Istvan P.

I'm a systems engineer with 20+ years of hands-on experience designing, managing, troubleshooting, and optimizing Linux-based infrastructure — from standard setups to fully customized and performance-critical environments. I began my career at a national ISP (2006–2018), where I gained deep expertise in networking, routing, backend service infrastructure, monitoring, and automation. Since 2018, I've been running my own consultancy, supporting clients worldwide with a strong focus on performance, security, and reliability. Core strengths and services: • Hosting infrastructure (WHM/cPanel, Apache/Nginx, PHP-FPM tuning) • MySQL and Percona database stack: advanced tuning, PMM monitoring, backup/restore automation • Custom Linux server deployments, far beyond common templates • Bash and Perl scripting – powerful, production-grade automation • Cloud infrastructure: AWS (Lightsail, S3 buckets, SES, Route53, multi-zone sync, load balancing, RDS/DB services, security groups), DigitalOcean, Linode • Docker and container-based deployments in production environments • Server hardening, traffic spike mitigation, advanced tuning • Deep email infrastructure expertise: Postfix, Dovecot, Sieve, SPF/DKIM/DMARC, DNS, deliverability, and full mail transport troubleshooting • Recovery from overload, attacks, or broken systems • Firewalls, routing, and network engineering • VoIP infrastructure and PBX systems: Asterisk, FreePBX, embedded VoIP phones, and switched telephony interconnection I don’t just install and configure — I engineer infrastructure to fit business-critical needs, keeping in mind long-term stability, security, and maintainability. Whether you're scaling up, migrating legacy architecture, or recovering from a failure, I bring clarity, confidence, and control. Comfortable in team environments using Jira, Cerberus, Slack, Basecamp, and others. I value clear communication and reliability as much as technical excellence. With a BSc in Electrical Engineering, I bring a structured, analytical mindset to complex systems. My clients appreciate my calm under pressure, ability to own the problem, and deliver stable, working solutions. If you're looking for a senior engineer who can take ownership, fix, or optimize infrastructure at any scale — I'm available and ready to assist.