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I am a dedicated Security Researcher and DevSecOps Engineer with a profound passion for cybersecurity and system integrity. My career revolves around ensuring the safety, resilience, and efficiency of digital systems by combining advanced technical expertise with a proactive approach to identifying and mitigating risks. As a Cybersecurity Engineer and Analyst, I specialize in securing infrastructure, analyzing vulnerabilities, and implementing robust security measures across diverse environments. With a strong background in Linux system administration, CI/CD pipelines, and containerization, I bring a holistic approach to integrating security into every stage of the software development lifecycle. My expertise extends to penetration testing, OSINT, automation, and creating tailored CLI utilities for enhanced productivity and security. I am adept at identifying and resolving system vulnerabilities, ensuring compliance with industry standards, and optimizing operational workflows. Whether it’s safeguarding digital assets, implementing DevSecOps practices, or performing in-depth security analyses, I am committed to delivering solutions that protect and enhance your organization's technological infrastructure. Let's collaborate to build secure, efficient, and future-ready systems.

I secure, harden, and monitor Linux servers for businesses that cannot afford downtime, breaches, or blind spots in their infrastructure. 100% Job Success | Top Rated | 1,300+ hours on Upwork. If your servers lack proper monitoring, your SIEM is not deployed, your firewall rules are a mess, or your DNS keeps breaking, I fix it properly, not temporarily. What I deliver: - Wazuh SIEM/XDR deployment: full setup, agent enrollment, custom rules, dashboards, and alerting across Linux and Windows endpoints - Server monitoring stacks: Wazuh, Zabbix, Nagios, Grafana - deployed, configured, and tuned to reduce alert noise - Linux server hardening to production-grade standards (Ubuntu, Debian, CentOS) - Firewall policy design and enforcement (UFW, iptables, pfSense) - DNS architecture with failover, DNSSEC, and SPF/DKIM/DMARC for email security - Cloud infrastructure security across AWS, Azure, GCP, and DigitalOcean - NGINX and Apache optimization for high-traffic environments - CI/CD pipeline security and infrastructure automation with Docker and Bash - Log analysis, threat detection, and incident response Recent work: - Deployed and managed Wazuh SIEM across multi-server environments with real-time alerting and compliance monitoring - Built hardened Linux environments for production workloads and educational content delivery - Architected DNS with failover for multi-region deployments Experience includes serving as Cybersecurity & Infrastructure Manager for a venture firm, Senior DNS & Network Security Engineer at a security company, and Infrastructure & Security Consultant for a US-based consulting firm. I respond within 5 hours. Message me with details about your server, monitoring, or security challenge and I will tell you exactly how I can help.

Senior Linux & Cloud Infrastructure Engineer | 5+ Years Managing Production Environments I help businesses achieve 99.9%+ uptime, reduce infrastructure costs, and scale their web applications securely. ✅ PROVEN TRACK RECORD: - Currently managing 60+ production Linux servers (Ubuntu, CentOS, RHEL) for enterprise clients - Reduced server response time by 40% through optimization and CDN integration - Implemented automated backup systems saving clients 15+ hours/week - Zero critical security breaches in 5 years through proactive hardening 💼 CORE EXPERTISE: → Linux Server Administration (Ubuntu, CentOS, RHEL, Debian) → Cloud Platforms: AWS (EC2, S3, Route 53, IAM), Azure, Google Cloud → WordPress Infrastructure: GridPane, LiteSpeed, ModSecurity WAF, Cloudflare → Microsoft 365 & Azure AD: Full tenant management, MFA, Conditional Access → Automation: Ansible, Bash scripting, Infrastructure as Code → Security: WAF configuration, DDoS protection, STIG compliance, Wazuh SIEM → Virtualization: Proxmox, VMware ESXi, Hyper-V → Monitoring: Zabbix, Grafana, Prometheus, Loki 🎯 I SPECIALIZE IN: ✓ High-availability WordPress hosting architecture ✓ Server migration with zero downtime ✓ Security hardening and compliance (ModSecurity, OWASP rules) ✓ Microsoft 365 administration and migration ✓ Custom automation to reduce manual tasks ✓ Emergency server recovery and troubleshooting 📊 CLIENT RESULTS: - Migrated 50+ WordPress sites with 100% data integrity - Optimized page load times from 4s to <1s through server tuning - Configured multi-layered security reducing spam by 95% - Automated reporting saving clients 20+ hours monthly 🔧 TECHNOLOGY STACK: Web Servers: Apache, Nginx, LiteSpeed Control Panels: GridPane, cPanel, Plesk, aaPanel, CyberPanel Databases: MySQL, MariaDB, PostgreSQL Mail: SendGrid, Postal Mail Server, SMTP configuration DNS/CDN: Cloudflare, Route 53, DNS management Security: ModSecurity, Cloudflare WAF, Sophos, Fortinet FortiGate RMM Tools: Atera, ConnectWise, Datto, N-able Version Control: Git, GitHub Containers: Docker 💬 COMMUNICATION & AVAILABILITY: - Available for long-term contracts and ongoing maintenance - Fluent in English with strong technical communication skills - Fast response time during business hours (UTC+5:30) - Detailed documentation for all implementations - Proactive monitoring and alerting setup 📈 WHAT CLIENTS SAY: "Sunil resolved our critical server issues in under 2 hours and implemented monitoring to prevent future incidents. His expertise saved our business during peak traffic season." 🤝 LET'S WORK TOGETHER: Whether you need server optimization, cloud migration, WordPress infrastructure, or ongoing Linux administration, I bring technical expertise and business focus to deliver results. Message me with your project requirements, and I'll provide a detailed plan within 24 hours.

