Nubank
Senior Staff Systems Engineer - Performance Engineer - JVM
Miami · Staff+
Sponsorship not specifiedDetected 3 days ago
JavaAlgorithmsAWSCloud PlatformsKubernetesLinuxSystems EngineeringCollaborationMentoring
About the role
- You will be responsible for leading complex performance investigations, identifying systemic bottlenecks, and driving efficiency across one of the largest JVM-based microservice architectures in the world.
- Our core principles and behaviors include ownership, simplicity, veracity-first, teamwork, and a focus on quality over quantity.
- During a normal work day, you will interact with critical infrastructure layers, from the Linux Kernel and JVM internals to cloud-wide orchestration.
Responsibilities
- Drive initiatives to reduce infrastructure costs and latency by fine-tuning JVM parameters, Garbage Collection (ZGC, G1), and memory management (heap and off-heap).
- Design and deliver innovative infrastructure improvements that address long-term performance challenges, ensuring our systems scale ahead of demand.
- Optimizing Resource Efficiency: Drive initiatives to reduce infrastructure costs and latency by fine-tuning JVM parameters, Garbage Collection (ZGC, G1), and memory management (heap and off-heap).
- Architecting Scalable Solutions: Design and deliver innovative infrastructure improvements that address long-term performance challenges, ensuring our systems scale ahead of demand.
- Anticipate technical and product issues, making appropriate design decisions to avoid them
- Our recruitment process may involve the use of artificial intelligence-enabled tools, such as automated interview transcription and analysis, to support the evaluation process.
Requirements
- Deep, low-level knowledge of the JVM is essential.
- Extensive experience with GC algorithms (ZGC, G1, Shenandoah), including the ability to tune them for massive heaps and ultra-low latency requirements.
- Extensive experience with cgroups and the impact of CPU Throttling on JVM quotas within Kubernetes/EKS.
- Proven ability to diagnose and resolve complex concurrency problems, including lock contention and race conditions at the instruction level.
- Expertise in JVM Internals: Deep, low-level knowledge of the JVM is essential.
- JVM Tuning & Garbage Collection: Extensive experience with GC algorithms (ZGC, G1, Shenandoah), including the ability to tune them for massive heaps and ultra-low latency requirements.
- Resource Isolation: Extensive experience with cgroups and the impact of CPU Throttling on JVM quotas within Kubernetes/EKS.
- Concurrency: Proven ability to diagnose and resolve complex concurrency problems, including lock contention and race conditions at the instruction level.
Nice to have
- Previous experience contributing to the OpenJDK project or other low-level runtime environments is a significant advantage.
- OpenJDK Contribution (Major Plus): Previous experience contributing to the OpenJDK project or other low-level runtime environments is a significant advantage.
Skills
- Mastery of diagnostic tools such as Flamegraphs, JFR (Java Flight Recorder), eBPF, and performing large-scale heap dump analysis.
- For more details, visit https://building.nubank.com/nu-hybrid-work-model/
- Artificial intelligence is not used to make final hiring decisions; all decisions are made by human reviewers.
Benefits
- 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
- Saving Plans - Health Saving Account and Flexible Spending Account
Company info
- Share expertise on JVM internals and performance best practices with the wider Engineering team, fostering a culture of technical excellence and "quality over quantity."
- Work closely with the Computing Squad to align orchestration strategies with system performance goals, ensuring a seamless interface between infrastructure and workloads.
- 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.
This listing is sourced directly from Nubank's careers page and normalized into a canonical job model.