API Gateway
Authentication + Validation
- JWT verification
- Rate limiting
- Schema guards
2.8ms avg routing
Crafted Like Software
Omar Yassin Sleem
|•Scalability. Reliability. Clean Architecture.
I build backend systems that behave predictably under pressure. The portfolio is intentionally designed as an interactive architecture surface to reflect how I think about APIs, data flow, observability, and delivery.
Deploy Frequency
3.1/day
Avg API Latency
79ms
Critical Incidents
0
Production PipelineHealthy
Gateway
Auth
Orders
Redis
SQL
Events
Metrics
Live Trace
POST /api/orders · gateway=2ms · auth=14ms · service=31ms
Cache hit on products:list · redis=4ms · db=skipped
Event published: OrderCreated · queue-lag=87ms · consumer=healthy
Request Lifecycle Journey
A guided view of how production traffic moves through architecture layers, from API edge to deployment telemetry.
Service Mesh
Bounded contexts + clean architecture
- Order orchestration
- Inventory reservation
- Background workers
99.95% success
Data Layer
SQL + Redis + event logs
- Read cache hydration
- Write-through consistency
- Query optimization
37% query reduction
Deployment
CI/CD + observability
- Blue/green rollout
- Tracing and logs
- Health auto-recovery
4m 40s pipeline
About Me
Learn more about my journey, expertise, and passion for building exceptional software
.NET Backend Developer with 2+ years of experience building scalable RESTful APIs and CMS-based web platforms. Delivered official government websites serving thousands of users using Kentico and Umbraco, and real-world e-commerce solutions with ASP.NET Core, Clean Architecture, and secure authentication. Focused on code quality, performance, and maintainable systems.
Problem Solver: I thrive on solving complex technical challenges and optimizing performance for enterprise-scale applications.
Clean Code Advocate: I follow SOLID principles and Clean Architecture to write maintainable, scalable code.
Continuous Learner: Always exploring new technologies, cloud solutions, and best practices in software engineering.
0yrs
Years of Experience
0
Projects Completed
0
Clients Served
0
Government Platforms
What I'm Passionate About
Backend Excellence
Creating robust, scalable APIs and enterprise solutions with ASP.NET Core and modern architecture patterns.
Cloud & DevOps
Deploying applications to Azure, optimizing infrastructure, and implementing CI/CD pipelines for seamless delivery.
Performance Optimization
Optimizing database queries, implementing caching strategies, and ensuring applications perform at peak efficiency.
Full Stack Development
Building complete solutions from database to UI, combining backend expertise with modern frontend frameworks.
Skills & Expertise
Comprehensive technical expertise across backend, frontend, and cloud technologies
Backend
ASP.NET Core
Expert
C#
Expert
Entity Framework Core
Advanced
REST APIs
Expert
JWT Authentication
Advanced
LINQ
Advanced
MVC Architecture
Advanced
Clean Architecture
Advanced
SOLID Principles
Advanced
Design Patterns
Advanced
OOP
Advanced
Repository Pattern
Advanced
Dependency Injection
Advanced
Frontend
React
Advanced
Next.js
Advanced
TypeScript
Advanced
Tailwind CSS
Advanced
HTML/CSS
Advanced
JavaScript
Advanced
Database
SQL Server
Expert
Query Optimization
Advanced
SQLite
Intermediate
Redis
Intermediate
DevOps
Git
Advanced
Docker
Intermediate
Azure
Intermediate
CI/CD Basics
Intermediate
Tools
AutoMapper
Advanced
Stripe Integration
Intermediate
PayPal Integration
Intermediate
Swagger/OpenAPI
Advanced
Visual Studio
Expert
Postman
Advanced
Kentico 13
Advanced
Experience by Kentico
Advanced
Umbraco 17
Intermediate
Soft Skills
Problem Solving
Expert
Team Collaboration
Advanced
Code Review
Advanced
Communication
Advanced
Technical Documentation
Advanced
Professional Experience
2+ years of expertise in backend development, CMS platforms, and scalable solutions
Current
CMS Developer
Interactive SA
Cairo, Egypt
Jul 2025 - Present
Developed and delivered CMS-based platforms using Experience by Kentico, Kentico 13, and Umbraco 17. Converted designs into reusable components and integrated scalable RESTful APIs.
Delivered RCMC (Royal Commission for Makkah City & Holy Sites) – official government platform serving thousands of users
Built Discover Makkah tourism portal with full CMS integration and content architecture
Developed NITI (National Institute for Industrial Training) portal using Umbraco 17
Designed and integrated scalable RESTful APIs for dynamic content delivery
Collaborated with cross-functional teams to deliver high-quality solutions on tight deadlines
Junior Full-Stack Developer
Modern IT SA
Cairo, Egypt
Oct 2024 - Jul 2025
Designed and developed RESTful APIs using ASP.NET Core and Entity Framework Core for production projects.
