Staff Software Engineer (Crypto, SV) - US - IC7 - 2026

As a Staff Software Engineer in Crypto at Nubank, you will set technical direction for the backend and platform foundations that connect Nubank's products to blockchain networks. Your scope spans shared capabilities used by multiple product teams, including onchain data, transaction construction and execution, signing and custody integrations, asset movement between wallets and entities, and smart-contract integrations. You will own critical architecture, lead multi-quarter technical decisions, and establish standards for security, reliability, data integrity, and operational readiness across team boundaries.

What you'll do

• 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.

What you bring

• 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.

What we offer

• Equity at Nubank
• Medical, dental, and vision insurance
• Life insurance and AD&D
• Extended maternity and paternity leave
• Nucleo, a learning platform of courses
• NuLanguage, a language learning program
• NuCare, a mental health and wellness assistance program
• 401k
• Health Savings Account and Flexible Spending Account options
• Work-from-home allowance
• Relocation assistance package, if applicable
• Hybrid work model (2-3 days per week in Palo Alto)

About Nubank

Nubank is the leading digital bank in Latin America, serving 135 million customers across Brazil, Mexico, and Colombia. The company transforms the financial services industry by leveraging data and proprietary technology to develop innovative products and services, guided by a mission to fight complexity and empower people.