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Maksym Kostenko

@maksymkostenko

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Senior Frontend Developer specializing in React and React Native, building performant cross-platform user experiences.

Ukraine

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What I'm looking for

I seek a product-focused role where I can own frontend architecture, improve performance, mentor engineers, and build cross-platform React experiences.

I am a creative, detail-driven Senior Frontend Developer with deep expertise in React and React Native, focused on crafting sleek, responsive user interfaces and turning complex ideas into intuitive experiences.

I have led frontend efforts across PWAs and mobile apps, owned end-to-end React frontends, implemented auth and observability, built release pipelines, and optimized app performance—reducing hot-load and screen-load times significantly.

I collaborate closely with product and backend teams, mentor engineers, and drive product-focused frontend decisions while working with modern stacks including TypeScript, Capacitor, Firebase, GraphQL, AWS, and testing/CI tools.

Experience

Work history, roles, and key accomplishments

Senior FrontEnd Developer

NDA Company

Apr 2025 - Apr 2025 (0 months)

Sole owner of the React frontend (PWA + Capacitor) and built iOS/Android release pipelines, implemented auth (Clerk) and observability (Sentry), and delivered offline-first PWA functionality migrating from IndexedDB to SQLite.

React TypeScript Capacitor PWA IndexedDB Clerk Sentry AWS

Senior FrontEnd Developer

Baby Journey

Jan 2023 - Apr 2025 (2 years 3 months)

Designed and developed cross-platform mobile features using React Native and Firebase, improved app hot loading time from 8.3s to 3.4s and average screen load from 1.5s to 0.6s, and led performance and architecture optimizations.

React Native React Firebase TypeScript Jest Tanstack Query Reanimated CI CD Docker

Senior FrontEnd Developer

MEH Platform

Jan 2021 - Jan 2023 (2 years)

Built and maintained responsive React web interfaces, engineered scalable Redux architecture with Redux Toolkit, implemented payments via MonoBank API, and led reusable component library and design system efforts.

React React Redux JavaScript SCSS Ant Design Axios Docker

Middle FrontEnd Developer

Towo Labs

Jan 2020 - Jan 2021 (1 year)

Developed features and maintained React Native applications, contributed to test coverage with Jest and Detox, performed bug fixes and code reviews, and presented demos to stakeholders.

React Native TypeScript MobX Jest Detox CI CD