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I'm a senior front-end and mobile developer with a passion for building scalable, cross-platform applications using React and React Native. I collaborate closely with designers and product teams to deliver delightful user experiences and robust architectures. Over my career I've shipped fintech, e-commerce, and media apps across web and mobile, led code reviews, built reusable UI components and APIs, and mentored teammates to boost development speed and quality.…I'm a senior front-end and mobile developer with a passion for building scalable, cross-platform applications using React and React Native. I collaborate closely with designers and product teams to deliver delightful user experiences and robust architectures. Over my career I've shipped fintech, e-commerce, and media apps across web and mobile, led code reviews, built reusable UI components and APIs, and mentored teammates to boost development speed and quality.

Denys Bohatyrchuk

Front-End Developer, Back-End Developer, App Developer, +2

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I'm a senior front-end and mobile developer with a passion for building scalable, cross-platform applications using React and React Native. I collaborate closely with designers and product teams to deliver delightful user experiences and robust architectures. Over my career I've shipped fintech, e-commerce, and media apps across web and mobile, led code reviews, built reusable UI components and APIs, and mentored teammates to boost development speed and quality.…I'm a senior front-end and mobile developer with a passion for building scalable, cross-platform applications using React and React Native. I collaborate closely with designers and product teams to deliver delightful user experiences and robust architectures. Over my career I've shipped fintech, e-commerce, and media apps across web and mobile, led code reviews, built reusable UI components and APIs, and mentored teammates to boost development speed and quality.

Available to hire

I’m a senior front-end and mobile developer with a passion for building scalable, cross-platform applications using React and React Native. I collaborate closely with designers and product teams to deliver delightful user experiences and robust architectures.

Over my career I’ve shipped fintech, e-commerce, and media apps across web and mobile, led code reviews, built reusable UI components and APIs, and mentored teammates to boost development speed and quality.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Language

Ukrainian

Fluent

English

Fluent

Russian

Fluent

Work Experience

Lead React/React Native Developer at Under NDA (Public Security app)

December 1, 2020 - April 1, 2022

Led the mobile development team, coordinated feature delivery and technical direction across the project. Mentored a developer transition from C# to React Native, providing guidance on architecture, best practices, and mobile-specific concepts. Designed and delivered feature-rich cross-platform mobile applications with a focus on scalability, performance, and user-centric design. Developed a custom native audio manager to regulate audio input and output, ensuring optimal performance for security-critical scenarios. Built a persistent Bluetooth management system for seamless interaction with multiple Bluetooth devices, incorporating advanced logic for reliable connectivity and device state handling. Added functionality for remote control of third-party devices via hardware integrations and ensured thorough code reviews to maintain quality. Technologies used: React Native, Expo, Kotlin, Swift, Java, Objective-C.

Senior React Native Developer at Velas Network AG

April 1, 2022 - April 1, 2023

Project Bit Orbit / Velas. Began as an aggregator of social networks and evolved into a unified platform with NFT marketplaces. Implemented native bridges, integrated REST APIs, and supported cross-platform mobile banking flows. Collaborated closely with web and mobile teams to align architecture and ensure consistent user experience across platforms. Built a reusable network layer library to enable cross-project reuse and improved maintainability.

Junior Front-End Developer at Appfox

February 1, 2019 - November 1, 2019

Project: Vznaniya. Contributed to scalable and secure web/mobile front-end development, implementing UI components and collaborating on code reviews to ensure quality across platforms.

Middle Front-End Developer at SEDNA Software

November 1, 2019 - December 1, 2020

Project: Virpp. Delivered cross-platform web/mobile applications, contributed to architectural decisions, and implemented unit tests to improve reliability and performance.

Senior Front-End Developer at Andersen Lab

November 1, 2019 - December 1, 2020

Project: First Bank Nigeria, Verve Life. Contributed to React Native mobile banking apps for African markets, built a native bridge for a third-party SDK, integrated REST APIs, and implemented offline data handling for secure, reliable user experiences.

Senior Front-End Developer at Genius E

December 1, 2019 - April 1, 2020

Led front-end development for fintech-related projects, implemented scalable UI architecture, and mentored junior developers. Contributed to cross-platform strategies and component libraries to accelerate delivery.

Senior React Native Developer at Velas Network AG

December 1, 2020 - April 1, 2022

Led cross-platform mobile development for Bit Orbit and Velas projects. Built reusable components, implemented offline data synchronization, and established testing strategies across React Native apps.

Lead React/React Native Developer at ICEO - Venture Builder

April 1, 2022 - Present

Project Be One: designed and implemented cross‑platform mobile banking apps using React Native (Expo). Enabled secure API client generation and integrated Apple Pay/ Google Pay. Collaborated with teams to align architecture and UX across platforms.