👋

My name is Karim. I'm a Backend Technical Lead and Full-Stack Developer with 4+ years of experience building enterprise-grade systems. I specialise in ASP.NET Core, PostgreSQL & Next.js.

About me

I’m a Backend Technical Lead and Full-Stack Developer with over four years of experience designing and scaling enterprise-grade applications in ASP.NET Core, C#, PostgreSQL, and SQL Server. My work centres on microservice architectures, secure RESTful APIs, and CI/CD pipelines — built on Clean Architecture, DDD, and a bias toward systems that stay maintainable as they grow.

At Nawaah Company I lead backend development: architecting distributed services, owning authentication and authorization (JWT, refresh tokens, RBAC), tuning PostgreSQL query and indexing strategies, and improving reliability through distributed tracing, centralized logging, and health checks. I also mentor developers and set the architecture and code-review standards the team works to.

Across e-commerce, education technology, and SaaS, I’ve led a legacy PHP/MySQL platform through a phased migration to service-oriented Laravel and ASP.NET Core — collapsing a 450-table schema into roughly 110 optimized PostgreSQL tables. Outside the backend, I work comfortably in React, Next.js, Angular, and Flutter. I hold a BS in Computer Science and I’m always looking for the next hard system to build.

My projects

Securecy

Security Operations Platform

Real-time alarm response dispatching with GPS tracking, time-on-site verification, and photo-verified incident logs. I led the backend modernization of a legacy PHP/MySQL monolith — migrating it to service-oriented Laravel and ASP.NET Core applications and reducing a 450-table MySQL schema down to roughly 110 optimized PostgreSQL tables without losing business functionality or data integrity.

450 → 110 tables after schema redesign
Four isolated environments with automated 24h data refresh
MySQL → PostgreSQL replication and synchronization

ASP.NET Core
Laravel
PostgreSQL
CI/CD

securecy.com

Ilim ve Irfan

Education & School Management System

Online learning and school management platform for students, teachers, and administrators across multiple branches. I designed the PostgreSQL schemas with Row-Level Security to enforce tenant isolation, built fine-grained RBAC for dynamic feature access per role and branch, and delivered the secure REST APIs consumed by the Next.js web app and Flutter mobile clients.

Row-Level Security for multi-branch tenant isolation
Dynamic RBAC across roles and branches
Courses, scheduling, attendance, and progress tracking

ASP.NET Core
PostgreSQL
Next.js
Flutter

Private client project

Dine.ai

Restaurant Ordering Platform

Client ordering and admin management system covering dynamic menus, carts, and the full order lifecycle. I designed the data models and API workflows, wired Supabase authentication, RLS policies, and realtime subscriptions for secure multi-role access, and integrated AI chatbot workflows to assist customers through ordering.

Realtime order status transitions
Supabase RLS policies for multi-role access
AI chatbot integrated into the ordering flow

Supabase
PostgreSQL
Realtime
AI Chatbot

dineai.nawaah.org

Fyuze

Influencer Marketing AI Platform

AI-powered influencer discovery and validation system. I built the backend services that process real-time scraped influencer datasets — normalizing, validating, deduplicating, and scoring profiles — and designed the database structures behind large-scale profile indexing and search filtering.

AI agent workflows automate influencer qualification
Deduplication and scoring pipelines
Backend caching for faster search responses

PostgreSQL
AI Agents
REST APIs
Caching

Private client project

Yaghi Store

E-Commerce Platform

A Lebanese commerce platform with full management capability. I designed the backend architecture behind products, inventory, orders, payments, shipping workflows, and promotions, exposed secure REST APIs for the web and mobile storefronts, and managed deployment on Supabase with policy-based data access.

Role-based authorization and admin operations
Inventory synchronization across channels
Optimized product search and query performance

React
Flutter
Supabase
REST APIs

yaghistore.com

Madina Link

Subscription & Utility Management

Water, electricity, and internet subscription tracking built on ASP.NET Core, EF Core, and SQL Server / PostgreSQL. I designed the APIs for billing cycles, usage analytics, payment status, and notification workflows, and implemented secure access control separating customers, field operators, and administrators.

40% faster queries via shaping, indexing, and split queries
Subscription lifecycle and consumption tracking
Modular architecture for maintainability

ASP.NET Core
EF Core
SQL Server
PostgreSQL

Private client project

Hascointl

Corporate Site & Dashboard

An Angular frontend paired with a Strapi headless CMS for secure, scalable content management. I delivered it end to end — building the UI, wiring the backend, and handling hosting and domain configuration through to production.

Angular frontend with engaging UI/UX
Strapi headless CMS backend
End-to-end production deployment

Angular
Strapi
TypeScript
Deployment

hasco-intl.com.au

My skills

Backend

ASP.NET Core
C#
Entity Framework Core
Laravel
REST API Design
Microservices
Clean Architecture
Domain-Driven Design
JWT & RBAC
OpenAPI / Swagger
Unit & Integration Testing
Background Jobs

Frontend

React
Next.js
Angular
Flutter
TypeScript
JavaScript
Tailwind
SCSS

Database

PostgreSQL
SQL Server
Supabase
Firebase
Query Optimization
Indexing Strategies
Row-Level Security
Multi-Tenant Design
Database Migration
Replication & Sync

DevOps & Cloud

Azure DevOps
CI/CD Pipelines
GitHub Actions
Git
Docker
Nginx
IIS
Linux Administration
Monitoring & Logging
Distributed Tracing

My experience

Bachelor in Computer Science

City University

Studied computer science fundamentals — data structures, algorithms, databases, and software engineering — alongside working professionally as a developer.

Graduated

Junior Full-Stack Web Developer

Coding for While

Built responsive web interfaces in Angular with reusable components and services, integrated real-time features with Firebase, and contributed to UI/UX discussions, code reviews, and frontend performance work in an Agile team.

Jan 2023 – Feb 2024

Full-Stack Web Developer

Nawaah Company

Oversaw frontend architecture for multiple web apps in React, Angular, and Next.js, handled backend development on Supabase, and implemented CI/CD pipelines on Azure DevOps. Mentored junior developers on React, TypeScript, and clean code, and drove performance work that cut load times and raised Lighthouse scores.

Feb 2024 – Jan 2025

Backend Technical Lead / Senior .NET Developer

Nawaah Company

Architect and maintain microservice-based backends in ASP.NET Core and PostgreSQL using Clean Architecture, DDD, and Onion Architecture. I own authentication and authorization (JWT, refresh tokens, RBAC), backend security practices, observability through distributed tracing and centralized logging, and deployment automation on Azure DevOps — while leading the backend team, mentoring developers, and enforcing architecture and code-review standards.

Jan 2025 – Present

Contact me

Please contact me directly at karim_baba2022@outlook.com or :