Sefa T

ST

Looking for a job

Sefa T

@sefat

Mobile developer at Retter.IO who developed and maintains Emirates Group’s MMI Home Delivery e-commerce app.

At Retter.IO, I develop and maintain MMI Home Delivery, a mobile e-commerce application for Emirates Group. My work covers the app’s UI architecture, state management, API integrations, performance optimization, and deployment using Expo and React Native.

At venuex.io, I developed web interfaces and worked on performance improvements and user experience enhancements. I used React and TypeScript alongside MUI, Node.js, and NestJS.

Earlier, I developed web and mobile applications, APIs, and integrations for VPN, logistics, and e-commerce systems at Poshta UA. At Çakınberk Telekom, I worked on AlgoTrading and SMTP mail validation projects; I also maintained an MMORPG and added features at JollyGame.

Experience

Work history, roles, and key accomplishments

RE

Current

Senior Developer – Mobile

Current

Retter.IO

Jun 2025 - Present (1 year 5 months)

Developed and maintained the MMI Home Delivery mobile e-commerce application for Emirates Group using Expo and React Native, covering UI architecture, state management, API integrations, performance optimization, and deployment.

React Native Expo Next.js

VE

Senior Frontend Developer

venuex.io

Jul 2023 - Mar 2025 (1 year 8 months)

Developed web interfaces, improved performance, and enhanced user experience.

React TypeScript MUI NodeJS NestJS

PU

FullStack Developer

Poshta UA

Feb 2022 - May 2023 (1 year 3 months)

Worked on VPN, logistics, and e-commerce systems. Developed web and mobile applications, APIs, and integrations.

React Next.js React Native NodeJS ExpressJS MongoDB Redis

AT

FullStack Developer

Çakınberk Telekom

Feb 2019 - Feb 2022 (3 years)

Performed full-stack development in Algo Trading and SMTP mail validation projects.

React Next.js React Native NodeJS ExpressJS

JO

Game Developer

JollyGame

Sep 2017 - Feb 2019 (1 year 5 months)

Handled maintenance and added new features for an MMORPG game.

Unity C#HTML CSS JavaScript

DT

Junior Frontend Developer

Dijitaladam - Yazılım Teknolojileri

Sep 2016 - Sep 2017 (1 year)

Implemented web designs and developed mobile applications.

HTML CSS JavaScript React

BB

Intern

Balıkesir Üniversitesi - Bilgi İşlem Daire Başkanlığı

Sep 2014 - May 2016 (1 year 8 months)

Contributed to the development of university web projects.

PHP MySQL HTML CSS JavaScript

Education

Degrees, certifications, and relevant coursework

AU

Anadolu University

Bachelor's degree, Management Information Systems

2018 - 2020

Pursued a Bachelor's degree in Management Information Systems from 2018 to 2020.

BU

Balıkesir University

Associate degree, Computer Programming

2014 - 2016

Completed an Associate degree in Computer Programming from 2014 to 2016.

MS

Mimar Sinan Meslek High School

High school, Database Programming

2010 - 2014

Completed high school education with a focus on Database Programming from 2010 to 2014.

Tech stack

Software and tools used professionally

Electron

React Native

Expo

MySQL

MongoDB

Node.js

Next.js

NestJS

Redis

React

Vue.js

JavaScript

HTML5

PHP

C#

ExpressJS

Socket.IO

TypeScript

Blender

Availability

Looking for a job

Location

Turkey

Authorized to work in

Salary expectations

200k+ TRY

Job categories

Full Stack Developer Front End Developer Game Developer

Skills

Mobile Application Developer React Native Expo Fullstack Development Frontend Development Web Development API Integration Ecommerce NodeJS React Next.js TypeScript NestJS ExpressJS MongoDB

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