Piraisudan R

Experience

1. Full Stack Engineer · AppGrape

   Oct 2024 - Present

   Shipped a B2B e-commerce platform, a five-module ERP, a multi-tenant dashboard builder, and an on-device macOS transcription app for a small product studio.

   Next.js · React · TypeScript · PostgreSQL · Supabase · SwiftUI

2. Full Stack Engineer · GrepBio

   Oct 2024 - Sep 2025

   Built a customer-facing RNA-seq analysis portal for 100+ scientists: 50 GB uploads, 20k-point interactive plots, MFA, and on-demand LaTeX reports. Dates overlap with AppGrape — this was concurrent work.

   React · TypeScript · FastAPI · MongoDB · D3.js

3. Software Engineer · Renault Nissan

   Jan 2021 - Sep 2024

   One of six engineers migrating a 100k+ line C++ codebase from CATIA V6 to 3DEXPERIENCE. Built a Python review tool that sped the migration up 4x and is still in use.

   C++ · Python · 3DEXPERIENCE

Selected work

• High-performance e-commerce platform · AppGrape

  Oct 2025 - Present

  Customer-facing store for a US B2B medical-instrument client, with inventory analytics, asset management, and payment checkout.

• AppGrape Business ERP · AppGrape

  50% faster operations

  Five-module ERP - booking, CRM, inventory, accounts, and biometric payroll - that cut operations time by 50% for a real-estate developer.

• Geolocation tracker · AppGrape

  Oct 2025 - Present

  War-room dashboard that turns workforce GPS into a live heatmap, with PostgreSQL aggregates and Azure Functions for real-time queries.

• React component library and studio · AppGrape

  Oct 2025 - Present

  Multi-tenant dashboard builder and React/TypeScript UI kit with row-level security and direct PostgreSQL access, no ORM in the middle.

• EchoDolphin · AppGrape

  400+ users

  On-device macOS app for video transcription and subtitle styling, plus a React storefront with Razorpay and PayPal checkout.

• Data analysis dashboard · GrepBio

  100+ active users

  Customer portal for 20,000+ point plots and 50GB+ file transfers, with MFA, D3.js views, and on-demand report generation.

• Migration automation tool · Renault Nissan

  4× faster migration

  Python tool that flagged unhandled pointers, missing checks, and deprecated APIs, becoming a lasting team standard after I left.

• C++ codebase migration to 3DEXPERIENCE · Renault Nissan

  Jan 2021 - Sep 2024

  Team of six migrating 100,000+ lines of C++ from CATIA V6 so the codebase would run correctly inside Dassault’s 3DEXPERIENCE platform.

Skills

Frontend

React, Next.js, TypeScript, JavaScript, Tailwind CSS, D3.js, SwiftUI

Backend

Python, FastAPI, C++

Databases

PostgreSQL, Supabase, MongoDB

Cloud & DevOps

AWS, Azure Functions, Docker, Linux

Tools

Git & GitHub