Leading the development of the Design System and Data Visualization libraries used in Aize applications.• Crafting a unified and consistent user experience across products by creating and refining design patterns, components, and guidelines.• Collaborating with cross-functional teams, including designers, developers, and product managers, to ensure efficient and cohesive development processes.• Contributing to enhancing the quality and usability of Aize products.• Mentoring and guiding fellow engineers, cultivating a culture of collaboration.

Building a scalable system that allows to easily run Angular pages with content served by a decoupled Drupal with the JSON:API protocol.• Designing and implementing a solution that allows to create customized landing pages in Drupal CMS and dynamically render them in an Angular application.• Developing an e-commerce module integrated with internal and external services such as Salesforce, Adyen or Klarna.• Improving the branching and release workflows.• Optimizing the application in terms of performance and accessibility.• Collaborating with business and team members in order to provide the most valuable product.• Working together with UI/UX designers on the implementation of the design system.

Development of a portal and e-commerce platform for electric car users for an international oil company. My responsibilities include:• Creating new functionality with emphasis on increasing product usability.• Building a responsive user interface with a focus on mobile devices.• Close cooperation with UI/UX designers.• Participation in the REST designing process.

• Developing business applications and tools for company clients (i.e. Credit Suisse).

• Built a web-based user interface for LogZilla 5 capable of processing huge volumes of data (up to 1M events per second) and rendering the results in real time.• Provided code performance and user experience improvements.• Led and mentor an application development team.• Collaborated with backend developers team at improving communication performance between server and client.

• Led and managed web and interactive projects for the company's clients, including landing pages, cultural events' websites, social games integrated with Facebook, custom e-learning platforms, and many others.• Provided support for websites maintained by the company.• Built tools for monitoring the activity and health of internal systems.• Improved developers' efficiency through training them in new technologies and modern programming techniques.Major clients: Nowe Motywacje, Digart.pl, nazwa.pl, Onet, LexisNexis, evercare.

Major clients:• online shops (Be-Mag, Snapbox, Fandango Records), • music artists (Miuosh, Lilu, Believe, Decybele Dizajnu), • sportsmen (Szczepan Karpiel-Bułecka, Bartek Sibiga, Tomasz Kwiecień), • fashion and graphic designers (The Hive, Aaaghr, From Froggy With Love, Admirable, CustomTop).

• Designed and built a dedicated development platform with rich content management system focused on stability, optimization and easy extending.• Deployed websites for company clients.

• Created a scalable e-commerce platform running the company's online shops (Hedonskate, Bladeville, and TwoTip).• Design an optimized store database with shared stock inventory.• Developed full-text search system based on Sphinx.• Implemented a stock quote SOAP web service and integration with external APIs, e.g. Braintree, UPS, InPost.• Improved sites SEO under the guidance of Google experts.• Coded a variety of tools for maintaining, extending and enhancing security.