Senior Full Stack Engineer with 6+ years of experience building scalable web applications across healthcare, eCommerce, marketplaces, recruitment platforms, media, cryptocurrency, Web3, and NFT products.
Throughout my career, I have worked on both frontend and backend development, delivering complete product features from UI implementation to API design, database architecture, third-party integrations, testing, and deployment.
I have experience working in distributed teams of various sizes, from startups to large-scale organizations, contributing to customer-facing products used by thousands of users.
My technical expertise includes React, Next.js, Node.js, TypeScript, Express.js, NestJS, PostgreSQL, MySQL, MongoDB, GraphQL, Docker, AWS, CI/CD, and modern testing frameworks.
I enjoy building reliable, maintainable, and user-focused applications while collaborating closely with product, design, and engineering teams.
Open to remote Senior Full Stack Engineer opportunities.
Experience: 6 years
Yearly salary: $80,000
Hourly rate: $40
Nationality: 🇺🇦 Ukraine
Residency: 🇵🇱 Poland
Experience
Fullstack developer
Five systems 2024 - 2026
- Designed and implemented API endpoints for payment sessions, wallet-related operations,transaction status handling, and checkout data management. Worked on PostgreSQL schemas for storing users, wallets, payments, transactions, payment statuses, and operational records. - Developed frontend screens using Next.js for checkout flows, wallet-connected states, payment progress, transaction confirmation, success and failure states, and user-facing error handling. Used viem and wagmi to integrate wallet connection, network validation, transaction interactions, and reactive Web3 UI behavior. Tech stack:Next.js, React.js, TypeScript, CSS3, SASS, Nest.js, REST API, PostgreSQL, Zustand, viem, wagmi,wallet integrations, Web3-related integrations.
Frontend developer
Maven 2022 - 2024
- Contributed to the development of React-based interfaces for campaign pages, user dashboards, KYC flows, staking sections, and token sale participation screens. Worked with API driven data, Web3-related user states, wallet-connected flows, transaction progress, and eligibility logic based on KYC, whitelist, and tier status. - Helped integrate Payload CMS to make launch pages configurable for different token campaigns, including project content, visuals, sale details, and interface sections. Participated in frontend bug fixing, UI improvements, production issue investigation, and user support during active launch campaigns. Tech stack: React.js, TypeScript, JavaScript, HTML5, CSS3, SASS, Tailwind CSS, React Router,React Query, Zustand, Web3-related integrations, Payload CMS, Blockpass API, SendGrid API,Google Cloud services, Sentry.
Frontend developer
Trembit 2000 - 2022
- Contributed to the development of React-based frontend pages for NFT dashboards, liquidity charts, staking pool sections, user-owned NFT management, and custom NFT creation flows. - Worked with MetaMask-connected user states, Web3-related UI behavior, KYC-based access restrictions, form validation, loading states, and responsive layouts. Created landing pages for launch campaigns, adapting visual sections and content blocks to marketing and product requirements. Used Redux Toolkit to manage shared application state,user-facing data, Web3-related states, and UI behavior across the platform. Tech stack: React.js, Typescript, Redux Toolkit, MetaMask, CSS, SASS, Web3-related integrations
Skills
mongo
nestjs
nextjs
node
postgres
react
sql
web3js
full-stack
english
russian
ukrainian