Team Lead · India · Open to Remote

I build & lead teams that ship entire platforms.

8+ years across Python, PHP, React, Node and Flutter. Most recently led engineering at PartyWitty, India's party-booking platform, delivering across four product surfaces and the Linux infrastructure underneath them.

See what I've shipped Download Resume

Python ◆PHP ◆TypeScript ◆React ◆Next.js ◆Flutter ◆Node.js ◆CodeIgniter ◆Django ◆MySQL ◆Elasticsearch ◆Ollama ◆OpenAI ◆AssemblyAI ◆Razorpay ◆Stripe ◆Cloudflare ◆Linux ◆Docker ◆GCP ◆AWS ◆Python ◆PHP ◆TypeScript ◆React ◆Next.js ◆Flutter ◆Node.js ◆CodeIgniter ◆Django ◆MySQL ◆Elasticsearch ◆Ollama ◆OpenAI ◆AssemblyAI ◆Razorpay ◆Stripe ◆Cloudflare ◆Linux ◆Docker ◆GCP ◆AWS ◆

Years of engineering

Full-stack, AI and Linux infrastructure since 2018

10+

Platform repositories

Web, mobile, admin, partner and infrastructure

87%

Of core backend authored

~75 controllers owned end to end

Payment gateways unified

Razorpay · Paytm · Stripe · Easebuzz

24M+

Records at scale

Bulk CRM operations engineered at Nablasol

95%

AI extraction accuracy

OCR and GPT-4 document pipelines

Experience

Eight years, three chapters

Where and when. The work itself lives below.

PartyWitty

Team Lead

Mar 2026 - Jun 2026·India·Full-time

Nablasol

Software Developer (AI / Full-Stack)

Feb 2022 - Feb 2026·New Delhi, India·Full-time

Quantum Leap

Full Stack Developer

Jun 2018 - Feb 2022·Bengaluru, India·Full-time

Work that shipped

Pulled out of three roles and four years of production. Not a job history, but the actual engineering, organized by what it does.

Payment Systems & Transaction Engines

Four gateways, one checkout, atomic settlement

Razorpay, Paytm, Stripe and Easebuzz unified behind a single checkout-and-verify flow. Rebuilt the deprecated Paytm server-to-server webhook, made payout settlement atomic across every transaction table, and enforced PartyWittyPay's co-funding wallet at the API layer across both Node and PHP.

RazorpayPaytmStripeEasebuzzCodeIgniter 4Node.js

gateways, one checkout

87%

of backend commits owned

75+

controllers owned

AI Pipelines & Document Intelligence

Every call transcribed, every document parsed

An async call-intelligence pipeline transcribes every recorded call with AssemblyAI, summarizes it with a self-hosted Ollama model, and emails leadership a per-agent morning digest, production-hardened through a 34-item checklist of retry semantics, locking and backfills. The same pattern powers OCR plus GPT-4 extraction at 95% accuracy and a WhatsApp concierge shipped solo in a single day.

AssemblyAIOllamaOpenAI / GPT-4WhisperDify AIPython

AI surfaces shipped

95%

extraction accuracy

100%

calls auto-summarized

Multi-Surface Product Engineering

React web, Flutter super-app, one identity

Became the through-line across a React web app, a Flutter super-app and three backends that each handled identity their own way. Consolidated group, table, event and carnival bookings into a single card architecture, hardened customer identity with shared JWT sessions across React, Node and PHP, and split the Flutter super-app into secure feature repos so external contributors ship safely.

ReactNext.jsFlutterJWTNode.jsTypeScript

product boards led

197

React app commits

80+

endpoints refactored

Infrastructure, Security & Reliability

Forty-six hardening items, zero downtime

Built the platform's missing safety layers in deliberate order. Recovery first: a solo-built MySQL backup platform with AES-256-GCM encrypted dumps streamed to Cloudflare R2, TOTP MFA, tiered retention and one-click restore. Then the perimeter: a week-long, 46-item security overhaul spanning global route middleware, centralized CORS, app-secret validation and a split-domain architecture, engineered so payment webhooks and all 16 cron jobs kept running without a single interruption.

LinuxApacheCloudflare R2AES-256-GCMPritunl VPNCertbot

46/46

hardening items closed

downtime incidents

exposed ports closed

Data Engineering at Scale

Twenty-four million records, searchable

High-volume data engineering across millions of records: an Elasticsearch-based PDF search over ten-thousand-plus documents with forty-percent faster retrieval, a 1.5M-record migration with zero loss, server-timeout cuts of 47% and async helpers enabling bulk operations across 24M records, with CRM workflows automated through SugarCRM logic hooks and Apache Airflow DAGs.

ElasticsearchApache AirflowSugarCRMMySQLGCPAWS

24M

records processed

40%

faster retrieval

100K+

monthly events at 99.9% uptime

Leadership & Engineering Process

A lead who builds the systems his team runs on

Made process itself an engineering artifact: a Trello-integrated workflow engine built into the admin backend, then ran the team and myself through it, 211 daily status updates across 173 cards in sixteen weeks. Kept an 87% commit share on the backend while reviewing and merging teammate changes, rolled out a company-wide Django HRMS as sole author, and assembled an AI-powered hiring pipeline in a single day.

