Blog — Shubham Kumar

Blog

Thoughts & Insights

Tales from the trenches of backend engineering, system design, and building at scale.

Jul 11, 2026#architecture#ai#automation#llm#programming

Building a Telegram AI Agent for Personal Use

Build a personal AI agent in Telegram using Bun, Telegraf, SQLite, and Composio. Zero-infrastructure with conversation memory and prompt-injection defenses.

Jul 4, 2026#web-development#devops#infrastructure#architecture

What's All Am I Hosting? — Full Infrastructure Breakdown

How I run my entire online presence — main site, APIs, email, monitoring, URL shortener — for $0/month using free tiers and self-hosted infrastructure.

Jun 27, 2026#programming#performance#architecture#web-development

Building My Personal Website From Scratch: Tech Stack, Architecture, and Lessons Learned

Building a personal website from scratch: tech stack, architecture trade-offs, deployment pipeline, and lessons on performance, SEO, and DX.

Jun 20, 2026#programming#performance#functional-programming

Moving from 60s to 6s: Latency Optimization Lessons from Functional Programming

How functional programming enabled 10x latency reduction (60s→6s). Referential transparency for caching, algebraic types for errors, concurrency.

Jun 13, 2026#distributed-systems#edge-computing#offline-first

The Disconnected Edge: How We Solved In-Flight Data Sync at 35,000 Feet

In-flight data sync at 35,000 feet. Offline-first architecture, CRDT conflict resolution, bandwidth constraints, and systems with no connectivity.

Jun 6, 2026#llm#ai#security#prompt-engineering

Turning Your AI Into an Adversarial Security Agent: The SKILLS.md Framework

Using SKILLS.md to turn AI assistants into adversarial security agents. Prompt-based auditing, automated threat modeling, vulnerability discovery.

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