Sachin's DevLog

Reflections on engineering, product design, and the architecture of the web.

A/B Testing Infrastructure: Building Your Own Experiment Framework

Architect a deterministic, high-performance A/B testing and feature flagging engine using hashing algorithms without database bottlenecks.

Aug 6, 2026•22 min read

Sachin SharmaAug 6

Agritech: Building a Sensor Data Pipeline for Crop Monitoring

Learn how to build a scalable agritech telemetry pipeline for soil moisture, ambient temperature, and satellite imagery processing.

Domain22 min read

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Agritech: Building a Sensor Data Pipeline for Crop Monitoring

Sachin SharmaAug 6

Analytics Engineering: Building an Event Pipeline That Doesn't Lie

Architect a trustworthy user event tracking pipeline with JSON Schema validation, deduplication, and dead-letter queues (DLQ).

Data22 min read

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Analytics Engineering: Building an Event Pipeline That Doesn't Lie

Sachin SharmaAug 6

AudioWorklet Low Latency Custom Audio Processing: Web Audio API Deep Dive

Web Audio API AudioWorklet low latency custom audio processing MDN guide — off-main-thread pitch detection, YIN algorithm, real-time synthesis, and production patterns.

Emerging26 min read

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AudioWorklet Low Latency Custom Audio Processing: Web Audio API Deep Dive

Sachin SharmaAug 6

Auditing Your Own Cloud IAM for the Same Mistake Azure Made

The Microsoft SAS token breach exposed an IAM misconfiguration that lives in most cloud accounts right now. Here's exactly how to find and fix it in your own AWS, GCP, or Azure setup.

Security22 min read

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Auditing Your Own Cloud IAM for the Same Mistake Azure Made

Sachin SharmaAug 6

Bot Detection Beyond CAPTCHA: Behavioral Signals in Practice

CAPTCHAs frustrate legitimate users. Learn how to detect automated headless browser bots using mouse entropy, web audio fingerprinting, and JA3 TLS signatures.

Trust & Safety22 min read

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Bot Detection Beyond CAPTCHA: Behavioral Signals in Practice

Sachin SharmaAug 6

Memory Lifecycle Hooks in Browser Extensions: Forcing GC Boundaries and Avoiding Tab Crashes

Optimising memory lifecycle hooks: forcing garbage collection boundaries inside volatile browser extension sandboxes, and purging lingering detached DOM nodes to avoid tab crashes.

Emerging24 min read

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Memory Lifecycle Hooks in Browser Extensions: Forcing GC Boundaries and Avoiding Tab Crashes

Sachin SharmaAug 6

Building a CDN Cache Invalidation Strategy That Scales

Learn how to architect fine-grained CDN cache purging strategies using Cache Tags, Stale-While-Revalidate, and Surrogate-Keys.

Performance26 min read

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Building a CDN Cache Invalidation Strategy That Scales

Sachin SharmaAug 6

Building a Chrome DevTools Extension for Your Own Debugging Workflow

Learn how to build custom Chrome DevTools panels to inspect application state, monitor API payloads, and accelerate your team's debugging workflow.

Tooling22 min read

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Building a Chrome DevTools Extension for Your Own Debugging Workflow

Sachin SharmaAug 6

Building a CLI Tool With Clig.dev Principles

Design robust, developer-friendly command-line tools adhering to clig.dev best practices: flags, signal handling, output formatting, and stdout/stderr separation.

Tooling20 min read

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Building a CLI Tool With Clig.dev Principles

Sachin SharmaAug 6

Building a Custom ESLint Rule for Your Team's Conventions

Automate code quality and enforce architecture boundaries by writing custom ESLint rules using TypeScript AST parsing.

Tooling20 min read

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Building a Custom ESLint Rule for Your Team's Conventions

Sachin SharmaAug 6

Building a Custom Load Balancer: Algorithms Compared

Learn how to build a layer 7 load balancer in TypeScript while comparing Round Robin, Weighted Least Connections, and Consistent Hashing algorithms.

Networking26 min read

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Building a Custom Load Balancer: Algorithms Compared

Sachin SharmaAug 6

Building a Custom Reverse Proxy With Nginx Lua Scripts

Learn how OpenResty and Nginx Lua scripts enable dynamic routing, custom JWT authentication, and edge rate limiting without backend application overhead.

Networking26 min read

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Building a Custom Reverse Proxy With Nginx Lua Scripts

Sachin SharmaAug 6

Building a Detection Rule for the Exact Pattern Behind a Real 2026 Breach

Reverse-engineering the MITRE ATT&CK TTPs from a real 2026 breach disclosure and translating them into Sigma detection rules, SIEM queries, and automated alerting.

Security24 min read

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Building a Detection Rule for the Exact Pattern Behind a Real 2026 Breach

Sachin SharmaAug 6

Building a Matchmaking System: ELO and Beyond

Understand the algorithms powering competitive game matchmaking: ELO, Glicko-2, and TrueSkill. Implement a queue matcher in TypeScript.

Gaming22 min read

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Building a Matchmaking System: ELO and Beyond

Sachin SharmaAug 6

Building a Plugin System With WebAssembly Sandboxing

Safely run third-party untrusted code inside your Node.js or browser application using WebAssembly memory sandboxing.

Emerging22 min read

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Building a Plugin System With WebAssembly Sandboxing

Sachin SharmaAug 6

Building a Podcast Transcription Pipeline With Speaker Diarization

Build an automated speech-to-text pipeline using OpenAI Whisper and pyannote.audio for accurate multi-speaker transcription and diarization.

Media22 min read

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Building a Podcast Transcription Pipeline With Speaker Diarization

Sachin SharmaAug 6

Building a Preview Environment System for Every PR

Learn how to build ephemeral preview environments for pull requests using Kubernetes namespaces, Vercel/Preview deployments, and Cloudflare wildcard DNS.

Platform Eng22 min read

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Building a Preview Environment System for Every PR

Sachin SharmaAug 6

Building a Regex Engine From Scratch to Understand Backtracking

Learn how regular expression engines evaluate patterns. Compare catastrophic NFA backtracking against Thompson's NFA state machine construction.

Languages26 min read

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Building a Regex Engine From Scratch to Understand Backtracking

Sachin SharmaAug 6

Building a Robotics Software Stack: ROS 2 for Web Developers

An architectural guide introducing ROS 2 concepts (nodes, topics, services, actions) to web developers using Foxglove, rosbridge, and TypeScript.

Emerging24 min read

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Building a Robotics Software Stack: ROS 2 for Web Developers

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