RedDuck

Blockchain | Smart Contracts, EVM, L2s, Rust, Solidity, Substrate, Cosmos

Overview

We’re a team of engineers, product architects, and builders helping Web3 teams launch faster and build smarter — from tokenomics to mainnet. No over-engineering. No buzzwords. No code we’d be ashamed to show. What We Deliver • Smart Contracts & Secure Infrastructure Modular, gas-optimized, and audit-ready contracts written in: Solidity, Vyper, Rust, Cairo, Move For: Ethereum, Arbitrum, Optimism, zkSync, Starknet, Base, Polygon, Avalanche, Solana, Sui, Aptos • Blockchain Architecture & Protocol Design We architect scalable systems using: Cosmos SDK, Substrate, Celestia, OP Stack, zkStack, Hyperledger Fabric Including: Tokenomics, staking, governance, permissioning, bridging. • Lean Web3 MVPs Fast launch, clean code. Tech stack includes: Foundry, Hardhat, Anchor, CosmWasm, zkSync SDK, Wagmi, Viem, Ethers.js, Next.js, TypeScript, GraphQL, IPFS, The Graph, MetaMask, Phantom, WalletConnect • Cross-Chain + L2s We support bridging and interoperability via LayerZero, Axelar, Wormhole, IBC, Nomad. We also design on modular & app-specific chains. • Consulting & Product Thinking We’re not just executors. We: → Ask the hard questions → Challenge assumptions → Propose smarter, sustainable paths How We Work • No over-engineering • No fake promises — just honest feedback • Speed + fundamentals • Outcomes > features • Principles > trends Who We Work With Startups, protocols, DAOs, and Web3 funds. From idea to MVP to post-audit optimization. Based in Europe, operating globally. We join early, go deep, and stay hands-on. Let’s build something real!

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Services

Blockchain, NFT & Cryptocurrency
Web Development

Skills

Blockchain Tokenization
Solana
Cryptocurrency
Ethereum
Blockchain
Blockchain, NFT & Cryptocurrency
DeFi
Solidity
Blockchain Platform
Blockchain Architecture
Crypto Wallet Development
Tokenomics
Web3
Smart Contract
Blockchain Development
100% Job Success

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Upwork activity

Hourly rate

$80.00

Minimum project size

$10K+

Total earned

$600K+

Total hours

7,292

Total jobs

54

Member since

May 27, 2020

Company information

Agency size

11-50 workers

Year founded

2020

Client focus

Large business

Medium business

Small business

Languages

English: Native or Bilingual
Russian: Native or Bilingual
Ukrainian: Native or Bilingual
German: Conversational

Awards

🥇 EthKyiv 2025 We secured the first place at the EthKyiv 2025 hackathon
🥈EthKyiv 2024 EthKyiv 2024 Hackathon – Secured second place, receiving the award from Vitalik Buterin.
🥇NEAR MetaBuild III NEAR MetaBuild III – Won a prize and received a grant to further develop the project on the NEAR blockchain.
🥈KyivTechSummit Kyiv Tech Summit – Took the second place in this prestigious Web3 hackathon where Vitalik Buterin was present.