Bapi Biswas bapibiswas703

Hi, I'm Bapi Biswas

Senior Software Engineer · Backend & Full-Stack · Node.js · NestJS · GraphQL · AI/LLM · Microservices

About Me

Senior Software Engineer at Webskitters Technology Solutions (4+ years)
~6 years building SaaS, FinTech, E-Commerce & real-time systems
Working with AI/LLM integrations (Claude API, OpenAI), n8n automation & Supabase
Expert in Microservices, GraphQL Federation, Kafka, Redis & distributed systems
Integrated global payment gateways — Stripe, Tap Payments, Moyasar
Based in Kolkata, India

Current Focus

Building production-grade AI agents with LangChain & Claude
Designing edge-native backends with Bun / Deno
Contributing to open-source developer tooling

Ask Me About

Microservices · GraphQL Federation · Kafka · Real-time systems · Stripe & payments · LLM integrations · n8n · NestJS architecture

Tech Stack

Languages & Backend

Frameworks

AI & Automation

Frontend

Databases

Messaging & Architecture

Cloud & DevOps

Featured Projects

Project	What it does	Tech	Links
AI SaaS Integration	LLM-powered features (content gen, data extraction) in a multi-tenant SaaS	NestJS · Claude API · OpenAI · LangChain · PostgreSQL	Repo · Case study
n8n Automation Workflows	Business automation pipelines connecting 10+ services	n8n · REST · Supabase · Webhooks	Repo
Multi-Tenant SaaS Platform	Microservices with GraphQL Federation; cut latency 40%	NestJS · GraphQL · Kafka · Redis · AWS	Repo
Real-Time Chat System	10K+ concurrent users via pub/sub engine	Socket.IO · Redis · Node.js	Repo
E-Commerce Platform	Full-stack with payment gateway + logistics integration	Laravel · MySQL · AWS · Firebase	Repo
node-xray	Live runtime inspector for Node.js backends — Express, Fastify, NestJS	TypeScript · Node.js · WebSocket · AsyncLocalStorage	Repo
Indian Amount Parser	Parse Indian-currency amounts across 20+ Indian languages	JavaScript (ESM, zero deps)	Repo

Replace # placeholders with real URLs once the repos are public.

Code I'm Proud Of

A small, dependency-free utility from the Indian Amount Parser — converts spoken Hindi, Bengali, Tamil and 17 other Indian language number words into an integer:

// convert words like "एक लाख पच्चीस हज़ार" -> 125000
export function parseIndianAmount(input) {
  const text = normalize(input.toLowerCase());
  const tokens = text.split(/\s+/).filter(Boolean);

  const ONES  = { /* zero..nineteen across 20+ languages */ };
  const SCALE = { हज़ार: 1e3, लाख: 1e5, करोड़: 1e7, ... };

  let total = 0, group = 0;
  for (const t of tokens) {
    if (SCALE[t])          { group += SCALE[t]; continue; }
    if (t in ONES)         { group += ONES[t];  continue; }
    if (t === 'and' || t === 'और') continue;
  }
  return total + group;
}

See the full implementation: github.com/bapibiswas703/indian-amount-parser

GitHub Stats

Recent GitHub Activity

🚀 Published release v1.0.0 in bapibiswas703/node-xray

Certifications

JavaScript (Basic) — HackerRank
Problem Solving (Basic) — HackerRank
Advanced Prompt Engineering Techniques — LinkedIn Learning

"Building systems that scale — from microservices to AI-powered automation."

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