Cyber Security Analyst

Sigma Software · São Paulo, SP, Brazil

ExclusiveRemoteFull-timePublished Jun 22, 2026

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About the role

  • Investigate advanced and persistent attacks using data analysis and data science tools
  • Analyze customers' web traffic to detect unidentified threats and reduce false positives using Elasticsearch and BigQuery
  • Research, design, and continuously enhance detection mechanisms to stay ahead of evolving threats
  • Provide real-time technical support to global customers, delivering professional and timely incident responses
  • Produce clear, insightful incident reports
  • Collaborate cross-functionally with R&D and Research teams to optimize the company's detection and mitigation capabilities
  • Design, plan, and implement internal automation projects to improve team efficiency
  • Work in a shift-based schedule, including weekends
  • At least 4 years of experience in data analysis in cybersecurity or fraud detection domains, including experience with logs and dashboards
  • Strong SQL skills: complex queries, aggregations, GROUP BY, ORDER BY, filters, window functions (e.g., RANK()), CTEs, and subqueries
  • Technical understanding of web technologies and client–server architecture (APIs, HTTP, basic HTML/JavaScript)
  • Experience with SIEM systems (experience with the Elastic Stack would be an advantage)
  • Strong troubleshooting and problem-solving skills
  • Experience in customer support, including direct communication with clients; professionalism and politeness are essential
  • Strong English communication skills

WOULD BE A PLUS

  • Experience in a Cybersecurity Analyst/Researcher role, ideally supporting external customers in threat detection and response
  • Experience in web security and security research: web application security, bot management, fraud detection
  • Experience with research methodologies (hypothesis testing, verification and research plan)
  • Python and JavaScript knowledge
  • Experience with BigQuery/Snowflake
  • Proficiency in building dashboards using BI tools (Snowflake, Looker, Kibana, JSM)
  • High level of responsibility and ownership
  • Ability to work independently with minimal supervision
  • Analytical mindset with a data-driven approach to decision-making
  • Genuine interest in data, cybersecurity, and delivering high-quality customer service
  • Proactive communicator who keeps stakeholders informed without being prompted

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