Substack
LoRA: tune your own model, for on-device usage
A practical LoRA journey: why I reached for it, what it actually does, how I set it up, and why the training data mattered more than the code.
AIModel TrainingLoRALearningDev Tools
Writing · Stories · Ideas
Stories & Ideas
A place for my blog posts on tech and life — and the kids' books I'm writing one page at a time.
Free · 30 min · Weekends 3–5 PM IST
Got a question? Let's talk ☕
Product · AI · Career · Building things — I'd love to chat.
Latest Posts
All posts →Substack
Expense Report submission automated — Reclaimed My Sunday!
Post-trip expense reports used to consume Sunday evenings. Here is how I built a custom AI skill that drives Edge CDP, matches receipts, and turns every line green.
AIAutomationProductivity
Substack
From Idea to Play Store: How I Used Copilot CLI to Ship My First Android App
How Copilot CLI, Next.js, Capacitor, and a local-first architecture helped turn Atlas Junior into a real Android app and a Play Store launch.
AIAndroidStartup
Kids' Books 📖
26 published
Mina and the Sorry Splash
Ages 3-5
“Saying sorry and helping make things right can heal a hurt heart.”
Indra Learns About Balance
Ages 3-5
“Balance your fun and work!”
Zuzu and the Floating Starship
Ages 3-5
“Kindness and helping others brings friendship and joy.”
Zara and the Moonstone Map
Ages 3-5
“Curiosity and courage will always light your way.”
About Me
Product, writing, and side projects
Hi, I'm Sumit Chatterjee — a product leader with 15+ years across Microsoft, Google, and startups, currently a Group Product Manager at Microsoft Windows.
Outside work, I build side projects, write about tech and life, and create bedtime stories for my kids that quietly carry values I hope they grow up with.