I’m Youssef, a Senior Software Engineer with expertise in fintech and financial services. I connect payments, lending, subscriptions, and remittance into cohesive systems—from business workflows to production operations.
My work connects the business rules, APIs, and events behind lending and payment journeys.
A customer request reaches business orchestration, integrates with payment services, and feeds downstream reconciliation and notification workflows.
Financial services, banking operations, and healthcare. A selection of the systems I’ve contributed to.
Contributing to BNPL, single-payment financing, and remittance platforms for Kuwait International Bank, with modular services and integrations across the payment lifecycle.
Explore the contributionsDesigned and developed capabilities spanning customer onboarding, merchant management, installment programs, order processing, collections, refunds, settlements, and reconciliation.
Integrated with Subscription Engine, Cube, Lightbox, and tokenization services for recurring collections, transaction processing, card enrollment, and payment credential handling.
Contributed flexible payment and sale-request workflows, automated collections, tenant-specific product configuration, and integration with internal payment services.
Developed and enhanced sender and beneficiary processing, AML and fraud-validation integrations, transaction-state management, asynchronous events, and customer notifications.
A vehicle loan management system connecting bank teams, vehicle providers, insurance companies, and customers.
Implemented CRM capabilities in Dynamics 365, developed backend services and a partner-facing Angular interface for contract management, and led ABP framework implementation for customer after-sales services.
Consumer finance services covering BNPL, cash-out, credit-card loans, and settlements.
Optimized a loan API using multithreading, parallel execution, and code improvements. Built scheduling capabilities with Hangfire, applied Unit of Work for transaction management, and worked on SQL Server indexing and database changes.
*Based on the improvement reported in my resume: processing time reduced to less than half its original duration.
At UAMS Medical Center, built web capabilities for operating-room availability and doctors’ leave, including Active Directory authentication. At CARTI, worked with Mirth to route data between systems. Contributed to patient-data integration and insurance validation for Revixier.
Selected implementation work across financial services.
Improved Keycloak user exports with complete user retrieval, effective permissions, eligibility filtering, and bounded parallel fetching.
Retrieved independent role data concurrently, limited per-user parallel work, and added diagnostic logging around the export flow. Also improved card-range import error handling.
Implemented optimistic concurrency with row versions across financial entities, plus rollback and explicit conflict handling.
Added version checks to payment, order, installment, and customer flows. On a concurrency conflict, the implementation rolls back and clears tracked state before a configured retry or conflict response. Also added tenant identifiers to notification persistence.
Added installment payment-status checks against the payment processor and synchronization of confirmed transactions.
Checked known transaction-reference variants, updated payment state when a paid transaction was found, and improved billing retry selection and BNPL notification behavior.
Hands-on development, integration work, and production problem-solving across four engineering teams.
BNPL, single-payment financing, and remittance platforms. Clean Architecture, DDD, CQRS, payment integrations, Docker deployments, and observability.
Vehicle lending, partner contract management, Dynamics 365 CRM, and customer after-sales services with .NET, Angular, and ABP.
Consumer finance, loan APIs, Hangfire scheduling, database performance, transaction management, and production support.
Healthcare applications, Active Directory integration, clinical data routing, and insurance-validation workflows.
For teams hiring a software engineer and clients building or improving a product.
Backend services and Angular interfaces for business workflows, partner portals, and enterprise applications.
C# · ASP.NET Core · EF Core · Angular · ABPPayment integrations, REST APIs, webhooks, recurring jobs, and asynchronous communication between services.
REST · CQRS · MediatR · Hangfire · MicroservicesInvestigate production issues, optimize APIs and database access, and improve the visibility of system behavior.
SQL Server · Oracle · Docker · Grafana · KibanaClean Architecture / Domain-Driven Design / SOLID / Design Patterns / Unit Testing / Git / Agile
Arabic native speaker. Advanced English.
Based in Egypt.
A clinic and hospital management system for room availability, surgeries, and appointments. ASP.NET Core API, Angular, SQL Server, and EF Core.
Contributed backend functionality to a mobile shipping-service application, completed with an excellent grade.
A board-game application using C#, Windows Forms, SQL Server, and EF Core.
BSc in Computer Science · Sep 2017 – Jul 2021
First Class · GPA 3.50 · Grade 90%
Full Stack .NET Web Internship · Aug – Nov 2021
ASP.NET Core, Entity Framework, SQL Server, JavaScript, and Angular.
Tell me about your team, the challenge, and what you want to achieve.
Youssef.Khaled.Jr92@gmail.com