SYSTEMS
Hello, I'm
MAAZ SHAIKH
Full-Stack Developer · E-commerce & Automation

I build practical software that connects business operations, automates repetitive workflows, and turns complex requirements into reliable products. Based in Mumbai.

25documented projects & modules
9live tools on HayaTools
365automated tests, DueFlow build 18
7Shopify stores in one analytics hub
performer-core · pipelinedeployed
Shopifycustomers · orders · webhooks
Cloudflare D1audience data
Decision engineshould I send?
Queuesretry · DLQ · caps
WhatsApp / Emailsigned offer links
Attributionlink → order → revenue
Reliable before impressive.
01 — Flagship systems

Work that runs businesses.

Operational software in daily use: marketing automation, ERP, warehouse dispatch, CRM and analytics. Each one is labelled with its real status.

DEPLOYED · ACTIVE DEVMarketing automation · AI decisionsPerformer

A Shopify-connected retention engine that builds audiences, runs WhatsApp and email campaigns, issues private offers through signed links, and attributes revenue back to each campaign.

  • RFM segmentation, frequency caps and suppression
  • Queues with retries and dead-letter handling
  • "Should I send?" decision engine and campaign autopsy
  • Separate, data-isolated deployment per store
TypeScriptCloudflare WorkersD1QueuesShopify APIEngage360
OPERATIONALRetail ERPAden Retail ERP

Inventory, GST billing, accounting and reporting in one system, with invoices delivered automatically on WhatsApp.

Next.js 16PostgreSQLNode workerAWS Lightsail
LIVEWarehouse operationsCutoff & Dispatch

Orders to stickers to QC to dispatch to returns. Shopify and Shiprocket validation, duplicate-scan prevention, and 88-up A4 sticker sheets.

Next.jsShopify APIShiprocketPDF / XLSX
GitHub ↗
OPERATIONAL · WEB IN QAAndroid + web CRMSalesDesk

A native Android CRM that links SIM call activity, recordings, follow-ups and payments to leads, with a web dashboard for managers on a shared serverless API.

KotlinComposeWorkersPostgreSQLR2
GitHub (web) ↗
FUNCTIONALShopify analyticsCommerce Intelligence

Multi-store sales, orders and conversion funnels on one dashboard, with OAuth, resumable sync, timezone-aware reports and data-quality checks.

Next.jsSupabaseGraphQLShopifyQL
Live ↗
More products & case studies
LIVEBrowser utilitiesHayaTools

Nine privacy-first image and PDF tools that run fully in the browser. Files never leave the device.

Next.js 16Canvas APIpdf-lib
tools.hayatech.dev ↗
LIVE · CMS EVOLVINGRetail kioskAden Mall Catalogue

A tablet-first perfume catalogue with store-wise stock, offline caching, a banner CMS and AI fragrance suggestions.

Next.jsD1R2Cloudflare AI
GitHub ↗
MVP · HARDENEDReceivablesDueFlow

"Tally maintains the books. DueFlow maintains the follow-up." A local-first collections workflow with promise-to-pay tracking and re-import reconciliation.

Next.jsDexieZodSheetJS
OPERATIONAL · UATCalling opsCalling Desk

Calling sheets, four-level roles, sheet locking and full audit history for large calling teams.

Next.jsSupabaseTursoExcelJS
PORTFOLIO MVPAI automationLeadOps AI

Gemini-powered lead qualification with confidence scoring, prompt-injection guards and routing to human review.

n8nGeminiDockerWebhooks
GitHub ↗
LIVE STOREFRONTSShopify developmentPerfume Storefronts

Perfume Oil Corner and PerfumeSteal: custom Liquid sections, offer mechanics (B2G1 / B3G2), Shiprocket Checkout and CRO-led layouts, without breaking existing tracking.

LiquidDawnShellaGTM
perfumeoilcorner.com ↗
02 — What I build

More than code.

I start from how your team works today, then build the system that removes the manual steps.

01

Business applications

CRMs, ERP, inventory, attendance, quotations and reporting, with proper auth, roles and database design.

02

Shopify & e-commerce

Custom Liquid themes, checkout integrations, private offers and multi-store data sync.

03

Automation & APIs

Webhooks, queues, cron jobs and integrations that connect Shopify, Shiprocket, WhatsApp and internal tools.

04

AI-assisted workflows

Practical LLM integration with Gemini, n8n and Cloudflare AI: classification, recommendations and human-in-the-loop decisions.

03 — Stack

From wireframe to live.

Tools I have shipped production work with, grouped by layer.

Frontend

Next.js, React, TypeScript, Tailwind CSS, Shopify Liquid, PWA

Backend

Node.js, Cloudflare Workers, Next.js APIs, Fastify, REST, GraphQL, Webhooks

Databases

PostgreSQL, Supabase, Cloudflare D1, Neon, Turso, IndexedDB, Prisma

Cloud & DevOps

Vercel, Netlify, Cloudflare, AWS Lightsail, Docker, GitHub, Wrangler

E-commerce

Shopify Admin API, ShopifyQL, Shopify Flow, Shiprocket, Fastrr

Automation & AI

n8n, Gemini API, Cloudflare AI, Queues, Cron Triggers

Mobile

Kotlin, Jetpack Compose, Flutter, Dart, Android SDK

Tooling

PowerShell, Zod, Dexie, jsPDF, pdf-lib, SheetJS, ExcelJS

04 — Approach

Reliable before impressive.

UnderstandStart from the business problem and how the team actually works.
DesignA practical architecture, then an MVP of the main workflow.
IntegrateAPIs, databases and third-party services, wired safely.
TestEdge cases, regression tests, and protecting what's already in production.
Ship & improveDeploy, monitor, and iterate on real operational feedback.
05 — Your next system

Let's build together.

Running operations on spreadsheets and five disconnected apps? Let's turn that into one system your team actually uses.

Start a conversation →
◆Studiohayatech.dev inLinkedInmohd-maaz-hayatech ⌘GitHubmaazbuilds ⌖Based inMumbai, India
AGENT ACTIVITYLIVE