Rajan Kumar

Security professional with 5 years of experience across software development and Security operations, specialising in Securonix SIEM and UEBA. Strong background in security monitoring, incident analysis, and threat response involving phishing, DDoS, malware, and anomalous user/entity behaviour. Experienced in designing and developing applications and websites, contributing to full-cycle software development including requirement analysis, coding, testing, and deployment.

Hands-on expertise in SIEM content development, third-party API integrations, AD/Azure AD user enrichment, and UEBA tuning to improve detection accuracy and reduce false positives. Possesses a strong foundation in Linux-based systems and security operations, enabling secure and scalable solutions.

Technical Support Engineer - Securonix India Private Limited - Bangalore, India

(2024-01)

• Provided L2 support for a multi-tenant SaaS and on-prem SIEM platform, assisting enterprise customers with critical security data ingestion and content-related issues.
• Troubleshoot backend data pipelines associated with analytics and data ingestion.
• Implemented and supported a UEBA solution by leveraging both User Behavior Analytics (UBA) and Entity Behavior Analytics (EBA).
• Analysed and investigated security incidents such as phishing campaigns, DDoS attacks, malware infections, beaconing traffic, and lateral movement using SIEM analytics.
• Developed and supported third-party integrations using APIs to ingest and normalize security event data into the SIEM platform.
• Enabled UEBA and identity-based analytics by integrating Azure AD via LDAP for automated user data ingestion and enrichment.
• Created and customized SIEM content including use cases, threat models, dashboards, reports, and Spotter queries, to support security monitoring and detection.
• Improved customer satisfaction by promptly addressing and resolving technical issues.
• Enhanced team efficiency by providing timely and accurate technical support.
• Maintained detailed case documentation and developed a comprehensive knowledge base of common technical issues, enabling effective tracking of customer issue trends and ensuring faster resolution of future inquiries.
• Collaborated with engineering and product teams to escalate platform-level bugs and recommend architectural improvements.
• Managed end-to-end data source onboarding-from connector deployment and log validation to OOTB/custom parser and content mapping-while also debugging parsers, resolving log format issues, and fine-tuning correlation rules to enhance detection accuracy.
• Managed incident response, technical escalations, and service requests within SLA guidelines.
• Maintained IEE, AEE, Traffic, Event Rarity, and Land Speed policies while troubleshooting violation and incident generation issues related to correlation rules.

Software Developer - Girmiti Software Private Limited - Bangalore, India

(2022-11 - 2023-08)

• Developing and creating React and Angular applications as per specifications
• Designed, Developed, Coded, Tested and Debugged System Requirements for the purpose of Conversions and Development Project
• Identify, prioritize and carry out tasks across the software development life cycle

Assistant Software Developer - Niphal Infotech - Udaipur, India

(2021-06 - 2022-10)

• Assisted the development manager with all aspects of software design and coding
• Effectively coded software changes and alterations based on specific design specifications
• Skilled in responsive web design and ensuring seamless user experiences across devices using frameworks like Bootstrap, Tailwind CSS, and media queries.

Bachelor of Engineering - BE - Sagar Institute of Research and Technology (SIRT) (2014-07 - 2018-05)