Code ReviewTrello APIDjangoHiringMentoringSprint Process

48%

of all engineering commits

211

daily updates logged

173

cards delivered

Selected Work

Things I've shipped

Production systems with real users and real stakes, not weekend demos.

Personal ProjectPlatform

SlotItUp

Book any local service, your own platform, end to end

A full-stack appointment-booking and operations platform for salons, spas, barbers, clinics and more. I designed and built the entire system solo: a Flutter customer app on the Play Store, a multi-subdomain Next.js web app serving six personas (customer, partner, employee, inductor, admin, super-admin), and a hardened FastAPI backend on PostgreSQL with Firebase Phone Auth, TOTP MFA, no-show fines, a subscription plus multi-level commission ledger, and role switching shared across subdomains.

FlutterNext.jsFastAPIPostgreSQLFirebaseTOTP MFA

Visit site Play Store

Mobile App

Customer Super-App

One Flutter app for bookings, tables, events and carnivals

A production Flutter super-app, a monorepo of feature packages sharing one shell. Discovery feed, reels, venue and table booking, group and event bookings, bidding flows, a wallet and branded payments, all behind a flavor-driven build pipeline (production, QA, staging, develop) with Melos and FVM for multi-package orchestration.

FlutterDartMelosFVMFirebaseREST

Mobile App

Partner App

The business-owner mobile surface, from bookings to accounting

A production Flutter app for venue owners: table and group-booking management, event creation, cost-to-bid and bid handling, menu management, wallet and accounting, artist hiring, brand setup, subscriptions, reviews and call support. Same flavor-driven Melos monorepo as the customer app, sharing domain and data packages.

FlutterDartMelosFVMFirebaseREST

Platform

PartyWitty Platform

One booking platform, four product surfaces

India's party-booking platform: venue discovery, table & event bookings, group bookings and payouts. I led engineering across the React web app, Flutter customer and partner apps, and the CodeIgniter plus Node backends, authoring nearly half of all engineering commits.

PHPNode.jsReactFlutterMySQLWebSockets

Platform

Unified Payments & Wallet

Four gateways, one checkout

Single payment flow spanning Razorpay, Paytm, Stripe and Easebuzz with wallet co-funding, coupon engine, reward issuance and S2S webhook firewalling, engineered so gateway callbacks bypass the strict API firewall without weakening it.

RazorpayPaytmStripeEasebuzzMySQL

Web App

Encrypted DB Backup System

Sleep-at-night database insurance

Solo-built backup platform: AES-256-GCM encrypted MySQL dumps shipped to Cloudflare R2 with daily/weekly/monthly retention, TOTP-MFA dashboard, one-click restore, audit logs and email health reports.

Node.jsAES-256-GCMCloudflare R2TOTP MFA

Platform

AI Call Intelligence

Every sales call, transcribed and summarized

Call-center pipeline that pulls Smartflo recordings, transcribes them with AssemblyAI, summarizes with a locally-hosted LLM (Ollama), and emails AI-generated daily reports through an async queue with retry workers.

PythonAssemblyAIOllamaPHPCron

Platform

WhatsApp AI Concierge

A bot that actually holds a conversation

WhatsApp bot on Meta Cloud API wired to Dify AI: persistent conversation sessions, message deduplication, per-user queues, typing indicators and full conversation logging to MySQL.

Node.jsMeta Cloud APIDify AIMySQL

Platform

Infrastructure Security Overhaul

46 hardening items, zero downtime

Re-architected the platform's perimeter: VPN-only admin domain, public/partner gateway segmentation, automated SSL via Cloudflare DNS-01, Apache hardening, centralized API firewall with app-secret validation, all while keeping payments and 16 cron automations running.

LinuxApacheCloudflarePritunl VPNCertbot

Capabilities

The full stack, literally

Leadership to Linux: everything needed to take a product from idea to production.

Leadership & Delivery

Team LeadershipCode ReviewSprint / Trello ProcessArchitecture DesignCross-platform CoordinationHiring & Mentoring

Backend

PHP (CodeIgniter 4, Laravel)Python (Flask, Django)Node.js (Express)MySQLREST APIsWebSocketsRedisCron & Queues

Frontend & Mobile

ReactNext.jsFlutter / DartJavaScript / TypeScriptTailwind CSSRedux

AI & ML

OpenAI / GPT-4Ollama (local LLMs)AssemblyAI / WhisperDify AIOCR (EasyOCR, Tesseract)YOLOv8 / OpenCVElasticsearch

Payments & Integrations

RazorpayStripePaytmEasebuzzMeta WhatsApp Cloud APIFCM PushTwilio / MSG91OAuth 2.0 / JWT

Cloud, DevOps & Security

Linux AdministrationCloudflare (DNS, R2, CDN)GCPAWS S3/GlacierApache / NginxVPN (Pritunl)SSL AutomationAES-256 EncryptionTOTP MFADockerCI/CD

Contact

Let's build something worth shipping.

Open to collaborations in AI, automation and platform engineering, and to conversations about leading teams that deliver.

bharatchijay@gmail.com LinkedIn GitHub