Application Security
Web application vulnerability assessment, secure code review, and security testing methodologies.
Core SpecialtyOpen to remote cybersecurity opportunities and EU-based roles.
Mallikharjun Swamy Sudnagunta
Infrastructure EngineerSecurity Engineer
Technology professional with extensive experience across Linux infrastructure, systems administration, security research, offensive security, automation and security engineering.
Professional Focus
Core specialties built on 20+ years of technology experience spanning infrastructure, security research, and engineering.
API Security
REST/GraphQL API security testing, authentication/authorization flaws, and business logic vulnerabilities.
Core SpecialtyVulnerability Research
Zero-day hunting, exploit development, and advanced vulnerability analysis across web and API surfaces.
Core SpecialtyOffensive Security
Authorized penetration testing, red team exercises, and adversary simulation under strict ROE.
Core SpecialtySecurity Automation
Custom tooling, reconnaissance automation, scanning orchestration, and workflow optimization.
Core SpecialtyLinux Infrastructure
Systems administration, server hardening, virtualization, networking, and infrastructure automation.
Core SpecialtySecurity Research
Independent vulnerability research and responsible disclosure across authorized security programs.
YesWeHack
Substantial report activity, security research history, vulnerability categories, responsible disclosure activity
@arjun456
HackerOne
Security research, vulnerability validation, and technical reporting
@arjun456
Bugcrowd
Gray-box penetration testing and enterprise security testing
@arjunasha46
Research Areas
Web Application SecurityAPI SecurityAuthenticationAuthorizationAccess ControlBusiness LogicXSSSQL InjectionCSRFInformation DisclosureVulnerability ValidationReconnaissanceSecurity AutomationAttack Surface Mapping
Selected Projects
Security tooling, automation, and research projects.
VulnDesk
Security ToolingVulnerability management and security automation platform for researchers
TypeScriptReactNode.jsPostgreSQLDocker+1 more
Reconnaissance AutomationVulnerability ManagementSecurity Workflow Orchestration
Career Snapshot
A technology career evolving from infrastructure and operations into security research and engineering.
1999–2002
Early Career
Data processing, warehouse operations, information management
2002–2004
Linux Systems & Help Desk
EPIC-NIC: Linux admin, Windows/macOS support, network hardening
2004–2006
IT Project Coordination
PVR Projects: Project tracking, timeline coordination, budget alignment
2010–Present
Infrastructure Consulting
Self-employed: Client infrastructure, hosting, virtualization, WordPress
2017–2019
Logistics Operations
Swiggy Instamart: Fleet logistics and delivery operations
2022–Present
Security Research
HackerOne, YesWeHack, Bugcrowd: Vulnerability research, offensive security
CYBERSECURITY
Security research, offensive security, and vulnerability analysis
3 Roles
INFRASTRUCTURE & CONSULTING
Linux systems, hosting, and infrastructure engineering
3 Roles
ADDITIONAL EXPERIENCE
Operations, logistics, and early career roles
3 Roles
Technical Capabilities
Tools, methodologies, and technical domains applied across security research and infrastructure engineering.
Security Testing
Burp Suite ProfessionalOWASP ZAPNuclei / Custom TemplatesFFUF / Gobuster / DirsearchSQLMapCustom Python/Bash Scripts
Reconnaissance & Discovery
Subdomain EnumerationAttack Surface MappingAsset Discovery & MonitoringTechnology FingerprintingAPI Endpoint DiscoveryParameter Discovery
Vulnerability Classes
XSS (Reflected, Stored, DOM)SQL InjectionCSRFAuthentication BypassAuthorization Flaws (IDOR, BOLA)Business Logic VulnerabilitiesServer-Side Request Forgery (SSRF)Template Injection (SSTI)Information Disclosure
Infrastructure & Automation
Linux Systems AdministrationDocker / ContainerizationNginx / Apache ConfigurationCI/CD Pipeline SecurityInfrastructure as CodeNetwork Configuration & HardeningBackup & Disaster RecoveryServer Migration & Optimization
Development & Tooling
Python (Automation, Tooling)Bash/Shell ScriptingGit Version ControlREST/GraphQL API TestingPostman / Custom ClientsMarkdown DocumentationJira / Confluence
Professional Profiles
Verified presence across security platforms, development communities, and professional networks.
Development
GitHub
github.com
www.linkedin.com
Security Platforms
YesWeHack
yeswehack.com
HackerOne
hackerone.com
Bugcrowd
bugcrowd.com
Freelance
Fiverr
fiverr.com
Design
Behance
behance.net
Figma
figma.com
Ready to Collaborate?
Open to remote cybersecurity opportunities, EU-based roles, and challenging security engineering positions.
2026 MasterGuyArjun — Mallikharjun Swamy Sudnagunta