Yigit Alp Unal - Developer Portfolio | AI, Fintech/Banking & Blockchain

# Professional Project Portfolio

This portfolio showcases enterprise-grade projects in banking systems, payment processing, fintech solutions, and financial data analysis. Each project demonstrates production-ready architecture and industry best practices for the European banking sector.

Banking Microservices Platform

Enterprise-grade banking platform with 12 microservices demonstrating production-ready architecture. Implements SEPA compliance (ISO 20022), AML/KYC screening, fraud detection with real-time risk scoring, and PSD2 regulatory compliance. Features event-driven architecture with Kafka, SAGA pattern for distributed transactions, and comprehensive observability with ELK stack, Prometheus, and Grafana.

Java 17 Spring Boot Microservices PostgreSQL Kafka Redis SEPA AML/KYC Fraud Detection
github.com/ygtalp/banking-microservices-platform
Mastered enterprise microservices architecture, distributed transaction patterns, and European banking regulations. Demonstrated ability to build scalable, compliant banking systems with 80%+ test coverage and production-grade observability.
Payment Processing Microservice

Production-ready payment processing service with multi-currency support (USD, EUR, GBP, TRY), idempotent transaction handling, and event-driven architecture. Implements optimistic locking for concurrent transaction safety, two-tier caching (Redis + database), complete audit trails, and asynchronous event publishing via RabbitMQ.

Java 17 Spring Boot PostgreSQL RabbitMQ Redis Docker CQRS
github.com/ygtalp/payment-service
Developed expertise in payment processing systems, data consistency patterns, and distributed system design. Implemented enterprise patterns including CQRS, event sourcing, and idempotency for reliable financial transactions.
AI-Powered Fraud Detection System

Machine learning system for banking fraud detection with real-time transaction monitoring, anomaly identification, and pattern recognition. Implements risk scoring algorithms, behavioral analysis, and specialized context protocols for transaction security in banking environments.

Machine Learning Python Fraud Detection Real-time Processing Risk Scoring

Gained expertise in AI-driven security solutions for financial systems. Developed advanced pattern recognition skills and understanding of fraud prevention methodologies in banking sector.
Financial Data Processing & Analytics

Real-time financial data processing pipelines with ETL workflows, market data aggregation, and advanced analytics. Implements data validation, transformation, and visualization for financial reporting and risk analysis.

Python Data Processing ETL Real-time Analytics

Developed strong data engineering skills with focus on financial data workflows. Enhanced ability to build scalable ETL pipelines and real-time processing systems for banking applications.
Algorithmic Trading System

Automated trading system with technical analysis, algorithmic decision-making, and real-time market data integration. Features backtesting capabilities, strategy optimization, and API integration for financial market operations.

Python REST API Algorithm Design Financial Markets

Strengthened algorithmic thinking and API integration skills. Gained experience in building automated systems for financial markets with focus on reliability and data accuracy.
Payment Gateway Integration Solutions

Enterprise payment gateway integrations with Stripe and major card networks (Visa/Mastercard). Developed secure payment processing plugins with PCI-DSS compliance, transaction handling, payment reconciliation, and comprehensive error handling for e-commerce and fintech applications.

Payment Processing Stripe API PCI-DSS Security Integration

Gained hands-on experience with payment gateway APIs, security compliance, and financial transaction workflows. Developed understanding of payment industry standards and secure transaction processing in production environments.
Financial Market Data Integration

Real-time financial market data integration system with automated data collection, processing pipelines, and analysis workflows. Built scalable ETL infrastructure for market data aggregation, validation, and transformation supporting financial decision-making systems.

ETL Pipelines Data Integration Real-time Processing Market Data Automation

Developed advanced ETL and data pipeline engineering skills. Strengthened expertise in building scalable data integration systems for financial services with focus on data quality and real-time processing.

# Coding Books Library

A collection of essential books that have enhanced my technical knowledge and contributed to my professional development in backend engineering, microservices architecture, and financial technology.

Real-World Web Development with .NET 9

Mark J. Price

Modern web development with .NET 9, covering ASP.NET Core, Blazor, and cloud-native applications.

.NET 9 ASP.NET Web Development

C# 13 and .NET 9 – Modern Cross Platform Development

Mark J. Price

Comprehensive guide to modern C# 13 and .NET 9 fundamentals for cross-platform development.

