Senior Blockchain Developer

Work Modality 

• 100% Remote 

• Full-time 

Language 

• English: B2 level or higher 

Responsabilities 

Blockchain Development 

• Design, develop, and audit secure and efficient smart contracts. 

• Implement solutions on public and/or private blockchain networks. 

• Define security, testing, and contract deployment standards. 

• Optimize execution costs (gas) and on-chain performance. 

• Actively participate in technical decisions and blockchain architecture definition.

• Design and integrate decentralized applications (dApps). 

• Integrate smart contracts with backend and frontend services. 

• Work with wallets, cryptographic signatures, and key management. 

• Design APIs and services that interact with the blockchain. 

• Implement oracle mechanisms and off-chain data consumption.

• Design hybrid on-chain/off-chain architectures. 

• Implement secure smart contract patterns (upgradeability, access control). 

• Prevent common vulnerabilities (reentrancy, overflow, frontrunning). 

• Define scalability strategies (Layer 2, sidechains, batching). 

What We Expect from You 

• 4–5+ years of experience in software development. 

• 2–3+ years of hands-on experience in blockchain development. 

• Proficiency in at least one of the following languages: Solidity, Rust, Go, TypeScript, or JavaScript. 

• Proven experience developing production-grade smart contracts. 

• Deep knowledge of: EVM and/or alternative blockchains (Solana, Polkadot, Cosmos), applied basic cryptography, transactions, gas, consensus, and validation mechanisms. 

• Experience with frameworks such as Hardhat, Foundry, or Truffle. 

• Experience integrating blockchain with traditional systems (APIs, databases). 

Nice to Have 

• Experience with DeFi, NFTs, DAOs, or Web3 protocols. 

• Knowledge of Layer 2 solutions (Optimism, Arbitrum, zk-rollups). 

• Experience conducting smart contract audits. 

• Knowledge of Cloud platforms (AWS, GCP, Azure). 

• Experience with event-driven architectures and microservices. 

• Deep understanding of SOLID principles, DDD, and Clean Architecture. 

• Participation in open-source projects or Web3 communities. 

Ready to join our team? Apply now by completing the form — we’d love to meet you.