Solidity Developer

Web3 Entrepreneur | Cto At Cowchain | Blockchain, De Fi, X2 Earn, Nft

Cowchain is a full-stack Web3 development company with 50+ developers, designers, and blockchain experts across Europe.
120+ projects delivered – from MVPs to ecosystems with millions of users. We’ve helped clients manage $180M+ in total market cap and $20M+ in daily trading volume.

Key Achievements:
▫️RetroBridge – cross-chain bridge with 30+ integrations
▫️AGNT Hub – AI-powered Web3 execution layer inside X (Twitter)
▫️StepApp – Move2Earn ecosystem with 9M+ users
▫️Pixelverse – Telegram-based gaming ecosystem with 45M+ users
▫️GBC DAO (GMX) – largest GMX-focused DAO
▫️TENET – Layer 1 blockchain built on Cosmos SDK
▫️Hybrid – Ethereum-based Layer 2 with AI agents
▫️Raiser – premium launchpad platform
▫️BRC20.com – first launchpad for Ordinals
▫️Launchpads raising tens of millions in days
▫️L2 testnets with hundreds of millions of transactions
▫️Telegram bots & mini-apps with 1M+ MAU
▫️Crypto banking projects with no-KYC cards and fiat rails

Services We Offer:
🛠 Development – Full-cycle blockchain dev: smart contracts, front/back-end, integrations
⚙️ DevOps – Post-launch support, scaling, optimization
🛠 Ready-made solutions – Pre-built modules for faster deployment
🔐 Security – Smart contract audits, secure architecture
🎨 Design – UI/UX tailored for Web3
🧩 Consulting – Tokenomics, product strategy, project direction, web3 marketing
🤖 Web3 projects with integrated AI solutions
💳 Neobank solutions – apps with no-KYC crypto cards and fiat rails

Tech Stack:
🖥 Front-end: React.js, Next.js, JavaScript, Tailwind CSS
🔧 Back-end: Node.js, Express, Nest.js, Microservices
🗄 Databases: MongoDB, MySQL, PostgreSQL
💎 Blockchain: Ethereum, Polygon, Avalanche, Solana, BSC, Bitcoin, TON, Near
☁️ Cloud: AWS, Azure, Google Cloud
⚙️ Infra: Docker, Kubernetes, TheGraph (Subgraphs), event indexing

Cowchain – let’s make web3 tech work for you. 


Experience: 9 years

Yearly salary: $104,000

Hourly rate: $45

Nationality: 🇺🇦 Ukraine

Residency: 🇺🇦 Ukraine


Experience

Development Lead
Retro Bridge
2023 - 2024
Designed and implemented the initial protocol architecture, built the main cross-chain bridge engine with support for more than 20 blockchain networks, organised CI/CD and automated deployment.
Front-end Web3 Team Lead
Full stack, Web3
2021 - 2022
Web Developer
QBerg
2020 - 2021
Front-end Web3 Developer.
Front-end Developer
Highware company
2018 - 2020

Skills

backend
blockchain
blockchain-engineer
defi
ethereum
ethereumjs
front-end
nestjs
nextjs
nft
nuxtjs
solidity
web3
web3js
english
russian
ukrainian