Евгеній

EUGENE BREDIUK
Senior React.js / React Native / Node.js Engineer | Full-Stack Solution Architect
Kyiv, Ukraine (UTC+3) | Remote | [open contact info](look above in the "contact info" section) | [open contact info](look above in the "contact info" section)

PROFESSIONAL SUMMARY
Senior React.js, React Native and Node.js engineer and Full-Stack Solution Architect with 11+ years of experience and 20+
production products shipped across 12 industries, including media streaming, fintech, healthcare, marketplaces and AI. Sole
architect on every recent build: designs the architecture from scratch, ships to the App Store, Google Play and the web, and
leads front-end teams of up to 10+ engineers. Mentored engineers who are seniors now. Open to remote full-time or B2B roles;
available immediately.
11+ years | 20+ products shipped | 10+ engineers led | 4-language apps | iOS, Android and web from one codebase

TECHNICAL SKILLS
Frontend: React.js, Next.js, TypeScript, JavaScript (ES6+), Redux, Redux Saga, Zustand, MobX, TanStack Query, Axios, GraphQL,
Apollo, Relay, Vue.js, Vuex, Vuetify, Angular, HTML5, CSS3, Tailwind CSS
Mobile: React Native, Expo, Expo Router, Expo EAS, NativeWind, react-native-track-player, Expo Notifications, Firebase Cloud
Messaging (FCM), fastlane, Xcode, iOS, Android
Backend and Data: Node.js, Express.js, REST APIs, OAuth2, Stripe, Firebase, MongoDB, PostgreSQL, MySQL, SQLite, Ruby on Rails
Architecture and Leadership: Solution Architecture, System Design, Technical Leadership, Team Leadership, Mentoring, Code
Review, Performance Optimization, Internationalization (i18n), CI/CD, Agile
Tools and AI: Git, Bitbucket, Jira, Trello, Zeplin, Sketch, ChatGPT API, Claude, Cursor

PROFESSIONAL EXPERIENCE

LITSLINK, Kyiv, Ukraine Oct 2017 – Present
Software Engineer at an IT outsourcing company, placed as Senior Engineer and Solution Architect on client engagements (clients
under NDA)
Senior React.js / React Native Engineer | Solution Architect: Cross-Platform Media Streaming App 2024 – 2026
Radio, podcasts, news, promotions and jobs; published on the App Store and Google Play
• Architected the product from scratch as sole architect and shipped it to iOS, Android and web from one Expo Router +
TypeScript codebase with modular feature layers.
• Cut load times noticeably by rebuilding the data layer with Axios and TanStack Query caching and pagination across all
content feeds.
• Engineered live radio streaming with background playback, a swipeable mini-player, system media controls and custom
Android media notifications (react-native-track-player).
• Implemented OAuth2 authentication with 3 social sign-in providers (Apple, Google, Facebook), persisted sessions and
profile-completeness logic.
• Localized the app into 4 languages (Serbian, English, French, German) with runtime language switching and localized API
requests (i18next).
• Delivered push notifications with Android channels and permission flows, plus a promotions and vouchers module (browse,
filter, claim, redeem).
• Built a reusable, themed component library with responsive layouts, and automated builds and store releases with Expo
EAS.
Stack: React Native, Expo (Dev Client, EAS), TypeScript, Expo Router, NativeWind, TanStack Query, Axios, Zustand, i18next, AsyncStorage

Senior React / React Native Engineer | Solution Architect: AI Voice-to-Text Platform Dec 2023 – Feb 2024
Pre-seed startup; web and mobile product converting voice recordings to text
• Architected and built the web and mobile apps in parallel from scratch, before the team hired a designer; co-designed the
UI/UX mockups.
• Integrated the ChatGPT 3.5 API into production to turn voice recordings into text.
• Ran daily build-test-learn cycles, shipping experimental features daily; earned repeated praise from the client for speed and
quality.
Stack: React, React Native, Expo, Redux, Node.js, Express, MongoDB, ChatGPT API

Senior Full-Stack Developer: Airbnb-Style Apartment Booking and Rental Platform Sep 2023 – Dec 2023
• Designed and implemented the full-stack architecture (React, Node.js, Express, MongoDB).
• Cleared the majority of the inherited bug backlog, stabilizing the product for new feature work.
• Built apartment viewing scheduling with a viewings calendar, in-app notifications, data tables and user messaging.

• Led code reviews and performance optimization across front end and back end.
Senior React.js Developer: Music-Tech Streaming and Sharing Platform Jul 2023 – Sep 2023
• Architected the web app from scratch: a custom music player with queue controller, track switching and volume controls.
• Launched premium subscriptions with role-based in-app access and a track rating system (React, Redux).
Senior Engineer | Front-End Team Lead: 14 Client Products Oct 2017 – 2022
Healthcare, fintech, HR tech, social, legal tech, energy, edtech, fitness and marketplaces
• Led a front-end team of 5+ engineers on a healthcare benefits administration and payments platform (React Native) and
mentored engineers who are seniors now; delivered document signing, crypto transaction algorithms, 3 custom navigation
types, localization, Firebase push and SMS sign-up validation.
• Led the front-end team of an IT-specialist hiring web app (Vue.js, Ruby on Rails, PostgreSQL): candidate search, advanced
filters, geofencing, hiring workflow and chat.
• Shipped a dating app (React Native, Redux Saga, Apollo GraphQL) with Apple, Facebook and Google sign-in, chat, payments,
swipe animations and fastlane CI/CD.
• Refactored a large legacy codebase of a mind-map, whiteboard and Kanban collaboration app (React Native) while adding
native features.
• Built real-time chat on FCM, a custom calendar, Stripe payments and dynamic questionnaires for a legal case management
tool (React, React Native).
• Developed audio streaming and online sample mixing for an AI music mastering platform (React, Apollo GraphQL), and error
handling, charts and data tables for a power-generation device control app (React, GraphQL, MobX).
• Also delivered a gym booking app (MobX), a doctor-matching healthcare app with a custom webpack build tool, a freelance
marketplace (Vue.js), a parent-teacher messaging platform (GraphQL, Relay) and a property app with Google Maps.
caisy.io: Frontend Web Developer (part-time) Mar 2021 – Jul 2021
MEAT Agency, Kyiv: Full-Stack Web Developer Jul 2016 – Oct 2017
Devellar: Project Manager Jan 2012 – Jun 2016

LANGUAGES
English: Fluent

EDUCATION

Master’s Degree, Computer Sciences 2007 – 2013
National Technical University of Ukraine “Kyiv Polytechnic Institute”