Nubank - Principal Engineer
Requirements
• Deep Expertise in Systems: Proven deep knowledge, core competency, and active experience building high-throughput, fault-tolerant backend ecosystems at scale. • Deep Expertise in Systems • Large-Scale Abstraction Specialist: Demonstrated experience abstracting complex domain logic and standardizing libraries across large-scale distributed architectures (hundreds to thousands of microservices). • Large-Scale Abstraction Specialist • Cross-Language Proficiency: Deep understanding of polyglot architectures, runtime environments, and how core abstractions interface across multiple programming languages. • Cross-Language Proficiency • Stability Obsessed: Uncompromising belief in high-integrity, forward-compatible software design capable of operating reliably for years without breaking changes. • Stability Obsessed • Executive & Horizontal Influence: Proven ability to navigate complex organizational structures, partner with senior tech leadership, and drive unified engineering standards across teams facing high delivery pressure. • Executive & Horizontal Influence
Responsibilities
• Language Landscape Strategy: Define the 2–3 year technical direction for backend language adoption and core libraries at Nubank. Guide the evolution of supported languages and idiomatic patterns across the bank, driving migration away from legacy tooling and anti-patterns. • Language Landscape Strategy • Cross-Language & Ecosystem Architecture: Provide horizontal leadership across engineering teams and tech stacks. Design and evaluate cross-language library capabilities and architecture patterns to ensure seamless interoperability across the bank’s language landscape. • Cross-Language & Ecosystem Architecture • Library Governance & Ownership: Solve core library ownership challenges by rationalizing an ecosystem of 4,000+ microservices and dependencies. Prevent uncoordinated breaking changes and establish active stewardship for shared foundational components. • Library Governance & Ownership • AI-Ready Engineering: Architect foundational libraries, abstractions, and developer workflows optimized for AI-driven development cycles and code generation tools. • AI-Ready Engineering • Open Source Stewardship: Lead Nubank’s contributions to and maintenance of critical open-source software libraries and core foundational frameworks. • Open Source Stewardship • Strategic Leadership & Mentorship: Act as a technical counterweight to product teams to safeguard foundational stability, security, and long-term reusability. Mentor senior engineers and influence General Managers and Engineering Directors. • Strategic Leadership & Mentorship
Benefits
• This role reports directly into senior technical leadership. You will have the mandate to fix the foundation of one of the world's most sophisticated technical environments. We are committed to finding the right structural balance for the world’s top specialized talent. • If you are energized by these challenges and want to work with a world-class, senior team defining the next decade of fintech at scale, ensuring our foundational libraries remain the stable, elegant bedrock of Nubank’s global evolution, this is the place for you! • Our recruitment process may involve the use of artificial intelligence–enabled 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.
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