Senior Blockchain Software Developer Jobs (NOW HIRING)

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 hands?on engineering role focused on Layer?1 blockchain integration, core blockchain infrastructure components, wallet engineering, and custody?related 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 production?ready. This engineer operates at the intersection of blockchain protocol mechanics and institutional custody systems.

What This Engineer Will Do

Layer?1 Blockchain Integration & Platforms

- Integrate Client systems with existing Layer?1 blockchains (e.g., Ethereum?based or other enterprise?relevant L1s).

- Evaluate and, where appropriate, contribute to building or extending Layer?1 capabilities to meet custody, scalability, or resiliency needs.

- Understand chain?level 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 cross?chain 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:

- Blockchain?facing 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 end?to?end transaction flows.

Custody?Related Blockchain Workflows

- Share responsibility for custody?related blockchain workflows, including:

- On?chain transaction execution

- Event monitoring and reconciliation

- Chain?specific 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 & AI?Augmented 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.

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Equal Opportunity Employer: Race, Color, Religion, Sex, Sexual Orientation, Gender Identity, National Origin, Age, Genetic Information, Disability, Protected Veteran Status, or any other legally protected group status.
At Randstad Digital, we welcome people of all abilities and want to ensure that our hiring and interview process meets the needs of all applicants. If you require a reasonable accommodation to make your application or interview experience a great one, please contact
Pay offered to a successful candidate will be based on several factors including the candidate's education, work experience, work location, specific job duties, certifications, etc. In addition, Randstad Digital offers a comprehensive benefits package, including: medical, prescription, dental, vision, AD&D, and life insurance offerings, short-term disability, and a 401K plan (all benefits are based on eligibility).
This posting is open for thirty (30) days.