Reliable Engineering for Mission-Critical FinTech & Banking
Rooted in an ITU Computer Engineering background with 8+ years of hands-on banking experience; engineering tailored, secure, and compliant architectures across core banking, instant payments, open banking, and applied AI.
Financial Environments & Integrations Shaped by Our Experience
End-to-End Enterprise Software Services
Designing financial products from the ground up, modernizing legacy foundations, and ensuring seamless mission-critical execution.
Banking & FinTech Engineering
Core banking systems, treasury operations, FAST, EFT, and SWIFT integrations designed for fault-tolerant and compliant financial operations.
- FAST, EFT & SWIFT (MT103/MT202)
- Spot, Swap, Forward & Repo Operations
- BKM SIPER Fraud Prevention Integration
Open Banking & Regulatory Compliance
Regulatory-compliant open banking architectures (PSD2 / Central Bank / BKM) with robust consent management and payment initiation flows.
- BKM Open Banking API Standards
- Payment Consent Lifecycle Management
- OAuth2 & mTLS Mutual Security
Distributed Architecture & Microservices
High-throughput, event-driven architectures running on Java 21, Spring Boot, and Kafka, resilient to extreme transaction spikes.
- Kafka, RabbitMQ & IBM MQ Messaging
- Kubernetes & Container Orchestration
- Strict Test Discipline (JUnit & Mockito)
AI-Driven Financial Forecasting
Production-grade machine learning models for cash flow and seasonal financing forecasting, accelerated 50x using GPU infrastructure.
- Supply Chain Finance Forecasting
- TensorFlow & XGBoost Modeling
- 50x Inference Speedup via GPU
Featured Case Studies
Proven engineering results across banking and FinTech platforms where zero downtime and extreme precision are non-negotiable.
BKM SIPER Fraud Detection & Notification Integration
End-to-end integration with the Turkish Interbank Card Center (BKM) SIPER platform for real-time fraud monitoring and suspicious account checks.
PSD2 & BKM Open Banking Payment Consent Platform
Scalable event-driven consent management and recurring payment platform integrated directly with core banking architectures via Apache Kafka.
GPU-Accelerated Forecasting in Supply Chain Finance
Machine learning models designed for seasonal financing demand and invoice discounting, accelerated 50x on enterprise GPU clusters.
Built on Solid Engineering Foundations
Industry-recognized languages, enterprise frameworks, and infrastructure tools ensuring maximum reliability and elastic scalability.
The Right Partner for Financial Systems
Developing software for banking and financial institutions demands a level of discipline unlike ordinary web development. We bring extensive hands-on experience in data consistency, regulatory compliance, seamless clearing, and fault-tolerant architectures.
Compliance & Security by Design
BKM Open Banking, FAST, SIPER, and central banking mandates are embedded into the heart of software design.
Rigorous Testing & Quality Assurance
Test-Driven Development (TDD) principles and high test coverage catch regressions before they ever hit production.
Resilient Distributed Queuing
Kafka and RabbitMQ asynchronous messaging systems ensure smooth execution even under peak transaction waves.
Yahya Ceylani
Founder & Senior Software Architect
Istanbul Technical University (ITU) Comp. Eng.
"At YHY Software, our mission is not just to deliver working code, but to provide clean, maintainable, and audit-ready architectures that your teams can grow with confidence."
Let Us Elevate Your Financial Infrastructure
Whether you are launching a core banking module, scaling open banking, integrating fraud defenses, or exploring GPU AI forecasting, we are ready to assist.