Full-Stack Developer

Arrak Consulting; Karachi Division; On-site; PKR 200,000 - 450,000; Full time

Job summary

Arrak Consulting is seeking a skilled Full Stack Developer with 2+ years of professional experience to build a modern communication platform featuring a WhatsApp-like mobile experience, a web admin/dashboard, and scalable backend services.

You will work on real-time messaging, RBAC-based permissions, and secure communication, using Flutter for mobile, React/Next.js for web, Node.js with TypeScript on the backend, and WebSockets. Collaboration with product/design/QA is expected.

Qualifications

• 2+ years of professional software development experience.
• Strong experience with Flutter (Android & iOS).
• Solid backend experience with Node.js, Express.js, and TypeScript.
• Experience with React.js and/or Next.js.
• Experience with Tailwind CSS and Material UI.
• Understanding of menu-based permissions and RBAC.
• Experience with real-time communication systems.
• Strong understanding of REST APIs, authentication, and authorization.
• Experience working with SQL or NoSQL databases.

Responsibilities

• Front-end development for mobile and web admin dashboards.
• Back-end API development with Node.js/Express and TypeScript.
• Implement RBAC and permission systems; authentication/authorization.
• Develop real-time features using WebSockets/Socket.IO; integrate WebRTC calls.

Skills

Flutter

Node.js

Express.js

TypeScript

React.js

Next.js

Tailwind CSS

Material UI

RBAC

WebSockets

WebRTC

Redis

PostgreSQL

MongoDB

JWT/OAuth

Education

Bachelor's degree in Computer Science

Tools

PostgreSQL

MongoDB

WebSocket/Socket.IO

JWT/OAuth 2.0

Redis

Docker

WebRTC

AWS

GCP

Job description

Job Summary

We are seeking a skilled Full Stack Developer with 2+ years of professional experience to develop a modern communication application. The system includes a WhatsApp like mobile experience, a web based admin/dashboard application, and a scalable backend supporting enterprise features such as Role Based Access Control (RBAC), menu based permissions, real time messaging, and secure communication.

This role is ideal for developers experienced in real-time systems, chat applications, and scalable full-stack architectures.

Role and Responsibilities

Front-end

Back-end

Next.j

Mobile & Web Frontend

• Develop and maintain a cross-platform mobile application using Flutter
• Build web applications and admin dashboards using React.js and Next.js
• Implement UI using Tailwind CSS and Material UI (MUI)
• Implement menu-based permission systems (dynamic menus based on user roles)
• Ensure responsive, accessible, and high-performance user interfaces

Backend & APIs

• Build scalable backend services using Node.js with TypeScript
• Develop REST APIs using Express.js (NestJS preferred)
• Design and implement RBAC (Role-Based Access Control) and permission systems
• Implement authentication and authorization using JWT / OAuth 2.0
• Implement real-time messaging using WebSockets / Socket.IO Communication & Infrastructure
• Integrate voice and video calling using WebRTC or trusted SDKs
• Manage databases such as PostgreSQL and/or MongoDB
• Implement Redis for caching, presence, and real-time state
• Ensure application security, performance, and reliability
• Collaborate with product, design, and QA teams

Required Skills

Required Qualifications

• 2+ years of professional software development experience
• Strong experience with Flutter (Android & iOS)
• Solid backend experience with Node.js, Express.js, and TypeScript
• Experience with React.js and/or Next.js
• Experience with Tailwind CSS and Material UI
• Understanding of menu-based permissions and RBAC
• Experience with real-time communication systems
• Strong understanding of REST APIs, authentication, and authorization
• Experience working with SQL or NoSQL databases

Preferred / Advanced Skills

• Experience building chat or communication applications
• Deep knowledge of RBAC, permission matrices, and access control
• Familiarity with WebRTC (signaling, STUN/TURN)
• Experience using Redis for caching and presence
• Cloud experience (AWS / GCP)
• Docker and basic DevOps knowledge
• Push notification services (FCM / APNs)
• Experience building admin panels or enterprise dashboards