Back-End Block Chain Developer IV

Job#: 3041374

Job Description

Senior Block Chain Engineer

We’re building the secure, scalable infrastructure that powers the future of institutional digital finance — and we’re looking for motivated members to join us.

• Security engineering
• Cryptography and secure protocol design
• Blockchain programming and distributed systems
• Research-backed engineering that bridges theory and practice

If you’re excited about programming with Block Chain, security, cryptography, and the future of digital assets, we’d love to connect.

• Security Engineers: Should have expertise in secure software development and cryptography engineering. This role will be responsible to work with cryptographers to build a high secured and resilient crypto and tokenized assets custody solution.
• This role will involved hands on programming in your day to day and a star candidate should be proficient in secure coding practices, especially in C/C++, Go, or Rust, to implement cryptographic code that is resistant to known security attacks (e.g. side-channel attacks). They should also know how to use or audit cryptographic libraries (OpenSSL, or MPC-specific libraries) and be familiar with hardware security features (like Intel SGX and HSMs). They must be comfortable working with MPC or cryptographic frameworks typically used to build crypto custody solution.
• They will perform code reviews focusing on crypto security and design tests for potential vulnerabilities. Experience with cryptographic protocols (e.g., having implemented or audited a key exchange or signature scheme) and knowledge of common pitfalls (like poor random number generation or improper error handling leaking information) are essential.
• They should have experience integrating with blockchain nodes/APIs is important since the wallet backend will need to assemble and broadcast transactions on multiple networks. They should understand blockchain transaction formats (Bitcoin UTXOs, Ethereum RLP, etc.) and be able to parse and create transactions for signing.
• Knowledge of secure storage and databases is also needed – for instance, how to securely store an encrypted key share or audit log on the server side. The solution will orchestrate communication between signing parties, developers should be skilled in networking (sockets, RPC frameworks) and concurrency control. Familiarity with cloud security (to avoid misconfigurations) and containerization can be beneficial for deployment.

Experience working with Trusted execution environment like Intel SGX including remote attestation.

Core Skillsets & Experience:

• Should have expertise in secure software development and cryptography engineering.
• Proficient in secure coding practices, especially in C/C++, Go, or Rust
• Should know how to use or audit cryptographic libraries (OpenSSL, or MPC-specific libraries) and be familiar with hardware security features (like Intel SGX and HSMs).
• Must be comfortable working with MPC or cryptographic frameworks typically used to build crypto custody solution.
• Strong threat modeling skills are required to anticipate and mitigate potential attack vectors (such as man-in-the-middle during the MPC rounds, malicious client apps, etc.).
• Experience with cryptographic protocols (e.g., having implemented or audited a key exchange or signature scheme) and knowledge of common pitfalls (like poor random number generation or improper error handling leaking information) are essential.
• Should have experience integrating with blockchain nodes/APIs
• Understanding of blockchain transaction formats (Bitcoin UTXOs, Ethereum RLP, etc.) and be able to parse and create transactions for signing.
• Knowledge of secure storage and databases is needed.
• Familiarity with cloud security (to avoid misconfigurations) and containerization can be beneficial for deployment.

Experience working with Trusted execution environment like Intel SGX including remote attestation.

Core Technologies:

• C/C++, Go, or Rust
• OpenSSL or MPC-specific libraries
• Intel SGX and HSMs
• MPC or cryptographic frameworks
• Blockchain nodes/APIs
• Bitcoin UTXOs, Ethereum RLP, etc.
• Secure storage and databases

Cloud security and containerization

Everforth Apex is a world-class IT services company that serves thousands of clients across the globe. When you join Everforth Apex, you become part of a team that values innovation, collaboration, and continuous learning. We offer quality career resources, training, certifications, development opportunities, and a comprehensive benefits package. Our commitment to excellence is reflected in many awards, including ClearlyRateds Best of Staffing® in Talent Satisfaction in the United States and Great Place to Work® in the United Kingdom and Mexico.

Everforth Apex uses a virtual recruiter as part of the application process. Click here for more details. By applying for this job, you agree to receive calls, AI-generated calls, text messages, or emails from Everforth Apex and its affiliates, and contracted partners. Frequency varies for text messages. Message and data rates may apply. Carriers are not liable for delayed or undelivered messages. You can reply STOP to cancel and HELP for help. You can access our privacy policy at https://www.apexsystems.com/privacy-policy

Everforth Apex Benefits Overview: Everforth Apex offers a range of supplemental benefits, including medical, dental, vision, life, disability, and other insurance plans that offer an optional layer of financial protection. We offer an ESPP (employee stock purchase program) and a 401K program which allows you to contribute typically within 30 days of starting, with a company match after 12 months of tenure. Everforth Apex also offers a HSA (Health Savings Account on the HDHP plan), a SupportLinc Employee Assistance Program (EAP) with up to 8 free counseling sessions, a corporate discount savings program and other discounts. In terms of professional development, Everforth Apex hosts an on-demand training program, provides access to certification prep and a library of technical and leadership courses/books/seminars once you have 6+ months of tenure, and certification discounts and other perks to associations that include CompTIA and IIBA. Everforth Apex has a dedicated customer service team for our Consultants that can address questions around benefits and other resources, as well as a certified Career Coach. You can access a full list of our benefits, programs, support teams and resources within our ‘Welcome Packet’ as well, which an Everforth Apex team member can provide.

Everforth Apex Systems is an equal opportunity employer. We do not discriminate or allow discrimination on the basis of race, color, religion, creed, sex (including pregnancy, childbirth, breastfeeding, or related medical conditions), age, sexual orientation, gender identity, national origin, ancestry, citizenship, genetic information, registered domestic partner status, marital status, disability, status as a crime victim, protected veteran status, political affiliation, union membership, or any other characteristic protected by law. Everforth Apex will consider qualified applicants with criminal histories in a manner consistent with the requirements of applicable law.

If you require an accommodation under the Americans with Disabilities Act to participate in an interview with a virtual recruiter or to use our website for a search or application, please contact our Benefits Department at [email protected] or 804-523-8228. Please note that this contact information is strictly to be used for medical ADA accommodations and that no other inquiries will be answered.

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Everforth Apex Systems is part of the Commercial Segment of Everforth, Inc.

NYSE: EFOR

4400 Cox Road

Suite 200

Glen Allen, Virginia 23060

Everforth Apex is an equal opportunity employer. We do not discriminate or allow discrimination on the basis of race, color, religion, creed, sex (including pregnancy, childbirth, breastfeeding, or related medical conditions), age, sexual orientation, gender identity, national origin, ancestry, citizenship, genetic information, registered domestic partner status, marital status, disability, status as a crime victim, protected veteran status, political affiliation, union membership, or any other characteristic protected by law. Everforth Apex will consider qualified applicants with criminal histories in a manner consistent with the requirements of applicable law. If you have visited our website in search of information on employment opportunities or to apply for a position, and you require an accommodation in using our website for a search or application, please contact our Benefits Department at [email protected] or 804-523-8228. (Do not submit resumes or solicit consultants to this email address). UnitedHealthcare creates and publishes the Transparency in Coverage Machine-Readable Files on behalf of Everforth Apex.