Software Engineer and Computer Engineering graduate focused on backend and full-stack development. I work with Python, TypeScript/JavaScript, React, Next.js, Node.js, Java/Spring Boot and PostgreSQL. I have international software development experience from Barcelona, where I worked on production web projects. I’m currently focusing on Python backend development, APIs, data-driven applications and AI/semantic search systems.…

Koray Kocaelli

Software Engineer and Computer Engineering graduate focused on backend and full-stack development. I work with Python, TypeScript/JavaScript, React, Next.js, Node.js, Java/Spring Boot and PostgreSQL. I have international software development experience from Barcelona, where I worked on production web projects. I’m currently focusing on Python backend development, APIs, data-driven applications and AI/semantic search systems.…

Available to hire

Software Engineer and Computer Engineering graduate focused on backend and full-stack development. I work with Python, TypeScript/JavaScript, React, Next.js, Node.js, Java/Spring Boot and PostgreSQL.
I have international software development experience from Barcelona, where I worked on production web projects. I’m currently focusing on Python backend development, APIs, data-driven applications and AI/semantic search systems.

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Skills

Experience Level

CSS
Expert
JavaScript
Expert
C#
Expert
Docker
Expert
Java
Expert
Python
Expert
.NET
Expert
Vue.js
Expert
SQL
Expert
GraphQL
Expert
Spring
Expert
Flutter
Expert
TypeScript
Expert
Jira
Expert
PostgreSQL
Expert
Web Design
Expert
MySQL
Expert
React JS
Expert
HTML5
Expert
API
Expert
AngularJS
Expert
Node.js
Intermediate
React Native
Intermediate
Kubernetes
Intermediate
SEO
Intermediate
GitHub CoPilot
Intermediate
GitHub
Intermediate
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Language

English
Fluent
Turkish
Fluent
German
Beginner
Spanish; Castilian
Beginner

Work Experience

Software Developer Internship at Placenet, The Internet of Places
October 1, 2025 - January 1, 2026
Improved production websites through UI/UX, SEO, content, and responsive updates across existing pages. Built 3 new pages and 3 new Flipcard components, and improved existing Flipcards with responsive behavior for desktop and mobile. Built a Payload CMS-based site architecture from scratch, enabling non-technical users to manage content via a structured admin interface.
IT Consultant Internship at The Adaptavist Group
July 1, 2024 - August 1, 2024
Completed hands-on projects in an Agile environment using Jira, Confluence, and Jira Service Management, simulating real client workflows and service management scenarios. Built Jira workflows and automations across cloud and local environments, configured and tested solutions, and presented results in English at the end of the internship.
Java Software Developer Internship at Kafein Technology Solutions
January 1, 2024 - February 1, 2024
Delivered an end-to-end full-stack web application by integrating frontend, backend, and database into a working product within the internship timeframe. Developed functionality using Java, Spring Boot, Vue.js, REST APIs, and database operations, completing the requested features by the end of the internship.
Web Operations & Archive Support (Part-time) at Temple Radio
January 1, 2024 - Present
Manage a live online radio platform and its DJ/set archive, publishing new content, removing outdated entries, and keeping site content current. Provide web support and troubleshooting, performing regular content and platform updates to maintain reliability and consistency.

Education

B.S. in Computer Engineering at DOGUS University
September 23, 2019 - March 17, 2026
Computer Science at University of Lodz
September 26, 2022 - February 17, 2023
Erasmus+ Exchange

Qualifications

Data & AI Class
September 18, 2023 - September 19, 2030

Industry Experience

Computers & Electronics, Software & Internet, Media & Entertainment, Education
    Internship Management System

    An internship management platform developed as a graduation project in a two-person team.
    I built Angular application components and services and integrated REST APIs for student and instructor workflows. The system included separate token-based authentication flows for students and instructors, along with document submission, approval and internship tracking functionality.
    Tech: Angular, REST APIs, Token-Based Authentication

    GitHub: https://www.twine.net/signin

    Auction House Web Application

    A full-stack auction platform developed as a graduation project in a four-person team, with two frontend and two backend developers.
    I led most of the frontend implementation using Next.js and React and integrated the frontend with backend APIs for product listings, bidding, auction management and shopping cart functionality.
    Tech: Next.js, React, REST APIs

    GitHub: https://www.twine.net/signin

    Music Metadata Intelligence

    A backend-first music metadata processing and matching platform currently in development. Built with Python, FastAPI, PostgreSQL and SQLAlchemy.
    The system focuses on ingesting, normalizing, matching and searching music metadata, including typo-tolerant and version-aware matching. I’m also building API endpoints, database persistence, migrations and automated tests as the project evolves.
    Tech: Python, FastAPI, PostgreSQL, SQLAlchemy, Alembic, Docker, Pytest

    GitHub: https://www.twine.net/signin

    Smart Semantic Search

    A lightweight semantic search system that retrieves relevant text chunks based on meaning rather than simple keyword matching.
    I built the retrieval pipeline using Python, PostgreSQL/pgvector and Sentence Transformers, generating embeddings and using vector similarity to find the most relevant content for a query. The project helped me explore practical semantic retrieval and the foundations used in RAG systems.
    Tech: Python, PostgreSQL, pgvector, Sentence Transformers

    GitHub: https://www.twine.net/signin