🔐 Certified Penetration Tester | AWS & Azure Cloud Security | Incident Response Expert 🔐 I’m a results-driven cybersecurity specialist with 13+ years of experience securing cloud infrastructure, web applications, and enterprise environments. I help companies prevent breaches, mitigate risks, and ensure compliance through advanced security architecture and real-world offensive security skills. 🎯 What I Do: ✔️ Cloud Security Hardening – AWS (IAM, EC2, S3, VPC, RDS, Route 53) & Azure (VNET, NSGs, Azure Security Center, Defender) ✔️ Penetration Testing – Full-scope internal/external pentests, web/app/API testing, business logic abuse, OWASP Top 10 ✔️ Vulnerability Assessments – Nessus, OpenVAS, Nmap, custom exploit validation, CVSS scoring & prioritization ✔️ Threat Detection & Response – Wazuh setup, real-time event correlation, SIEM deployment, log analysis ✔️ Security Architecture – Designing scalable, secure cloud solutions with strong IAM, encryption, and DR practices ✔️ Cloudflare Optimization – Harden DNS, implement WAF rulesets, rate-limiting, Zero Trust setup ✔️ Incident Response – Triage, forensics, log collection, remediation and recovery plans (NIST, MITRE ATT&CK aligned) 📌 Security Tools I Work With: - **Offensive Security**: Burp Suite, Metasploit, Nmap, Hydra, SQLmap - **Defensive Tools**: Wazuh, AWS GuardDuty, Azure Sentinel, Nessus, Suricata - **Languages/Scripting**: Bash, PowerShell, HTML/JavaScript (for attack emulation & automation) - **Frameworks/Standards**: OWASP, MITRE ATT&CK, NIST CSF, CIS Benchmarks 🛡️ Certifications: - AWS Certified Security – Specialty - Microsoft Certified: Azure Security Engineer Associate - Licensed Penetration Tester (LPT) | Certified Penetration Testing Professional (CPENT) - CEH, CCSK 📈 Highlights: - $200K+ earned, 97% Job Success on Upwork - 9,300+ hours across 90+ successful projects - Trusted by startups, fintechs, and regulated industries (HIPAA, GDPR, SOC2) I’m known for delivering real-world, **actionable security results** — not just checkbox audits. If you’re looking to **secure your infrastructure, detect threats faster, or simulate real-world attacks**, let’s connect!

