Saad ul Hassan
Saad ul Hassan

Senior Full Stack & Applied AI Engineer

Open to offers · Member since 20 Oct 2026
Location
Islamabad, Pakistan
Desired salary
Unspecified
Work preference
Remote Only
Experience level
Senior

About

Professional summary

I am a Senior Full-Stack and Applied AI Engineer with more than eight years of experience building scalable web applications, distributed systems, and production-grade AI products.

I specialize in React, Next.js, TypeScript, Node.js, Python, AWS, microservices, REST and GraphQL APIs, PostgreSQL, and MongoDB. I take ownership of solutions from architecture and implementation through deployment, observability, performance optimization, and operational reliability.

I build practical generative AI capabilities, including LLM workflows, AI agents, RAG pipelines, retrieval systems, tool calling, structured outputs, embeddings, and intelligent automation. My focus is on making AI features dependable through validation, retries, safeguards, fallbacks, and grounded responses.

I have delivered SaaS, marketplace, automation, and enterprise platforms for clients across multiple domains. I am experienced in improving API performance, database efficiency, asynchronous processing, caching, security, and resilience in high-impact production systems.

I also provide technical leadership through system design, architecture decisions, code reviews, mentoring, incident response, release planning, and collaboration with product, QA, UI/UX, and DevOps teams.

Skills

65 capabilities

Tech stack & tools

Working toolkit

Experience

Career history

Senior Full Stack AI Engineer Toptal

I lead architecture and end-to-end delivery for client AI, SaaS, marketplace, and automation platforms. I translate ambiguous requirements into production-ready systems while owning technical strategy, releases, operational reliability, and engineering quality.

I built AI-assisted automation and agentic workflows using OpenAI, retrieval, embeddings, vector search, tool calling, structured JSON outputs, validation, retries, and fallback strategies. These solutions include Sage Intacct automation for Reis Contracting/Agent.Press and data-quality-focused AI capabilities for Local Falcon.

As technical lead for Keys Community and contributor to BookRevs, I work across Next.js, NestJS, PostgreSQL, Redis, RabbitMQ, and AWS. I improve performance and resilience through indexing, caching, query optimization, idempotency, asynchronous processing, observability, and defensive error handling while mentoring distributed engineering teams.

Senior Full Stack Software Engineer Embrace IT

I designed and delivered full-stack web and mobile applications using JavaScript, TypeScript, Python, React, Next.js, React Native, Node.js, NestJS, Express, Django, and Go. I converted business requirements into scalable system specifications and production implementations.

I designed modular microservice architectures with AWS Lambda, Docker, and Kubernetes, optimized PostgreSQL and MongoDB workloads, and improved responsiveness with Redis caching. I also built REST and GraphQL APIs and integrated third-party systems including SAP, Stripe, and external data providers.

I managed cloud deployments across EKS, ECS, ECR, and Fargate; automated pipelines with GitHub Actions and Jenkins; and monitored systems using CloudWatch, Datadog, and Coralogix. I led technical direction, code reviews, mentoring, on-call response, testing strategy, and cross-functional delivery.

Software Engineer / Frontend Lead Saufik

I developed and optimized Projul, an enterprise SaaS product for a US-based construction-management client. I was promoted to Frontend Lead and managed a team of three React developers and a UX designer.

I refactored legacy code into a scalable component-based architecture and improved performance by approximately 80% through lazy loading, React Query, and API-call optimization. I enhanced state management with Redux Toolkit and used Web Workers to improve responsiveness for computationally heavy tasks.

I collaborated with backend engineers on GraphQL and REST integrations and introduced Selenium-based end-to-end testing. My work used React, Redux, Sass, IndexedDB, Git, .NET, and Azure.

Software Engineer Ineffable Devs

I helped develop and launch the beta version of VanGo, a UK transport and manpower-services startup. I built core order booking, payment processing, and user-management functionality for drivers and companies.

I created reusable React components to improve UI consistency and delivery efficiency, integrated Stripe payments, and implemented authentication and authorization with JWT and OAuth. I also migrated key JavaScript features to TypeScript to improve type safety and reduce defects.

I improved frontend performance through code splitting and lazy loading, reducing initial load time by 30% and improving Lighthouse scores. I collaborated with project managers to support agile delivery and milestone tracking.

Education

Learning history

University of Engineering & Technology (UET), Taxila

Bachelor's, Computer Science

GPA: 3.39.

Preston University, Islamabad

Postgraduate Diploma, Cyber Security

GPA: 4.00.

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