Jozef Orenič, Developer in Košice, Slovakia
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Jozef Orenič

Verified Expert  in Engineering

Software Developer

Košice, Slovakia
Toptal Member Since
May 10, 2022

Jozef is a front end developer who loves to work with Angular, React, and Node.js. He used to work with Ionic, Redux, Bootstrap, REST API, GraphQL, WebSocket, Express.js, and material design. He also has experience working with PHP and Jakarta EE and is currently focusing on front end since a few years ago. Overall, Jozef has 10 years of experience in professional programming. His hobbies include embedded coding, 3D printing, writing blogs, and videos.


React, Storybook, Storyblok, Stencil.js, Figma, GraphQL, REST, Gatsby...
Angular, GraphQL, REST, MySQL, Solr, JavaScript, CSS, CSS3, HTML, HTML5...
Angular, Ionic 3, Android SDK, Xcode, Sentry, Apple Pay, Google Pay, CSS, CSS3...




Preferred Environment

Slack, WebStorm, Visual Studio, Git, Linux, MacOS, Teams, Bitbucket, Scrum, Affinity Designer

The most amazing...

...thing I've developed is a large adverts system used worldwide to target customers in shops.

Work Experience

Front-end Senior Developer

2021 - 2022
  • Developed new components and widgets for customers in React and Stencil.
  • Managed the connection to headless CMS Storyblok via GraphQL and REST API.
  • Supported server-side rendering and widely reusable components in Stencil.
  • Created pixel-perfect bullet-proof components, which interact with users through filters, search, and pagination.
Technologies: React, Storybook, Storyblok, Stencil.js, Figma, GraphQL, REST, Gatsby, JavaScript, HTML, CSS, TypeScript

Team Lead and Senior Software Engineer

2018 - 2022
  • Developed an extensive media and advertisement platform for clients to see how their campaigns worked, similar to Google Analytics.
  • Connected an Angular app into Solr and MySQL through GraphQL and REST with Node.js Express app.
  • Created a React front-end app to create campaigns, ads, and targeting audiences for customers worldwide.
Technologies: Angular, GraphQL, REST, MySQL, Solr, JavaScript, CSS, CSS3, HTML, HTML5, Front-end, Front-end Development, Front-end Design, Front-end Architecture, TypeScript, PostgreSQL, ECMAScript (ES6), Node.js

Full-stack Developer and Architect

2021 - 2021
  • Developed an Angular Ionic multiplatform app for an Instagram influencer with recipes.
  • Managed a fully covered architecture, created Google and Apple accounts, deployed processes, and helped customers with the whole payments process.
  • Created the app featured on App Store and Google Play Store that was downloaded by more than 12,500 users with 0% crashes.
Technologies: Angular, Ionic 3, Android SDK, Xcode, Sentry, Apple Pay, Google Pay, CSS, CSS3, HTML, HTML5, JavaScript

Front-end Team Lead, Engineer, and Architect

2018 - 2018
  • Created an online exchange between euros, dollars, and cryptocurrencies.
  • Handled complex business logic and error states at any point of the app's runtime.
  • Developed a custom, flexible, and responsive UI with a fresh new look, various screens, roles, and permissions.
Technologies: Angular, Angular CLI, REST, NPM, Sass, CSS3, Agile, Fintech, HTML, HTML5, CSS, CSS3 Animation, JavaScript, ECMAScript (ES6), TypeScript

Senior Front-end Developer

2016 - 2017
Ness Digital Engineering
  • Built an application for handling and filtering a large amount of data, security, roles management, and pixel-perfect design.
  • Used Scrum, Agile, and Jira intensively with UK customers.
  • Practiced and improved my English writing and speaking skills on a daily basis.
Technologies: React, Redux, Node.js, Webpack, Agile, RxJS, REST, HTML, HTML5, CSS, CSS3, JavaScript, ECMAScript (ES6)

Rimka Recepty
A multiplatform Angular and Ionic app for Instagram influencers with recipes.

Modern design, good-looking on any device like smartphones, tablets, and notebooks. Supported on Apple Pay and Google Pay. Connected to Ghost headless CMS for changing content.
2010 - 2015

Master's Degree in Information Technologies

Kosice Technical University - Kosice, Slovakia


Creative Skills for Innovation



React, Node.js, RxJS


Git, Angular CLI, NPM, Xcode, Figma, Slack, WebStorm, Visual Studio, Solr, Sentry, Webpack, Stencil.js


Angular, Redux, Ionic 3, Android SDK


CSS3, CSS, HTML, HTML5, TypeScript, ECMAScript (ES6), GraphQL, Sass, JavaScript, Java


Scrum, REST, Agile, Design Thinking


MySQL, PostgreSQL


Linux, Storyblok


Front-end, Front-end Development, Presentations, Apple Pay, Google Pay, Teams, Fintech, Storybook, Gatsby, Front-end Design, Front-end Architecture, CSS3 Animation

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