Демид

Demyd Hanenko
Senior Frontend Developer · React / TypeScript · Spain · Open to Remote / EMEA
[відкрити контакти](див. вище в блоці «контактна інформація») · [відкрити контакти](див. вище в блоці «контактна інформація») · hanenko.com · LinkedIn · GitHub

ABOUT

Senior Frontend Engineer with 10+ years of experience building high-performance web
and mobile applications in ntech, crypto, and SaaS. Expert in React, TypeScript, and
scalable frontend architecture for high-load systems — with strong full-stack capabilities
(Node.js, Laravel, WordPress). Known for taking full ownership of frontend delivery, driving
cross-functional collaboration between design, backend, and product, and
communicating technical decisions clearly to both engineers and stakeholders. Proven
track record of real-time data processing, performance optimization, and measurable
impact on UX and delivery speed. Fully comfortable in async remote environments and
international teams.

TECHNICAL SKILLS

Core: React, TypeScript, Next.js, MobX, Redux, Zustand
Frontend: Tailwind CSS, shadcn/ui, TanStack Query, GraphQL, Framer Motion, SCSS,
Bootstrap, Webpack, Gulp, Vite, PWA
Mobile: React Native
Backend: Node.js, NestJS, TypeORM, PostgreSQL, REST API, Laravel, WordPress
DEX: Solana, Ethereum, Web3.js, Smart Contracts, DeFi
AI Tools: Cursor, Claude, Codex — MCP work ows, prompt design for code generation &
debugging
Other: Jest / Vitest, Playwright, CI/CD, Docker, Git, Jira, Figma, Agile, Scrum, i18n
English C1

EXPERIENCE

Crypto Trading Terminal (NDA) · Senior Full-stack Developer · 2023 – 2026
• Architected and led scalable frontend architecture for a real-time React +
TypeScript trading platform (40k MAU) — de ned component structure, state
management patterns, and WebSocket data pipelines
• Built high-load web app, Chrome extension, and React Native mobile app from
scratch as core React + TypeScript developer
• Owned end-to-end frontend delivery across all platforms — from architecture
through QA and release
• Implemented real-time data processing pipelines for live price feeds, order
execution, and TradingView chart integration
• Delivered performance optimization across the full frontend stack — reduced app
response time by 73% and improved user conversion to rst target action by 27%
• Adopted AI-assisted development work ows using Cursor, Claude, and Codex with
MCP integrations — increased team delivery speed by 84%
• Mentored developers, conducted PR reviews, and de ned frontend coding
standards — maintaining 95.8% rst-pass QA rate across average 21 tasks/sprint
• Collaborated with backend development (Node.js) by implementing API endpoints
and data handling logic to support frontend features
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BetSoftware · Senior React Developer · 2022 – 2023 · React, TypeScript, Jest
• Worked on high-load React platform serving 300k–500k MAU — focused on
performance optimization and scalable component architecture
• Implemented full UI redesign and UX improvements across core product ows
• Refactored legacy codebase and maintained unit test coverage with Jest

CloudDevs · Senior React Developer · 2021 – 2022 · React, Next, TypeScript
• Built DeFi applications and staking platforms with React + TypeScript and smart
contract integration
• Acted as frontend lead for a 3-person team — drove technical planning,
architecture decisions, and delivery coordination across DeFi applications and
crypto project websites
• Designed and developed websites for crypto projects (React, Next.js, Web3) —
implemented real-time data processing for on-chain events

geoCapture · Middle Full-stack Developer · 2020 – 2021 · React, Next, Laravel,
GraphQL
• Developed scalable logistics CRM portal (Laravel, React, Next.js) with real-time data
sync
• Built React Native mobile app with BLE device tracking and real-time backend
synchronization

Lifeisgoodlabs · Middle Full-stack Developer · 2018 – 2020
• Developed web applications using Laravel and WordPress; built mobile apps with
Ionic (Angular)
• Participated in hiring, mentoring, and performance optimization of legacy
JavaScript projects
• Managed direct client communication across requirements, scoping, and delivery

Upwork · Full-stack Freelancer · 2017 – 2018
• Delivered client projects using WordPress, Laravel, and Ionic; worked directly on
requirements and delivery

SITIO · Junior Full-stack Developer · 2016 – 2017
• Developed WordPress sites

EDUCATION
Master's – Arti cial Intelligence 2016 – 2018
Kharkiv National University of Radioelectronics

Bachelor's – Computer Science 2012 – 2016
Kharkiv National University of Radioelectronics
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