C# 13 .NET 9 Cross-Platform

ASP.NET Core in Action, Third Edition

Andrew Lock

In-depth guide to building production-ready web applications with ASP.NET Core.

ASP.NET Core Web APIs Backend

Microservices Patterns

Chris Richardson

Comprehensive patterns for designing, building, and deploying microservices architectures with Java examples.

Microservices Java Architecture

Building Microservices

Sam Newman

Designing fine-grained systems with microservices architecture, covering decomposition, deployment, and observability.

Microservices Architecture Distributed Systems

Design Patterns

Gang of Four

Classic book on reusable object-oriented design patterns that form the foundation of software architecture.

Design Patterns OOP Architecture

AI for Big Data-Based Engineering Applications

Various Authors

Exploring AI applications in big data engineering with focus on security perspectives and practical implementations.

AI Big Data Security

AI Engineering

Chip Huyen

Building production-ready applications with foundation models, covering ML system design and deployment.

AI ML Engineering Foundation Models

Hands-On APIs For AI And Data Science

Ryan Day

Using Python to build and use APIs for AI, machine learning, and data analytics applications.

APIs Python AI/ML

Hands-On Machine Learning

Aurélien Géron

Practical implementation of machine learning algorithms with scikit-learn, Keras, and TensorFlow.

ML TensorFlow Python

Python for Finance

Yves Hilpisch

Mastering data-driven finance with Python, covering financial algorithms, trading strategies, and risk management.

Python Finance Algorithms

Mastering Blockchain

Imran Bashir

Comprehensive guide on blockchain technology, distributed ledgers, and decentralized applications.

Blockchain Distributed Systems DLT

Clean Code

Robert C. Martin

Principles, patterns, and practices of writing clean, maintainable code that stands the test of time.

Best Practices Software Design Refactoring

Building Algorithmic Trading Systems

Kevin J. Davey

A trader's journey from data mining to Monte Carlo analysis and developing profitable trading systems.

Trading Algorithms Backtesting

Java Programlama Dili ve Yazılım Tasarımı

Altuğ Bilgin Altıntaş

Comprehensive Java programming and software design principles in Turkish, covering object-oriented design and best practices.

Java Software Design OOP

Java Tasarım Şablonları ve Yazılım Mimarileri

Özcan Acar

Design patterns and software architectures in Java, covering enterprise patterns and architectural best practices in Turkish.

Java Design Patterns Architecture

PostgreSQL

Yasin Tatar, Ahmet Fincan

Comprehensive guide to PostgreSQL database management, query optimization, and advanced features in Turkish.

PostgreSQL Database SQL

C: How to Program

Paul Deitel, Harvey Deitel (Turkish Edition)

Classic introduction to C programming fundamentals, data structures, and low-level programming concepts.

C Programming Fundamentals

# Tools & Applications

Professional development stack for building enterprise banking systems, microservices architectures, AI applications, and fintech solutions.

IntelliJ IDEA

IDE

Professional Java IDE with intelligent code assistance, advanced debugging, and integrated testing for enterprise applications.

Primary IDE for Java/Spring Boot microservices development and banking platform projects.

Spring Boot

Framework

Java framework for building production-ready microservices with embedded servers, auto-configuration, and comprehensive ecosystem.

Core framework for building all banking microservices, payment processing, and REST APIs.

Spring Cloud

Microservices

Distributed system patterns for microservices including service discovery, config management, and circuit breakers.

Used for implementing service discovery (Eureka), API Gateway, and distributed configuration in microservices platform.

Maven

Build Tool

Project management and build automation tool for Java projects with dependency management and lifecycle management.

Used for managing dependencies, building multi-module projects, and automating deployment pipelines.

TradingView

Trading

Charting platform and social network for traders and investors with Pine Script support.

Used for technical analysis, strategy backtesting, and Pine Script development.

Stripe Dashboard

Payment

Web interface for managing Stripe payment processing, customers, and transactions.

Used for monitoring and managing payment integrations and transaction flows.

PostgreSQL

Database

Advanced open-source relational database with ACID compliance, complex queries, and excellent performance for financial data.

Primary database for banking transactions, customer data, and payment records with strong consistency guarantees.

Redis

Cache

In-memory data structure store used as cache, message broker, and session store with sub-millisecond latency.

