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CBCemal Bayraktar
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Cemal Bayraktar

Cemal Bayraktar

Software Developer · Istanbul, Türkiye

[email protected]

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I'm a software developer based in Istanbul. I studied electrical and electronics engineering, started my career in embedded software, and have worked on enterprise Java projects since 2021.

Today I build backend systems at IBSS Teknoloji. On the technical side that means microservice architecture, event-driven communication with Kafka, SAP and Active Directory integrations, and role-based access control. Splitting work within the team, technical design and requirement sessions with clients are part of the job too.

Alongside that I build end-to-end solutions for companies: IoT dashboards that monitor devices in the field, business apps that track production, and company websites. Lately I've been focusing on domain-driven design and hexagonal architecture, and I write about what I learn.

Experience

  1. Jan 2024 — present

    Software Developer · IBSS Teknoloji

    Full-time · Istanbul

    • Task planning, software architecture and conceptual design within the team
    • Requirement analysis and technical consulting with clients
    • Microservices and enterprise web apps with Java 17/21 and Spring Boot; Angular and React front ends

    Java 21 · Spring Boot · Spring Security · Spring Cloud · Kafka · GraphQL · Docker · Jenkins · Angular · React

  2. Jan 2022 — Dec 2023

    Senior Consultant (Java) · BTC Bilişim Hizmetleri

    Full-time · Istanbul

    • Intranet portal and HR performance app for Zorlu Holding
    • Automatic SAP HR to Active Directory synchronisation for Aydem Enerji
    • SAP Netweaver Portal extensions for SOCAR Energy

    Java 8/17 · Spring Boot · Spring LDAP · Hibersap · EclipseLink · DB2 · MS SQL · JAX-RS · SOAP

  3. Feb 2021 — Jan 2022

    Consultant (Java) · BTC Bilişim Hizmetleri

    Full-time · Istanbul

    • Kale Kilit smart lock: nRF52, Bluetooth Low Energy, Embedded C
    • Intranet portal for Temsa Construction Machinery (JSF, PrimeFaces, SAP JCo)
    • Content management system for Gübretaş

    Java 8 · JSF · PrimeFaces · Hibernate · MS SQL · SAP JCo · Embedded C

  4. Sept 2019 — Feb 2021

    Embedded Software Engineer · R2K Teknoloji

    Full-time · Istanbul

    • Control firmware for a laser epilation device
    • Domestic hardware and software design by reverse-engineering imported devices
    • Touchscreen user interfaces

    Embedded C · STM32 · AVR · 8051

  5. Jul 2018 — Jul 2019

    Platoon Leader · Turkish Armed Forces

    Military service · Ankara · Şırnak

  6. Aug 2014 — Jul 2018

    Freelance Projects and Professional Training · Self-employed

    Freelance

    • Site management for electrical contracting projects
    • Embedded software training and freelance projects

Projects

  • 2026Move Metal · Engineering metalsA bilingual company website for an engineering-metals supplier: 180+ pages, a five-step quote request form and a content panel.
  • 2026Alaşımlı Metal · Scrap metal recyclingA bilingual website for a scrap-metal buyer. Its price list updates itself every morning.
  • 2026 — presentErzetaHub · Industrial control and IoTAn IoT management platform that collects telemetry from ESP32 devices in the field over MQTT, with live monitoring, remote commands and OTA updates.
  • 2026 — presentMona Laminat · Furniture manufacturingA business app for a furniture manufacturer that tracks orders, stations and operators. Operator screens update live.

Enterprise Projects →

Skills

Languages
Java (advanced), C/C++ (advanced), Embedded C (advanced)
Backend
Spring Boot (advanced), Spring Data JPA (advanced), Spring Security (advanced), Spring LDAP (advanced), Spring Cloud (advanced), JAX-RS (advanced)
APIs
REST (advanced), SOAP (intermediate), GraphQL (intermediate)
ORM
Hibernate (advanced), EclipseLink (advanced), Hibersap (advanced)
Databases
MS SQL (advanced), MySQL (advanced), PostgreSQL (intermediate), DB2 (intermediate), MongoDB (beginner)
Frontend
PrimeNG (advanced), JSF (advanced), JSP (advanced), PrimeFaces (advanced), Angular (intermediate), Angular Material (intermediate)
Architecture
Hexagonal Architecture (beginner), DDD (beginner)
Embedded
AVR (advanced), 8051 (advanced), ADuC841 (advanced), STM32 (intermediate), nRF52 (intermediate), Bluetooth Low Energy (intermediate)
Tools
Docker (advanced), Maven (advanced), Git (advanced), Apache Tomcat (advanced), Nginx (advanced), SAP Netweaver Portal (advanced)

Education

  • 2010 — 2014Sakarya UniversityBSc, Electrical and Electronics Engineering
  • 2006 — 2010Ümraniye Nevzat Ayaz Anatolian High SchoolHigh school