I will build scalable web apps, ai powered, backend custom ai saas


Level 2
About this gig
Looking for a proven Senior Full-Stack Architect to build a fast, scalable web application or AI-powered platform?
I am a Senior Software Architect & Full-Stack Engineer with 5+ years of production experience in high-scale systems and database architecture.
Key Career Highlights:
- Solo ERP Architecture: Rescued a non-functional and empty repo to ERP codebase at Doart Energy.
- Refactored database and launched a live production ERP single-handedly.
- DevOps & Infrastructure: Migrated a live production Doart Energy ERP to VPS Zero downtime & data loss.
- Teams system implemented for sales agents
- Sales Servey system
- Prices managent
- WhatsApp AI Agent: Built a WhatsApp AI Agent utilizing OpenAI, Anthropic, and Gemini to automate customer support and sales operations.
- CartrustKsa Architecture: User referral system for production Mobile app @CartrustKsa for existing tens of thousands users & new users + Marketplace for existing mobile app solely.
- Performance Engineering: Optimized 8M+ rows MySQL tables @CartrustKsa, slashing peak API response times from 27 seconds to 1 second
Please message me with your project requirements before ordering so we can discuss the technical roadmap!
Get to know Fahad Ullah
Senior Laravel Architect AI Web Engineer
Level 2
- FromPakistan
- Member sinceMay 2021
- Last delivery4 months
Languages
English, Spanish, Arabic, Russian
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Other AI Development Services I Offer
FAQ
Can you work with existing legacy codebases or upgrade them?
Yes. I specialize in refactoring monolithic and legacy architectures, upgrading frameworks, optimizing database queries, and modularizing backends without causing downtime or regressions.
How do you handle AI features like LLMs and custom datasets?
I build robust backend pipelines rather than simple API wrappers. This includes streaming responses, prompt optimization, and RAG architectures using LLMs like Anthropic, OpenAI, Gemini and protect on your proprietary data.
Do you assist with server setup and production deployment?
Yes. I deploy and configure production environments using Nginx, Ubuntu VPS, and automated CI/CD pipelines to ensure your app is secure, SSL-encrypted, and configured for zero-downtime scaling.

