Blockchain Developer

About This Role

This implementation-focused role emphasizes secure software development, applied cryptography, trusted execution environments, remote attestation, and distributed blockchain systems. The work will focus on production engineering, bridging security concepts with practical implementation, with a strong emphasis on Go. The client seeks experienced, hands-on Security Engineers to implement secure, scalable infrastructure for institutional digital finance.

Responsibilities

• Design and build highly secure, resilient infrastructure supporting cryptocurrency and tokenized asset custody solutions
• Partner with cryptographers and security specialists to implement cryptographic protocols and security designs in production systems
• Develop secure, production-grade software with a strong emphasis on Go (Golang)
• Work with Trusted Execution Environments such as AWS Nitro Enclaves or Intel SGX, including implementation of remote attestation
• Implement and integrate cryptographic libraries and frameworks, including OpenSSL and MPC-related technologies
• Work with hardware-backed security technologies such as TEEs and Hardware Security Modules (HSMs)
• Participate in threat modeling to identify and mitigate attack vectors, including risks associated with MPC communication, malicious clients, compromised infrastructure, and network-based attacks
• Conduct security-focused code reviews and design tests to identify vulnerabilities and weaknesses in security-sensitive software
• Apply cryptographic protocols such as key exchange and digital signature schemes within production applications
• Integrate with blockchain nodes and APIs to support transaction construction, signing, and broadcasting across multiple networks
• Work with blockchain transaction formats, including Bitcoin UTXOs and Ethereum transaction encoding and formats
• Design secure mechanisms for storing sensitive information such as encrypted key shares, credentials, and audit logs
• Build secure communication between distributed signing parties using networking, RPC frameworks, and concurrency
• Apply cloud security and container security practices when deploying security-sensitive workloads

Requirements

• Strong background in hands-on security engineering and secure software development
• Strong proficiency with Go (Golang) and experience building production-grade systems in Go
• Hands-on experience with Trusted Execution Environments (TEEs), particularly AWS Nitro Enclaves and/or Intel SGX
• Practical experience implementing or working with remote attestation
• Experience implementing applied cryptography or integrating cryptographic functionality into production applications
• Experience using or auditing cryptographic libraries such as OpenSSL or MPC-specific libraries