M. Saad Khan
Verified Expert in Engineering
Software Engineer and Developer
Lahore, Punjab, Pakistan
Toptal member since April 14, 2026
Saad is a senior back-end-focused full-stack developer with 5+ years of experience building scalable systems using Node.js, NestJS, and GraphQL. He specializes in microservices architecture, performance optimization, and cloud-based solutions on AWS. He has successfully led the migration of large-scale applications from monolith to microservices, ensuring high reliability and scalability.
Portfolio
Experience
- React - 5 years
- Modern JavaScript - 4 years
- REST - 4 years
- Node.js - 4 years
- TypeScript 5 - 3 years
- Next.js - 3 years
- Supabase - 3 years
- NestJS - 2 years
Preferred Environment
React, Next.js, Node.js, NestJS, Agile Product Management, Express.js, JavaScript, MongoDB, PostgreSQL, Microservices
The most amazing...
...achievement I've received was a Team Player Award for consistently collaborating across teams and ensuring smooth, high-quality project deliveries.
Work Experience
Software Engineer
CodingCops
- Led the migration of a monolithic system to microservices architecture using NestJS and GraphQL Federation, improving scalability and reducing inter-module coupling.
- Implemented Redis caching, improving performance and reducing load.
- Improved system observability by integrating logging and monitoring tools (CloudWatch, New Relic), enabling faster debugging and performance tracking.
Software Engineer
thehexaa.ai
- Successfully led and developed various front-end and back-end tasks for client projects using React, ensuring seamless integration and functionality.
- Implemented Binance Smart Chain functions within React applications to facilitate cryptocurrency transactions and blockchain features.
- Integrated Shopify into a Next.js application, enabling streamlined eCommerce functionalities.
Associate Software Engineer
thehexaa.ai
- Revamped the existing Angular codebase of the mySylvan Learning project to React with TypeScript, improving maintainability and performance.
- Worked in a team to build a food subscription platform with weekly meal plans. Integrated Stripe for automatic payments, implemented order and rider tracking, and developed an admin panel for inventory and subscription management.
- Implemented state management using Redux to optimize front-end performance and maintain application scalability.
Associate Front-end Developer
YellowBeamTech
- Optimized page load speed by implementing code splitting, lazy loading, and efficient asset management, resulting in faster user experience and reduced bounce rate.
- Designed and built fully responsive web pages using modern technologies (HTML, CSS, JavaScript, and frameworks like React), ensuring seamless performance across mobile, tablet, and desktop devices.
- Worked closely with designers and backend developers to implement new features, fix bugs, and meet project deadlines, contributing to successful and timely product releases.
- Improved overall user experience by refining UI components, fixing usability issues, and implementing cleaner, more intuitive designs. Identified and resolved front-end issues, leading to a more stable application and fewer user-reported problems.
- Connected front-end applications with RESTful APIs, ensuring smooth data flow and accurate rendering of dynamic content. Built reusable and modular components, reducing development time and improving code maintainability across projects.
Experience
BlockByBlock
In addition, I built a centralized GraphQL gateway to handle authentication, authorization, and service orchestration, enabling secure and efficient communication across services. I improved system performance by implementing Redis-based caching for frequently accessed reference data and optimizing database queries and connection pooling. I handled complex legacy data migration challenges and introduced a dual-write synchronization strategy to maintain consistency between monoliths and microservices during migration.
I also enhanced system reliability and observability by integrating monitoring and logging tools, and collaborated closely with DevOps and QA teams to streamline CI/CD pipelines and ensure smooth production releases with minimal downtime.
Ride Management and Partner Integration Platform
The system was built to handle unreliable 3rd-party APIs by introducing robust error handling, retry mechanisms, and fallback strategies to ensure operational continuity. I also implemented driver and vehicle assignment workflows, enabling real-time updates and seamless coordination between internal systems and partner platforms.
This project required a strong focus on scalability, as the platform was designed to support high volumes of booking requests and concurrent operations while maintaining system reliability. Through careful architectural decisions and efficient API design, the platform now serves as a solid foundation for scaling transportation operations across multiple regions and partners.
Design and Workflow Management Platform for Creative Operations
The platform was designed using clean architecture principles to ensure maintainability and scalability as the system evolved. I implemented dynamic data structures to support flexible workflows and built secure role-based access control mechanisms to enable multi-user collaboration across different permission levels. On the front end, I developed reusable and modular components to ensure consistency and scalability of the user interface.
Performance optimization was a key focus, particularly when handling large datasets and concurrent operations. The system integrates cloud storage for efficient asset handling and provides a seamless experience for managing design resources at scale. Overall, DezynSync significantly improved workflow visibility and operational efficiency by consolidating fragmented processes into a single, structured platform.
Sylvan Learning Platform (Tutoring Marketplace & Scheduling System)
https://signin.mysylvanmarketplaceplus.comARCHITECTURE AND TECHNICAL DESIGN
• Migrated legacy Angular v4 monolithic front end to a modern React-based micro-front-end architecture, splitting into multiple applications: Onboard, Parent, Tutor, and Admin.
• Designed a scalable back-end system with Node.js services and MongoDB, later introducing microservices (report service) for heavy processing workloads.
• Implemented a token-based API access layer enabling external systems to securely consume the platform.
• Built a multi-market, multi-timezone system architecture ensuring global accessibility with accurate scheduling across regions.
