Senior Blockchain Infrastructure Engineer (212631)

Aquent; Southlake (TX); On-site; USD 112,000 - 124,000; Full time

Job summary

Aquent is hiring a Senior Engineer, Blockchain Platforms, to shape the foundational infrastructure of our digital-asset ecosystem. You will work hands-on to design, build, and secure core blockchain services, including custody integrations and wallet workflows, on an onsite team in Southlake, TX.

You will collaborate across custody, security, and platform teams, ensuring scalable, observable, and resilient blockchain operations while leveraging AI tools to speed development and testing in a

Qualifications

• 7+ years of professional software engineering experience.
• Hands-on experience building or integrating blockchain or distributed ledger systems.
• Proficiency in Go, Java, Rust, Python, or similar.
• Ability to work effectively across custody, security, and platform teams.

Responsibilities

• Integrate institutional systems with existing Layer-1 blockchains, evaluating and extending capabilities to meet custody, scalability, and resiliency needs.
• Deeply understand chain-level mechanics such as transaction lifecycle, finality, forks, reorgs, and event propagation to ensure reliable integrations under stress and production loads.
• Design and build core blockchain infrastructure services, including indexers, event processors, block explorers, observability tooling, chain data services, APIs, and interoperability components.
• Ensure blockchain data pipelines are accurate, performant, and auditable, supporting operational tooling for troubleshooting, monitoring, and incident response.
• Contribute to wallet architecture and development, focusing on blockchain-facing wallet services, transaction creation, signing workflows, and submission pipelines.
• Integrate with custody key management systems (MPC, HSMs, signing services), ensuring clean separation of protocol logic, security controls, and business rules.
• Partner closely with custody and security engineers to validate end-to-end transaction flows and ensure wallet and transaction pipelines behave correctly across normal and edge-case chain conditions.
• Share responsibility for custody-related blockchain workflows, including on-chain transaction execution, event monitoring, reconciliation, and chain-specific failure handling and recovery patterns.
• Help define safe patterns for interacting with smart contracts and token standards from custody platforms, ensuring workflows align with custody policies, approvals, and risk controls.
• Apply modern engineering practices to build reliable, testable, and observable blockchain services, leveraging AI tools to accelerate protocol analysis, code development, testing, documentation, and knowledge sharing while maintaining engineering rigor.

Skills

Blockchain experience

Distributed systems

Backend APIs

Team collaboration

Go/Java/Rust/Python

Job description

Pay Comments: W2, Benefits and 401k matching

Minimum Pay (per hour): 81.00

Maximum Pay (per hour): 90.00

Hours: Full-time

Duration: 12 months

Job Description:

This role requires you to be onsite 4 days a week in Southlake, TX.

Join a pioneering financial institution at the forefront of digital asset innovation. We are building the future of finance, integrating cutting-edge blockchain technology to create secure, reliable, and scalable platforms for digital asset custody and tokenization. Our mission is to deliver robust and innovative solutions that empower our clients in the evolving digital economy.

We are seeking a highly skilled and passionate Senior Engineer, Blockchain Platforms, to play a pivotal role in shaping the foundational infrastructure of our digital asset ecosystem. This is a unique opportunity to directly impact the security, scalability, and resilience of our blockchain operations, working hands‑on to integrate and build the core components that underpin our next-generation financial services. Your expertise will be crucial in translating complex blockchain mechanics into enterprise-grade solutions, driving innovation and ensuring the integrity of our custody and tokenization platforms.

What You Will Do

As a Senior Engineer, you will be a hands‑on contributor, operating at the intersection of blockchain protocol mechanics and institutional custody systems. You will work closely with lead engineers and security experts to ensure all blockchain interactions are secure, reliable, observable, and production-ready. Your contributions will establish strong foundations for scalable digital-asset custody and tokenization platforms, ensuring predictable, observable, and resilient integrations.

• Integrate institutional systems with existing Layer-1 blockchains, evaluating and extending capabilities to meet custody, scalability, and resiliency needs.
• Deeply understand chain-level mechanics such as transaction lifecycle, finality, forks, reorgs, and event propagation to ensure reliable integrations under stress and production loads.
• Design and build core blockchain infrastructure services, including indexers, event processors, block explorers, observability tooling, chain data services, APIs, and interoperability components.
• Ensure blockchain data pipelines are accurate, performant, and auditable, supporting operational tooling for troubleshooting, monitoring, and incident response.
• Contribute to wallet architecture and development, focusing on blockchain-facing wallet services, transaction creation, signing workflows, and submission pipelines.
• Integrate with custody key management systems (MPC, HSMs, signing services), ensuring clean separation of protocol logic, security controls, and business rules.
• Partner closely with custody and security engineers to validate end-to-end transaction flows and ensure wallet and transaction pipelines behave correctly across normal and edge-case chain conditions.
• Share responsibility for custody-related blockchain workflows, including on-chain transaction execution, event monitoring, reconciliation, and chain-specific failure handling and recovery patterns.
• Help define safe patterns for interacting with smart contracts and token standards from custody platforms, ensuring workflows align with custody policies, approvals, and risk controls.
• Apply modern engineering practices to build reliable, testable, and observable blockchain services, leveraging AI tools to accelerate protocol analysis, code development, testing, documentation, and knowledge sharing while maintaining engineering rigor.

Required Qualifications

• 7+ years of professional software engineering experience.
• Hands‑on experience building or integrating blockchain or distributed ledger systems.
• Strong understanding of Layer-1 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 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.
• 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 edge-case chain conditions.
• Custody systems interact with blockchains safely and consistently.
• Incidents related to blockchain dependencies are well understood and quickly diagnosed.

Other Requirements:

The target hiring compensation range for this role is $81.00/hr to $90.00/hr. Compensation is based on several factors including, but not limited to education, relevant work experience, relevant certifications, and location.

Aquent is an equal-opportunity employer. We evaluate qualified applicants without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability, veteran status, and other legally protected characteristics. We're about creating an inclusive environment - one where different backgrounds, experiences, and perspectives are valued, and everyone can contribute, grow their careers, and thrive.