Devran Şimşek, Developer in Kraków, Poland
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Devran Şimşek

Verified Expert  in Engineering

React Developer

Location
Kraków, Poland
Toptal Member Since
July 5, 2022

Devran is a React and React Native developer with 4+ years of experience providing in-house and public web and mobile applications for startups and telecommunication enterprises. Keen on working with TypeScript and JavaScript, Devran excels in solving challenging problems and is willing to embrace new ones.

Portfolio

Huawei Technologies Co.
TypeScript, JavaScript, Redux, REST, Jest, HTML, CSS, GitHub, Jira, Git...
Bircom
TypeScript, JavaScript, React Native, Java, Git, Jest, REST, CodePush, Redux...
Lama Software
JavaScript, Node.js, PostgreSQL, React, React Native, Jest, Git, REST, Redux...

Experience

Availability

Part-time

Preferred Environment

MacOS, Slack, GitLab, GitHub, Bitbucket, Jira, Trello, Visual Studio Code (VS Code), Git

The most amazing...

...startup solution I've developed and managed is the mobile application of a social platform that helps find new friends for activities based on common interests.

Work Experience

React Engineer

2021 - 2023
Huawei Technologies Co.
  • Optimized the in-house operation support system by 35% with React and led a team of seven front-end engineers.
  • Maintained projects, identifying and fixing bugs, and using Jira as a Kanban tool.
  • Supported many telecommunications companies in managing and checking the status of their base stations.
  • Received a sparkling award for being a solution-oriented leader in December 2021.
Technologies: TypeScript, JavaScript, Redux, REST, Jest, HTML, CSS, GitHub, Jira, Git, Visual Studio Code (VS Code), React, GraphQL, Next.js, Apollo, Front-end, Front-end Development, React Redux, APIs, Unit Testing, NPM, Webpack, Maps

React Native Developer

2020 - 2021
Bircom
  • Developed a mobile application for telecommunication companies to see customers' location, needs, and problems and manage all related processes.
  • Ensured project maintenance, identifying and fixing bugs, and using Jira as a Kanban tool.
  • Created an application that field agents of various telecommunication companies use to manage customers' support cases, upload files, and triage customer issues.
Technologies: TypeScript, JavaScript, React Native, Java, Git, Jest, REST, CodePush, Redux, Mobile Development, Android Studio, MacOS, Firebase, CSS, GitLab, GitHub, Bitbucket, Jira, Visual Studio Code (VS Code), React, Front-end, User Interface (UI), Mobile, Front-end Development, Android, React Redux, APIs, NPM, Maps

React and React Native Full-stack Developer

2019 - 2020
Lama Software
  • Completed the web version of the existing social network platform for university students, Stubridge, with React. I also developed the mobile version with React Native from scratch in one month.
  • Used Jira to keep track of identified and fixed bugs, handling projects' maintenance.
  • Created more than 500 activities and notes in the university courses and clubs.
Technologies: JavaScript, Node.js, PostgreSQL, React, React Native, Jest, Git, REST, Redux, Mobile Development, App Store, Xcode, Android Studio, Google Play Console, MacOS, Firebase, HTML, CSS, GitLab, GitHub, Bitbucket, Jira, Trello, WebSockets, Facebook SDK, Visual Studio Code (VS Code), TypeScript, Front-end, User Interface (UI), Google Play Store, Responsive Web Apps, Mobile, Front-end Development, Android, iOS, React Redux, APIs, NPM, Webpack

React Front-end Developer

2018 - 2019
Ala Proje
  • Created a website builder and components all websites need and the flow creator for logic.
  • Maintained projects by identifying and fixing bugs and using Jira as a Kanban tool.
  • Built 300 web applications in just one month for the government of Turkey.
Technologies: JavaScript, React, Git, Jest, Redux, MacOS, HTML, CSS, GitLab, GitHub, Bitbucket, Jira, Trello, REST, Mobile Development, Visual Studio Code (VS Code), React Native, Firebase, Front-end, User Interface (UI), Responsive Web Apps, Front-end Development, React Redux, APIs, NPM, Webpack

React Full-stack Developer

2018 - 2018
OnitSistem
  • Developed a web application that allows authors to manage their work with team members, search among two million articles, and create their own with a smart LaTeX editor.
  • Maintained the project by identifying and fixing bugs and using Trello as a Kanban tool.
  • Led the project to the quarter-final of Tubitak but missed the investment that would allow it to proceed.
Technologies: JavaScript, HTML, CSS, React, Firebase, MongoDB, Node.js, WebSockets, Linux, Amazon Web Services (AWS), Google Cloud, Redux, Context API, GitHub, Jira, Trello, Git, REST, Mobile Development, Visual Studio Code (VS Code), React Native, Material UI, Front-end, MERN Stack, User Interface (UI), Responsive Web Apps, Front-end Development, React Redux, APIs, NPM

Urbansurf

https://urbansurf.me/
Urbansurf is a React Native-based application that works as a social media platform for travelers. It enables them to find the best places to eat, places and experiences to try out, and new friends, create activities, and become a local guide—Urbaner. I was the front-end developer and leader of the project.

CEDA Forex and Crypto Signals

https://apps.apple.com/us/app/ceda-forex-and-crypto-signals/id1628609081
A React Native-based application for Forex signals monitoring. I was a React Native developer and liaised with the back-end developer to integrate external tools needed for displaying information in the home and details screens. Users get premium signals via in-app purchases to see premium signals.

Utofix

Utofix is an In-House, React Native-based application for 30+ telecommunications companies to manage their field agents, manage customers' support cases, upload files, and triage customer issues. I performed as a React Native developer, writing and refactoring the application from scratch.

Languages

JavaScript, HTML, CSS, TypeScript, Java, Solidity, SQL, Swift, GraphQL

Frameworks

React Native, Redux, Jest, Material UI, Next.js

Libraries/APIs

React, Context API, Facebook SDK, React Redux, Node.js

Tools

GitLab, GitHub, Bitbucket, Jira, Trello, Git, Xcode, Android Studio, NPM, Webpack

Paradigms

REST, Mobile Development, Unit Testing

Platforms

MacOS, Firebase, Mobile, Visual Studio Code (VS Code), Linux, Android, iOS, Amazon Web Services (AWS), Blockchain

Other

WebSockets, App Store, Google Play Console, Front-end, Google Play Store, Front-end Development, APIs, Maps, Technical Writing, MERN Stack, User Interface (UI), Responsive Web Apps, CodePush, Apollo

Storage

MongoDB, Google Cloud, PostgreSQL

2016 - 2018

Associate's Degree in Computer Programming

Istanbul Topkapi University - Turkey, Istanbul

2012 - 2015

High School Diploma in Information Technologies

Technical Anatolian High School - Turkey, Istanbul

AUGUST 2022 - PRESENT

Certified Solidity Developer

Udemy

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