Devran Şimşek, Developer in Kraków, Poland
Devran is available for hire
Hire Devran

Devran Şimşek

Verified Expert  in Engineering

Bio

Devran is a React and React Native developer with 6+ years of experience providing in-house and public web and mobile applications for startups and telecommunication enterprises. Keen to work with TypeScript and JavaScript, Devran excels in solving challenging problems and is willing to embrace new ones.

Portfolio

Luxoft
React, TypeScript, Node.js, JavaScript, Redux Toolkit, Google Maps, Git, Redux...
EDUCT SOLUCOES E TECNOLOGIA LTDA
React Native, JavaScript, Expo, Android, iOS, TypeScript, Git, Redux, REST...
FarmX Inc.
React Native, JavaScript, Bluetooth, Android, Redux, iOS, TypeScript, Git, REST...

Experience

  • JavaScript - 6 years
  • GitHub - 6 years
  • React Native - 6 years
  • TypeScript - 6 years
  • Mobile Development - 6 years
  • Front-end Development - 6 years
  • React - 6 years
  • Firebase - 4 years

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

Senior Software Developer

2023 - PRESENT
Luxoft
  • Developed an app that provides proposals for products in which country/region to sell them.
  • Tracked tasks and bugs with Jira. Deployed and tested the product via GitHub Actions/Jobs.
  • Created an application that was used quickly in all areas of the company. Customers decided to create another application that helps the sales process.
  • Collaborated with members of a self-managed team. Everyone had to be like a leader, and providing feedback was encouraged.
Technologies: React, TypeScript, Node.js, JavaScript, Redux Toolkit, Google Maps, Git, Redux, REST, Jest, Front-end, Unit Testing, NPM, Maps, Front-end Development, Version Control, Responsive Web Design (RWD), Cross-browser Compatibility, Tailwind CSS

React Native Developer and Startup Team Coach

2024 - 2024
EDUCT SOLUCOES E TECNOLOGIA LTDA
  • Developed a feature that helps students to see a professor's comments on their essays. Created a tool that merged the professor's comments by highlighting parts of essays.
  • Tracked and reviewed features using GitHub and GitHub Issues.
  • Agreed with a university to use that application for students and professors to review students' essays.
  • Created a feature that was so important for professors. It reduced a lot of paperwork.
Technologies: React Native, JavaScript, Expo, Android, iOS, TypeScript, Git, Redux, REST, Mobile Development, Front-end, NPM, Front-end Development, Version Control, Responsive Web Design (RWD), Cross-browser Compatibility

React Native Developer

2023 - 2024
FarmX Inc.
  • Developed an application from scratch that helps farmers manage their ranches, clusters, etc., and a feature that checks the cluster's status via Bluetooth devices and lists them in the application.
  • Tracked and fixed bugs using Jira. Used Bitbucket for versioning.
  • Finished the application quickly, and users started using it. They increased their proactiveness in managing their farms.
  • Developed a map solution to give users the ability to view their ranches, blocks, and sensors that they have on ranches.
Technologies: React Native, JavaScript, Bluetooth, Android, Redux, iOS, TypeScript, Git, REST, Jest, Mobile Development, Front-end, Redux Toolkit, Google Maps, Unit Testing, NPM, Maps, Front-end Development, Version Control, Responsive Web Design (RWD), Cross-browser Compatibility

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, Redux Toolkit, Version Control, Responsive Web Design (RWD), Cross-browser Compatibility

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, Unit Testing, Version Control, Responsive Web Design (RWD), Cross-browser Compatibility

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, Version Control, Responsive Web Design (RWD), Cross-browser Compatibility

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, Version Control, Responsive Web Design (RWD), Cross-browser Compatibility

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, Version Control, Responsive Web Design (RWD), Cross-browser Compatibility

Experience

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.

Education

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

Certifications

AUGUST 2022 - PRESENT

Certified Solidity Developer

Udemy

Skills

Libraries/APIs

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

Tools

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

Languages

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

Frameworks

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

Paradigms

REST, Mobile Development, Unit Testing, Responsive Web Design (RWD)

Platforms

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

Storage

MongoDB, Google Cloud, PostgreSQL

Other

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

Collaboration That Works

How to Work with Toptal

Toptal matches you directly with global industry experts from our network in hours—not weeks or months.

1

Share your needs

Discuss your requirements and refine your scope in a call with a Toptal domain expert.
2

Choose your talent

Get a short list of expertly matched talent within 24 hours to review, interview, and choose from.
3

Start your risk-free talent trial

Work with your chosen talent on a trial basis for up to two weeks. Pay only if you decide to hire them.

Top talent is in high demand.

Start hiring