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Skills

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

Skill evidence

Mongoose

Supported by 4 projects and 2 professional roles 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

TalendIT

Freelance Developer · Oct 2023 - Nov 2023

Built school information interfaces, Google Drive admission-document storage, and survey APIs with separate definitions, templates, and completed records. Co-developed a PHP/MariaDB catalog and administration project.

More about this engagement

Built Next.js and React school pages for admissions, notices, routines, results, staff, and galleries, with responsive navigation, Swiper galleries, and a Google Maps integration. The frontend uses local sample content and an in-memory admin demonstration. In the school backend, implemented Google Drive file handling and stored admission-document identifiers and links in MongoDB. Separated controllers, persistence services, and Joi input validation. Built Mongoose survey CRUD services, keeping survey definitions, reusable templates, and completed school/location records separate. Co-developed TechnoFire's PHP, MySQLi, and MariaDB catalog and administration codebase with Abid Hasan Piash; individual ownership of its features is not established. These repositories document prototypes and implementation scope, not verified production deployment.

  • JavaScript
  • Next.js
  • React
  • Tailwind CSS
  • Swiper
  • Google Maps API
  • Google Drive API
  • Node.js
  • Express.js
  • MongoDB
  • Mongoose
  • Joi
  • PHP
  • MariaDB
  • MySQLi
  • Bootstrap

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

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

Preview not publicly available

This professional project is documented without a public screenshot.

api

Survey Module Backend

An Express and Mongoose API prototype for school-dropout research, separating surveys, templates, and completed survey records alongside user, role, permission, and authentication modules.

Client: TalendIT · View client experience

  • surveys
  • education-research
  • rest-api
  • data-modeling

website

Project Management

A collaborative project-management application with React dashboards for tasks, subtasks, bugs, discussions, members, and project progress. Montasim contributed frontend development and responsive Tailwind CSS interfaces.

  • project-management
  • team-collaboration
  • task-management
  • frontend