cv:
  name: Sebastião Leonardo Ribeiro Junior
  location: São Paulo, SP, Brazil
  email: me@sebastiao.me
  phone: +55-17-9-9645-7741
  website: https://sebastiao.me
  social_networks:
    - network: LinkedIn
      username: sebastiaome
    - network: GitHub
      username: sebastiaome
  sections:
    summary:
      - Software Engineer with a proven track record of delivering **high-availability solutions** for **100M+ users**. Expertise in **Node.js**, **Java**, and **Python**, with a specialized focus on **Microsservices**, **IAM (Keycloak, OAuth, OIDC)** and cloud architecture **(AWS and OCI Certified)**. Combines a strong **analytical foundation** - including data decision-making for **Brazil's National Census** - with a drive to bridge complex backend architecture and business growth.
    experience:
      - company: AI/R Company - Vivo Telefónica
        position: Software Engineer
        date:
        start_date: 2024-03
        end_date:
        location: São Paulo, SP, Brazil
        summary:
        highlights:
          - Developed and maintained critical **Java** and **Node.js** microservices for **Vivo (Telefónica)**, one of Brazil's **largest** telecommunications companies with over **100M customers**
          - Architected scalable **RESTful APIs** with **automated tests** that supported increase in digital transaction volume without performance degradation
          - Integrated and extended secure authentication flows using **Keycloak (OAuth2 and OIDC)** to support a 100M+ user identity ecosystem. Developed custom access control that **blocked unauthorized access attempts**
          - Developed scalable data solutions using **MongoDB** and **Redis** to manage high-traffic data and persistent storage
          - Developed and integrated cloud and on-premise solutions, including **Git, Kafka, Grafana, OpenTelemetry, Kubernetes, and Azure Blob Storage**, to enhance system observability and delivery
      - company: AI/R Company
        position: Software Engineer Intern
        date:
        start_date: 2023-03
        end_date: 2023-12
        location: São Paulo, SP, Brazil
        summary:
        highlights:
          - Learned the **development lifecycle** of distributed services to develop backend features in **Node.js (Nest.js)**, ensuring they met production standards
          - Assisted the engineering team in improving data flow reliability by developing integration layers for **PostgreSQL** and **Redis**, learning to optimize query performance for production environments
          - Learned enterprise **software development patterns** by assisting senior engineers in the technical design discussions
      - company: Brazilian Institute of Geography and Statistics (IBGE)
        position: Census Data Analyst
        date:
        start_date: 2022-06
        end_date: 2022-12
        location: Araraquara, SP, Brazil
        summary:
        highlights:
          - Automated data validation processes for the **National Census** using analytical tools, ensuring 99%+ data integrity across demographic datasets
          - Interpreted complex datasets to **support national-level decision-making** and **public policy development** through precise statistical reporting
    education:
      - institution: Centro Universitário Internacional
        area: Software Engineering
        degree: BS
        date:
        start_date: 2022-04
        end_date: 2026-04
        location: Araraquara, SP, Brazil
        summary:
        highlights:
    skills:
      - label: Natural Languages
        details: English (B2), Portuguese (native)
      - label: Programming Languages
        details: Typescript, Java, Javascript, Python, a little bit of Haskell
      - label: Frameworks & Runtimes
        details: Nest.js, React.js, Spring Boot, Express, Koa, Apollo, Node.js
      - label: Security & IAM
        details: Keycloak, OAuth2, OpenID Connect (OIDC), Open Policy Agent (OPA)
      - label: Data & Storage
        details: PostgreSQL, MongoDB, MySQL, AWS S3, Azure Blob Storage, Redis, Valkey
      - label: Architecture & Patterns
        details: Microservices, DDD (Domain-Driven Design), Clean Architecture, RESTful APIs, Functional Programming
      - label: Certifications
        details: AWS Certified Cloud Practitioner, OCI Certified Developer Professional, OCI Certified Data Science Professional, OCI Certified Generative AI Professional
design:
  theme: engineeringresumes
  templates:
    top_note: ""
locale:
  language: english