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Andrei Kologreev

@andreikologreev

Mobile developer at BILDIT who brought El Palacio de Hierro’s app crash rate below 0.1% and authored react-native-nitro-speech.

Georgia

Message

At BILDIT, I worked on the El Palacio de Hierro mobile app, which provides e-commerce and fintech services in Mexico. I migrated React Native from version 70 to 73.8, reducing the ANR rate to below 0.1%, and developed product features including recommendation carousels and biometric authorization.

I also authored “react-native-nitro-speech,” a package for real-time speech recognition. Across my work, I’ve built cross-platform products with React Native, native mobile, React for the web, and backend technologies.

Experience

Work history, roles, and key accomplishments

Lead Mobile Developer

BILDIT

May 2024 - Dec 2025 (1 year 7 months)

Led mobile development for El Palacio de Hierro, an e-commerce and fintech app with ~1M installs. Onboarded engineers, migrated React Native, and improved e-commerce and fintech features.

React Native TypeScript Firebase GraphQL SCAPI AppCenter Azure CodePush CI CD

Lead Mobile Developer

Dragon Family

Apr 2023 - May 2024 (1 year 1 month)

Led and mentored engineers, revamped workflow, and integrated third-party tools for IAP, analytics, and push notifications. Improved codebase quality and app rating.

React Native TypeScript Adapty Amplitude Adjust Smartlook OneSignal Bitrise Fastlane Firebase CI CD

Full Stack Developer

Apptivise

Jan 2020 - Apr 2023 (3 years 3 months)

Developed B2B solutions for YouTube influencers, including video players for iOS, Android, and TV platforms. Improved checkout and product pages for retail apps and designed a custom crypto wallet approach.

React Native iOS Android Web3 Cryptocurrency Ecommerce Video Player