Frontend Software Engineer

Volodymyr S

Information

Available hours \ week
40 h/w
Seniority level
Senior
Years of experience
7 yrs.
Location
Poland
Timezone
(GMT+01:00) Warsaw

Languages

Ukrainian
Fluent (C2)
Russian
Fluent (C2)
English
Upper-Intermediate (B2)

About

Volodymyr is a Senior Frontend Software Engineer with 7 years of experience specializing in JavaScript, TypeScript, and React.js. He has effectively designed and implemented high-performance applications, enhancing user experiences and streamlining state management. He has successfully addressed complex challenges, such as introducing internationalization and improving application accessibility, while maintaining rigorous code quality through testing frameworks like Jest and Cypress. Volodymyr holds a Master’s degree in food industry technology and completed a Front End development course from Beetroot Academy.

Additional skills

Experience

Enterprise Admin Dashboard

Frontend Software Engineer

About the Project

A comprehensive ecosystem of high-performance administrative dashboards tailored for large-scale enterprise operations. The platform focuses on secure, large-scale document processing, real-time data synchronization via WebSockets, and deep business analytics. As a core part of the system, it enables administrators to manage complex workflows, monitor system health, and handle legally binding documents through integrated Digital Signatures (EDS).

  • Administration
  • Accounting
  • Analytics

Responsibilities

- Architected a high-performance ecosystem of admin dashboards using React 18 and Vite. - Integrated WebSockets and Digital Signature (EDS) for secure, real-time document processing. - Streamlined state management with Zustand, improving code maintainability. - Developed interactive business analytics using Ant Design Charts. - Ensured high code quality through rigorous ESLint/Prettier configurations and code reviews.

Skills & technologies

Smart Skills

Frontend Software Engineer

About the Project

An internal corporate ecosystem designed to streamline talent acquisition and skill management by integrating a robust personnel search engine with a Learning Management System (LMS). The platform allows HR departments and managers to identify skill gaps within the organization, track employee professional growth, and match internal candidates with open positions based on their learning progress and technical competencies.

  • Administration
  • Customer Support
  • Event Management

Responsibilities

- Complete redesign of the application, resulting in an improved user interface and enhanced user experience. - Added new functionalities to the application based on business requirements, ensuring better usability and efficiency. - Actively resolved bugs and provided support to ensure smooth project operations. - Developed comprehensive unit tests to ensure reliable functionality coverage.

Internationalization

Frontend Software Engineer

About the Project

A strategic initiative to scale its fintech services globally. The project focused on transforming a monolith-to-micro-frontend architecture to support multi-regional deployment. This involved implementing a complex localization infrastructure that handles dynamic content translation, regional currency formats, and legal compliance displays across various markets, ensuring a native-like experience for a diverse international audience.

  • Fintech

Responsibilities

- Implemented internationalization functionality in the user interface by translating strings into multiple languages. - Ensured the application displayed content in the appropriate language based on the user's location. - Enhanced the user experience and expanded the application's reach to a wider international audience.

Skills & technologies

Node version migration

Frontend Software Engineer

About the Project

A critical infrastructure project aimed at modernizing the backend environment and build pipelines for micro-frontend applications. The primary goal was to systematically migrate a suite of applications from legacy Node.js versions (v10, v12) to current stable versions (v14) while ensuring zero downtime and maintaining library compatibility. This migration significantly enhanced the security posture, execution performance, and developer experience across the organization.

  • Administration
  • Banking
  • Communications
  • E-commerce
  • Fintech

Responsibilities

- Successfully migrated applications from Node.js version 10 to version 12 and version 12 to version 14. - Updated and ensured compatibility of various libraries used in the applications. - Configured libraries to seamlessly work together. Improved performance, security, and stability of applications by leveraging newer Node.js versions and integrating updated libraries.

Skills & technologies

Web Accessibility

Frontend Software Engineer

About the Project

A mission-critical project aimed at bringing web presence into full compliance with WCAG standards to ensure inclusivity for all users. The focus was on re-engineering core UI components to support screen readers, implementing sophisticated keyboard navigation patterns, and optimizing color contrast and focus management. This effort not only ensured legal compliance but also significantly improved the overall UX for users with visual or motor impairments.

