Hello, I'm
Sadeq Mozaffari
Full Stack Web Developer
Full Stack Web Developer with more than 5 years of hands-on experience designing, building, and deploying modern web applications. Specialized in the ASP.NET ecosystem, C#, SQL Server, and modern frontend technologies, with a proven track record of delivering business-critical systems across media, healthcare, logistics, and e-commerce industries.
Technical Expertise
A comprehensive set of technologies and tools I use to build modern, scalable applications
ASP.NET Core
Building robust, high-performance RESTful APIs and web applications. Experienced in middleware configuration, dependency injection, authentication/authorization with JWT, and deploying on IIS and Linux.
C#
Deep proficiency in object-oriented programming, LINQ, asynchronous programming, design patterns, and building clean, maintainable backend architectures.
Entity Framework Core
Database modeling, complex LINQ queries, migrations, stored procedures, performance optimization, and implementing repository and unit-of-work patterns.
SQL Server
Database design, writing complex stored procedures and functions, query optimization, indexing strategies, and database performance tuning.
ReactJS
Familiar with component-based architecture, hooks, state management, and REST API integration. Applied in a few projects to build interactive user interfaces.
JavaScript / TypeScript
Strong command of modern JavaScript (ES6+), DOM manipulation, asynchronous programming, event handling, and TypeScript for type-safe development.
HTML5 & CSS3
Semantic markup, accessibility standards, CSS Grid and Flexbox layouts, animations, and pixel-perfect responsive designs.
Tailwind CSS
Rapid UI development with utility-first CSS, custom theme configuration, responsive design, and consistent design systems.
Bootstrap
Responsive layouts, component library utilization, theme customization, and rapid prototyping for enterprise applications.
REST API Design
Designing RESTful APIs following best practices, versioning strategies, HTTP methods, authentication, rate limiting, and API documentation.
Git & GitHub
Version control workflows, branching strategies, pull request reviews, CI/CD integration, and collaborative development.
Dapper
High-performance micro-ORM for .NET. Writing raw SQL queries with object mapping, parameterized queries for security, and achieving optimal data access performance when Entity Framework overhead is unnecessary.
ASP.NET MVC
Extensive experience building web applications with ASP.NET MVC. Proficient in the Model-View-Controller pattern, Razor views, routing, filters, bundling, and building scalable enterprise applications. My primary framework for most professional projects.
Next.js
Familiar with the Next.js framework including server-side rendering (SSR), static site generation (SSG), API routes, and file-based routing. Applied in a couple of projects for SEO-friendly, performant web applications.
Blazor
Familiar with Blazor framework for building interactive web UIs using C# instead of JavaScript. Explored both Blazor Server and Blazor WebAssembly models in a couple of projects.
SEO Optimization
Implementing SEO best practices across all projects — semantic HTML, meta tags, Open Graph, structured data (JSON-LD), sitemap, canonical URLs, performance optimization, and mobile-friendly design to improve search engine visibility.
WordPress
Working with existing WordPress themes — customizing layouts, styling, and functionality to match client requirements. Adapting pre-built themes and integrating content without developing custom plugins from scratch.
IIS & Deployment
Server configuration, SSL management, application deployment, performance monitoring, and maintaining production environments.
Database Design
Designing normalized relational databases, ER diagrams, constraints and relationships, and optimizing database schemas.
Responsive Design
Mobile-first responsive layouts using CSS Grid, Flexbox, and media queries for optimal experience across all devices.
Clean Architecture
Designing layered application architectures with clear separation of concerns — Domain, Application, Infrastructure, and Presentation. Ensuring business logic independence from frameworks, databases, and external services for long-term maintainability.
Domain-Driven Design (DDD)
Applying strategic and tactical DDD patterns — bounded contexts, aggregates, domain events, value objects, and repositories. Modeling complex business domains into maintainable, well-structured software that accurately reflects real-world processes.
CQRS Pattern
Implementing Command Query Responsibility Segregation to separate read and write operations. Using MediatR for in-process messaging and optimizing queries independently for better performance and scalability in complex business applications.
Docker
Containerizing applications with Docker for consistent development and production environments. Writing optimized Dockerfiles, managing multi-container applications with Docker Compose, and streamlining CI/CD pipelines with containerized builds.
HTMX
Building dynamic, modern user interfaces directly from HTML with minimal JavaScript. Leveraging HTMX attributes for AJAX requests, partial page updates, and server-driven interactions — reducing frontend complexity while maintaining rich interactivity.
SignalR & Real-Time
Implementing real-time bidirectional communication between server and clients using SignalR and WebSockets. Building live dashboards, notification systems, and collaborative features with automatic reconnection and scalable hub architecture.
Redis & Caching
Implementing distributed caching strategies with Redis for high-performance data access. Using in-memory caching, output caching, and distributed cache patterns to reduce database load and improve API response times significantly.
Microservices Architecture
Designing and building distributed systems with independently deployable services. Implementing service-to-service communication via REST and message queues, API gateways, service discovery, and handling cross-cutting concerns like logging and monitoring.
Languages
Native speaker with excellent written and verbal communication
Professional working proficiency in reading, writing, and technical communication
Professional Experience
A chronicle of my professional journey and the impact I've delivered across diverse projects
Full Stack Web Developer
Freelance / Self-Employed
Delivering custom web solutions for clients, managing full-cycle development from requirements gathering through deployment and maintenance.
- Built the Digital Library of Afghanistan with online payment, digital book management, and membership.
- Developed Tolo TV Competition Management System with contestant registration and scoring.
- Designed Mohassab Accounting System for accounting, sales, inventory, and warehouse.
- Built Hairatan Border Worker System for cargo weight tracking and payment calculation.
- Developed online examination platforms and hospital management systems.
- Delivered custom WordPress websites for multiple clients.
- Managed deployment, CI/CD, monitoring, and maintenance.
Full Stack Web Developer
Hosh Zareen Technology
Built and maintained production-grade web applications with a focus on scalable frontend and backend services.
- Collaborated with designers and developers to build user-friendly systems.
- Implemented debugging, testing, and performance improvements.
- Maintained and optimized server-side functionality.
Quality Control Specialist
NSIA
Ensuring data quality, accuracy, and integrity for national statistics and information systems.
Data Entry & QC
IECA
Data entry, validation, and quality assurance for electoral data and records.
Web Dev & DB Intern
Appfocus
Assisted in web development and database management tasks, gaining hands-on experience with full-stack workflows.
Featured Projects
Projects that demonstrate my technical capabilities and problem-solving approach
Digital Library of Afghanistan
Bilingual digital library platform with online payment, book management, and membership.
Tolo TV Competition System
Competition management platform for registration, scoring, and results display.
Hospital Management System
Integrated hospital platform for patient records, appointments, and medical data.
Mohassab Accounting System
Complete business management: accounting, sales, inventory, and warehouse.
Hairatan Border Worker System
Cargo worker management at Hairatan border with weight tracking and payment.
Education
Academic foundation that shaped my technical knowledge
Bachelor of Science in Computer Science
Kabul Polytechnic University
High School Diploma
Sayed Ismail Balkhi High School
Get In Touch
Whether you have a project in mind or just want to connect, I'd love to hear from you