CHARBEL MDAWAR / PORTFOLIO
A closer look at the systems, responsibilities, and technical decisions behind the portfolio.
Calling and core business operations have separate backends. This separates live communication concerns from tenant management, CRM, and HR while keeping a shared service-token contract between them. CallX remains in active development.
The contribution spans Spring Boot SSO and payment services alongside Laravel support and ticketing. Kafka events and WebSocket notifications connect platform activity; other Laravel developers integrated their services with the shared SSO.
ERP, CRM, HR, and commerce projects bring different risks: business-rule consistency, branch-level workflows, customer records, and order integrity. The QA work focuses on those journeys and their data, with each project’s role identified below.
03 / Selected work
Systems I have built and validated, spanning backend engineering, customer platforms, and quality assurance.
Multi-tenant SaaS call center platform
A call center platform connecting real-time calling with the customer and organizational workflows behind every conversation.
Spring Boot, LiveKit, and WebRTC power calling, IVR flows, DTMF handling, and live queues. WebSocket/STOMP handles signaling; Firebase Cloud Messaging notifies offline agents.
A separate core backend manages tenants, users, roles, presence, CRM, and HR. Customer timelines automatically capture call activity.
Oracle stores business data, RabbitMQ carries asynchronous events, and Redis supports hot-path data. A Python LiveKit Agent integrates ElevenLabs text-to-speech.
Britrip is a B2B travel platform for agencies and businesses, bringing flights, hotels, and other travel services together. I developed its platform-wide SSO and payment systems with Spring Boot, plus a support and ticketing system with Laravel.
Developed a shared single sign-on system for the whole platform. Kafka served as the central event hub, with WebSocket notifications delivering real-time updates.
Developed the payment system and integrated Network International, Stripe, and Cryptomus to support the platform’s payment workflows.
Built the support and ticketing system in Laravel. Other Laravel backend developers connected their services to the shared SSO system.
Integrated payment providers
A CRM project for Al-Barq Al-Mudee, a Saudi telecommunications retailer offering smart devices, installment programs, and after-sales services.
Built around a catalog of phones, smartwatches, gaming devices, and accessories with product-led browsing.
Presents installment programs designed to make current devices accessible without an upfront payment.
Connects product discovery with support, warranty, maintenance, and direct customer contact.
Al-Ahlam is a Syrian food manufacturer and exporter established in 1974. Its ERP and manufacturing system supports the business and production workflows behind a broad range of food products.
Led validation of ERP and manufacturing workflows for a large food producer.
Focused on business rules across enterprise and production processes.
Validated data integrity to reduce operational risk.
Salaza Group provides hair, beauty, nail, and bridal services through 16 salons across Syria, the UAE, and Iraq. The project covers enterprise, customer, and workforce operations across branches.
Validated multi-branch business workflows across the ERP system.
Tested customer-management and HR workflows supporting salon operations.
Improved release confidence across a network of 16 salons in three countries.
El-Salleh is a Syrian shopping and delivery platform connecting households with everyday essentials through a digital catalog and home delivery.
Tested catalog browsing, cart behavior, and ordering journeys.
Validated store coverage and delivery journeys across the shopping experience.
Focused on protecting order accuracy and providing a more reliable grocery-shopping experience.
GoPal helps families in Saudi Arabia discover and book sports, arts, and educational activities. Child assessments guide recommendations, while STC Qitaf integration enables loyalty-point bookings.
Validated child profiles, activity discovery, and booking workflows.
Tested provider workflows to strengthen reliability for activity centers.
Validated assessment outputs and loyalty integration for a dependable family experience.
A transport booking and service-request platform connecting customer trip journeys with operational workflows.
Tested booking journeys and trip creation across customer-facing features.
Validated service-request journeys across customer and operational workflows.
Focused on reducing release risk in trip creation and customer-facing features.
Crypto trading platform
A Laravel application bringing the platform backend, customer workflows, and web interface together.
Developed the backend with Laravel and built the web interface using reusable Blade templates.
Integrated a cryptocurrency payment method to support payment workflows within the platform.
Implemented CRM functionality to organize customer information and related business activities.
More project details are included in the downloadable CV.
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