Senior Blockchain Platforms Engineer

The Judge Group

The Judge Group

Southlake, TX, USA

Posted on Jun 5, 2026
Our client is currently seeking a Senior Blockchain Platforms Engineer

Location: Southlake, TX or Austin, TX (On-site 4 days per week)

Job Type: Contract (12 Months) with potential for FTE conversion

About the Role

We are seeking a Senior Engineer, Blockchain Platforms to design, build, and integrate the blockchain infrastructure layer underpinning our digital asset custody and tokenization platforms.

This is a hands-on engineering role focused on Layer-1 blockchain integration, core infrastructure components, wallet engineering, and custody-related workflows. Working at the intersection of blockchain protocol mechanics and institutional-grade financial systems, you will partner closely with Crypto Custody Lead Engineers and Crypto Security Engineers to ensure all blockchain interactions are secure, reliable, observable, and production-ready.

Responsibilities

As a Senior Blockchain Platforms Engineer, you will focus on four core areas:

1. Layer-1 Blockchain Integration & Platforms

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

· Evaluate, build, or extend Layer-1 capabilities to meet enterprise custody, scalability, and resiliency needs.

· Manage chain-level mechanics including transaction lifecycles, finality, forks, reorgs, and event propagation.

· Ensure blockchain integrations remain highly reliable under stress conditions and production loads.

2. Blockchain Infrastructure Components

· Design and build core blockchain infrastructure services, including indexers, event processors, block explorers, observability tooling, chain data services, and APIs.

· Develop 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.

3. Wallet Architecture & Development

· Contribute to blockchain-facing wallet services, transaction creation, signing workflows, and submission pipelines.

· Integrate systems with custody key management frameworks, including MPC, HSMs, and signing services.

· Ensure wallet implementations cleanly separate protocol logic, security controls, and business rules.

· Partner with custody and security teams to validate end-to-end transaction flows.

4. Custody Workflows & Engineering Rigor

· Manage on-chain transaction execution, event monitoring, reconciliation, and chain-specific failure/recovery patterns.

· Define safe patterns for interacting with smart contracts and token standards from institutional custody platforms.

· Leverage GenAI and agentic AI tools to accelerate protocol analysis, code development, testing, and documentation without sacrificing correctness or safety.

Qualifications

Minimum Qualifications

· Experience: 7+ years of professional software engineering experience.

· Blockchain Domain: Hands-on experience building or integrating blockchain or distributed ledger systems, with a strong understanding of Layer-1 protocols and transaction lifecycles.

· Backend Systems: Proven experience building backend services, APIs, and robust infrastructure components.

· Programming Languages: Proficiency in one or more languages such as Go, Java, Rust, Python, or similar.

· Collaboration: Demonstrated ability to work effectively across cross-functional custody, security, and platform teams.

Preferred Qualifications

· Experience with blockchain indexers, explorers, or chain analytics systems.

· Familiarity with wallet architecture and blockchain signing workflows.

· Exposure to crypto custody platforms or security-sensitive financial systems.

· Strong debugging instincts in distributed, asynchronous environments.

· Experience utilizing AI tooling to support and accelerate complex software development.


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