Sr. Engineer, Cryptography Engineering

Eliassen Group; Montpelier (VT); Remote; USD 117,000 - 129,000; Full time

Job summary

Our client, Eliassen Group, is seeking a Sr. Engineer in cryptography to design secure software components for a crypto custody wallet using MPC. The role emphasizes threat modeling, secure coding, and integration with cryptographic libraries and hardware security features.

Remote contract position offering competitive W2 hourly rates; experience with Rust, Go, C/C++, and OpenSSL is essential for building scalable and secure tokenized assets infrastructure.

Qualifications

• Expertise in secure software development and cryptography engineering.
• Proficiency in Rust, Go, or C/C++ and secure coding against attacks.
• Hands-on experience with cryptographic protocols and key exchange.
• Familiarity with OpenSSL and hardware security features like SGX/HSMs.

Responsibilities

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

Skills

Rust

Go

C/C++

Secure coding

OpenSSL

MPC libraries

Intel SGX

HSMs

Blockchain

Education

Bachelor's degree

Job description

Sr. Engineer, Cryptography Engineering

Anywhere

Type: Contract

Category: Development

Industry: Financial Services

Workplace Type: Remote

Standard Hours: Open

Reference ID: JN -092026-108761

Date Posted: 09/23/2026

Shortcut: http://careers.eliassen.com/zWmywO

Description

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 -092026-108761

Responsibilities

• 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.

Experience Requirements

• 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.

Education Requirements

Bachelor's degree.

Recruitment Transparency Notice

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 ([e-mail], 781-808-2924) 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, 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.

If anyone reaches out to you about an open position connected with Eliassen Group, please ensure that you are working directly with us by confirming the following: When you work with Eliassen Group, all email communication will come from an Eliassen.com address, never Gmail, Yahoo, etc. Eliassen Group will never ask you for personal information (home address, bank account, or check routing number) until you have worked with someone clearly associated with Eliassen Group. If you have any indication of fraudulent activity, please contact [e-mail].

About Eliassen Group: Eliassen Group is a strategic consulting firm that helps organizations reach further and achieve more through our technology, business advisory, and life sciences solutions. For nearly 40 years, we have combined exceptional people, deep domain expertise, and intelligent capabilities to expand our clients’ capacity and accelerate meaningful outcomes. We are driven by a purpose to positively impact the lives of our employees, clients, consultants, and the communities we serve.

Eliassen is committed to building a diverse and inclusive team from a variety of backgrounds, perspectives, and skills. We are an Equal Opportunity and affirmative action employer and all employment decisions are based on merit, performance, and business needs. Eliassen does not discriminate on the basis of race, color, gender identity or expression, sexual preference or orientation, sex (including pregnancy, childbirth, and related medical conditions), marital status, creed, religion, physical or mental disability, genetic information, military or veteran status, age, ancestry, national origin, citizenship status, prohibited criminal record inquiries of applicants and employees, or any other category protected by federal, state, or local laws.

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