Job Summary: Senior Data Analyst to support and evolve the data platform, ensuring performance and reliability in highly critical environments. Key Highlights: 1. Working with large volumes of data, cloud environments, and high-performance systems 2. High technical exposure to AWS/OCI and critical databases 3. Engagement with mission-critical environments and development of technical maturity We are an international telecommunications company operating in the labor market since 2017\. Join this company — we are a leader in providing white-label technology platforms to organizations across diverse sectors, enabling them to become operators and offer mobile plans and connectivity services under their own brand. If you enjoy working with **large volumes of data, cloud environments, and high-performance systems**, this opportunity is for you. We are seeking a **Senior Data Analyst** to strengthen the evolution of our data platform and drive strategic decisions through technology. **Responsibilities and Duties** **What is the purpose of this position?** * Responsible for supporting, evolving, and optimizing the company’s data ecosystem, including administration of relational and non-relational databases, distributed processing, and analysis of large-scale data in cloud environments (AWS and OCI). * This professional will play a key role in ensuring database performance, availability, and reliability, supporting technical decision-making and contributing to the evolution of data architecture within a mission-critical environment. **Why does this role exist, and what results are expected?** Responsible for supporting and evolving the company’s data platform, including administration of relational and non-relational databases, distributed processing using Python/PySpark, and large-scale data analysis in AWS environments. The professional will ensure performance, availability, and reliability of databases, supporting the evolution of data architecture in a highly critical environment. **What limitations or potentialities does this role offer?** **Limitations** * Highly critical environment, which may require working under pressure during incident resolution. * Scope focused on data engineering and operations—not a role oriented toward data science or advanced statistical modeling. **Potentialities** * High technical exposure: direct involvement with cloud environments (AWS/OCI), critical databases, and large-volume data processing. * Engagement with mission-critical environments: development of technical maturity in high-responsibility scenarios. **Activities to be performed:** * Administer and optimize MySQL, PostgreSQL, Redis, and DynamoDB databases. * Manage and configure RDS (MySQL/Aurora) on AWS. * Develop and maintain distributed data processing routines using Python and PySpark. * Create and optimize complex SQL queries with a focus on performance. * Use Amazon Athena for large-scale data analysis. * Support maintenance and evolution of Big Data environments (Hadoop). * Ensure best practices for backup, recovery, monitoring, and data security. * Perform troubleshooting on Linux environments related to data systems. * Collaborate with backend and product teams to evolve the data architecture. **Behavioral Competencies we seek:** **Analytical Thinking and Logical Reasoning** Ability to interpret complex scenarios, identify root causes, and propose structured solutions to data-, performance-, and infrastructure-related problems. **Problem Solving** Ability to act practically and objectively during technical incidents—assessing impact, prioritizing actions, and implementing responsible solutions. **Clear Technical Communication** Ability to translate technical problems for various audiences (development team, product team, management), facilitating alignment and decision-making. **Collaboration and Teamwork** Collaborative attitude when working with multidisciplinary teams (backend, infrastructure, product), contributing to continuous evolution of the data architecture. **Requirements and Qualifications** * Solid experience in Linux environments, supporting administration and development activities. * Practical knowledge of relational databases (MySQL and PostgreSQL). * Familiarity with non-relational databases (Redis and DynamoDB). * Experience with Amazon Athena for large-scale data queries and analysis. * Hands-on experience with Python and PySpark for distributed data processing. * Experience with the Hadoop ecosystem and Big Data tools. * Strong SQL proficiency, including: * Writing complex queries * Analyzing and supporting query performance optimization **Preferred Qualifications:** * Experience administering Aurora. * Knowledge of OCI. * Experience with the Hadoop ecosystem. * Experience automating DBA routines. * Prior experience in high-availability or mission-critical environments. **Additional Information** * Bradesco Health Plan — 100% covered by the company. * Amil Odonto Dental Plan — 100% covered by the company. * Meal and Food Allowance (Alelo) — R$ 1\.320,00 * Life Insurance. * Corporate SIM card. * Wellhub — partnership with gyms. * TotalPass — partnership with gyms. * Birthday Allowance. * Transportation Allowance. **Salary:** To be discussed. **Work Schedule:** 5x2 **Working Hours:** 08:00 to 17:48 **(100% on-site).** **Company Location:** Near Berrini Station — Emerald Line. **What We Offer:** * Dynamic and challenging environment with continuous learning opportunities. * Direct engagement with modern technologies and up-to-date tech stacks. * Involvement in high-impact business projects. * Opportunities for technical and professional growth. Surf Telecom is an international company operating in the Brazilian telecommunications sector since 2017\. We are the fourth-largest mobile operator in Brazil and a leader in delivering platforms across multiple sectors, enabling our partners to offer mobile plans and connectivity services under their own brand. Through a technology-driven model, we deliver fast, flexible, and simple solutions so that all businesses can add value and provide new choices, reaching every region of Brazil. A leader in customer service, we were awarded the RA 1000 Award by Reclame Aqui in 2021, 2022, and 2024 — https://www.reclameaqui.com.br/empresa/correios\-celular/ Come surf with us!