Index — Muhammad Rehan · Karachi 24.86°N 67.00°E
Full-stack engineer building AI-native products for commerce.
I'm Muhammad Rehan, Co-Founder & CTO at Assosiatix. I own products end to end — NestJS and Next.js backends, Shopify apps and AI pipelines that run in production.
01 — Selected work
Three systems, built end to end.
Full case studies: the problem, the architecture, and the technical challenges that actually cost time.
- 01
JAIM Ad Co-Pilot
AI-Powered Shopify Marketing & Ad Automation SaaS
Built a complete AI-powered Shopify marketing SaaS. Store owners connect their shop, and the platform generates AI ad creatives and 30-second video ads, writes niche-specific copy, and launches campaigns on Facebook/Meta and TikTok — with a built-in UGC creator marketplace, Stripe Connect payouts, and real-time chat.
- Category
- AI-Native SaaS · Shopify Ad Automation · UGC Marketplace
- At a glance
- 120+ API endpoints · 4 coordinated apps · 8 months solo
- 02
SeamlessApply
AI-Powered Bulk Job Application Platform
Built a full-stack AI-powered job application automation platform that scrapes jobs from Indeed, LinkedIn, Workday, and Remote — then uses GPT-4 to auto-fill application forms, generate personalized cover emails, and apply to hundreds of jobs on autopilot. Includes a Chrome extension, cron automation, and an admin dashboard.
- Category
- AI Automation · Browser Extension · Job Automation
- At a glance
- 4 job boards · Chrome extension · unattended cron
- 03
CRM AI Sales Automation Platform
Pipedrive + OpenAI GPT-4 Integration
AI-powered system that automatically identifies 50,000+ inactive CRM contacts and sends them personalized follow-up emails — fully automated, daily, without human intervention.
- Category
- AI Integration · CRM Automation
- At a glance
- 50,000+ CRM contacts · GPT-4 · daily automation
02 — Areas of engineering
What I'm brought in for.
- 01
Product architecture
Whole systems, not single screens — four coordinated applications behind one product, with the data model and auth that hold them together.
- 02
AI in production
Text, image, video and vector models wired into real pipelines: fallback chains, safety-filter handling and defences against unpredictable model output.
- 03
Integrations & payments
Shopify, Meta and TikTok Ads, Pipedrive, Stripe Connect. Pagination, rate limits, retries and idempotency done properly.
- 04
Infrastructure
VPS deployment with Nginx, PM2 and Docker; PostgreSQL and Redis; queues and cron that stay up unattended.
03 — Currently
Co-Founder & CTO, Assosiatix.
Assosiatix is a Karachi technology company building commerce solutions, AI-powered products and Shopify applications. I lead product strategy and architecture, and write much of the code.