Full Stack Developer

I develop APIs, integrations and web interfaces.

I'm a Full Stack Developer who enjoys turning business requirements into working software.

My experience spans REST APIs, service integrations, authentication, database design, caching and backend architecture, while I also build modern interfaces with React, Next.js, Vue and TypeScript.

I care about maintainable code, clear system boundaries and building software that can evolve without becoming difficult to operate.

Selected WorkView Selected Work GitHub LinkedIn

Currently building at GG Tech

Kamil Şen

Full Stack Developer

Current

GG Tech

Location

Istanbul, Türkiye

Focus

Backend Systems

API Integrations

Full Stack Products

Core Stack

.NETNode.jsPostgreSQLReactTypeScript

const focus = [
  "backend",
  "integrations",
  "reliable systems"
]

Currently exploringDistributed systems · AI integrations · better developer tooling

Education

Istanbul Medeniyet University

B.Sc. Computer Engineering

2021 — 2025

GPA

3.14 / 4.00

Experience

Feb 2026 — PresentIstanbul
Full Stack Developer
GG Tech
Current
- Develop backend services with .NET and Node.js.
- Work on new features, existing system improvements and third-party API / AI service integrations.
- Build React-based user interfaces and reusable UI components.
- Work with MongoDB/Mongoose and PostgreSQL for application data models.
.NETNode.jsReactMongoDBPostgreSQLAPI Integrations
Jul 2025 — Nov 2025Istanbul
Full Stack Developer
Aktaş Bilgi Teknolojileri
- Worked on an enterprise Fleet Management System.
- Developed .NET backend services and Nuxt 4 / Vue 3 / TypeScript frontend modules.
- Extended Syncfusion Grid and UI components for project-specific requirements.
- Implemented server-side pagination, filtering and sorting flows.
.NETNuxtVueTypeScriptSyncfusionPiniaZod
Aug 2024 — Sep 2024Istanbul
Backend Developer — Intern
Veripark
- Built small backend projects using C#, ASP.NET Core and Web API.
- Worked with JavaScript and Angular on frontend development.
- Practiced API development and backend fundamentals.
C#ASP.NET CoreWeb APIAngularJavaScript
Jul 2024 — Aug 2024Istanbul
Full Stack Developer — Intern
Exedra HRTech Company
- Worked on backend development using ASP.NET Core API and MSSQL.
- Developed Angular features integrated with backend services.
ASP.NET CoreMSSQLAngular
Feb 2024 — Jun 2024Istanbul
Full Stack Developer — Part Time
Smarttek Bilişim LTD
- Worked on backend development in a microservice-oriented system using ASP.NET Core, Entity Framework Core and MSSQL.
- Developed frontend features with JavaScript and jQuery on ASP.NET Core MVC.
- Worked on service-to-service structures, business rules and database operations.
ASP.NET CoreEF CoreMSSQLMVCJavaScriptjQuery

Selected Work

A selection of backend-heavy systems, integrations and full-stack products I've worked on.

Backend / SaaS

Multi-Channel Automation & Subscription Platform

A production-oriented SaaS platform combining backend automation, subscriptions, scheduled jobs and multi-channel messaging integrations.

Node.js
Express
MongoDB
Mongoose
Redis
Passport JWT
OAuth 2.0
Stripe

JWT and refresh-token authentication
Stripe subscriptions and webhooks
Twilio, Slack and OAuth integrations
Redis caching and scheduled jobs

View case study

Mock architecture diagram for Multi-Channel Automation & Subscription Platform — Architecture overview
// reliable boundaries

Backend / Microservices

E-Commerce Microservices Platform

A .NET microservices e-commerce system with asynchronous messaging, caching, gateway routing and database-per-service architecture.

ASP.NET Core 9
CQRS
MediatR
Entity Framework Core
PostgreSQL
RabbitMQ
MassTransit
gRPC

Database-per-service with PostgreSQL
RabbitMQ + MassTransit messaging
YARP API gateway and gRPC
Redis cache-aside and Docker Compose

View case study

Mock architecture diagram for E-Commerce Microservices Platform — Architecture overview
// clear data flow

Backend / Integration

Trendyol Marketplace Integration System

An integration platform connecting Trendyol Marketplace APIs with internal operational workflows through a clean .NET backend and role-based management interface.