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Skills

Technologies, platforms, and working practices used across product engineering, real-time systems, and cloud delivery.

Skill evidence

Zod

Supported by 17 projects and 1 professional role in this portfolio.

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Professional experience

WaTheta

Freelance Developer · May 2026 - Jun 2026

Developed messaging backend features for a customer lifecycle management platform, including Meta integrations, conversation automation and routing, WhatsApp coexistence, and real-time inbox events.

More about this engagement

Contributed to the CLM API messaging backend with WhatsApp, Messenger, and Instagram integrations. Implemented inbound event handling and deduplication, keyword-based automation, and agent assignment by skill, department, and priority. Added durable WhatsApp coexistence storage, history synchronization, quoted replies, and conversation SLA timers. Implemented presence and typing events with conversation access checks, and added unit and end-to-end test coverage. The available repository records 47 authored commits from 28 May to 10 June 2026 (UTC+6); these dates describe the verified contribution window rather than contractual employment dates.

  • Meta Graph API
  • WhatsApp Cloud API
  • Messenger API
  • Instagram API
  • Meta Conversions API
  • TypeScript
  • NestJS
  • MongoDB
  • Mongoose
  • Redis
  • BullMQ
  • Socket.IO
  • Zod
  • Jest

Projects

PostCraft interface preview

website

PostCraft

AI-powered social media manager to generate, preview, score, and auto-publish engaging posts for LinkedIn, X, and Facebook using Gemini AI and custom brand guardrails.

  • ai-social-manager
  • content-creation
  • content-creation-automation
  • content-creation-tool
  • post-generator

extension

BugReceipt

Local-first Chrome extension for capturing privacy-filtered console, network, reproduction-step, and visual evidence in a reviewable bug report.

  • browser-extension
  • bug-reporting
  • chrome-extension
  • developer-tools
  • privacy
FormFlow interface preview

website

FormFlow

Bilingual, role-aware platform for institution-owned forms, versioned submission workflows, employee assignments, requester-visible progress, notifications, and audit history.

  • bilingual-forms
  • multi-tenant-saas
  • role-based-access-control
  • submission-tracking
  • tanstack-start
b4joinacompany interface preview

website

b4joinacompany

Research a company before you apply, interview, or accept an offer.

  • career-tools
  • company-research
  • due-diligence
  • employment
  • job-search
DevTools interface preview

tool

DevTools

A comprehensive suite of 30+ free developer tools for formatting, validating, generating, and transforming data. All tools run entirely in your browser.

  • api-request-builder
  • base64-encoder-decoder
  • cors-checker
  • curl-converter
  • developer-tools
Rootstory interface preview

website

Rootstory

A private, local-first family archive for mapping relationships, preserving life details and photographs, and carrying a complete family history between browsers.

  • family-tree
  • genealogy
  • local-first
  • privacy
  • data-portability
Giftbook interface preview

website

Giftbook

A Bangla-first offline-capable PWA for recording family event gifts in the owner's own Google Sheet, with QR-based family sharing, Excel export, and no application server.

  • gift-ledger
  • google-sheets
  • offline-first
  • pwa
  • bangla
Shrnkly interface preview

website

Shrnkly

Multilingual Next.js application for shortening URLs, sharing text, generating QR codes, and viewing basic usage analytics.

  • code-sharing
  • developer-tools
  • link-expiration
  • link-shortener
  • link-tracking
Ramadan Clock interface preview

website

Ramadan Clock

🌙 District-aware Sehri and Iftar schedules for Bangladesh, with PDF exports and protected timetable management. Next.js, PostgreSQL, Prisma.

  • iftar
  • islamic-calendar
  • prayer-times
  • ramadan
  • sehar
Markdown Typing SVG interface preview

tool

Markdown Typing SVG

Generator and cacheable API for customizable animated typing SVGs used in GitHub profiles, README files, and websites.

  • animation
  • generator
  • github-readme
  • nextjs
  • profile-readme
Book Heaven interface preview

website

Book Heaven

Admin Dashboard UI built with Shadcn and Next.js.

  • admin-dashboard
  • book-management
  • nextjs
  • shadcn-ui
  • tailwindcss

Preview not publicly available

This professional project is documented without a public screenshot.

website

Clinical Movement Re-annotation

A clinical review workspace for selecting recorded movement frames, correcting detected key points, lines, and angles, comparing reference guidance, and saving validated measurements.

  • professional-work
  • clinical-workflow
  • movement-analysis
  • human-in-the-loop
  • geometry
Liftuno interface preview

website

Liftuno

A bilingual gym-management platform for Bangladesh that replaces paper ledgers with dependable membership coverage, billing, attendance, receipts, offers, and role-aware operations.

  • client-work
  • gym-management
  • multi-tenant
  • bilingual
  • billing

Preview not publicly available

No public screenshot has been published for this project.

website

Coaching Management

A multi-tenant SaaS platform for coaching institutes to manage academic structure, students, teachers, attendance, payments, expenses, biometric devices, and SMS outreach.

  • client-work
  • education-management
  • multi-tenant
  • rbac
  • biometric-attendance

Preview not publicly available

This professional project is documented without a public screenshot.

api

CLM API

A multi-tenant customer lifecycle management API. Freelance work for WaTheta focused on WhatsApp, Messenger, and Instagram messaging, conversation automation and routing, real-time inbox events, and integration tests.

Client: WaTheta · View client experience

  • customer-lifecycle-management
  • messaging
  • meta-integration
  • webhooks
  • conversation-routing