Senior IT Engineer (Regulatory Reliability) - MX - 2026

We are looking for a Senior Reliability Engineer to drive reliability, resilience, and operational excellence for Nubank's regulatory infrastructure. In this role, you will own critical reliability outcomes for systems that support real-time interbank transfers, regulatory integrations and key regulatory platforms. You will work across infrastructure, software, networking, security, and operations to keep mission-critical services available, observable, and resilient under demanding regulatory and operational constraints.

Responsibilities

Own end-to-end reliability for IT regulatory infrastructure services, including connectivity, transaction processing flows, and settlement-related operational workflows; Define, measure, and continuously improve SLIs, SLOs, and operational health indicators for critical transactions and platforms; Lead incident response for different severity production events, coordinate recovery, and drive high-quality postmortems with concrete follow-through on corrective actions; Design and evolve observability for the platform, with emphasis on tracing, queue health, signature validation, infrastructure signals, and early detection of degraded regulatory links or transaction bottlenecks; Plan and execute disaster recovery and business continuity exercises, including failover validation, contingency readiness, and RTO/RPO verification; Reduce operational toil through automation, tooling, and improved runbooks for recurring failure and operational procedures; Drive capacity planning and performance engineering to ensure the platforms can safely absorb peak transaction volumes and evolving business demand; Partner closely with security, networking, middleware, and software engineering teams to improve platform hardening, resilience, and change management safety; Participate in an on-call rotation

Requirements

5+ years of SRE, DevOps, or production engineering experience operating mission-critical, high-availability systems; Hands-on experience with IT infrastructure platforms, virtualized and hyperconverged environments such as VxRail, and physical production infrastructure; Hands-on experience with Linux systems, including performance tuning, kernel parameters, and security hardening; Track record leading incident response and postmortem processes for customer-impacting services; Solid knowledge of networking fundamentals: TCP/IP and routing; Proficiency in at least one scripting or programming language (Python, Shell scripting) for automation and tooling; Experience with observability stacks (Prometheus, Grafana) and distributed tracing; AWS infrastructure experience across services like EC2, S3, CloudWatch, KMS, EKS/ECS, VPCs, RDS/DynamoDB, and SQS/SNS; IT Regulatory audit experience, including evidence gathering, control validation, audit prep, and remediation follow-through; Experience with infrastructure-as-code tools (like Puppet) and Git-based workflows; Working knowledge of AI-assisted engineering tools (Claude, Cursor, Claude Code); Strong written and verbal communication skills in Spanish and English

Nice to have

Experience with Mexican payment rails (SPEI); SQL knowledge for operational analysis and troubleshooting; Relevant cloud (AWS Certified Cloud Practitioner certification or higher) or IT infrastructure certifications

Benefits

Chance of earning equity at Nu; Extended maternity and paternity leaves; Health and life insurance; Dental and Vision Insurance; NuCare - Our mental health and wellness assistance program; Nucleo - Our learning platform of courses; NuLanguage - Our language learning program; Holiday Bonus ("Aguinaldo") of 30 days of pay per year; 17 days of paid vacation with 25% vacation bonus; Gym partnership; Food card; Work-from-home Allowance; Parental Consultancy; Relocation Assistance Package, if applicable