Олександр

Oleksandr Bredun
Frontend Developer
Email: [open contact info](look above in the "contact info" section)
Telegram: lexhetley
LinkedIn: oleksandr-bredun
WebSite: hetley.vercel.app

Technologies
TypeScript, JavaScript (ES6+), Angular, RxJs, NgRx, React, NextJS, NodeJS, Redux / Redux Toolkit, Redux Thunk,
Zustand, React Query, Axios, React Hook Form, Formik, Zod, SASS/SCSS, styled-components, CSS Modules,
Tailwind, Material UI, Ant Design, Storybook, React Testing Library, Jest, WebSockets, ESLint, Prettier, Vite,
Webpack.

Frontend Developer — Your Next Agency, Amsterdam
June 2024 – May 2026 (1 year 11 months)

•I developed a telemedicine service with a full-cycle support system for both patients and healthcare providers.
The platform included appointment scheduling and online consultation management, an electronic medical records
and document workflow module, a payment processing and insurance verification system, as well as an
administrative panel for managing users, services, roles, and access permissions. The product gained traction in the
U.S. market and was presented at the White House.

•I created an interactive service for custom image generation tailored to client needs, with flexible parameter
configuration and adaptability for various business use cases. Additionally, I developed a universal widget based
on the core service logic that can be integrated into any external project via CDN without additional setup.

•I developed two applications focused on comprehensive relationship improvement for families and couples,
sharing 90% of the same business logic. I designed the architecture using Git submodules, extracting the shared
functionality into a separate repository. Thanks to this approach, the second product was released almost
immediately after the first launch. I also fully refactored the legacy part of the application by rewriting the
codebase from class-based components to functional components and introducing modern React features. The
refactoring reduced the overall codebase size by half.

Frontend Developer — Siema Tech, Tel Aviv
September 2022 – May 2024 (1 year 9 months)

•I developed a high-load geospatial service for real-time monitoring and tracking of targeted land plots. I
implemented dynamic geodata updates, calculation and analytics tools, as well as performance optimizations for
working with map layers. The solution significantly accelerated the initial data collection process and improved
decision-making at the early project design stage.

•I developed a management system for the company’s irrigation projects, covering the full lifecycle of working with
project documentation and equipment selection. I implemented a user-friendly and high-performance interface for
handling complex tabular data, introducing virtualization to significantly speed up data preparation for the design
process.

•I completely redesigned and optimized an existing legacy project for calculating irrigation system parameters. I
modernized the architecture, improved the calculation algorithms, and refactored the data handling processes. As a
result, redundant computations were reduced and overall application performance was improved, increasing
calculation speed by 30%.