Backend Engineer: Secure APIs & Real-Time Systems

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

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.