Staff Software Engineer (Crypto, SV) US IC7 2026

Nu is the leading digital bank in Latin America serving 135 million customers across Brazil Mexico and Colombia. The company has been leading an industry transformation by leveraging data and proprietary technology to develop innovative products and services.

Guided by its mission to fight complexity and empower people Nu caters to customers complete financial journey promoting financial access and advancement with responsible lending and transparency. The company is powered by an efficient and scalable business model that combines low cost to serve with growing returns.

Nus impact has been recognized in multiple awards including Time 100 Most Influential Companies Fast Companys Most Innovative Companies and Forbes Worlds Best Banks.

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Nu is building the backend and platform foundations that connect its products to blockchain networks. As a Staff Software Engineer you will set technical direction for capabilities such as onchain data transaction construction and execution signing and custody integrations asset movement between wallets and entities smart-contract integrations and the infrastructure required to operate these systems securely at global scale.

Your scope will span shared capabilities used by multiple product teams. You will own critical architecture lead multi-quarter technical decisions and establish standards for security reliability data integrity and operational readiness across team boundaries. Distributed-systems depth and production ownership are essential; meaningful experience in one or more relevant crypto domains matters more than checking every box.

You will partner closely with product security compliance and engineering teams lead the response to major technical risks and production incidents and mentor senior engineers. Success means improving not only the systems you directly build but how the broader crypto engineering area designs and operates critical infrastructure.

• Define the technical strategy and architecture for backend systems that connect Nubank products to blockchain networks.

• Design and operate shared capabilities for onchain data transaction execution signing and custody boundaries asset movement between wallets and entities and smart-contract integrations.

• Establish secure transaction lifecycles trust boundaries threat models failure handling and defensive controls for high-stakes crypto infrastructure.

• Create APIs and platform abstractions that allow product teams to use blockchain capabilities without reproducing protocol complexity or weakening controls.

• Drive multi-team standards for reliability observability data integrity auditability testing disaster recovery and production readiness.

• Lead critical design reviews major-incident response root-cause analysis and durable follow-up work across team boundaries.

• Partner with security compliance and product leaders to translate technical and regulatory constraints into scalable system designs.

• Mentor senior engineers and raise the area-wide bar for architecture technical decision-making and operational ownership.

Required

• A track record of Staff-level impact designing and operating critical backend or platform systems used by multiple teams.

• Deep experience with distributed systems at scale including transaction processing eventual consistency failure handling high availability and production operations.

• Production ownership of regulated or high-stakes financial movement blockchain integrations or adjacent money-moving infrastructure.

• Meaningful production experience in at least one of the following: DeFi custody key management or signing flows asset movement between wallets and entities or smart-contract integrations.

• Experience designing security-sensitive systems using threat modeling explicit trust boundaries defensive architecture and rigorous review processes.

• Demonstrated ability to define shared-platform architecture and drive adoption across multiple engineering teams.

• Experience leading complex production incidents and improving systems and operating practices afterward.

• Strong influence communication and mentorship skills including the ability to align teams without relying on reporting authority.

Nice to have

• Experience integrating with multiple blockchain networks or protocol families.

• Experience with custodial wallets settlement on/off-chain movement on/off ramps node operations or blockchain data systems.

• Familiarity with HSMs secure enclaves or hardware-backed key-management systems.

• Experience in regulated fintech banking payments or institutional digital-asset infrastructure.

• Experience reviewing smart-contract security or integrating with DeFi protocols in production.

Palo Alto United States

• Opportunity of earning equity at Nu

• Medical Insurance

• Dental and Vision Insurance

• Life Insurance and AD&D

• Extended maternity and paternity leaves

• Nucleo Our learning platform of courses

• NuLanguage Our language learning program

• NuCare Our mental health and wellness assistance program

• 401K

• Saving Plans Health Saving Account and Flexible Spending Account

• Work-from-home Allowance

• Relocation Assistance Package if applicable

Hybrid 2-3 times/week: Our hybrid work model brings us to the office at least twice a week on strategic days designed to maximize team connection and collaboration. For more details visit how we build technology at Nubank:

recruitment process may involve the use of artificial intelligenceenabled tools such as automated interview transcription and analysis to support the evaluation process. Artificial intelligence is not used to make final hiring decisions; all decisions are made by human reviewers.

Required Experience:

Staff IC