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Professional Collaborations

My Contributions to Innovative Digital Products

Software Engineer

October 2024 - Present

Estrella Jewels

Warsaw, Poland

  • Developed a scalable dashboard application with multiple feature modules, including data visualization, file management, reporting, and handling large datasets for viewing and exporting.
  • Implemented multi-format report exports for diverse business requirements.
  • Optimized the user interface for smooth performance, ensuring minimal lag when managing large data volumes and enhancing user satisfaction.
  • Improved application reliability and usability through various enhancements.
  • Focused on frontend performance optimizations, including code refactoring and efficient algorithms for seamless data-heavy operations.
  • Integrated LLM to enhance user experience with intelligent and intuitive interactions.
  • React.JS
  • Typescript
  • Tailwind CSS
  • Redux
  • NodeJS
  • ExpressJS
  • SQL
  • nginx
  • Github CI/CD
  • RESTful APIs
  • Sequelize
  • LLM
  • System Design

Frontend Engineer

October 2021 - September 2024

BETFAN

Warsaw, Poland

  • Actively contributed to the development lifecycle by engaging in analysis, technical design, time estimation, and the implementation of both Frontend and Backend components for various features. Ensuring a smooth development process and the timely delivery of high-quality features.
  • Delivered responsive, cross-browser-compatible features based on Figma mockups, ensuring smooth UX across a range of devices and platforms.
  • Enhanced user engagement by implementing advanced betting functionalities and managing complex states using Redux as a global application state.
  • Created and standardized a set of React-Typescript components, achieving a significant reduction in development lead time and promoting cohesive design and uniformity across applications.
  • I took ownership of critical features within the app, managing key functionalities and serving as the primary point of contact for development, reporting, and troubleshooting
  • Implemented Google Analytics tracking campaigns to capture user insights across key areas of the app, delivering actionable data for both Acquisition and Retention strategies.
  • Add A/B tests on features to optimize frontend design decisions and improve user Retention rates.
  • Leveraged modern development tools such as ESLint and Prettier to enforce coding standards and best practices, ensuring that the codebase remained clean, readable, and maintainable.
  • Regularly participated in code reviews, sharing best practices, which helped to maintain high code quality and development.
  • ReactJS
  • Typescript
  • Redux
  • SCSS
  • Tailwind CSS
  • NestJS
  • Github CI/CD
  • PWA
  • SEO
  • JIRA
  • RESTful APIs
  • Storybook
  • Figma
  • PostgreSQL
  • Sequelize
  • A/B tests

FQA Tester

Jun 2021 - Oct 2021

Testronic

Warsaw, Poland

  • Responsible for performing end-to-end testing of new features before the deployment.
  • Verifying, performing and creating different check plans.
  • Testing UI/UX across various platforms.
  • Jira
  • Test Plans

Freelance Web Developer

Jan 2021 - Jun 2021

Warsaw, Poland

  • Developed websites for businesses with HTML, CSS, JavaScript, and WordPress (with a ready template)
  • Maintaining the website previously created to add or change the textual details, additional forms, layout changes & adding responsiveness
  • created and administered websites for businesses, empowering them to establish a solid online presence and enhance their business operations
  • HTML
  • CSS
  • Javascript
  • ReactJS
  • SEO