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Otavio Salles

@otaviosalles

Fraud and risk analyst at Nubank who used SQL to detect anomalies and improve rule-based decisions across customer security.

Brazil

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At Nubank, I analyzed fraud and regulatory cases involving BACEN, Procon, and CGOV, and translated findings into improvements to controls, policies, and compliance processes.

I assessed customer risk in large-scale transactional data using SQL, developed behavioral features for anomaly detection, and refined rule-based decision systems aligned with credit policy.

I also built automated Looker dashboards to track risk and operational KPIs, and created SOPs, RFCs, and playbooks to support consistent risk evaluation.

In my current role at an independent family-owned e-commerce business, I manage operations and customer records. In 2026, I built its e-commerce website and Instagram storefront, set up Meta Business Suite, and launched segmented Meta Ads campaigns.

Experience

Work history, roles, and key accomplishments

Current

Operations & Customer Relations Analyst

Current

Independent E-commerce Business

Nov 2024 - Present (1 year 10 months)

Managed day-to-day operations for an independent e-commerce brand, including customer verification, record-keeping, and multi-channel support. Built the brand's digital presence and launched audience-segmented Meta Ads campaigns, growing Instagram to 1,800+ followers.

E Commerce Operations Client Relations Meta Ads Instagram WhatsApp Digital Marketing Data Analysis

Mid-level Analyst – Customer Security

Nubank

Sep 2022 - Nov 2024 (2 years 2 months)

Analyzed fraud and regulatory cases (BACEN, Procon, CGOV) and performed customer risk assessments on large-scale transactional data using SQL. Designed rule-based decision systems, built dashboards in Looker, and created SOPs and playbooks to standardize risk evaluation.

SQL Fraud Detection Risk Assessment Regulatory Compliance Looker Data Warehouse SOPs RFC Anomaly Detection Feature Engineering Python Agile

Junior Analyst – Customer Security

Nubank

Jul 2021 - Sep 2022 (1 year 2 months)

Acted as a technical reference in high-criticality security and fraud cases, connecting customers with Engineering teams. Monitored operational queues and proposed process improvements based on data analysis.

Fraud Analysis Security Data Analysis Process Improvement SLA Management

Customer Success Analyst – Specialized Support

Riot Games

May 2018 - Apr 2019 (11 months)

Managed high-criticality cases involving account recovery and digital security, ensuring platform integrity. Resolved user conflicts and enforced platform policies through evidence-based analysis.

Customer Support Account Recovery Digital Security Policy Enforcement Conflict Resolution