Andrej J.

Andrej J.

Prague, Czech Republic
Hire Andrej J. Hire Andrej J. Hire Andrej J.

About Me

Andrej is a Senior React.js Developer with a thorough understanding of React and its core principles, design concepts and object-oriented programming. He is familiar with modern web/UI development tools and techniques, develops user interface components and implements solutions that follow well-known workflows - executing robust and easy-to-manage applications and presenting solutions consistent with business objectives and strategy.

Frontend

QA & Testing

Workflow

Other

Work history

UpStack
UpStack
Senior React.js Developer
2022 - Present (3 years)
Remote
  • Creating and developing innovative software solutions for clients across a broad range of industries.

  • Participate in scrums consisting of cross-functional teams, both software and hardware.

  • Ensure that features are being delivered efficiently and on-time.

JavaScript Developer
JavaScript Developer
Senior Software Engineer
2018 - Present (7 years)
Remote
  • Led a team of 4 devs to design, develop, maintain and enhance web and mobile applications on the Planr platform for Codeto.

  • Actively participated in delivering high-quality cross-platform streaming solutions for TV and mobile devices.

  • Designed and delivered two enterprise-grade web apps for Dôvera - modernizing legacy solutions to enhance UX for users.

FELFEL
FELFEL
Senior Engineer
2016 - 2019 (3 years)
Zürich, Switzerland
  • Oversaw all mobile development tasks on the FELFEL platform - deploying a new logistics app to enhance operational efficiency and performance. Assisted the company in becoming the most successful food-tech startup in Switzerland.

  • Played an integral part in implementing mobile solutions on a dynamic POS application to improve service delivery on the FELFEL intelligent self-service fridges.

  • Delivered new print functionalities on the platform and ensured 100% uptime and offline compatibility of solutions on the platform.

GlobalLogic
GlobalLogic
Senior Software Engineer
2014 - 2016 (2 years)
Kosice, Slovakia
  • Worked on a 6-person dev team to design, develop and launch the Economist Films streaming platform for mobile and TV.

  • Built out the Home Team real-time video communication application with a 40+ distributed team for Panasonic.

  • Participated in processes to enhance solutions and manage deployments - adhering to best practices and industry standards.

SoWhat!
SoWhat!
Frontend Developer
2013 - 2014 (1 year)
Remote
  • Developed a new web app for live dog race betting - contributing to design and technology decisions to enhance mobile compatibility.

  • Refined and defined the tech stack for solutions - utilizing different tools to generaize product-specific code on the web app.

  • Identified and debugged issues - finding root causes of problems and proposing solutions and fixes.

EEA
EEA
Software Engineer
2012 - 2013 (1 year)
Slovakia
  • Designed and implemented scalable solutions that power a set of new apps for Voice of America and Radio Free Europe.

  • Prototyped and delivered UI/UX solutions for different clients.

  • Liaised with senior developers to gain a deeper understanding of mobile technologies and best practices.

Showcase

Senior Software Engineer - PLANR
Senior Software Engineer - PLANR
  • Developed and deployed frontend solutions for Codeto's PLANR product.

  • The PLANR product enables users to create schedules, view plans, and update plans in real-time.

  • Successfully launched the product within 6 months of design and implementation.

Senior Software Engineer - Smargy
Senior Software Engineer - Smargy
  • Developed and deployed new solutions for Smargy, a web platform.

  • Designed and implemented frontend solutions for the platform.

  • Focused on iterating, implementing, and launching solutions to the market.

Senior Software Engineer - Dovera a.s.
Senior Software Engineer - Dovera a.s.
  • Led a team to migrate legacy ASP.NET web apps to modern React components.

  • Improved app performance and UX through scalable architectures and new technologies.

  • Successfully delivered the PoC project.

Education

Google Certified Android Developer
Google Certified Android Developer
Google
2017 - 2020 (3 years)
BSc. Computer Science
BSc. Computer Science
Technical University of Košice
2011 - 2014 (3 years)