Piotr is available for hire
Hire PiotrPiotr Ojrzyński
Verified Expert in Engineering
Software Developer
Wrocław, Poland
Toptal member since December 16, 2015
Bio
Piotr has more than nine years of experience as a JavaScript developer. He is also experienced with back-end programming (PHP), and the design and implementation of databases (MySQL). The types of jobs he would like to work are those that involve the front-end especially using React. Piotr loves to write code cleanly, is detail-oriented, and can build applications from scratch. He is personable, professional, and a great communicator.
Portfolio
Entwicklungspark AG
HTML5, Next.js, Styled-components, Redux-Saga, Redux, React
REDFOSS Piotr Ojrzyński
ECMAScript (ES6), PostgreSQL, MySQL, PHP, CSS3, HTML5, Redux, React...
Enclaves.io
Stylus, HTML5, Jest, Socket.IO, Node.js, Smart Contracts, Web3.js, MetaMask...
Experience
- JavaScript - 11 years
- Figma - 3 years
- React - 2 years
- ECMAScript (ES6) - 2 years
- Redux-Saga - 2 years
- TypeScript - 2 years
- Redux - 2 years
- Socket.IO - 1 year
Availability
Part-time
Preferred Environment
Git, MacOS
The most amazing...
...thing I've created was the JavaScript-based UI for a browser game named Tanadu; there I optimized the code to run on multiple browsers and added new features.
Work Experience
Experienced React/Redux Developer
2018 - PRESENT
Entwicklungspark AG
- Developed a platform for online TV aimed at the Swiss market, Wilmaa.com.
Technologies: HTML5, Next.js, Styled-components, Redux-Saga, Redux, React
Owner | Developer
2008 - PRESENT
REDFOSS Piotr Ojrzyński
- Developed and created new projects for clients.
- Researched and met clients' requirements for project needs.
Technologies: ECMAScript (ES6), PostgreSQL, MySQL, PHP, CSS3, HTML5, Redux, React, Backbone.js, JavaScript
Software Engineer
2018 - 2018
Enclaves.io
- Created the architecture and developed the system for a digital asset exchange.
Technologies: Stylus, HTML5, Jest, Socket.IO, Node.js, Smart Contracts, Web3.js, MetaMask, Redux-Saga, Redux, React
Senior JavaScript Developer
2016 - 2017
Matchbyte Consultants
- Developed an interactive real-time configurable booking engine system.
Technologies: React, Marionette.js, Backbone.js, JavaScript
Senior JavaScript Developer
2015 - 2017
Nicho
- Created and developed a system to collect, organize, and display posts from social media on the customer's own website, Nicho.com.
Technologies: Less, CSS3, HTML5, Backbone.js, JavaScript
Senior JavaScript Developer
2013 - 2015
MyCrowd
- Developed a bug-reporting tool which can be displayed directly on the tested website.
- Created and developed MyCrowd products.
Technologies: Ruby, CSS3, HTML5, Backbone.js, JavaScript
JavaScript Developer
2010 - 2013
Netstellar
- Developed a system based on the Ext JS framework.
- Created new features for existing apps.
- Extended Ext JS with custom functionalities.
Technologies: CSS, HTML, Ajax, JSON, JavaScript, Ext JS
JavaScript Developer
2009 - 2010
Can’t Stop Games
- Developed the graphical user interface of the game Tanadu using pure JavaScript (without external libraries).
- Created customized libraries and optimized code.
- Wrote adaptation code for browsers like Firefox, IE 7/8, Safari, and Chrome in order for the apps to run smoothly on multiple browsers.
Technologies: CSS, HTML, Ajax, JSON, JavaScript
PHP Developer | Senior PHP Developer | Team Manager
2006 - 2008
Interactive Marketing Partner
- Developed websites in PHP and PostgreSQL based on Jet.CMS.
- Provided support for the Jet.Mail system.
- Managed a team consisting of six people (one graphic designer, three PHP developers, and two testers).
- Led, managed, and created projects for clients.
Technologies: MySQL, PostgreSQL, JavaScript, CSS, HTML, PHP
Experience
Tanadu
This is a browser game that was built in pure JavaScript.
Work Done:
• Adapted the game to multiple browsers (Firefox, IE7/8, Safari, and Chrome).
• Implemented new features.
• Optimized the code.
Work Done:
• Adapted the game to multiple browsers (Firefox, IE7/8, Safari, and Chrome).
• Implemented new features.
• Optimized the code.
Feedmill
Feedmill allows us to manage feeds. It takes feeds from different sources and propagates them to websites. The application is based on an Ext JS framework.
Work Done:
• Developed the base of the Ext JS functionalities
• Built some specific features such as managing the images (cropping, resizing) and so on.
• Added custom drag-n-drop behavior.
• Handled the state of the application (so that the user can see the same arrangement before they closed the browser).
Work Done:
• Developed the base of the Ext JS functionalities
• Built some specific features such as managing the images (cropping, resizing) and so on.
• Added custom drag-n-drop behavior.
• Handled the state of the application (so that the user can see the same arrangement before they closed the browser).
Nicho
A tool to collect, organize, and display content from the customers on the user's website.
MyCrowd
A bug reporting tool which can be displayed directly on the tested website.
The TypingCat
https://thetypingcat.comAn online keyboard touch-typing tutor.
Technologies: ES6, React, Redux, Redux Saga, Node.js, MySQL, Socket.io, HTML5, Stylus
Technologies: ES6, React, Redux, Redux Saga, Node.js, MySQL, Socket.io, HTML5, Stylus
System for Online Cryptocurrency Exchange
For this project, I created the architecture and developed a system for digital asset exchange.
Technologies: React, Redux, Redux Saga, Metamask, Web3.js, Smart Contract, Node.js, Socket.io, Jest, HTML5, Stylus
Technologies: React, Redux, Redux Saga, Metamask, Web3.js, Smart Contract, Node.js, Socket.io, Jest, HTML5, Stylus
Education
2007 - 2008
Completed Credits towards a Degree in Information Technology Management System and Design
Warsaw School of Economics - Warsaw, Poland
2001 - 2006
Master's Degree in Mathematics and Computer Science
University of Wrocław - Wrocław, Poland
Skills
Libraries/APIs
Marionette.js, Socket.IO, React, jQuery, Backbone.js, Redux-Saga, D3.js, Node.js, Web3.js
Tools
Adobe Photoshop, Figma, MetaMask, Git, Stylus
Languages
ECMAScript (ES6), CSS, HTML, JavaScript, PHP, TypeScript, HTML5, CSS3, Less, Solidity, Ruby
Frameworks
Redux, Bootstrap, Ext JS, Jest, Next.js, React Native, Ruby on Rails (RoR), AngularJS
Platforms
iOS, MacOS
Storage
MySQL, PostgreSQL, JSON
Other
Ajax, Machine Learning, Smart Contracts, Styled-components
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