Open to opportunities

Zeeshan Ilyas User

@zeeshanilyasuser

Message

I build payment platforms, settlement engines, and event-driven .NET microservices for fintech products.

Pakistan

Message

I architect payment infrastructure for Fintechtik, powering Interpay for Emergent Payments Ghana and MojoPay Ghana. I build PSP engines for payment processing, cashout disbursements, merchant settlements, and multi-tenant billing.

I develop .NET microservices, hosted payment APIs, merchant sandboxes, callback processors, and real-time notification services using AWS SQS, API Gateway, Docker, and resilient event-driven patterns. I also deliver admin, support, and reporting portals for transaction auditing and operations.

My work spans payment integrations including GhIPSS, MTN MoMo, MPGS, Paystack, and bank acquirers, alongside PCI-DSS compliance, API load testing, database tuning, and AI-assisted SDLC workflows.

Experience

Work history, roles, and key accomplishments

Current

Technical Lead / Senior Software Engineer

Current

Fintechtik

Mar 2023 - Present (3 years 6 months)

Architected a complete Payment Service Provider (PSP) core engine powering Interpay and MojoPay Ghana products, handling payment processing, cashout disbursements, and automated merchant settlements in .NET 8/10 Core. Developed full-stack administrative platforms and engineered background callback and notification microservices using AWS SQS and Polly resilience policies.

.NET C#.NET Core Microservices Event Driven Architecture API Gateway IHostedService Polly Docker AWS ECS CI CD JMeter Locust Postman PCI DSS Claude Code MCP Cursor

Current

Consultant / Integration Lead

Current

Wasooli.online

Mar 2023 - Present (3 years 6 months)

Provided backend engineering expertise for a merchant payment platform, assisting in transaction flow optimization and API security. Executed OneLink integration workflows, creating reliable payment API contracts and real-time callback mechanisms.

Payment Integration API Security Integration Troubleshooting

Software Engineer

CONNECTdotNET / Qenta Payments

Sep 2020 - Feb 2023 (2 years 5 months)

Built payment microservices in .NET 6 for mobile money channels, bank card acquirers, and payment aggregators. Integrated custom sandbox environments, automated tax collection and risk evaluation logic, and enhanced USSD gateway response speed using Redis and Oracle 19c.

.NET C#Microservices Mobile Money Payment Gateways Redis Oracle 19c E Levy Acuant Fraud Detection

Junior Software Engineer & Trainer

KACS / Hello World

Jul 2019 - Aug 2020 (1 year 1 month)

Developed automated email/SMS alert systems and micro-utilities, and authored optimized SQL scripts and stored procedures. Conducted technical training workshops on C# programming and database optimization.

C#SQL Stored Procedures Training

Software Engineer

IPMO

Developed a web-based educational system serving special education institutions in the Netherlands using C#, ASP.NET Core, and Azure App Services. Created secure API connections to integrate government reporting channels into the platform.

C#ASP.NET Core Azure API Development