Marcin Zbijowski, Developer in Kraków, Poland
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Marcin Zbijowski

Verified Expert  in Engineering

Front-end Developer

Kraków, Poland
Toptal Member Since
March 13, 2014

Marcin is a developer with a proven track record of applications tailored to clients' needs and expectations. He has extensive experience and skill with multiple technologies, but programming has been his passion since he was a little kid with Commodore64 and his first computer magazine at hand.


Talent Alpha
Amazon Web Services (AWS), Bitrise, GitLab, React Native, Angular
Brickendon Consulting
Ionic, Angular, TypeScript
React, Angular, TypeScript, Swift




Preferred Environment

React, Angular, Front-end

The most amazing... I've implemented was featured in "New & Noteworthy" section of the App Store and also on British national TV.

Work Experience

Senior Front-end Developer

2019 - 2020
Talent Alpha
  • Implemented an Angular-based front-end platform consuming a REST API.
  • Implemented a React Native-based mobile app with Bitrise CI configuration for automatic deploys.
  • Configured and maintained GitLab pipelines for one-click deployment.
  • Migrated successfully front-end projects from AWS/S3/GitLab Ci to Google Firebase/Github/Cloud build setup.
  • Implemented Next.js/React-based app hosted on Google Firebase.
Technologies: Amazon Web Services (AWS), Bitrise, GitLab, React Native, Angular

Tech Lead/Software Architect

2018 - 2019
Brickendon Consulting
  • Managed the team.
  • Synchronized workloads with the offshore team.
  • Implemented the mobile app in Ionic.
Technologies: Ionic, Angular, TypeScript

Software Engineering Expert - Mobile and Front-end

2015 - 2018
  • Implemented iOS apps for Voluum and Zeropark.
  • Implemented the front end of’s web panel.
Technologies: React, Angular, TypeScript, Swift

iOS Developer

2014 - 2015
Inventorum GmbH
  • Implemented new app features.
  • Refactored code from JavaScript to Swift.
Technologies: JavaScript, Swift, Objective-C

CEO, Owner

2009 - 2015
Touching IT
  • Created iOS apps for clients across the globe.
  • Managed projects consisting of apps for multiple platforms.
  • Managed a team of developers.
Technologies: AFNetworking, MapKit, RESTful Web Services, UIKit, Core Data, Objective-C

iOS Developer

2012 - 2014
Roche Pharmaceuticals
  • Developed integration with SOAP and RESTful APIs.
  • Clarified business requirements during the implementation stage.
  • Supported data administrators across Europe, East Asia, and Africa.
  • Analyzed and implemented app improvements.
  • Cooperated with back-end and data teams.
Technologies: SOQL, REST, SOAP, SQLite, Core Data, Objective-C

Senior Software Developer

2009 - 2009
MicrowebEDU BV
  • Moved functionality from an old Java base to a web application.
  • Designed and implemented new features.
  • Built a bridge between the web application and Adobe InDesign.
  • Handled IDML (Adobe format) in PHP.
  • Improved application performance.
Technologies: XML, Subversion (SVN), XHTML, MySQL, PHP

PHP Developer

2008 - 2009
TomTom International
  • Maintained the website.
  • Built new features on the website.
  • Researched possible improvements and then conducted impact analysis and implementation.
Technologies: Jira, Perforce, XHTML, MySQL, Microsoft SQL Server, PHP

PHP Developer

2007 - 2008
Complinet, Ltd.
  • Maintained and created new functionality in two projects called Policy Manager and Recordkeeper.
  • Created a back-end system to send emails when the editor has to take action (edit, approve, audit, or review) on policies.
  • Created filtered manuals so editors were able to assign taxonomy categories to manual section and then users could browse by them (which was very useful for large manuals).
Technologies: LAMP, MVC Design, Subversion (SVN), Zend Framework, PostgreSQL, Object-oriented Programming (OOP), MySQL, PHP

PHP Developer

2007 - 2007
O-Bit Telecom
  • Created a web interface for a telecom switch, adding new numbers, deleting numbers, creating divert numbers like 0800, and changing number settings.
  • Created a microsite when O-Bit bought another company. It was made for overtaken clients to help them make the decision if they want to stay or move somewhere else.
  • Created a microsite for General Motors employees.
  • Developed a price quoting module.
  • Built a new module for that allows uploading video files and converting them to FLV format using FFmpeg (open-source software for media file conversion).
  • Refactored code in
Technologies: Object-oriented Programming (OOP), MySQL, SOAP, PHP

PHP Developer

2006 - 2007
  • Created new websites for
  • Maintained websites such as,, and
  • Created small advertisements for the homepage.
  • Worked under pressure and on short deadlines.
  • Worked closely with graphic and project management teams.
Technologies: MySQL, Perl, JavaScript, PHP

PHP Developer/Team Leader

2002 - 2006
  • Made decisions about technologies and resources to use.
  • Led a small group of PHP developers, guiding them as well as teaching internal procedures and technologies.
  • Worked on a large amount of data, creating easy to use data mining scripts to extract information from database (dmoz is the largest online website directory). Those scripts were passed to non-technical people.
  • Created re-usable PHP classes to communicate with eBay API using PHP, XML, and XSLT.
  • Designed the database.
Technologies: MySQL, XPath, XSLT, XML, PHP

Voluum iOS App

Allows an easy overview of ad campaigns on the go.

ZeroPark iOS App

Allows an easy overview of ad campaigns on the go.

eRatusz Gdynia

Information app of the city of Gdynia developed for multiple platforms (iOS, Android, and Windows phone). There is also a website with a CMS to manage all data.


An app for hunters in the UK. They can store information about hunts, what and when they managed to shoot, who they were with, etc. In the upcoming release, they will be able to invite their friends through the app. The update also includes full sync via REST API to store data on the web and sync multiple devices with the same account. Available only in the UK App Store.

Wat eet NL?

Application for the web portal showing users' photos and comments on what people eat. There is JSON API integration, image cache for faster loading, and lower bandwidth usage. The app also uses the Facebook SSO feature. The app was completely rewritten from PhoneGap. Available only in the Dutch App Store.


App supporting portal where people share their references from clients. Within the app, the user can present their references either on the map or as a list. There are also features to export selected reference as PDF or to print them out.

CSS Daily

Explore a mobile catalog that holds a rolling 12 months of clear and simple stamps projects. That's a library of over 450 paper crafting ideas and it keeps growing by adding a brand new, exclusive project daily.

Talent Search on Talent Alpha
I was the lead developer for the front end part of the search on website. The project is based on a combination of Next.js/React/Firebase technologies and it was delivered on time with a couple of nice-to-have features, which were not included in the original one.
2002 - 2006

Bachelor of Science Degree in Computer Science

University of Bielsko-Biała - Bielsko-Biała


REST APIs, React, Node.js, Emotion Library, jQuery, CocoaPods


Git, Subversion (SVN), Xcode, GitLab CI/CD, Perforce, Jira, GitLab, Jenkins


JavaScript, TypeScript, HTML5, Objective-C, HTML, CSS, Swift, SCSS, Sass, PHP, SOQL, XHTML, XML, Perl, XSLT, XPath, SQL


REST, Agile Software Development, Object-oriented Programming (OOP), MVC Design


iOS, Visual Studio Code (VS Code), Firebase, LAMP, Amazon Web Services (AWS), Bitrise


JSON, SQLite, MySQL, Microsoft SQL Server, PostgreSQL


Next.js, Core Data, Angular, React Native, MapKit, AFNetworking, Zend Framework, Ionic, UIKit


Styled-components, SOAP, RESTful Web Services, Front-end

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