Senior Software Engineer – Cryptography / Digital Asset Security

Eliassen Group; New York (NY); Hybrid; USD 123,000 - 129,000; Full time

Job summary

Eliassen Group seeks a Senior Software Engineer with cryptography and digital asset security to design secure backend systems supporting custody and wallet infrastructure. You will implement MPC protocols, manage cryptographic keys, and integrate blockchain nodes for cross-network transactions.

Ideal candidates have 5–10+ years in backend secure development, strong Rust/Go/C/C++, and experience with OpenSSL or MPC frameworks, SGX, and HSMs in demanding environments.

Qualifications

• 5–10+ years of software engineering experience in backend and secure systems development.
• Strong programming in Rust (preferred), Go, or C/C++.
• Hands-on cryptographic libraries such as OpenSSL or MPC-based frameworks.

Responsibilities

• Design and develop secure backend systems supporting digital asset custody and crypto wallet infrastructure.
• Implement advanced cryptographic protocols, including MPC frameworks and secure key management solutions.
• Integrate blockchain nodes and APIs to construct, sign, and broadcast transactions across networks (Bitcoin, Ethereum, Solana).
• Build and optimize systems leveraging trusted execution environments such as Intel SGX and secure enclaves.
• Collaborate with cross-functional teams to ensure system security, scalability, and resilience in highly sensitive environments.

Skills

Rust

Go

C/C++

Blockchain tech

OpenSSL

MPC frameworks

Intel SGX

HSMs

Ethereum RLP

Bitcoin UTXO

Education

Master’s or PhD in Computer Science, Cryptography, Mathematics, or related field

Tools

Intel SGX

MPC libraries

OpenSSL library

Job description

Senior Software Engineer – Cryptography / Digital Asset Security

Our client, a leader in the financial services industry, has an excellent opportunity for a Senior Software Engineer with cryptography and Digital Asset Security expertise to work on a 12+ month contract-to-hire role in New York, NY. This position is 4 days a week onsite and 1 day a week remote.

Due to client requirements, applicants must be willing and able to work on a w2 basis. For our w2 consultants, we offer a great benefits package that includes Medical, Dental, and Vision benefits, 401k with company matching, and life insurance.

Rate: $89 - $94/hr w-2

Responsibilities:

• Design and develop secure backend systems supporting digital asset custody and crypto wallet infrastructure
• Implement advanced cryptographic protocols, including MPC frameworks and secure key management solutions
• Integrate blockchain nodes and APIs to construct, sign, and broadcast transactions across networks (Bitcoin, Ethereum, Solana)
• Build and optimize systems leveraging trusted execution environments such as Intel SGX and secure enclaves
• Collaborate with cross-functional teams to ensure system security, scalability, and resilience in highly sensitive environments

Requirements:

• 5–10+ years of software engineering experience with a focus on backend and secure systems development
• Strong programming expertise in Rust (preferred), Go, or C/C++
• Hands-on experience with cryptographic libraries such as OpenSSL or MPC-based frameworks
• Experience with trusted execution environments (Intel SGX) and hardware security modules (HSMs)
• Strong understanding of blockchain technologies, transaction structures (Bitcoin UTXO, Ethereum RLP), and wallet systems

Preferred Skills:

• Master’s or PhD in Computer Science, Cryptography, Mathematics, or related field
• Experience with advanced cryptographic concepts such as MPC algorithms, homomorphic encryption, or oblivious transfer
• Familiarity with hierarchical deterministic (HD) wallet/address schemes and cold wallet architectures
• Experience in digital asset or blockchain-focused startup environments
• Knowledge of secure data transmission techniques such as QR-based systems

Job #: JN-072026-107749

Skills, experience, and other compensable factors will be considered when determining pay rate. The pay range provided in this posting reflects a W2 hourly rate; other employment options may be available that may result in pay outside of the provided range.

W2 employees of Eliassen Group who are regularly scheduled to work 30 or more hours per week are eligible for the following benefits: medical (choice of 3 plans), dental, vision, pre-tax accounts, other voluntary benefits including life and disability insurance, 401(k) with match, and sick time if required by law in the worked-in state/locality.

Please be advised- If anyone reaches out to you about an open position connected with Eliassen Group, please confirm that they have an Eliassen.com email address and never provide personal or financial information to anyone who is not clearly associated with Eliassen Group. If you have any indication of fraudulent activity, please contact [e-mail].