Senior Blockchain Engineer

Job Description:

We are hiring a Senior Engineer, Blockchain Platforms to help build and integrate the blockchain infrastructure layer that underpins Client s digital asset custody and tokenization platforms.

This is a handson engineering role focused on Layer1 blockchain integration, core blockchain infrastructure components, wallet engineering, and custodyrelated blockchain workflows. The role works in close partnership with Crypto Custody Lead Engineers and Crypto Security Engineers to ensure blockchain interactions are secure, reliable, observable, and productionready. This engineer operates at the intersection of blockchain protocol mechanics and institutional custody systems.

What This Engineer Will Do:

Layer1 Blockchain Integration & Platforms:

• Integrate Client systems with existing Layer1 blockchains (e.g., Ethereumbased or other enterpriserelevant L1s).
• Evaluate and, where appropriate, contribute to building or extending Layer1 capabilities to meet custody, scalability, or resiliency needs.
• Understand chainlevel mechanics such as transaction lifecycle, finality, forks, reorgs, and event propagation.
• Ensure blockchain integrations are reliable under stress conditions and production loads.

Blockchain Infrastructure Components:

• Design and build core blockchain infrastructure services, including:
• Indexers and event processors
• Block explorers and observability tooling
• Chain data services and APIs
• Interoperability and crosschain integration components
• Ensure blockchain data pipelines are accurate, performant, and auditable.
• Support operational tooling required for troubleshooting, monitoring, and incident response.

Wallet Architecture & Development:

• Contribute to wallet architecture and development, including:
• Blockchainfacing wallet services
• Transaction creation, signing workflows, and submission pipelines
• Integration with custody key management systems (MPC, HSMs, signing services)
• Ensure wallet implementations cleanly separate protocol logic, security controls, and business rules.
• Partner closely with custody and security engineers to validate endtoend transaction flows.

CustodyRelated Blockchain Workflows:

• Share responsibility for custodyrelated blockchain workflows, including:
• Onchain transaction execution
• Event monitoring and reconciliation
• Chainspecific failure handling and recovery patterns
• Help define safe patterns for interacting with smart contracts and token standards from custody platforms.
• Ensure blockchain workflows align with custody policies, approvals, and risk controls.

Engineering Rigor & AIAugmented Development:

• Apply modern engineering practices to build reliable, testable, and observable blockchain services.
• Leverage GenAI and agentic AI tools to accelerate:
• Protocol analysis
• Code development and testing
• Documentation and knowledge sharing
• Maintain engineering rigor speed without sacrificing correctness or safety.

What you have:

Required Qualifications:

• 7 years of professional software engineering experience.
• Handson experience building or integrating blockchain or distributed ledger systems.
• Strong understanding of Layer1 blockchain protocols and transaction lifecycles.
• Experience building backend services, APIs, and infrastructure components.
• Proficiency in one or more languages such as Go, Java, Rust, Python, or similar.
• Ability to work effectively across custody, security, and platform teams.

Strongly Preferred:

• Experience with blockchain indexers, explorers, or chain analytics systems.
• Familiarity with wallet architecture and blockchain signing workflows.
• Exposure to crypto custody platforms or securitysensitive financial systems.
• Strong debugging instincts in distributed, asynchronous environments.
• Experience using AI tooling to support complex software development.

What Success Looks Like:

• Blockchain integrations are predictable, observable, and resilient.
• Wallet and transaction pipelines behave correctly across normal and edgecase chain conditions.
• Custody systems interact with blockchains safely and consistently.
• Incidents related to blockchain dependencies are well understood and quickly diagnosed.
• This role establishes strong foundations for scalable digitalasset custody and tokenization platforms.

Salary : $70 - $80