explore real-world engineering interventions: from extinguishing critical e-commerce performance fires during Black Friday, to zero-downtime monolith decomposition, to deterministic AI systems.

Peak CCU

65 000+

Surge-proof throughput

p99 Latency

-98.3%

From 1,450 ms down to 24.5 ms

Release Frequency

+56x

From 1/month to 14/week

AI Autonomy

78%

Zero hallucinations in ERP

HIGH-LOAD SCALING

Top E-Commerce Fashion & Retail (EU)•6 min read

Scaling a Transactional Engine to 65k CCU During Black Friday

Overhauling an e-commerce platform from HTTP 504 outages at 12k CCU to flawless execution of 65k CCU during Black Friday peak via RoadRunner, RabbitMQ, and Redis sharding.

Peak throughput

65,000 CCU12,000 CCU (crash)

+440%

Transaction p99 latency

24.5 ms1,450 ms

-98.3%

Dropped orders

0.000%4.8% (504 errors)

Zero loss

PHP 8.3RoadRunnerPostgreSQLRabbitMQRedis ClusterKubernetes

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STRANGLER FIG MIGRATION

B2B Logistics & Supply Chain Platform•7 min read

Zero-Downtime Strangler Fig Decomposition of an 8-Year Monolith

Safe decomposition of 450k lines of legacy code using the Strangler Fig pattern with Traefik and Vertical Slice Architecture. Deployment frequency grew from 1/month to 14/week with zero downtime.

Deployment frequency

14 per week1 per month

+56x

Regression detection time

4 minutes (CI/CD)3-5 days (manual)

Instant

Migration downtime

0.00 seconds24h+ risk

100% uptime

Strangler FigTraefikDDDVertical SliceDockerGitOps CI/CD

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B2B AGENTIC WORKFLOWS

International Marketplace & Distributor•5 min read

Deploying a Deterministic AI Agent for 78% of ERP Order Disputes

Multi-agent deterministic Python pipeline with hybrid RAG (pgvector + BM25) and Pydantic guardrails. Reduced dispute resolution time from 48h to 18s with 78% full autonomy.

Case processing turnaround

18 seconds48 hours

-99.9%

AI decision autonomy

78% zero touch0% (manual)

78% ROI

Operating cost reduction

-62% costsHigh manual overhead

-62%

Python 3.12FastAPIpgvectorBM25 Hybrid SearchPydantic GuardrailsERP API

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