Contact information

You can get this candidate's contact information from https://www.work.ua/resumes/17995788/

Work experience

Senior Software Engineer, Frontend

from 05.2025 to now (1 year 5 months)
Trustyfy, Дистанційно (IT)

Fintech / payments product (crypto banking cards).
- Built the customer web app in React, Next.js and TypeScript: onboarding, card management, transaction history and live balances over REST and WebSocket APIs. Forms validated with Zod, errors tracked in Sentry.
- Built the internal backoffice: role-based access, compliance dashboards, transaction monitoring and multi-step approval flows.
- Designed the shared accessible design system and the modular frontend architecture used by both apps; run code reviews.

Full Stack Engineer (Contract)

from 12.2024 to 07.2025 (8 months)
ZeuZ, Дистанційно (IT)

Crypto trading platform.
- Sole developer: built the trading platform with multi-account support, cross and isolated margin trading, and account statistics.
- Integrated Web3 wallets (MetaMask, Trust Wallet) so users trade without traditional exchange onboarding.
- Designed the trading UX and tested it with users.

Software Engineer (Contract)

from 08.2024 to 04.2025 (9 months)
Harvey, Дистанційно (IT)

AI platform for the legal industry.
- Built UI for AI legal tools: document-analysis workflows and LLM chat interfaces over legal data.
- Worked with the AI and backend teams to bring LLM features into the product frontend.
- Contributed to the design system and component library.

Senior Frontend Developer (Contract)

from 07.2024 to 11.2024 (5 months)
Optimism Foundation, Дистанційно (IT)

Blockchain project under NDA: crypto wallet interfaces and DeFi.
- Implemented decentralized authentication, encryption and token integration together with the backend and security teams.
- Optimized UI components for speed and scale.

Frontend Team Lead / Full-Stack Web3 Developer

from 01.2023 to 07.2024 (1 year 7 months)
Prof-IT Blockchain, Дистанційно (IT)

- Led a team of 6 developers building a crypto wallet; Next.js performance work (code splitting, lazy loading, caching).
- Delivered Chrome extensions for blockchain integration.
- Set up the code-review process and weekly knowledge-sharing sessions.
- Sole developer on the Patex ecosystem: reusable components, Jest and Cypress tests, several feature launches.

Senior React Developer (Contract)

from 03.2022 to 01.2023 (11 months)
Coinbase, Дистанційно (IT)

- Added analytics and real-time data visualizations to internal tooling.
- Optimized Redux state management to cut load times.
- Built content-management tooling for the admin team.

Frontend Developer

from 02.2021 to 03.2022 (1 year 2 months)
Nimbus Platform, Дистанційно (IT)

- Worked on GraphQL data fetching in a Next.js codebase with teams in Europe and North America.
- Wrote unit tests, refactored components, improved documentation and onboarding.

Frontend Developer

from 01.2017 to 01.2021 (4 years)
INC4, Дистанційно (IT)

- Blockchain application development for Ambrosus, including ICO and platform launches.
- Modernized legacy React applications and built responsive landing pages.
- Mentored junior and mid-level developers through code reviews and knowledge-sharing sessions.

Education

National University of Life and Environmental Sciences of Ukraine

Master's degree, Computer Systems Analysis, Київ
Higher, from 2012 to 2018 (6 years)

Additional education and certificates

No additional education or certificates.

Knowledge and skills

• JavaScript
• React
• TypeScript
• Node.js
• Redux
• Next.js
• REST API
• Git
• React Query
• GraphQL
• WebSocket
• Tailwind CSS
• Ant design
• Material UI
• Ethers.js
• Jest
• Playwright
• CI/CD
• Blockchain

Language proficiencies

• English — advanced
• Ukrainian — fluent
• Italian — beginner

Additional information

I'm a senior frontend developer with 9+ years of commercial work. Most of it is React, Next.js and TypeScript; I also write Node.js on the backend.

Recent projects: a fintech customer app and its backoffice (onboarding, cards, transactions, approvals), Web3 wallet and trading interfaces (ethers.js, viem), and AI tools for lawyers with document analysis and LLM chat. I build shared component libraries, lead frontend work and do code reviews. Hands-on WebGL as well.

I live in Castel San Giovanni (Piacenza), Italy, and I'm looking for a remote full-time role in a product team. I work in English.

LinkedIn: [open contact info](look above in the "contact info" section)
GitHub: https://github.com/melnicenkovadik