Used for caching frequently accessed data, session management, and rate limiting in banking microservices.

Apache Kafka

Message Queue

Distributed event streaming platform for high-throughput, fault-tolerant message processing and event-driven architectures.

Core messaging infrastructure for event-driven banking platform, SAGA orchestration, and audit logging.

RabbitMQ

Message Queue

Message broker supporting multiple messaging protocols with reliable message delivery and flexible routing.

Used for asynchronous payment processing, notification services, and inter-service communication.

Prometheus

Monitoring

Open-source monitoring and alerting toolkit with time-series database for metrics collection and analysis.

Monitoring microservices performance, JVM metrics, database connections, and system health indicators.

Grafana

Visualization

Analytics and interactive visualization platform for creating dashboards from time-series data.

Building real-time dashboards for monitoring banking platform metrics, transaction volumes, and system performance.

ELK

ELK Stack

Logging

Elasticsearch, Logstash, Kibana stack for centralized logging, log analysis, and search across distributed systems.

Centralized logging for all microservices, transaction tracking, and debugging distributed system issues.

Zipkin

Tracing

Distributed tracing system for tracking requests across microservices and identifying performance bottlenecks.

Tracking payment transactions across multiple services and analyzing latency in distributed workflows.

Docker

Containerization

Platform for developing, shipping, and running applications in isolated containers with consistent environments.

Containerizing all microservices for consistent deployment across development, staging, and production environments.

Kubernetes

Orchestration

Container orchestration platform for automating deployment, scaling, and management of containerized applications.

Orchestrating banking microservices deployment with auto-scaling, load balancing, and self-healing capabilities.

GitHub Actions

CI/CD

Automation platform for building CI/CD pipelines directly integrated with GitHub repositories.

Automating testing, building Docker images, and deploying microservices to Kubernetes clusters.

Postman

API Testing

API development and testing platform for designing, testing, documenting, and monitoring REST APIs.

Testing banking APIs, payment endpoints, and microservices integration with automated test collections.

Swagger/OpenAPI

API Documentation

API specification standard and tooling for designing, documenting, and generating REST API clients.

Documenting banking microservices APIs with interactive documentation and automated client generation.

PyCharm

IDE

Professional Python IDE with advanced code assistance, debugging, and integrated testing for data science and AI projects.

Development environment for AI fraud detection systems, ML models, and Python-based data processing pipelines.

LangChain

AI Framework

Framework for building applications with large language models, supporting chains, agents, and memory.

Building RAG systems for financial document analysis, customer support chatbots, and intelligent data retrieval.

Pinecone

Vector DB

Vector database for semantic search and similarity matching with high-performance indexing for AI applications.

Storing and querying embeddings for RAG systems, document similarity search, and fraud pattern matching.

ChromaDB

Vector DB

Open-source embedding database for building AI applications with semantic search capabilities.

Local vector storage for development and testing of RAG systems and semantic search features.

TensorFlow

ML Framework

End-to-end open-source platform for machine learning with comprehensive ecosystem for model development and deployment.

Building and training fraud detection models, transaction anomaly detection, and risk assessment systems.

Pandas

Data Analysis

Python library for data manipulation and analysis with DataFrame objects for structured data processing.

Processing financial data, transaction analysis, feature engineering for ML models, and data preprocessing.

Jupyter Notebooks

Data Science

Interactive computing platform for exploratory data analysis, visualization, and sharing analytical workflows.

Exploratory analysis of transaction data, prototyping ML models, and creating shareable financial reports.

Git & GitHub

Version Control

Distributed version control system for tracking code changes, collaboration, and managing project history.

Version control for all microservices, infrastructure as code, and collaborative development workflows.

Visual Studio Code

Editor

Lightweight, extensible code editor with support for multiple languages, debugging, and rich extension ecosystem.

Secondary editor for YAML configurations, Docker files, shell scripts, and markdown documentation.

# Blog

Thoughts and experiments from my development journey.

# Professional Project Portfolio

Banking Microservices Platform

Payment Processing Microservice

AI-Powered Fraud Detection System

Financial Data Processing & Analytics

Algorithmic Trading System

Payment Gateway Integration Solutions

Financial Market Data Integration

# Coding Books Library

# Tools & Applications

# Blog