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Design a Notification System: The Four-Point Answer, and the Duplicate-Send Trap

Design a Notification System: The Four-Point Answer, and the Duplicate-Send Trap

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8 min read
Payment Processing Idempotency: Why Redis Cache Can Fail in Production

Payment Processing Idempotency: Why Redis Cache Can Fail in Production

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7 min read
That Time Client Retries Turned a Recovery Into a 7-Hour Outage

That Time Client Retries Turned a Recovery Into a 7-Hour Outage

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2 min read
How do you recover webhooks when your backend is unavailable?

How do you recover webhooks when your backend is unavailable?

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1 min read
Stop Leaking Data to Cloud APIs: Self-Hosting DeepSeek Locally with Ollama

Stop Leaking Data to Cloud APIs: Self-Hosting DeepSeek Locally with Ollama

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2 min read
Stop Choosing Between RAG, Fine-Tuning, and Agents: Build the Hybrid Trio Instead

Stop Choosing Between RAG, Fine-Tuning, and Agents: Build the Hybrid Trio Instead

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3 min read
Consistent Hashing: The System Design Interview Concept Everyone Gets Wrong

Consistent Hashing: The System Design Interview Concept Everyone Gets Wrong

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2 min read
Sentinel: Ingest Path and Log Schema

Sentinel: Ingest Path and Log Schema

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16 min read
The Bug Where a Customer Got Charged Twice for Nothing They Did Wrong

The Bug Where a Customer Got Charged Twice for Nothing They Did Wrong

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7 min read
Our System Series: Event Processing. From Business Events to External Actions

Our System Series: Event Processing. From Business Events to External Actions

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6 min read
Why Pharma ERP Dashboards Don't Create Supply Chain Visibility: The Data Architecture Behind Better Decisions

Why Pharma ERP Dashboards Don't Create Supply Chain Visibility: The Data Architecture Behind Better Decisions

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5 min read
Scaling CrimeLens: From Performance Baseline to Measurable Backend Improvements

Scaling CrimeLens: From Performance Baseline to Measurable Backend Improvements

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4 min read
Day 17 — Message Broker — RabbitMQ vs Kafka

Day 17 — Message Broker — RabbitMQ vs Kafka

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1 min read
Architecting the New Operating System: A Guide to Context Engineering

Architecting the New Operating System: A Guide to Context Engineering

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2 min read
Beyond Writing Code: The Core Mindset of a Modern Software Engineer

Beyond Writing Code: The Core Mindset of a Modern Software Engineer

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2 min read
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