Experienced technical leader with 12+ years in software development, architecture, and team management.
Specializing in backend development (TypeScript, NestJS), blockchain solutions (Web3, DeFi, EVM), and high-load distributed systems.

• 🏗️ Architect — Designing products from scratch
• 👨‍💻 Developer — Building scalable backend services
• 🧠 Tech Lead — Leading teams and conducting code reviews
• ⛓️ Blockchain Enthusiast — Integrating Web3 solutions into real-world products

TypeScript Node.js NestJS PostgreSQL TypeORM Redis RabbitMQ BullMQ REST WebSocket

Solidity Foundry Ethers.js VIEM Web3 DeFi EVM Substrate Move (Sui/Aptos) Solana TRON ERC-20 ERC-1155 ERC-4626

Next.js React Vue.js Wagmi Vite

Docker Kubernetes (K8s) Helm AWS CI/CD GitHub Actions GitLab CI Linux

Jan 2023 — Present | AI-driven prediction markets, Web3, DeSci

• Leading technical team and full development cycle of decentralized science market platform (AI + Web3)
• Designing blockchain architecture based on Humanode (Substrate) and EVM
• Developing and testing smart contracts (Solidity, Foundry) for betting, bonding curve, and tokens
• Building backend services (NestJS, PostgreSQL, Redis, BullMQ, RabbitMQ) and contract indexer
• Managing frontend development (Next.js, RainbowKit, React) and UI/UX design
• Creating on-chain bots for data updates and automated betting
• Implementing CI/CD, code review, modular architecture, and documentation

Jan 2023 — Jan 2025 | NFT marketplace, DeFi, TRON / EVM projects

• Designed and implemented NFT marketplace architecture with custodial payments
• Developed NestJS backend, implemented queues (BullMQ, RabbitMQ) and caching (Redis)
• Created and tested smart contracts (Solidity), conducted internal audits
• Led developer team, performed code reviews and process optimization
• Implemented DeFi project based on ERC-4626 and TRON integration

Aug 2021 — Dec 2022 | Ethereum & EVM networks (DeFi, MEV, Flashbots)

• Developed tools and services for Ethereum and EVM networks
• Created REST API / BFF services, integrations with DEX and Dune analytics
• Built bots for DEX trading, monitoring, and strategies

Dec 2019 — Aug 2021

• Built company IT architecture from scratch
• Managed developers, implemented DevOps and CI/CD
• Developed internal APIs and services

Nov 2018 — Dec 2019

• Designed microservices architecture and DevOps infrastructure
• Developed ERP system, implemented CI/CD and monitoring systems

Jan 2015 — Nov 2018

• Developed websites and internal systems
• Administered Linux servers, optimized databases and infrastructure

Far Eastern Federal University (FEFU)
Faculty of Radio Electronics and Computer Engineering
Specialty: Computing Machines, Complexes, Systems and Networks
Graduated 2009

• System architecture design
• Team management & mentoring
• Code review & optimization
• DevOps & CI/CD implementation
• Technical documentation

• Smart contract development & auditing
• DeFi protocols & integrations
• EVM & Substrate ecosystems
• MEV & Flashbots
• Web3 infrastructure

• 📧 Email: sergei.smart@gmail.com
• 💼 LinkedIn: linkedin.com/in/sshestak
• 💬 Telegram: @smartex