Freelance · Remote · Based in NRW, Germany

Backend & web development, for any industry.

I build backend systems, admin panels, and full websites end to end. My background includes payment systems and financial integrations, and I take on backend and web projects across any industry.

5+ years experience Fintech experience Full websites & admin panels
gamze@portfolio — zsh
01 Profile

About me

Skilled in backend development and full website builds, with hands-on experience in payment systems, secure transactions, and system integrations from past fintech projects. I specialize in building and integrating APIs — REST, SOAP, and ASP.NET Core MVC — across .NET Core and .NET 8. I care about clean architecture — N-Tier and microservices structures, SOLID principles, and well-chosen design patterns — not just shipping features. I've built everything from corporate websites paired with a custom admin panel to backend features for a financial application handling real transactions and live fraud controls. Adaptable, eager to learn, and committed to high-quality results.

What I build

REST & SOAP API development

System integrations & automated reporting

Full websites, front to back

Custom CMS & admin panels — full content control

Gamze Alemdar
02 Experience

Where I've worked

Software Engineer · Colendi Securities APR 2025 — JAN 2026

Contributed as a backend developer building a comprehensive financial application — implementing core features and secure financial integrations. Also designed and developed a dynamic corporate website with a custom admin panel for content management and system administration.

Software Engineer · Warpiris OCT 2024 — MAR 2025

Handled QR code–based merchant payments and refunds, performed fraud controls during FAST money transfers, and integrated SOAP services.

Software Engineer · Deniz Investment JUL 2022 — SEP 2024

Managed and enhanced websites, ensuring optimal functionality and user experience. Developed and maintained automated daily reporting platforms for the Internal Control and Credits departments using .NET Core and MS SQL.

Software Developer · Aloha Academy MAY 2021 — APR 2022

Focused on frontend technologies — HTML, CSS, JavaScript — alongside backend development with CodeIgniter 4, for a digital education platform.

03 Skills

What I work with

skills.json
{
  "stack": ["C#", ".NET Core", ".NET 8", "JavaScript (jQuery)", "HTML5", "CSS"],
  "apis": ["ASP.NET Core MVC", "Web API", "SOAP", "WebSockets"],
  "data": ["PostgreSQL", "MSSQL", "MySQL"],
  "architecture": ["N-Tier", "Microservices", "SOLID principles", "Design Patterns"],
  "approach": ["Problem solving", "Analytical thinking", "Time management"]
}
Languages
TurkishNative
EnglishIntermediate
GermanBeginner
04 Education

Education

B.Sc. Computer Engineering — Trakya University

SEP 2019 — JUN 2022
B.A. Business Administration (English) — Anadolu UniversitySEP 2018 — JAN 2024
05 Contact

Have a project to build? Let's talk.

Location North Rhine-Westphalia, Germany
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