I’m Aleksei Zelenskii, a frontend and React Native engineer with 6+ years of experience building production web and mobile applications. For the past 3+ years, I’ve owned the mobile platform of a US group-travel marketplace, helping serve 3M+ users across 50+ cities with a React Native (Expo) app plus a Next.js marketplace and React partner portal in a Turborepo monorepo.

Aleksei Zelenskii

I’m Aleksei Zelenskii, a frontend and React Native engineer with 6+ years of experience building production web and mobile applications. For the past 3+ years, I’ve owned the mobile platform of a US group-travel marketplace, helping serve 3M+ users across 50+ cities with a React Native (Expo) app plus a Next.js marketplace and React partner portal in a Turborepo monorepo.

Available to hire

I’m Aleksei Zelenskii, a frontend and React Native engineer with 6+ years of experience building production web and mobile applications. For the past 3+ years, I’ve owned the mobile platform of a US group-travel marketplace, helping serve 3M+ users across 50+ cities with a React Native (Expo) app plus a Next.js marketplace and React partner portal in a Turborepo monorepo.

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Experience Level

Expert
Expert
Expert
Expert
Expert
Expert
Intermediate
Intermediate
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Language

English
Advanced
Russian
Fluent

Work Experience

Frontend Developer at Batch (letsbatch.com)
November 1, 2022 - Present
Sole frontend engineer across three products in one Turborepo monorepo with 16+ shared packages: a React Native (Expo) app, a Next.js marketplace, and a React partner portal. Owned the mobile platform for a US group-travel marketplace serving 3M+ users, delivering social planning features (party hub, event calendar with RSVPs, guest management, polls, shared expenses) and end-to-end discovery and booking (map-based search and filters, real-time availability, request-a-quote, Stripe checkout). Led app-wide redesigns and major upgrades (New Architecture, Hermes), improved push notifications and deep linking pipelines, and tuned rendering performance. Built partner tooling including tier-gated modules, onboarding flows, CSAT survey, HubSpot scheduling, and a media library with UGC workflows and listing creation; also contributed to Next.js listing detail/booking UX with SSR cache invalidation and city-aware partner filtering.
Frontend / Mobile Developer at Technologika (Businessware Technologies Inc.)
March 1, 2021 - November 1, 2022
Developed and supported client-side mobile applications in React Native and Flutter, including architecture design from scratch. Optimized application performance using Hermes tooling, led refactoring and UI updates, and participated in code reviews. Also built React web applications such as an internal admin panel and a mail-client module for employees.
Frontend Developer at Webitori
September 1, 2020 - March 1, 2021
Developed web and mobile applications from scratch and helped choose core technologies for a mobile app. Worked with TypeScript, React, React Native, Redux, MobX, styled-components, and WebSocket-based integrations.
React Native Developer at CES
December 1, 2019 - September 1, 2020
Developed and ported mobile applications, working on both the client side and server request handling using React Native, Redux, and React Hooks.

Education

Specialist Degree, Computer Software Engineering at Siberian State University of Telecommunications and Information Science
January 1, 2020 - January 1, 2023

Qualifications

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Industry Experience

Travel & Hospitality, Software & Internet