~/rajat7k

identity · rajat7k

Rajat
Kaushik

Building OldMachine & YugMach. Exploring AI.

Co-founder of OldMachine — the industrial machines marketplace for India — and building YugMach packing machines. Product, engineering, and AI as a force multiplier.

Visit OldMachineVisit YugMachConnect
statusco-founder · OldMachine

What I’m building now

Two industrial products. One builder.

I’m shipping two sides of India’s machine economy — a marketplace for used industrial equipment, and a packaging-machine brand with published prices and serious SEO.

Co-founder · Product & Engineering

OldMachine

India’s buyer–seller platform for used industrial machines

We’re building OldMachine into India’s largest marketplace for buying and selling used industrial machinery — CNC, lathes, fabrication, plant equipment, power, and more. I’ve been on this as co-founder since February 2024: category-first discovery, verified sellers, real specs and photos, and direct buyer–seller conversations. No middlemen. No inflated quotes.

  • Ambition: the default pan-India platform for industrial buyers and sellers
  • Lead product & engineering across store, marketing, and seller flows
  • Trust model: verified sellers, structured listings, inspection-first deals
CNCLathesFabricationPlantPower
Marketing siteLive store

Building

YugMach

Packaging machines for manufacturers across India

I’ve also been building YugMach since 2024 — industrial packing machines (pouch, namkeen, powder, VFFS, and more) with a high-SEO product site: published prices, machine finder, quote flows, and WhatsApp-led conversion. Shipped as a Next.js + Payload CMS platform aimed at becoming India’s go-to packaging machine brand.

  • Catalogue with published machine prices (vs opaque classifieds)
  • Application SEO pages, advisor, quote wizards, and lead capture
  • Full product surface: blog, locations, spares, Hindi mirrors, admin CMS
Pouch packingNamkeenPowderVFFSQuotes
yugmach.com

About

Who I am

I’m Rajat — better known online as rajat7k. I spent about three years as a software engineer at NxtWave (through 24 July 2026): microfrontends, config-driven platforms, live classes for millions of users, and payments that had to just work.

I left that chapter to go all-in on the industrial space. I’ve been co-founding OldMachine since February 2024 — building toward India’s largest buyer–seller platform for used industrial machines — and building YugMach since 2024, the packaging-machine product and web experience for manufacturers across India.

Alongside both, I’m deep into AI tooling: Cursor, Claude, Copilot, and agent-style workflows. Extra hands for research, scaffolding, and iteration — never a substitute for judgment.

Handle

rajat7k

Building

OldMachine · YugMach

Prior

SDE @ NxtWave · ~3 yrs

Base

Hyderabad, India

Journey

Path so far

From shipping platforms at scale to building OldMachine and YugMach — same builder instincts, wider ownership.

  1. Feb 2024 – Present

    Current

    Co-founder · Product & Engineering

    OldMachine

    Building what we intend to be India’s largest buyer–seller platform for used industrial machinery. Own product and engineering across store, marketing, seller flows, and enquiry systems.

    Next.jsReactDjangoAWSMarketplace

  2. 2024 – Present

    Current

    Building product & engineering

    YugMach

    Building YugMach’s packaging-machine web product — Next.js + Payload CMS, published prices, SEO application pages, machine finder, quotes, and lead conversion for manufacturers across India.

    Next.jsPayloadSEONeonVercel

  3. Jun 2023 – Jul 2026

    Software Development Engineer

    NxtWave

    About three years shipping frontend platforms at scale — microfrontends, config-driven forms, GraphQL integrations, and Cursor AI rules that auto-generated service layers from Swagger. Left on 24 July 2026.

    ReactNext.jsMobXXStateMicrofrontends

  4. Jan 2023 – May 2023

    Frontend Intern

    NxtWave

    Shipped React features with MobX state management and hardened quality with Jest and Cypress.

    ReactMobXJestCypress

  5. 2019 – 2023

    B.Tech · Computer Science

    Lovely Professional University

    Computer science fundamentals, DSA practice, and early product experiments that grew into a career of shipping real systems.

    CSDSASystems

Selected work

Things that shipped

Product outcomes from OldMachine, YugMach, and years of platform work — architecture, conversion, and systems people actually use.

  • Building India’s buyer–seller platform for used industrial equipment — category-first discovery, verified sellers, structured specs, and direct enquiry. Aiming to be the default pan-India marketplace for industrial machines.

    • Co-founder leading product & engineering
    • Buyer discovery, seller portal, and marketing surfaces
    • Trust model: verified sellers + inspection-first deals
    Next.jsReactTypeScriptDjangoMarketplaceOpen ↗

Stack & toolkit

How I build

Strong frontend and product engineering foundation — plus an honest AI practice: tools accelerate the work; I still own the decisions.

Product frontend

  • React
  • Next.js
  • TypeScript
  • Tailwind
  • Framer Motion

State & architecture

  • XState
  • MobX
  • Microfrontends
  • Module Federation
  • Monorepos

Data & backend

  • GraphQL
  • React Query
  • Node.js
  • Django
  • Payload CMS
  • Neon
  • AWS

Quality

  • Jest
  • Cypress
  • Sentry
  • Zod
  • Swagger / OpenAPI

AI as force multiplier

  • Cursor
  • Claude
  • GitHub Copilot
  • AI rules from Swagger
  • Agent-style workflows

Notes

Thinking out loud

Occasional writing on engineering judgment, frontend systems, and how product work actually gets done.

Connect

Say hello

OldMachine, YugMach, AI experiments, collaborations, or a friendly hello — I typically reply within a day or two.

Messages go securely to my inbox. Prefer socials? Find me as rajat7k everywhere.