Sr. Engineer, Cryptography Engineering

Type:
Contract

Category:
Development

Industry: Financial Services

Workplace Type:
Remote

Standard

Hours:

Open

Reference  -

Date Posted: 09/23/2026

Shortcut:

Remote

Our client is building secure and scalable infrastructure for institutional digital finance. The team focuses on security engineering, cryptography, blockchain, and research-backed engineering that bridges theory and practice. You will help build a secure and resilient crypto and tokenized assets custody solution leveraging MPC, secure enclaves, and robust backend services.

We can facilitate w2 and corp-to-corp consultants. 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: $85.00 to $94.00/hr. w2

JN -

• Design and implement secure software components for a crypto custody wallet based on MPC.
• Apply threat modeling to anticipate and mitigate attack vectors including side-channel and MITM during MPC rounds.
• Implement and review cryptographic code in Rust, Go, or C/C++ with secure coding practices.
• Audit and integrate cryptographic libraries such as OpenSSL and MPC-specific frameworks.
• Leverage hardware security features including Intel SGX and HSMs, including remote attestation.
• Integrate with blockchain nodes and APIs to assemble and broadcast transactions across networks.
• Parse and construct blockchain transactions, including Bitcoin UTXOs and Ethereum RLP.
• Design secure storage for encrypted key shares and audit logs, and implement robust database practices.
• Build reliable networking, RPC, and concurrency controls for orchestrating multi-party signing.
• Contribute to cloud security and containerized deployments to avoid misconfigurations.

• Expertise in secure software development and cryptography engineering.
• Proficiency in Rust, Go, or C/C++ and secure coding against known classes of attacks.
• Hands-on experience with cryptographic protocols, key exchange, or signature schemes.
• Familiarity with pitfalls such as entropy quality and information leakage via error handling.
• Experience with OpenSSL or MPC libraries and hardware security features such as Intel SGX and HSMs.
• Background integrating blockchain nodes and APIs with the ability to parse and create transactions.
• Knowledge of secure storage patterns and database security.
• Understanding of cloud security and containerization for deployment.
• Experience with Trusted Execution Environments such as Intel SGX, including remote attestation.

Bachelor's degree.

Eliassen Group values transparency in our recruitment practices. Please be advised that Eliassen Group utilizes artificial intelligence (AI) tools as part of its initial application screening and hiring process. You may receive email and SMS notifications from the Eliassen Virtual Recruiting Team (, ) inviting you to complete a brief voice screening as part of your application process. These tools assist our hiring teams in different ways, including but not limited to, assistance in reviewing application materials to help identify candidates whose qualifications most closely match the requirements of the position.

All AI-assisted evaluations and responses are reviewed by human recruiters before any hiring decisions are made. The use of AI in our process is intended to support fairness, efficiency, and consistency, and Eliassen Group takes measures to prevent bias or discrimination in connection with its hiring practices. By proceeding, you acknowledge, agree, and consent to Eliassen Group’s use of these tools, including AI tools, as part of the application and hiring process.

Skills, experience,…