Open to opportunities

Hadeer Ur Rehman

@hadeerurrehman

Message

Java backend engineer building secure, event-driven payment systems for digital transactions.

Pakistan

Message

What I'm looking for

I’m looking for a role where I can build scalable, secure payment/microservices backends using Java and Spring Boot, own production-support improvements, and work with event-driven systems (RabbitMQ/Kafka) in cloud environments.

I’m a Java Backend Engineer with 3+ years of experience building backend systems for digital payments, enterprise integrations, and transaction processing. I focus on scalable microservices, secure REST APIs, and asynchronous, high-throughput architectures—especially in real payment flows aligned to ISO8583/ISO20022.

At Paysys Labs, I develop RAAST instant payment integrations (onboarding, transaction processing, reconciliation) and design RabbitMQ-based event-driven workflows for reliable transaction handling. Before that, at Euronet Pakistan, I supported enterprise payment platforms, modernized legacy systems on IBM AS400 / RPGLE, and handled production support, performance tuning, and client-driven enhancements.

Experience

Work history, roles, and key accomplishments

Current

Associate Software Engineer

Current

Paysys Labs

Oct 2024 - Present (1 year 8 months)

Developing scalable microservices for digital payment systems, including RAAST instant payment onboarding, transaction processing, reconciliation, and secure REST API workflows. Designing event-driven asynchronous processing with RabbitMQ and supporting production deployments and issue resolution in Azure/Kubernetes-aligned environments.

Java Spring Boot REST APIs RabbitMQ SQL Server Microservices Event Driven Architecture Kafka Docker Kubernetes

Associate Application Consultant

Euronet Pakistan

Jan 2023 - Oct 2024 (1 year 9 months)

Supported enterprise credit card product integration and transaction processing, enhancing backend services using Java and SQL Server in integration-heavy financial systems. Performed production support, performance tuning, issue resolution, and modernization efforts for legacy IBM AS400/RPGLE systems and messaging/workflow components.

Java SQL Server AS400 system Transaction Processing Production Support Performance Tuning System Modernization