Backend Developer

Hexa Synergy; Islamabad; On-site; PKR 1,800,000 - 3,200,000; Full time

Job summary

Hexa Synergy in Islamabad, Pakistan is seeking a Backend Developer to design and maintain the server-side engines powering multi-tenant platforms and on-demand applications.

You will implement scalable RESTful APIs with Node.js, Express, and TypeScript, model relational and document databases, and ensure secure authentication and RBAC across services. You will also work with real-time messaging (WebSockets) and integrate payment gateways and background jobs.

Qualifications

• Strong backend development experience with Node.js, Express.js, and TypeScript.
• Experience designing schemas and optimizing queries in PostgreSQL and MongoDB.
• Solid understanding of REST API design, JWT authentication, and security best practices.
• Experience with Git, Linux environments, and API documentation/testing tools.
• Ability to diagnose performance bottlenecks and write reliable server logic.

Responsibilities

• Design, build, and maintain scalable RESTful APIs and backend services using Node.js, Express, and TypeScript.
• Model efficient relational and document database schemas in PostgreSQL and MongoDB.
• Implement secure authentication, authorization, and multi-tenant RBAC.
• Build real-time communication and event pipelines using Socket.io / WebSockets.
• Integrate payment gateways (e.g., Stripe), email/SMS notification services, and background job queues.
• Write maintainable code with strong error handling, input validation, and query optimization.

Skills

REST API design

JWT authentication

RBAC

Git

Linux

Tools

Node.js

Express.js

TypeScript

PostgreSQL

MongoDB

Socket.io

WebSockets

Stripe

Job description

Architect secure APIs, relational and NoSQL database schemas, and real-time backend services using Node.js, TypeScript, PostgreSQL, and MongoDB.

Engineering Islamabad, Pakistan Full-Time Mid-Level (2+ Years)

Role Overview

As a Backend Developer at Hexa Synergy, you will design and maintain the server-side engines powering our multi-tenant platforms, booking systems, and on-demand applications. You will focus on data integrity, API performance, authentication security, and reliable third-party integrations.

Responsibilities

• Design, build, and maintain scalable RESTful APIs and backend services using Node.js, Express, and TypeScript.
• Model efficient relational and document database schemas in PostgreSQL and MongoDB.
• Implement secure authentication, authorization, and multi-tenant role-based access control (RBAC).
• Build real-time communication and event pipelines using Socket.io / WebSockets.
• Integrate payment gateways (e.g., Stripe), email/SMS notification services, and background job queues.
• Write maintainable code with strong error handling, input validation, and query optimization.

Requirements

• Strong backend development experience with Node.js, Express.js, and TypeScript.
• Practical experience designing schemas and optimizing queries in PostgreSQL and/or MongoDB.
• Solid understanding of REST API design principles, JWT/session authentication, and security best practices.
• Experience working with Git, Linux environments, and API documentation/testing tools.
• Ability to diagnose performance bottlenecks and write reliable, predictable server logic.

Nice-to-Have Skills

• Experience with multi-tenant SaaS data isolation and double-entry financial ledger logic.
• Familiarity with Docker containerization and cloud deployment workflows.
• Experience with WebSockets (Socket.io) for live location or chat systems.
• Knowledge of caching strategies (Redis) and automated testing frameworks.