• Introduced monorepo architecture for shared component reuse across Parent and Tutor applications, reducing duplication and improving maintainability.
TECH STACK
Back end: Node.js, MongoDB
Front end: React, TypeScript, Vite, Material UI
Infrastructure: Amazon EC2, Nginx, Docker, MongoDB Replica Set
TOOLS
Bitbucket, Jira, Sentry
Education
Bachelor's Degree in Computer Science
COMSATS University Islamabad - Lahore, Pakistan
Skills
Libraries/APIs
React, Node.js, API Development, Back-end APIs, Stripe, OpenAI API, Auth, OpenAPI, REST APIs, Stripe API, Google Maps, Google Maps API, React Testing Library, HubSpot API, QuickBooks API, WebGL, Mapbox GL, Vue, D3.js, FFmpeg, Google Places API, React Query, React Hook Form, Antd, Pusher, Zod, Yup, React DnD, Socket.IO
Tools
GitHub, Claude Code, Google Analytics, Notion API, Astro, Amazon EKS, RabbitMQ, Claude, Figma, ComfyUI, AWS IAM, Auth0, Acumatica, GIS, Sequelize, React Apollo, Git, Prisma, Bitbucket, Slack, Codex, NGINX, Sentry, Webpack, Flyway, AWS Key Management Service (KMS), Amazon Cognito, Amazon Simple Notification Service (SNS), Amazon Simple Queue Service (SQS)
Languages
Modern JavaScript, TypeScript 5, HTML, JavaScript, TypeScript, HTML5, Python, GraphQL, CSS, SQL, Go, Ruby, PHP
Frameworks
Next.js, Tailwind CSS, Express.js, NestJS, Material UI, OAuth 2, Angular, React Native, Redux, JSON Web Tokens (JWT), MUI CSS, Jest, Swagger, Scrapy
Paradigms
REST, UX Design, Marketplace Platforms, Microservices Architecture, Role-based Access Control (RBAC), Microservices, Agile, Code Refactoring, Microfrontends, Back-end Architecture, Database Design, Real-time Systems, UI Design, Agile Product Management, Clean Architecture, Scrum, Dependency Injection, Model Context Protocol (MCP)
Platforms
Web, HubSpot, Firebase, Amazon Web Services (AWS), Vercel, Azure, Mapbox, Docker, Google Cloud Platform (GCP), DigitalOcean, PostHog, AWS Lambda, Apache Kafka, Cloud Native, Visual Studio Code (VS Code), Amazon EC2, MacOS, Linux, Webflow, Zoho CRM, Contentful
Storage
PostgreSQL, MongoDB, NoSQL, MySQL, Amazon S3 (AWS S3), Redis, Relational Databases, Amazon DynamoDB, Data Pipelines, Database Migration, PostGIS, Databases, Object Storage, Cloud Firestore, ClickHouse, IndexedDB
Industry Expertise
Healthcare, Trading Systems
Other
Supabase, API Integration, Full-stack, Full-stack Development, APIs, Third-party APIs, Web Development, System Architecture, Dashboards, Back-end, Payment Gateways, Front-end, eCommerce, Front-end Development, Architecture, Software Architecture, Security, Back-end Development, SaaS, Solution Architecture, Data Visualization, Cloud, Inventory Management, Coding, Code Review, Startups, Order Management, CI/CD Pipelines, Payment APIs, OAuth, AI Tools, Cursor AI, AI Integration, Row-level Security (RLS), Storage, Performance Optimization, API Gateways, Artificial Intelligence (AI), HRIS, Progressive Web Applications (PWAs), Workforce Management (WFM), Cloud Infrastructure, Payroll & Benefits, Infrastructure, Vite, Fintech, Onboarding, Platforms, User Experience (UX), User Interface (UI), Documentation, PWA, Serverless, Webhooks, Payment Processing, Data Transfers, Videos, Amazon Bedrock AgentCore, CRM, HubSpot CRM, Cloudflare, Integration, Modular, Marketplaces, Single Sign-on (SSO), Workflow Automation, Internet of Things (IoT), RESTFul APIs, Attendance Systems, Finance, Code Auditing, 3D Maps, Design Systems, Front-end Architecture, WebSockets, Agentic AI, Application Modernization, Document Processing, PDF, AI Agents, Large Language Models (LLMs), Multi-agent Systems, User Flows, Workflows, AI-generated Code, Performance, Maps, AWS Cloud Architecture, Authentication, Authorization, SaaS Architecture, Minimum Viable Product (MVP), Recommendation Systems, Analytics, Metabase, Charts, Base44, HIPAA, RAG Systems, Leadership, LLM Integration, Web Push Notifications, Stock Market, Technical Leadership, Streaming, GPS, AI-assisted Development, Figma to React, Integrations, Lovable, Workflow, Event-driven Systems, Scalable Architecture, Distributed Systems, Data, Orchestration, API Design, Billing, MVP Design, Data Modeling, Customer Relationship Management (CRM), Reports, Workflow Automation & System Integration, Product Design, Payments, Agentic Coding, Applied AI, Context Engineering, Affiliate Marketing, Affiliate Tracking, Logistics, GraphQL Federation, TypeORM, System Design, Zustand, Bootstrap 5, React Hooks, Supabase Auth, Web Project Management, Sitemaps, ACH Payments, Styled-components, RFQ, Trading, DocuSign, Amazon RDS, Scraping, Telematics, Taxation
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