CH-01 · Signal / Noise
Day 30 — trace resolved
Instrumentation engineer, currently pursuing the CFA Program (Level I passed). I write a newsletter on personal finance and build the software behind it — with the code and data shipped alongside every issue.
B.Tech at COEP Technological University, plus an internship at Seiton Technologies building out an industrial control panel — P&IDs, SLDs, PLC/HMI selection, FAT. The same instincts that read a signal off a sensor are the ones I use to read a chart: flat until it isn't, then you look for why.
A running record of what actually happens with money — SIPs, step-ups, panic-selling, the maths of compounding, and whatever else the data says. Every issue ships with the Python behind it, in the open. I've also passed CFA Level I.
shantanusomwanshi.substack.comQueLessly is a live QR-ordering and digital payments platform I built and deployed — real UPI transactions, webhook-verified Razorpay integration, reconciliation-ready schema. Financial data integrity isn't theoretical when real money moves through it.
quelessly.comQR-based food ordering & digital payments platform
A production platform processing live UPI payments for college canteens — no app download required. Razorpay integration with dual confirmation (frontend + webhook) and idempotency guards, HMAC signature verification, JWT auth, and a reconciliation-ready transaction schema.
Writer & data engineer
Personal finance and investing newsletter — SIPs, compounding, market behaviour. Every issue's analysis — pandas, matplotlib/plotly, jugaad_data for Nifty pulls — ships publicly.
Control systems, from scratch
A full PID control loop written in C for an autonomous line-following robot — tuned gains through Proteus simulation and hardware testing, with integral anti-windup to stop the accumulated-error spiral.
Every issue runs on real numbers — Nifty data via jugaad_data, live NAV histories for the fund analyses — analysed in pandas. The charts below are rendered live from that same data, not screenshots.
All issuesWhy you might be putting all your eggs in one basket (unknowingly)
