Work at Borderless

Senior Blockchain Developer

At Borderless Software, we believe that people drive everything we do. That’s why we build a work experience designed to help you grow, enjoy what you do, and develop professionally, without borders.

We are looking for a Senior Blockchain Developer with experience who can create engaging, high-impact digital experiences. Would you like to join our team? 


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.
Web3 & Integrations 
  • 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.
Architecture & Security 
  • 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. 

 

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