Designed and developed RESTful APIs using ASP.NET Core and Entity Framework Core for multiple production projects
Implemented secure JWT authentication and role-based access control (RBAC)
Optimized database queries and application performance, reducing API response times significantly
Applied Clean Architecture and OOP principles to ensure scalable and maintainable codebases
Implemented Redis caching on product endpoints, reducing database load
Featured Projects
Real-world government and enterprise systems — CMS platforms, full-stack applications, frontends and backend services.
Enterprise CMS Platforms
Government & enterprise content management systems built for scale
enterprise-cmsKentico 13Full Stack DeveloperAvailable only inside Saudi Arabia
Royal Commission Digital Platform
Enterprise government platform for public services, media, and content management
Kentico 13ASP.NET CoreSQL ServerCMS Architecture+1 more
Enterprise content management system
Public information portal
Media center and news management
Code
Source Available
enterprise-cmsXperience by KenticoFull Stack DeveloperAvailable only inside Saudi Arabia
Discover Makkah Tourism Experience
Cultural and tourism digital platform showcasing heritage, landmarks, and visitor experiences
Xperience by KenticoASP.NET CoreSQL ServerResponsive Design
Tourism experience showcase
Interactive heritage content
Events and activities calendar
Code
Source Available
enterprise-cmsUmbraco CMSFull Stack DeveloperAvailable only inside Saudi Arabia
NITI Training & Education Platform
Enterprise education and industrial training platform for workforce development
Umbraco CMSASP.NET CoreSQL Server.NET Framework
Course and program management
Training curriculum delivery
News and announcements
Code
Source Available
Full-Stack Applications
End-to-end systems, dashboards and operational platforms
Frontend Projects
Polished frontend experiences and design-focused implementations
APIs & Backend Services
Backend engineering, APIs and scalable services
backendBackend Developer
E-Commerce REST API
Enterprise API with clean architecture, authentication, and payment integration
ASP.NET CoreEntity Framework CoreSQL ServerRedis+3 more
RESTful API design
JWT-based authentication
Role-based authorization
Code
Source Available
Project Highlights
Real-World Impact
All projects are production-ready and deployed for real users. Government platforms serving thousands, enterprise systems powering real operations, and frontend experiences crafted for conversion and usability.
Technical Excellence
Built with Clean Architecture, SOLID principles, and enterprise-grade practices. Projects emphasize CMS expertise, backend engineering, and scalable delivery.
Services I Offer
Comprehensive backend development solutions tailored for businesses and enterprises
Backend Development
Build scalable, secure, and maintainable backend systems using ASP.NET Core and Clean Architecture principles.
RESTful API Design
Microservices Architecture
Database Optimization
Authentication & Security
Performance Tuning
REST API Development
Create powerful APIs with comprehensive documentation, versioning, and enterprise-grade security.
API Design & Documentation
Authentication & Authorization
Rate Limiting & Throttling
Error Handling
Testing & Quality Assurance
Full Stack Web Apps
End-to-end development of modern web applications combining robust backends with beautiful frontends.
Architecture Planning
Frontend Development
Backend Development
Database Design
Deployment & DevOps
Database Design
Expert database architecture and optimization for SQL Server, ensuring performance and reliability.
Schema Design
Query Optimization
Indexing Strategy
Performance Monitoring
Data Migration
Performance Optimization
Improve application speed and reliability through code optimization, caching, and infrastructure tuning.
Code Profiling
Caching Strategy
Database Optimization
API Performance
Load Testing
CMS Development
Build and customize CMS platforms using Kentico, Umbraco, and other enterprise solutions.
CMS Integration
Custom Widgets
Content Architecture
API Integration
Performance Optimization
Interested in working together? Let's discuss your project.
Get In TouchCertifications & Education
Continuous learning and professional development
ASP.NET Development
DEPI (Digital Egypt Pioneers Initiative)
Comprehensive training in ASP.NET Core, REST APIs, and enterprise application development.
Frontend & Cross-Platform Development
Information Technology Institute (ITI)
Full-stack web development training covering React, Next.js, and responsive design principles.
B.Sc. in Computer Science
University of Banha, Egypt
GPA: 3.5 / 4.0. Comprehensive computer science education with focus on software engineering and algorithms.
Continuous Learning Goals
Cloud & Enterprise
Deepening expertise in Azure cloud services, microservices architecture, and enterprise-scale systems design.
Advanced Patterns
Exploring event-driven architecture, CQRS, DDD, and advanced design patterns for complex systems.
Performance Optimization
Mastering database optimization, caching strategies, and system scalability for millions of users.
Leadership & Architecture
Building expertise in technical leadership, solution architecture, and mentoring junior developers.
Let's Work Together
Have a project in mind? Let's discuss how I can help you build exceptional solutions.