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Saad ul Hassan

@saadulhassan1

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I build production AI, SaaS, and marketplace platforms from architecture through reliable cloud delivery.

Pakistan

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What I'm looking for

I'm looking to lead and build reliable AI-powered, SaaS, marketplace, or automation products end to end, combining architecture, hands-on engineering, technical mentorship, and operational ownership.

I've led end-to-end delivery of AI, SaaS, marketplace, and automation platforms at Toptal, turning ambiguous requirements into production-ready systems.

For Reis Contracting and Agent.Press, I architected an AI-assisted Sage Intacct automation platform that reduced project processing from about an hour to a few minutes with nearly 99% successful transaction processing. I also productionized LLM workflows, AI agents, RAG pipelines, retrieval, tool calling, structured outputs, validation, and fallbacks for customer-facing AI features.

Across Local Falcon, Keys Community, and BookRevs, I've built AI capabilities, led architecture, improved distributed-system reliability, and delivered marketplace workflows using Next.js, NestJS, PostgreSQL, Redis, RabbitMQ, and AWS.

Previously at Embrace IT, Saufik, and Ineffable Devs, I built full-stack web and mobile products, scaled cloud deployments, integrated APIs and payments, improved performance, and mentored engineers. I bring hands-on technical direction from system design and code reviews through releases, incident response, observability, and continuous improvement.

Experience

Work history, roles, and key accomplishments

Current

Senior Full Stack AI Engineer

Current

Toptal

Aug 2025 - Present (1 year 1 month)

Led architecture and end-to-end delivery across multiple client engagements, building production-grade AI, SaaS, marketplace, and automation platforms. Architected AI-assisted automation for Sage Intacct and productionized multi-step LLM workflows.

AI LLM RAG OpenAI Lang Chain Next.js NestJS PostgreSQL Redis RabbitMQ AWS Microservices Technical Leadership

Senior Full Stack Software Engineer

Embrace IT

May 2022 - Jul 2025 (3 years 2 months)

Designed and developed full-stack web and mobile applications using JavaScript, TypeScript, Python, React, Node.js, and more. Optimized system performance, implemented security controls, and led technical direction and mentoring.

JavaScript TypeScript React Next.js React Native NodeJS NestJS ExpressJS Django Python PostgreSQL MongoDB Redis RabbitMQ Docker Kubernetes AWS GraphQL REST APIs CI CD OAuth JWT

Software Engineer

Saufik

Nov 2021 - Apr 2022 (5 months)

Developed and optimized an enterprise SaaS project for a U.S.-based construction management client. Promoted to Frontend Lead, leading a team of React.js developers and a UX designer, and improved project performance by 80%.

React Redux SASS IndexedDB Git Selenium React Query .NET Azure

Software Engineer

Ineffable Devs

May 2018 - Oct 2021 (3 years 5 months)

Developed and launched the beta version of VanGo, a transport and manpower services startup in the UK. Built core functionalities including order booking, payment processing, and user management, and optimized frontend performance.