Zeiad Khaled
Backend-focused Full Stack Engineer
I build scalable backend systems, secure REST APIs, and production web applications using Node.js, Express, MongoDB, React, and Next.js. Experienced in integrating payment gateways, authentication systems, cloud storage, and third-party services.
- Node.js
- REST APIs
- Backend Architecture
- Production Systems
70+
REST APIs
5+
Delivered Projects
2+
Years Experience
10+
Integrations
Featured Work
Production systems and selected personal projects.
- Node.js
- Express.js
- MongoDB
- Web3.js
- +7
- Node.js
- Express.js
- GraphQL
- MongoDB
- +4
- Node.js
- Express.js
- React.js
- MongoDB
- +4
- Node.js
- Express.js
- TypeScript
- MongoDB
- +4
- Next.js 14
- React.js
- TypeScript
- Tailwind CSS
- +5
NextIn Wallet
Production Web3 Wallet Platform
Sole Backend Engineer
Production-ready Web3 wallet platform integrating blockchain operations, KYC verification, fiat and crypto payments, customer support, and token management.
WallVibe
GraphQL Backend & Content Automation Platform
Backend Developer
Contributed to the backend development of a wallpaper platform by extending an existing GraphQL API, improving content management workflows, automating wallpaper publishing, and deploying the application to a Linux VPS.
ChatBook
AI-Powered Technical Book Platform
Full Stack Developer
Built a full-stack platform that enables users to browse technical books and generate AI-powered summaries by extracting content from PDF files and integrating a transformer-based NLP model.
InstaMenu
Multi-Tenant SaaS Backend for Restaurant Management
Backend Developer
Contributed to transforming an existing restaurant management backend into a scalable multi-tenant SaaS platform by designing tenant isolation, extending REST APIs, implementing authentication, and improving backend architecture.
NextShop
Full-Stack E-Commerce Platform
Full Stack Developer
Built a full-stack e-commerce platform using Next.js and Express.js, featuring product management, authentication, shopping cart workflows, Stripe payments, cloud media storage, and automated invoice generation.
Work Experience
Worked across freelance and production environments, delivering scalable backend systems, modern web applications, and business-focused software solutions.
Backend Engineer
NextIn
2025
Sole backend engineer responsible for designing, developing, and maintaining production backend services for a digital asset platform.
- Designed and maintained 70+ REST APIs.
- Integrated KYC, crypto payments, and third-party services.
- Built secure JWT authentication with RBAC.
- Improved backend performance using indexing and pagination.
Backend Developer
Wallvibe
2024
Extended and maintained backend services for a production application, focusing on GraphQL APIs, data modeling, automation workflows, and deployment.
- Designed and implemented GraphQL APIs and backend services.
- Improved content management workflows and automation processes.
- Deployed and managed production services using Linux VPS, Nginx, and MinIO.
Backend Developer
Instamenu
2024
Enhanced and scaled an existing backend application by introducing multi-tenant architecture and improving authentication.
- Implemented multi-tenant architecture.
- Improved authentication and authorization.
- Extended REST APIs and optimized backend logic.
Freelance Developer
Mostaql & Upwork
2023 - 2025
Delivered custom web applications for clients across different industries, focusing on performance, responsiveness, and maintainable code.
- Delivered multiple client projects from concept to deployment.
- Maintained 5-star client satisfaction across completed projects.
- Improved website performance and user experience through optimization.
Engineering Focus
Focused on building reliable backend systems, scalable applications, and production-ready software solutions.
Backend Engineering
Designing scalable APIs, database architectures, authentication systems, and production backend services.
Full-stack Development
Building complete applications by connecting modern frontend interfaces with reliable backend systems.
System Integration
Integrating payments, KYC, OAuth, cloud storage, and third-party APIs into production applications.
Production & Infrastructure
Deploying and maintaining production applications, managing servers, storage solutions, and improving system reliability.
Technologies
Core technologies and tools I use to design, build, integrate, and deploy production-ready applications.
Backend
Node.js, Express.js, REST APIs, GraphQL, API Design, JWT Authentication, RBAC
Databases
MongoDB, PostgreSQL, Database Modeling, Indexing, Aggregation, PaginationIntegrations
Stripe, Braintree, Onfido, Cloudinary, OAuth, Web3 Integrations, Nodemailer
Infrastructure & Tools
Git, GitHub, MinIO, AWS S3, VPS Deployment, Server Management
Frontend
React.js, Next.js, TypeScript, Tailwind CSS, Styled Components