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Artur Kalach

Senior Software Engineer

Summary

Senior Software Engineer with over 8 years of software development experience, including 5+ years specializing in React Native for high-performance and accessible mobile applications. Focused on mobile accessibility over the past 3 years, releasing well-received React Native packages, such as:

Contributed to open-source projects, including the React Native framework, enhancing functionality and advancing expertise in native components (Swift, Objective-C, Kotlin, and Java). Additionally, worked on performance optimization and security enhancements, delivering high-quality, scalable, and secure applications.


Skills Summary

Languages & Tools Experience (Years) Proficiency
JavaScript / TypeScript 7 Expert
React Native 5 Expert
React 5 Expert
GraphQL 5 Intermediate
Jest 5 Advanced
Swift 2 Novice
Java / Kotlin 2 Novice
Objective-C (ObjC) 2 Novice

Foreign Languages

  • English: B2 Proficiency

Professional Experience

Banking App

Period From (07/2025) - Present
Project Description A monorepo banking app with applications for both web and mobile platforms.
Position Key React Native Developer
Responsibilities Consulted on accessibility, researched and implemented solutions to enhance accessibility experiences, and resolved security issues to ensure compliance. Key contributions included refining screen and modal announcements, optimizing content accessibility, ensuring proper physical keyboard functionality, developing and patching native logic, and applying correct accessibility semantics to components.
Tools & Technologies React Native

Insurance App

Period From (09/2024) - To (06/2025)
Project Description An insurance application for web and mobile platforms.
Position Key React Native Developer
Responsibilities Designed and implemented web and mobile features, including a dynamic content management system optimized for scalability. Provided support for analytics system configuration and resolved security issues to enhance system integrity.
Tools & Technologies React Native, Zustand, JSONata, React Router

E-commerce App

Period From (01/2024) - To (08/2024)
Project Description A mobile assistant application designed for in-store consultants.
Position Key React Native Developer
Responsibilities Optimized performance through profiling and code refactoring, reducing bottlenecks and achieving up to a 40% speed improvement on both Android and iOS. Contributions also included conducting code reviews and facilitating performance discussions to ensure continuous improvement.
Tools & Technologies React Native, GraphQL

Life Sciences & Healthcare

Attribute Details
Period From (09/2020) - To (09/2022)
Project Description A mobile application designed to provide health services, including health tracking, health coaching, medication schedules, medication management, and integrations with third-party applications.
Position Key React Native Developer
Responsibilities - Played a key role in the project from its inception, working on a wide range of technologies, features, and application epics.
- Implemented key features such as push notifications, form handling (Formik), analytics, charts, accessibility (a11y), migrations, payment systems, and chat functionality.
- Developed native-side components and modules in Swift, Objective-C, and Java to improve application accessibility (a11y).
- Onboarded new developers, conducted interviews, transferred knowledge, and resolved technical debt.
Tools & Technologies React Native, GraphQL, Push Notifications, Firebase, React Navigation, App Insights, Azure DevOps, Jest, TypeScript, Objective-C, Swift, Java

Education

  • 2011–2014: Vocational Education in Operation of Electronic Computers / Maintenance and Repair of Computer Equipment
  • 2014–2017: Vocational Specialized Education in Information Technology and Software Development
  • 2017–2021: Completed coursework in Information Technology and Software Development (no formal degree awarded).

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