Digital Solutions SME - Digital Asset Custody & Blockchain Security

We are seeking an experienced Digital Solutions Subject Matter Expert (SME) to lead the design, security, and strategic evolution of institutional-grade digital asset custody platforms. This role serves as the authoritative technical expert for custody architecture, cryptographic security, and blockchain integrations, ensuring systems meet the highest standards of security, resilience, and regulatory compliance. As a senior technical leader, you will shape custody strategy, set engineering standards, mentor teams, and collaborate with security, compliance, and leadership stakeholders. You will play a key role in safeguarding private keys, strengthening transaction controls, and ensuring the scalability and reliability of mission-critical digital asset infrastructure.

Responsibilities

Design and architect secure digital asset custody solutions, including hot, warm, and cold wallet environments

Build, manage, and govern Key Management Systems (KMS) leveraging MPC, multi-signature, and HSM technologies

Develop and maintain blockchain integrations for networks such as Bitcoin, Ethereum, and Layer 2 solutions

Own the end-to-end private key lifecycle, including secure generation, storage, rotation, backup, recovery, and decommissioning

Define and enforce secure transaction workflows, covering signing policies, approval hierarchies, thresholds, and monitoring

Act as the Subject Matter Expert (SME) for custody architecture, blockchain security, and applied cryptography

Lead security practices, including threat modeling, risk assessments, security audits, and incident response activities

Ensure compliance with regulatory and security frameworks such as FCA, SOC 2, ISO 27001, and FATF guidelines

Drive system reliability, scalability, and resilience, including blockchain node infrastructure, observability, and disaster recovery strategies

Establish and maintain standards, technical documentation, and best practices for custody and blockchain engineering

Mentor and guide engineering teams, influencing architectural decisions and long-term platform strategy

Do you have experience in Rust (programming language)?, Must have

Professional experience in software engineering, security engineering, or distributed systems

Deep, hands-on experience in digital asset custody, blockchain platforms, or cryptographic systems

Proven experience acting as a technical lead or SME for complex, security-sensitive platforms

Advanced knowledge of public-key cryptography, key lifecycle management, and secure signing mechanisms

Demonstrated experience with Ethereum, Bitcoin, and Layer 2 or emerging blockchain networks

Strong understanding of custody models, transaction mechanics, fee models, and blockchain consensus behaviors

Hands-on experience with MPC, multi-signature schemes, HSMs, and secure enclave technologies

Experience designing highly available, fault-tolerant systems in cloud or hybrid environments

Proficiency in one or more backend or systems languages (e.g., Go, Rust, Java, Python, or similar)

Strong understanding of security architecture principles and defense-in-depth strategies

Experience leading or supporting regulatory audits and certifications (SOC 2, ISO 27001, etc.)

Expertise in threat modeling, vulnerability management, monitoring, and incident response

Proven ability to mentor engineers and influence technical direction across teams

Comfortable engaging with security, compliance, legal, and executive stakeholders

Strong communication skills with the ability to translate complex technical concepts into business-relevant insights

Luxoft, a DXC Technology Company, (NYSE: DXC), is a digital strategy and software engineering firm providing bespoke technology solutions that drive business change for customers the world over. Luxoft uses technology to enable business transformation, enhance customer experiences, and boost operational efficiency through its strategy, consulting, and engineering services. Luxoft combines a unique blend of engineering excellence and deep industry expertise, specializing in automotive, financial services, travel and hospitality, healthcare, life sciences, media and telecommunications.