Sher K.

I architect, secure, and optimize production cloud infrastructure for businesses that can't afford downtime. With 20+ years managing enterprise Linux systems and AWS environments, I deliver reliability, security, and cost optimization, not just technical fixes. What I deliver: ☁️ Cloud Infrastructure - AWS architecture design (EC2, RDS, VPC, S3, Route53) - Cloud migration with zero downtime - Auto-scaling and high-availability setups - Cost optimization (20-40% savings guaranteed) 🔒 Security & Compliance - Zero-trust architecture implementation - Intrusion detection and incident response - CIS benchmarks, SOC2, HIPAA compliance - SSL/TLS, PKI, and certificate management 🐧 Linux Systems - Ubuntu, Debian, RHEL, AlmaLinux production environments - Performance tuning for high-traffic applications - Disaster recovery and business continuity - Automation with Ansible and custom scripts 📧 Email Infrastructure (Specialized) - Postfix, Dovecot, Exim architecture - SPF, DKIM, DMARC for 100% deliverability - Migration from legacy systems with zero data loss Why clients hire me: ✅ 20+ years hands-on production experience ✅ Master's degree in Cybernetics (Computer Sciences) ✅ Microsoft Certified Professional ✅ 100% Job Success Score ✅ I fix problems permanently, no band-aids How I work: 1. Deep root-cause analysis 2. Clear, jargon-free communication 3. Production-safe changes with minimal disruption 4. Complete documentation of every change Recent wins: - Recovered hacked production servers for a fintech company restored operations within 2 hours - Migrated 500+ user email system to AWS with 40% cost reduction - Architected HIPAA-compliant infrastructure for a healthcare startup Send me your infrastructure challenge. I'll diagnose it and give you a solution plan before you commit to anything.