Wojciech Skowronek, Software Developer in Gdynia, Poland
Wojciech Skowronek

Software Developer in Gdynia, Poland

Member since August 27, 2014
Wojciech is a full-stack web developer with over eleven years' experience creating fast and efficient applications for mobile, desktop, and web platforms. As an entrepreneur, he understands the importance of big-picture thinking, especially during the implementation of daily tasks, and is able to manage and lead remote teams. As an engineer, he prides himself on writing clean, readable, and easily maintainable code.
Wojciech is now available for hire


  • Karius
    Auth0, Scala, Python, Node.js, GraphQL, PostgreSQL, TypeScript, JavaScript
  • FEM, Inc.
    WordPress, PHP, CSS3, HTML5, Video.js, Node.js, React, JavaScript
  • Bushido Games
    FRAPI, MySQL, PHP, CSS3, HTML5, Node.js, JavaScript



Gdynia, Poland



Preferred Environment


The most amazing...

...project I've created is a social game, Square Solitare Duel, that engages thousands of players every day.


  • Senior Software Engineer

    2017 - 2019
    • Worked with multiple services which covers the whole lab process, from placing an order through data analysis and reporting.
    • Created a data visualization dashboard for presenting data in an attractive way, with advanced charting in d3.js.
    • Integrated a third-party laboratory information management system (Clarity LIMS) with company infrastructure.
    • Created a microservice for quality control with Scala and REST API.
    Technologies: Auth0, Scala, Python, Node.js, GraphQL, PostgreSQL, TypeScript, JavaScript
  • Senior JavaScript Developer

    2015 - 2017
    FEM, Inc.
    • Created a cross-platform video widget for embedding on partner pages. The widget integrates with multiple players and supports video recommendations, surveys, and CTAs.
    • Created Prizma Player, a video player based on Video.js framework to serve video materials on partner pages.
    • Created a dashboard for presenting statistics of played videos, including graphs, tables, search and more, in React.
    • Created a WordPress plugin for the widget for quick and easy integration with any blog.
    Technologies: WordPress, PHP, CSS3, HTML5, Video.js, Node.js, React, JavaScript
  • CTO, Senior JavaScript Developer, and Team Leader

    2010 - 2016
    Bushido Games
    • Designed database architecture.
    • Managed the funding, estimating, and planning of projects.
    • Developed back-end services and created cross-device and cross-browser responsive games.
    • Optimized JavaScript and database queries, as many of our games were prepared to handle a large number of users.
    • Created part of the UX and gameplay for the games.
    • Worked with Google Analytics and Google Adsense, integrating the games with different APIs (OpenSocial platforms, Softgames, Spil Games, and Booster Media).
    • Organized and managed the team, made hiring decisions, and conducted team building.
    Technologies: FRAPI, MySQL, PHP, CSS3, HTML5, Node.js, JavaScript
  • Senior JavaScript Developer

    2009 - 2012
    Nokia Gate5 GmbH
    • Developed the part of the front-end of Nokia Maps for desktops responsible for handling information about places displayed on the map.
    • Created a front-end for Places API, a library that can be easily embedded in any website to display a Nokia Maps widget.
    • Built a front-end template system for handling a JSON REST API more efficiently.
    • Programmed an HTML5 mobile version of Nokia Maps dedicated for iOS and Android smartphones that worked directly from the mobile browser and as a native app.
    • Improved the JavaScript performance of an HTML Places widget integrated with a native Symbian application (C++).
    Technologies: Jira, Maven, CSS3, HTML5, JavaScript
  • Co-Founder and Lead Developer

    2008 - 2012
    Justproto.com (Predecessor of Uxpin.com)
    • Created an advanced web application for designing wireframes and prototypes.
    • Handled a real-time user collaboration system (n:n) to synchronize work for all connected clients.
    • Implemented Optimizely for A/B testing.
    Technologies: CSS, HTML, MySQL, PHP, JavaScript
  • Web Application Specialist and Project Manager

    2006 - 2009
    • Developed an application for handling logistics for small hydro plants, including schedules, notifications, and alarm systems.
    • Managed a team of developers, prepared estimations of projects, and handled communication with clients.
    • Built multiple web applications for the company's clients.
    Technologies: JavaScript, CSS, HTML, PHP


  • Prizma Widget

    Front-end part of a video engagement platform, which allows embedding of videos on any web page. It includes custom video player, multiple layouts, surveys, CTAs, and a tracking system. Thanks to modular construction, it's possibile to use it in two modes, with and without UI.

  • Prizma Dashboard

    A web application that helps people browse through video engagement statistics. The user can filter data, compare with different periods, upload new video directly to the Amazon S3 bucket, and search the database. The app is written with React.js.

  • HTML5 Nokia Maps App

    An advanced maps application for mobile devices (iOS, Android) developed with JavaScript and HTML5. It covers geolocation, voice guidance, canvas path drawing, and other features. I was part of the development team responsible for the front-end.

  • Pecunia Research

    Platform for checking, comparing, and switching though Australian retirement funds. I was responsible for inventing and implementing a way to visualize thousands of records on a single page, which was achieved using D3.js library. Data was processed by AWS Lambda and provided through AWS API Gateway.

  • Square Solitaire Duel

    A multiplayer social media game, based in JavaScript and HTML5 on the front-end and PHP and MySQL on the back-end, that enables players to challenge each other in a square solitaire game. Desktop and cross-browser versions are available on Facebook and other social networks.

  • Monster Keeper

    An HTML5 free-to-play manager game. It includes a REST API, in-app purchases and efficient database handling. The game is targeted and optimized to run on mobile devices (iOS, Andorid, BlackBerry).

  • Bushido Games

    I worked on a number of projects at Bushido as a developer, game designer, and project manager with a team of up to seven people.

  • Working with Google Sheets and Apps Script (Publication)
    It’s easy to start working with a spreadsheet, but it also takes time to master your skills to use all the powerful features it provides. When you start feeling comfortable with formulas, functions, pivot tables, etc., there is still one more level which allows you to achieve even more—custom extensions. In this article, I’m going to focus on extending Google Spreadsheets with a Google Apps Script that validates European Union VAT IDs via API calls.
  • Toptal Mentor
    Wojciech is a mentor in the Toptal Global Mentor’s Program. This program is a partnership between Toptal and General Assembly to provide high quality mentorship for students from minority and low income backgrounds who are looking to begin their careers as professional software engineers. Wojciech shows commitment to diversity in tech by mentoring a General Assembly student every week for a year, covering everything from coding tips and tricks to advice on making it in the industry.


  • Languages

    JavaScript, HTML5, CSS3, GraphQL, PHP, HTML, CSS, TypeScript, Python, Scala
  • Frameworks

    Redux, Video.js, Vanilla JS, Swagger, React Native, Selenium, FRAPI
  • Libraries/APIs

    React, Node.js, Puppeteer, D3.js
  • Paradigms

    REST, Scrum, Agile Software Development
  • Platforms

    iOS, Docker, Amazon Web Services (AWS), Linux, WordPress
  • Storage

    Memcached, MySQL, PostgreSQL
  • Tools

    Git, Webpack, Maven, Jira, Auth0
  • Other



  • Bachelor’s degree in Algorithms and Programming
    2006 - 2009
    The University of Gdańsk - Gdańsk / Poland

To view more profiles

Join Toptal
Share it with others