📰 Dev.to · Archit Mittal

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All Articles 77,980 Blog Posts 103,271 Tech Tutorials 19,014 Research Papers 16,896 News 13,468 ⚡ AI Lessons

Dev.to · Archit Mittal 1w ago

Build a UPI QR Code Generator with Logo in 46 Lines of Python

Every time I pay a vendor in India, I'm reminded that UPI is just a URL standard....

Dev.to · Archit Mittal 1w ago

Build a GST Invoice Parser in 60 Lines of Python

If you handle Indian invoices for any business, you know the month-end ritual: thirty vendor PDFs...

Dev.to · Archit Mittal 1mo ago

Build a UPI Transaction Categorizer in 95 Lines of Python

If you use UPI for everything (and at this point, who in India doesn't?), your bank statement is a...

Dev.to · Archit Mittal 1mo ago

Build a Bulk PDF Invoice Renamer in 55 Lines of Python

Last month, my CA messaged me at 11pm: "Bhai, send all April invoices in a single zip, named...

Dev.to · Archit Mittal 1mo ago

Build a GST Invoice PDF Extractor in 53 Lines of Python

If you run a small business in India, you've felt this pain: a folder full of PDF invoices from...

Dev.to · Archit Mittal 1mo ago

Build a UPI Transaction Reconciliation Tool in 52 Lines of Python

I track every UPI transaction across PhonePe, Google Pay, and Paytm. Three apps, three different CSV...

Dev.to · Archit Mittal 1mo ago

Build a GST Invoice Generator in 80 Lines of Python

If you're a freelancer, consultant, or small business owner in India, you've probably paid...

Dev.to · Archit Mittal 1mo ago

Build Your First AI Agent in 60 Lines of Python — No Framework Needed

Everyone's talking about AI agents, but most tutorials start with heavyweight frameworks, API keys,...

Dev.to · Archit Mittal ⚡ AI Lesson 1mo ago

How I Saved a Mumbai CA Firm ₹18 Lakh/Year by Automating GST Invoice Reconciliation

Last month, I worked with a mid-sized CA firm in Andheri, Mumbai. They had 4 junior accountants whose...

Dev.to · Archit Mittal 1mo ago

Automate Your UPI Transaction Tracking: 60 Lines of Python (Free, Works Offline)

UPI processes over 16 billion transactions a month in India. If you are like most people, you pay...

Dev.to · Archit Mittal 1mo ago

I Built a Claude Code Sub-Agent That Processes 2,000 Invoices a Day — Here's the Exact Setup

A small Gurgaon-based CA firm came to me last month with a recurring nightmare: 2,000+ vendor...

Dev.to · Archit Mittal 1mo ago

Build a Desktop File Organizer in 35 Lines of Python — Weekend Project

Your Downloads folder is a mess. Mine was too — 400+ files, zero organization. So I spent a Saturday...

Dev.to · Archit Mittal 2mo ago

How I Built an Automated WhatsApp Invoice System for My Client in 3 Hours

Last week, a CA firm in Jaipur reached out to me with a painfully familiar problem: their accountant...

Dev.to · Archit Mittal 2mo ago

I Had My First Automated Trade Running in 47 Minutes — Here's the Exact Setup

A friend called me last week with a familiar problem. He had been comparing broker API documentation...

Dev.to · Archit Mittal 2mo ago

How I Automated Invoice Processing for a ₹2Cr/Year Business in 3 Days

Last month, a textile exporter in Surat reached out to me with a familiar problem: their accounts...

Dev.to · Archit Mittal 2mo ago

How I Automated ITR Document Collection and Why Every CA Firm in India Needs This

Tax season in India is a special kind of chaos. Every year, between January and March, chartered...

Dev.to · Archit Mittal 2mo ago

How I Automated ITR Document Preparation With 40 Lines of Python

My chartered accountant called me last week. Five days before March 31. His voice had that familiar...