Hello, I'm Mert Topal

Engineering
Intelligent Systems.

Senior Java Backend Developer

Senior Java Backend Developer specializing in scalable microservices, legacy system modernization (Java 7/8 to 17), and telecom BSS transformation. Expert in building high-performance systems using Spring Boot, REST APIs, and modern CI/CD pipelines. Actively integrating AI-driven automation into development workflows to enhance system efficiency.

E-posta İletişim merrt.topal@gmail.com LinkedIn Profili linkedin.com/in/merrttopal Lokasyon Istanbul, Turkey
View My Work Experience

Professional Experience

Senior Software Development Specialist

Etiya

Sep 2023 - Present Istanbul, Turkey
  • Java Modernization: Migrated a legacy monolithic telecom application from Java 8 to Java 17, resolving compatibility issues, refactoring deprecated APIs, and improving performance and security.
  • Recurring Payment: Developed a Recurring Payment microservice from scratch using Java & Spring Boot, handling end-to-end subscription payments and ensuring scalable flows.
  • Document Engine: Designed and implemented a multi-tenant Document Engine microservice (Java, Spring Boot) using HTML rendering and Jasper Reports.
  • AI-Enhanced Productivity: Successfully integrated AI tools into the development lifecycle at Etiya, increasing overall code quality and delivery speed by 70%.
  • BSS Transformation: Contributed to the development and optimization of Product Catalog Management, CPQ (Configure, Price, Quote), and Customer Asset modules to streamline complex telecom sales workflows.
  • Quality & DevOps: Improved CI/CD pipelines (Bitbucket, Jenkins, ArgoCD) and maintained 80%+ unit test coverage using JUnit and Mockito.
Java Mimarisi Java 17 Spring Boot Framework Spring Boot Mikroservis Tasarımı Microservices Telekom CPQ CPQ n8n Workflow n8n DevOps CI/CD Pipeline CI/CD

Engineering Portfolio

Showcasing high-impact technical solutions, automation architectures, and specialized developer tooling.

Kişisel Altyapı Ev Sunucusu

Self-Hosted Home Server

Architected and deployed a full-stack home server infrastructure from scratch. Managed via Ubuntu Server, CasaOS, and Docker, secured with Cloudflare, hosting various personal services and tools.

Ubuntu Server CasaOS Docker Cloudflare
AI Otomasyon Sistemleri

AI Automation Workflows

Developed custom AI-driven automation workflows using n8n and modern LLM integrations to optimize technical task management.

n8n LLM Integrations Automation
Geliştirici Araçları Portali

Cloud-Native Toolset

Built and maintains a browser-based developer toolset (JSON viewer, JWT decoder, etc.) hosted at tools.merrt.com.tr.

Open Toolset
CRM Uygulama Demoları

CRM

Interactive demonstration of advanced Customer Relationship Management and Business Support Systems architecture and capabilities.

Live Preview
TMF Telekom Open API Ortamı

Telco API Sandbox

A production-grade mock API service providing dynamic, TMF-compliant telecom data for testing BSS/OSS integrations.

Explore API

Professional Certifications

Continuous learning and validation of expertise across critical domain architectures and technologies.

Sistem Mimari Belgeleri

Architecture & Frameworks

  • ODA Overview & Components (TM Forum)
  • ODF Foundation (TM Forum)
  • SID Foundation (TM Forum)
  • TAM Foundation (TM Forum)
  • eTOM Fundamentals & Foundation (TM Forum)
AI ve Dönüşüm Belgeleri

AI & Digital Transformation

  • AI & CX Awareness
  • AI & Automation Foundation
  • Managing Digital Transformation (ODF)
  • Digital Maturity Fundamentals
  • DT4DI Awareness
  • MAMA Awareness
Geliştirme Belgeleri

Core Development

  • Java 301 - Turkcell Geleceği Yazanlar
  • Customer Centricity Foundation