Koray Durudoğan

Software Principal Engineer @Hepsiburada

İzmir, Türkiye

About

I am a software principal engineer, working since 2015. I mainly focus on .Net technologies. I share my side projects at my personal GitHub and I write blogs about programming in my free times.

Experience

  • Hepsiburada ()
    • Principal Software Engineer
      Jan 2025 - Present · 1 yr 7 mos

      I have also taken on responsibilities related to shaping the future direction of the product, driving both business and technical planning, leading projects end-to-end, and taking ownership of the team's technical decisions.

    • Senior Backend Developer
      Sep 2022 - Jan 2025 · 2 yrs 5 mos

      https://merchant.hepsiburada.com/ I am a senior backend developer in a scrum team responsible for developing screens/services for merchants on one of Turkey's most highly trafficked e-commerce platforms, listed on the NASDAQ. I play a key role in developing architectures that handle 1.2 million requests per second, utilizing various modern technologies. In systems where security and performance are critical, I work in coordination with large teams to achieve challenging goals.

  • Senior FullStack Developer at CicekSepeti.com / Lolaflora.com
    Nov 2021 - Sep 2022 · 11 mos

    https://www.mizu.com/ https://www.ciceksepeti.com/ I worked as a senior fullstack developer in a Kanban-driven product team for a high-traffic e-commerce platform serving Turkey and Mexico. In addition to developing tasks with short and challenging deadlines at a high standard, I supported team members, conducted code reviews and mentored junior developers.

  • Senior Backend Developer at BHL Turkey
    Aug 2020 - Nov 2021 · 1 yr 4 mos

    https://www.hesapkurdu.com/ I worked as a senior back-end developer in one of the B2C teams of HesapKurdu, a popular financial service broker in Turkey. During the last 9 months, when the team lacked a team lead, I took on the responsibility of leading the team and managed a project that involved migrating the infrastructure to a micro-service architecture. I successfully managed these processes while working closely with the CTO and managers, playing a key role in helping the team achieve its goals. Additionally, I participated in technical interviews.

  • FullStack Software Developer at VeriPark
    Nov 2015 - Aug 2020 · 4 yrs 10 mos

    https://www.akbank.com/en-us/Pages/default.aspx I worked as a full-stack developer contractor at Akbank, the largest bank in Turkey. I contributed to critical processes such as money transfers, tax payments, account openings, and many other important workflows. I provided support in resolving bugs at every level in UAT, SIT, and PreProd environments and fixed defects in the live environment. By prioritizing end-to-end customer satisfaction, I successfully delivered challenging tasks with tight deadlines to users.

  • Internship at Aselsan
    Jul 2014 - Aug 2014 · 2 mos

    Developed a product licensing program in Radar Electronic Warfare and Information Technologies Department.