Senior Full-Stack Developer

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

We’re hiring aSenior Full-Stack Application Developer (5+ years)who can ship production-grade web applications end-to-end and use modern AI/agentic workflows responsibly (high-signal output, not AI-generated noise).

We specifically want someone who knows how to use AI tools without damaging the codebase:

• Agentic spec-driven development(turn ambiguous asks into crisp specs + acceptance criteria)
• AI coding assistant power user(Claude/Codex or similar)
• Understands how to avoidAI slop(hallucinations, over-abstraction, unreviewable diffs, “works on my machine” code)
• Awareness ofcontext engineering / RPI
• Understandscontext dumb zonesand usesback pressureto prevent runaway complexity
• Strongproblem decomposition(right-size tasks for agents with verifiable outputs)

Front-end Skills:

• Strong UI architecture, component design, state management, and performance optimization
• Strong CSS implementation (Tailwind or equivalent), responsive design, and accessibility basics

Back-end Skills:

• StrongPostgreSQL(schema design, indexing, migrations, query optimization)
• StrongAWSexperience including:
• Security fundamentals (IAM, least privilege, secrets management)
• Storage/queues/services as needed (e.g., S3, SNS/SQS, ECS/Fargate/Lambda, RDS, CloudWatch)

DevOps / Delivery Skills:

• Strong hands-onCI/CD(GitHub Actions/GitLab or similar)
• StrongDockerworkflow (local + production-ready images)
• StrongInfrastructure as Code(Terraform or AWS CDK)
• Strongobservabilityand debugging:
• Logging/monitoring/tracing (CloudWatch,Sentry,OpenTelemetryor similar)
• Ability to build and maintainmulti-tenant SaaSsystems
• StrongRBAC / permissionsimplementation experience
• Writes testable, maintainable code with clean PRs and reliable rollout practices