Web Penetration Testing(OWASP Top 10 methodology) | Network Penetration testing | OWASP API Security | Mobile Vulnerability Assessment(iOS and Android) | Source Code Reviews(.Net, Java, PHP) | Vulnerability Assessment and Penetration Testing | SIEM team (Cloud(AWS and Azure) Security, File Integrity Monitoring and Event Monitoring, Endpoint Security and Encryption, Data Loss Prevention, Network Access Control, Threat Monitoring (Email Traffic and Malware Analysis), Privileged Access and Identity Management) Have 7+ years of experience in both black box and white box testing penetration testing. Perform VAPT (Vulnerability Assessment and Penetration Testing) services for web applications, networks, mobile; source code reviews; malware analysis; server hardening; and security analysis etc. Conduct penetration testing in a systematic approach. Follow the standard methodology of the industry like OWASP Testing Guide v4(OTGv4); SANS top 25; NIST SP 800-115; PCI DSS to perform penetration testing so that client can concentrate on their professions without worrying about security threats. Web Application Testing: Do web application penetration testing with the latest methodology like OWASP Top-10, SANS Top-25. Perform both manual and automated penetration testing for vulnerabilities like Injection flaws(such as SQL, NoSQL, OS, and LDAP injection etc),Broken Authentication, Sensitive Data Exposure,XML External Entities (XXE), Broken Access Control,Security Misconfiguration, Cross-site scripting(XSS), Insecure Deserialization, Using Components with Known Vulnerabilities,Insufficient Logging & Monitoring. Also, perform source code reviews for many technologies like Java, NET, PHP etc. Approach for Manual Web-Application Penetration Testing: Conduct manual testing with following controls: * Configuration and Deployment Management Testing * Identity Management Testing * Authentication Testing * Authorization Testing * Session Management Testing * Input Validation Testing * Testing for Error Handling * Testing for weak Cryptography * Business Logic Testing * Client Side Testing Tools that use for Automated Web Penetration Testing: Acunetix, Burp-Suite, Netsparker, Nexpose, Nikto, IBM AppScan, HP fortify, W3af etc. Network penetration testing: Provide both external and internal network Penetration Testing so that your Network Infrastructure is secured from the real world attacks. Do both manual and automated network penetration testing. Approach for Manual Network Penetration Testing: Manually check for IDS/IPS, Server, Networks switch, Network Router, VPN, Firewalls, Anti-virus, Password etc. Tools that use for automated network penetration testing: OpenVas, Wireshark, Nessus, Metasploit, Armitage, Scapy etc. Mobile Application Penetration Testing: Perform mobile applications application penetration testing with the latest OWASP methodology(MSTG). Performed both manual and automated penetration testing for vulnerabilities like Weak Server Side Controls, Insecure Data Storage, Insufficient Transport Layer Protection, Unintended Data Leakage, Poor Authorization and Authentication, Broken Cryptography, Client Side Injection, Security Decisions Via Untrusted Inputs, Improper Session Handling, Lack of Binary Protections. Tools: Burp-Suite, HP fortify, Dex2Jar, Apktool, framework-res.apk, iNalyzer. Source Code Reviews: Perform source code reviews for both front and back-end languages. Perform source code reviews standard methodology like OWASP top 10. Do manual and automated source code reviews for various web based security vulnerabilities like SQL injection, Cross site scripting (XSS), CSRF, RFI,LFI, Authentication bypass etc. Tools: CheckMarx, IBM Appscan source for analysis, Microfocus HP Fortify. Security Analysis and Server Hardening: Regularly check and maintain your systems, servers to ensure that they comply with the standards. Do hardening application checks the item automatically on a daily basis and monitors all critical networks and server components. We support various frameworks like CIS benchmarking for Desktops & Web Browsers, Mobile Devices, Network Devices, Servers – Operating Systems, Virtualization Platforms & Cloud etc. Social Engineering: Have experience in social engineering vectors: Vishing, Phishing, Smishing, Impersonation. Used the following social engineering cycle to conduct social engineering: Gather Information: Here Information gathered from company websites, social media and other publications. Plan Attack: Next step is outline how intends to execute the attack Acquire Tools: After planning, next include computer programs that an attacker will use when launching the attack. Attack: Exploit the weaknesses in the target system. Use acquired knowledge: Information gathered during the social engineering tactics is used in attacks such as password guessing. Tools: SET(Kali-Linux); GetGoPhish

Hello! I’m Altaf Pasha, a Senior DevOps & Backend Engineer with deep hands-on experience in deploying open-source platforms, architecting backend systems, and building secure, scalable server infrastructure for production environments. I help startups, agencies, and enterprises self-host applications efficiently, reduce cloud costs, and set up reliable, production-grade systems across: Hetzner | DigitalOcean | Oracle Cloud | AWS | Vultr | Custom VPS Infrastructure 💼 Core Expertise 🔧 Backend Engineering Node.js / Express.js Python (APIs & automation) REST API architecture Supabase & Firebase backends 📦 DevOps, Containers & Orchestration Docker & Docker Compose Traefik & Caddy reverse proxy setups Scalable, production-grade container deployments Infrastructure as reusable modules ☁️ Cloud & VPS Infrastructure Linux server provisioning (Ubuntu) Hardened firewall setups (UFW, Fail2ban) Domain & DNS system design Cloudflare security, routing, and performance tuning 🛠️ Self-Hosted Platforms Deployment Experienced in deploying and managing: N8N Appwrite MinIO Gitea Penpot Umami / Plausible And a wide range of open-source tools for analytics, automation, storage, and CI/CD 🔐 Security, Hardening & Optimization SSL/TLS (Let’s Encrypt + auto-renew) Secure reverse proxy configurations API key management & environment security Cloudflare WAF & zero-trust optimization Secure Docker environments for production infrastructure 📤 CI/CD, Automation & GitOps Git & GitHub Actions Automated build, test & deployment pipelines Version management, rollout, and rollback strategies End-to-end deployment automation 💡 What I Can Do For You ✔️ Deploy your custom or open-source app on any cloud or VPS ✔️ Build secure, scalable Docker-based infrastructure ✔️ Configure Traefik/Caddy, SSL, domains & routing ✔️ Harden your servers for maximum uptime & security ✔️ Set up monitoring, health checks & automatic updates ✔️ Optimize hosting costs while giving you full control 🚀 Why Work With Me? Strong DevOps & backend engineering background Security-first approach for all deployments Reliable communication & fast delivery Hands-on experience managing real production workloads Scalable and maintainable infrastructure design 💬 Let’s Work Together Whether you're launching a new SaaS, migrating infrastructure, or deploying self-hosted tools, I’ll help you build a secure, stable, and cost-efficient production environment from end to end. Send me a message — I’d be happy to discuss your project!