Backend Developer (Node.js, Web3 / Solana)
About Cowchain
Cowchain is a Web3 development company behind PixelVerse, StepApp, RetroBridge, Hybrid, Tenet, and 150+ other blockchain products with $180M+ combined market cap. We're a team mostly based in Ukraine, with some across Europe, fully remote. We build across DeFi, GameFi, cross-chain bridges, AI agents, NFT platforms, and Telegram mini-apps.
We look for people who take ownership, think deeply, and can work independently, ask the right questions, and move through uncertainty without waiting for step-by-step instructions. No unnecessary hierarchy—you talk directly to the founders when it matters. We value what you bring over how long you've been around.
About the role
We're looking for a Backend Developer with strong Node.js experience to build and ship blockchain products, mainly in the Solana ecosystem, with occasional EVM-related tasks. You'll work on real client products: payment flows, swaps, cross-chain bridges, token mechanics, and transaction logic.
We care less about how many years you've logged and more about how you think: how you break down a problem, gather requirements before building, weigh trade-offs, and reason about architecture.
What you'll do
- Build new features and services from scratch, and support existing ones
- Build, sign, and send transfer and swap transactions
- Work with Solana mechanics: token accounts, priority fees, multi-signature transactions, transaction building
- Integrate with Solana/DeFi protocols such as Pump.fun, Jupiter, Raydium, Meteora, and similar platforms
- Take part in architecture discussions—your input on design decisions matters
- Debug, fix, and harden production solutions
What we're looking for
- 3+ years of commercial backend experience
- Strong Node.js experience
- Solid understanding of blockchain mechanics: gas, priority fees, token account creation, multi-signatures
- Hands-on experience with Solana tooling: Solscan, Solana Explorer, transaction analysis and transaction building
- Experience building, signing, and sending transfer and swap transactions
- Comfortable with Bignumber.js / bn.js for safe big-number math
- Experience with Solana/DeFi protocols such as Pump.fun, Jupiter, Raydium, Meteora, or similar
- Familiarity with Jira, Git, and GitFlow
Nice to have
- Experience with EVM-based chains: Ethereum, Polygon, BSC, Arbitrum, Base, Avalanche, etc.
- Experience with cross-chain bridges: lock/mint and liquidity models
- Experience with token launch mechanics or meme-coin creation
- Outsource/agency background
What we offer
- Fully remote work from anywhere
- Competitive salary with activity bonuses
- Paid vacation and sick leave
- AI tool subscriptions: ChatGPT, Claude, Gemini
- Internal knowledge sharing and Personal Development Plans
- Individual onboarding tailored to your role and project
- Direct access to founders and C-level — decisions happen fast, no unnecessary bureaucracy