RS

Full-stack engineer · Go · TypeScript · Next.js

Rehan Shaik

I build business software and trading systems, and I run what I ship.

Now
Lead Engineer at Aumni Digital, a New Zealand agency where I'm the only engineer
Building
GammaRails, live with real capital every trading day
Shipping
Production systems for 4+ years
Email me Resume (PDF) GitHub LinkedIn

Selected work

01 Own product

GammaRails

Backtest, paper trade and execute options trades live, in one system.

An options trading platform for Indian F&O. It trades real capital on NSE F&O every trading day.

  • Backtests run on 21 months of expired options history, stored in ClickHouse.
  • Risk limits hold at the point of execution: daily loss caps, max-trade caps, a kill switch and intraday auto square-off.
  • About 100k lines of Go behind a Next.js web app and a Flutter mobile app.
  • Runs 24/7 as 8 Docker services. The Go backend uses 94MB of RAM.

Go · Next.js · Flutter · PostgreSQL · ClickHouse · Redis · WebSocket

gammarails.com
GammaRails Quick Trade screen: NIFTY call and put prices with buy and sell buttons, running P&L and live positions
Quick Trade
GammaRails live positions table with stop-loss, take-profit and trailing stop per leg
Live positions
GammaRails backtest screen listing strategies to test
Backtest

Screens shown with demo data.

02 Aumni Digital

Local SEO automation

Agency clients' local search work, off the spreadsheet.

Built as the only engineer at Aumni Digital. The platform automates Google Business Profile posting, LLM content generation and local rank-grid tracking for agency clients.

Before

A fully manual spreadsheet workflow

After

  • Google Business Profile posting runs itself
  • Content is written by an LLM, not by hand
  • Local rank grids are tracked automatically

03 Sold software

Poultry distribution software

Sold to 3 distributors. In daily use.

Distributors run their credit ledger (khata), load inventory and GST invoicing in it. All three sales came without any marketing.

Distributors
3
Ledger
Khata
Invoices
GST

Next.js 16 · Drizzle · PostgreSQL

Also shipped

  • Aumnify. A 14-module business suite: CRM, job scheduling, email campaigns, reviews, ticketing, forms and a blog CMS. Next.js, React 19, ElysiaJS on Bun, PostgreSQL.
  • Restaurant POS. Point of sale for 50+ active restaurant locations, with live kitchen orders, Zomato and Swiggy orders, and thermal printing.
  • AI phone agent. Holds two-way voice calls, takes inbound calls, dials out and collects structured answers. Twilio and xAI Realtime.

Work history

  1. Dec 2025 – Present Lead Engineer Aumni Digital · New Zealand, remote
  2. Feb 2024 – Sep 2025 Software Engineer (Full-Stack) Youngminds Technology Solutions · Remote
  3. Feb 2023 – Feb 2024 Software Developer ProYuga Advanced Technologies · Remote
  4. May 2022 – Jan 2023 Software Engineer Intern Youngminds Technology Solutions

Hiring, or building something?

rehan@rehanshaik.com