Nurbek Mynbai

Blue Team Skills

Worked with Splunk for event monitoring and log correlation in simulated lab environments Analyzed Windows and Linux logs during real attack simulations Performed alert triage and log correlation in Splunk lab environments Used Jira and Service Desk workflows for incident tracking and documentation Documented security findings, configurations, and operational procedures Analyzed phishing, brute-force, persistence, and privilege escalation scenarios in controlled lab environments

Backend & Security Project

Developed authentication system with JWT and RBAC using Spring Security Implemented audit logging for authentication events, token usage, failed logins, and privileged actions Investigated suspicious authentication activity through log analysis Implemented brute-force mitigation controls including rate limiting and account lockout Configured security headers and access control mechanisms to reduce attack surface Simulated attack scenarios including credential abuse and unauthorized access attempts Built REST API and web interface for testing authentication flows and access control Analyzed authentication logs to identify failed login patterns and suspicious behavior Worked with Linux and application logs for troubleshooting and security analysis Stack: Java, Spring Boot, Spring Security, JWT, JPA, MySQL, Thymeleaf Project: github.com/bltbkly/production-grade-auth-system

Cisco

Designed & implemented a multi-site enterprise network connecting two distributed office buildings Implemented VLAN segmentation across 10+ networks Implemented dynamic routing using OSPF to ensure scalable and efficient routing between sites Designed secure site-to-site connectivity using GRE over IPsec tunnel Configured secure remote access (SSH, AAA) Implemented PPP with CHAP and PAP authentication for secure router-to-router communication Applied ACL policies to restrict unauthorized inter-network traffic and enforce security boundaries Configured NAT for controlled external network access Implemented link redundancy and load balancing using LACP and RSTP Deployed DHCP services for automated IP address allocation across VLANs Troubleshot network connectivity and security issues across segmented VLAN environment Technologies: Cisco Packet Tracer, OSPF, VLAN, ACL, NAT, GRE, IPsec, MPLS, LACP, RSTP, PPP, DHCP, FTP Project: github.com/bltbkly/enterprise-network-cisco