  • Banking
  • Customer Support
  • E-commerce
  • Fintech

Responsibilities

- Implemented comprehensive accessibility functionality to ensure the application is fully usable for people with disabilities. - Developed and integrated keyboard navigation to enhance the user experience for non-mouse users. - Enhanced and optimized UI components specifically for accessibility, improving overall system performance. - Ensured strict compliance with WCAG standards, resulting in a seamless and inclusive user interface. - Conducted thorough accessibility testing and analysis using specialized tools to identify and resolve barriers. - Collaborated within a micro-frontend architecture to maintain consistent accessibility standards across different application modules.

Skills & technologies

Marketplace admin

Frontend Software Engineer

About the Project

A sophisticated internal management platform designed to provide employees with powerful tools for overseeing and configuring the marketplace ecosystem. The application serves as a mission-control center for managing merchant data, auditing transactions, and fine-tuning marketplace parameters. It bridges the gap between complex business requirements and operational efficiency through a streamlined, high-performance user interface.

  • Administration
  • Accounting
  • Banking
  • Customer Support
  • E-commerce
  • Fintech

Responsibilities

- Developed and implemented new features based on business requirements. - Conducted bug fixing activities for optimal functionality and user experience. - Provided ongoing support and improved application performance. - Collaborated with cross-functional teams to iterate on UI/UX enhancements. - Wrote comprehensive unit tests using Jest and performed end-to-end testing with Cypress. - Maintained code quality through code reviews and adhered to best practices. - Actively contributed to discussions for innovation and improvement.

Band

Frontend developer

About the Project

A multi-functional social and e-commerce platform designed to bridge the gap between musical artists and their global fanbase. The application combines a niche marketplace for exclusive merchandise with social features, including a real-time messenger for direct fan-to-artist interaction. The project required a highly interactive UI to manage media content, storefronts, and live communication streams.

  • Communications
  • EdTech
  • Electronics
  • Energy
  • Entertainment
  • Event Management
  • Fashion
  • Telecommunications

Responsibilities

- Implemented responsive layouts based on design specifications for seamless user experience across devices. - Created and integrated new modules to enhance functionality and usability. - Conducted thorough bug fixing and troubleshooting to improve stability and performance. - Wrote clean and maintainable code according to customer requirements and linter rules. - Actively participated in code reviews, providing constructive feedback and suggestions.

Pitch59

Frontend developer (Flutter)

About the Project

An innovative mobile recruitment platform that redefines the job-seeking experience by allowing candidates to "pitch" themselves to employers through short, high-impact video introductions. Unlike traditional text-heavy job boards, this application focuses on personality and communication skills, featuring location-based job discovery via Google Maps integration and a streamlined interface for both iOS and Android users to manage their professional pitches and applications.

  • Administration
  • Analytics
  • Business Intelligence
  • Event Management
  • Human Resources
  • Information Services
  • Management
  • Social Media
  • Social Services

Responsibilities

- Developed user-friendly frontend application for IOS and Android platforms using Dart and Flutter. - - Created and integrated new modules. - Integrated Google Maps API to provide location-based services within the app. - Conducted bug fixing, troubleshooting, and code refactoring for improved stability, performance, and code quality.

Skills & technologies

STEMI

Frontend developer (React Native)

About the Project

A life-saving telemedicine platform developed to optimize the "Golden Hour" for patients suffering from acute myocardial infarction and strokes. The application facilitates instant communication and data exchange between paramedics in the field and specialists (cardiologists, neurologists) in hospitals. By streamlining the diagnostic and notification process through real-time push notifications and data visualization, the system significantly reduces the time-to-treatment for critical patients.

  • Administration
  • Data Analytics
  • Healthcare

Responsibilities

- Developed the front-end of a web application using React Native. - Integrated Firebase Cloud Messaging (FCM) for real-time push notifications. - Conducted code refactoring to enhance code structure and maintainability. - Created new modules to expand the functionality of the application.

Education

Odesa National Academy of Food Technologies (ONAFT)

1999 - 2004
Master in food industry technology