Senior Full-Stack Engineer - AI-Driven End-to-End SaaS

DevDefy; Karachi Division; On-site; PKR 4,500,000 - 7,500,000; Full time

Job summary

DevDefy is hiring a Senior Full-Stack Application Developer with 5+ years of experience to ship production-grade web applications end-to-end and to apply modern AI/agentic workflows responsibly. You will use AI tools without harming the codebase, drive spec-driven development, and build robust front-end and back-end systems with PostgreSQL, AWS, Docker, Terraform, and strong observability.

This hands-on role demands careful problem decomposition, clean PRs, and collaboration across product and

Qualifications

• 5+ years of senior full-stack experience.
• Ability to ship production-grade web apps end-to-end.
• Experience with AI tooling in software development.
• Strong UI/UX architecture and performance mindset.

Responsibilities

• Build and maintain scalable SaaS web applications end-to-end.
• Incorporate AI tools safely without degrading code quality.
• Design and optimize PostgreSQL schemas with indexing and migrations.
• Ensure observability, security, and reliable deployments.

Skills

Full-Stack development

AI tooling

Frontend architecture

Backend design

Problem decomposition

Tools

PostgreSQL

AWS

Docker

Terraform

OpenTelemetry

GitHub Actions

Job description

DevDefy is hiring a Senior Full-Stack Application Developer with 5+ years of experience to ship production-grade web applications end-to-end and to apply modern AI/agentic workflows responsibly. You will use AI tools without harming the codebase, drive spec-driven development, and build robust front-end and back-end systems with PostgreSQL, AWS, Docker, Terraform, and strong observability.

This hands-on role demands careful problem decomposition, clean PRs, and collaboration across product and