Senior Cybersecurity Analyst: Real-Time Threat Detection

Sigma Software; Województwo mazowieckie; Presencial; PLN 180.000 - 240.000; Jornada completa

Descripción de la vacante

Sigma Software is seeking a Senior Cyber Security Analyst to identify, investigate, and mitigate malicious web activity across large-scale digital environments. You will join a team focusing on threat analysis, traffic investigation, detection engineering, and customer collaboration.

You will work with high-volume datasets, analyze suspicious patterns, and develop detections for bots, fraud, and other web threats, partnering with engineering and customers to improve protection and visibility.

Formación

• 3–5 years of experience in Cybersecurity, Threat Research, or Threat Intelligence.
• Bachelor’s degree in Computer Science, Cybersecurity, Information Security, or a related field.
• Strong understanding of web technologies and networking fundamentals, including HTTP/HTTPS, TCP/IP, DNS, authentication, cookies, and browser-server interactions.
• Experience in web security research, bot management, fraud detection, or related domains.
• Hands-on experience with threat investigations, IOC analysis, and threat intelligence research.
• Experience with log analysis and investigation platforms such as Kibana/OpenSearch, Snowflake, Datadog, or similar tools.
• Strong SQL skills, including working with large datasets and UDFs.
• Basic knowledge of JavaScript for web and client-side analysis.
• Strong analytical and problem-solving skills.
• Ability to work independently and manage investigations with minimal supervision.
• Strong communication and collaboration skills.
• Passion for cybersecurity and continuous learning.

Responsabilidades

• Monitor and investigate potential security threats using tools such as Kibana/OpenSearch and Snowflake.
• Analyze security logs and investigate suspicious or unusual activity, including spikes in traffic, unexpected changes in attack patterns, and new or disappearing attack signals.
• Determine whether detected activity is malicious or benign and identify the appropriate response, including detection engineering to block malicious activity when needed.
• Develop, tune, and deploy detection rules based on traffic behavior, HTTP request attributes, headers, device fingerprints, and other indicators to mitigate malicious activity.
• Monitor existing detections and known attack patterns to make sure they continue to work as expected and identify any unusual changes in volume, sources, IPs, domains, or other indicators.
• Support customer onboarding by analyzing web application traffic flows and configuring baseline detection and protection rules.
• Investigate customer-reported incidents and missed detections, analyze attack traffic, and implement mitigations to improve protection coverage.
• Document newly discovered threats and attacks, including evidence, findings, and indicators.
• Communicate findings to Engineering and other stakeholders and provide the necessary technical details to support remediation and improvements to detection and protection mechanisms.
• Partner directly with counterparts through a ticketing system and support portal to investigate issues, provide updates, and resolve security-related requests.

Conocimientos

Cybersecurity

Threat Research

Threat Intelligence

SQL

Web Technologies

Communication

Independent Investigation

Educación

Bachelor's degree in CS/Cybersecurity

Herramientas

Kibana/OpenSearch

Snowflake

Datadog

Descripción del empleo

Sigma Software is seeking a Senior Cyber Security Analyst to identify, investigate, and mitigate malicious web activity across large-scale digital environments. You will join a team focusing on threat analysis, traffic investigation, detection engineering, and customer collaboration.

You will work with high-volume datasets, analyze suspicious patterns, and develop detections for bots, fraud, and other web threats, partnering with engineering and customers to improve protection and visibility.