Senior Blockchain Infrastructure Engineer

Overview

Aquent is proud to partner with a pioneering financial institution that stands at the forefront of digital asset innovation. This organization is not just adapting to the future of finance; they are actively building it, integrating cutting-edge blockchain technology to forge secure, reliable, and scalable platforms for digital asset custody and tokenization. Their mission is to deliver robust and innovative solutions that empower clients in the rapidly evolving digital economy, and you will be a crucial part of making that vision a reality.

About the Opportunity

Imagine being at the epicenter of the digital asset revolution, where your expertise directly shapes the foundational infrastructure of next-generation financial services. We are seeking a highly skilled and passionate engineer to play a pivotal role in this transformative journey. This is a unique opportunity to directly impact the security, scalability, and resilience of blockchain operations, working hands-on to integrate and build the core components that underpin digital asset custody and tokenization platforms. Your contributions will be instrumental in translating complex blockchain mechanics into enterprise-grade solutions, driving innovation, and ensuring the integrity of these critical systems.

What You Will Do

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

• Integrate institutional systems with existing Layer-1 blockchains, evaluating and extending capabilities to meet demanding custody, scalability, and resiliency needs.
• Develop a deep understanding of 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.

Your Impact and Success in this Role

Your success will be measured by the robustness and predictability of the systems you build. You will know you’re making a significant impact when:

• 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.

Must-Have 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.

Nice-to-Have 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 using AI tooling to support complex software development.

About Aquent Talent

Aquent Talent connects the best talent in marketing, creative, and design with the world’s biggest brands.
Our eligible talent get access to amazing benefits like subsidized health, vision, and dental plans, paid sick leave, and retirement plans with a match. We also offer free online training through Aquent Gymnasium. More information on our awesome benefits!
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.

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