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Andrew Ostapchuk

@andrewostapchuk

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Tech Lead · Frontend Engineering · React & Redux Specialist · Web3 / DeFi Builder

Ukraine

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What I'm looking for

I seek a collaborative environment that fosters innovation and offers growth opportunities.

Tech lead and frontend architect with 7+ years scaling React and Next.js platforms across e-commerce, healthcare, and ed-tech — most recently leading 3 scrum teams at Abto Software. In parallel, ships independent DeFi and MEV products in Rust and TypeScript: latency-sensitive arbitrage bots across CEX, CEX-DEX, and DEX-DEX venues (powered by a self-hosted reth node), a mainnet MEV bot with revm simulation, a DeFi yield dashboard, and a freemium SaaS tool suite. Comfortable owning architecture end-to-end and turning ambiguous problems into shipped systems.

Experience

Work history, roles, and key accomplishments

Tech Lead | Senior React Developer

Abto Software

May 2025 - Feb 2026 (9 months)

Led front-end direction of 3 scrum teams, improving delivery efficiency by 50% at EDIO by architecting a custom React component library and CI/CD pipeline. Developed and maintained NPM packages and git submodules for front-end architecture, supporting 8 React projects at EDIO.

React CI CD NPM Git Submodules Storybook Vitest Coding Standards Developer Experience

Senior Frontend Engineer

TGA Digital LTD

Sep 2023 - Dec 2024 (1 year 3 months)

Shipped features for Craft Gin Club's Shopify Liquid + Vue.js e-commerce store, contributing to a 30% revenue increase in Q3 2023. Launched the EU version of Craft Gin Club, expanding the international customer base by 15% in three months.

Shopify Liquid Vue.Js Next.js React Native Xamarin Monorepo UI Components Pipelines Developer Experience

Frontend Engineer

One Logic Soft

Jul 2023 - Oct 2023 (3 months)

Led development of an e-commerce store and admin panel from scratch using Next.js, Redux, and Material UI, with i18n, canvas-based banner editing, and Google Maps polygon routing for delivery optimization.

Next.js Redux Material UI i18n Canva Google Maps API

Frontend Engineer

Binariks

Mar 2022 - Jan 2023 (10 months)

Migrated the Kineko crypto casino platform from jQuery to Next.js, modernizing performance and UX; advised business owners on crypto product decisions. Extended the YourCoach Health platform with new features under tight deadlines.

jQuery Next.js Cryptocurrency Health Tech Performance Optimization

Frontend Engineer

Starnavi

Jun 2020 - Feb 2022 (1 year 8 months)

Architected a B2C contract sharing and signing platform from scratch with a scalable codebase and full business-logic translation. Built an internal time tracker and resource wiki, and a React Native mobile app supporting volunteering efforts for homeless animals.

React Native B2C Scalable Architecture Time Tracking Wiki

Frontend Engineer

Docks

Oct 2019 - May 2020 (7 months)

Led development of multiple e-commerce platforms using React and Vue, and a real-time e-sport platform for local Dota 2 competitions.

React Vue.Js Ecommerce Real time Dashboards eSports

Frontend Engineer

Demigos

Mar 2018 - Sep 2019 (1 year 6 months)

Took a UK-market freelancer platform from inception to production, then provided ongoing support and enhancements.

Education

Degrees, certifications, and relevant coursework

Uzhhorod National University

Bachelor's degree, Computer Engineering

2014 - 2018

Completed a Bachelor's degree in Computer Engineering, focusing on the principles of computer systems, software development, and engineering practices. Developed a strong foundation in programming, algorithms, and system design, preparing for a career in technology and software engineering.