slimhmac
Senior Full Stack Engineer
Senior Frontend / Web3 Engineer | 9 years of experience in FinTech & Blockchain
Over 9 years in fintech and blockchain development, with 15+ projects released from scratch.
As a Team Lead, I made key architectural and stack decisions, collaborated with product managers on new features, optimized development processes, conducted interviews, and led a team of 2–3 developers.
As a Team Lead, I made key architectural and stack decisions, collaborated with product managers on new features, optimized development processes, conducted interviews, and led a team of 2–3 developers.
Core expertise:
- Web3 & blockchain integrations: wallet connect, on-chain payments, WaaS
- Frontend development: React / Next.js / Vue / TypeScript / state management
- Backend: enterprise Node.js with TypeScript, microservices
Highlights:
- Led the frontend launch for 0xpay.app, a crypto payment gateway processing $1B+ in volume
- Contributed to LocalTrade.cc crypto exchange
- Created and maintain @nfid/identitykit — open-source library used across the ICP ecosystem for wallet connections
- Participated in multiple ICP hackathons, helping shape ICRC wallet standards
Strengths: multitasking across several projects with a focus on outcomes, clean scalable architecture, and strong communication between product and tech.
Goal: to grow as a Web3 engineer and contribute to the next generation of decentralized products.
Experience: 9 years
Yearly salary: $140,000
Hourly rate: $70
Nationality: 🇺🇦 Ukraine
Residency: 🇻🇳 Vietnam
Experience
Lead Senior Frontend Web3 Engineer
Internet Identity Labs 2024 - 2025
Building software around the Internet Computer: • Designed, built and maintained IdentityKit — a modular open-source authentication toolkit for ICP-based dApps, powering multiple production integrations across the ecosystem. • Authored and maintained detailed developer documentation to improve onboarding and community adoption. • Performed code reviews, mentored junior engineers, and supported open-source contributors. • Managed 2–3 concurrent projects, ensuring architectural consistency, scalability, and timely delivery. • Contributed to frontend architecture and strategic solution design for developer-facing SDKs. • Implemented and optimized CI/CD pipelines (GitHub Actions, Docker) to streamline releases.
Senior Full-Stack Web3 Engineer
Curra.io 2023 - 2024
• MPC-based custody infrastructure for enterprise-grade digital asset storage. • Developed non-custodial SDKs and APIs to simplify crypto payments, wallet integrations and automated on-chain operations for B2B clients. • Frontend architecture using modern tools
Senior Full-Stack Engineer, Front-End Lead
0xpay 2021 - 2023
• Designed and maintained several npm packages within a monorepo setup (Lerna / pnpm / Yarn workspaces), ensuring modular scalability and efficient code sharing. • Conducted 30+ technical interviews, helping to build a strong and reliable engineering team. • Planned development tasks, performed code reviews and ensured high-quality releases across backend and frontend teams. • Led onboarding and mentorship programs for new developers, improving team productivity and culture. • Contributed to the design and optimization of high-load crypto-processing services, integrating secure payments and analytics modules.
Senior Full-Stack Engineer
LocalTrade 2021 - 2022
• Designed and implemented key modules of LocalTrade’s trading platform — order matching, order book, trade execution, and settlement. • Integrated fiat gateway / on-ramp / off-ramp flows to allow users to deposit and withdraw in local currencies. • Built and maintained internal API services for market data, account balances, transaction history, and KYC processing. • Assisted in security and compliance work — integrating KYC checks, anti-fraud logic, rate limiting, data validation. • Collaborated with frontend team: React / TypeScript dashboards, charts, real-time updates via websockets. • Optimized performance and scalability: caching, load balancing, database indices, horizontal scaling.
Full-Stack Developer
Atlas Development 2017 - 2021
• Built and maintained web applications for online payments, invoicing and user account management. • Developed frontend interfaces with React and TypeScript, improving usability and onboarding flow. • Created and integrated RESTful APIs for payment gateways, transaction logs and client analytics. • Participated in code reviews, refactoring legacy code, and adopting best practices for component design. • Collaborated with design and product teams to align UI with fintech compliance and usability standards
Skills
backend
ethereum
full-stack
react
front-end
english
russian
ukrainian