Vasili Pascal is CTO and Partner at Optimum Web. Since co-founding the company in 1999, he has served as the lead architect on hundreds of production systems — from single-server Linux setups to multi-region cloud deployments. He specialises in Docker, Kubernetes, CI/CD pipelines, Linux hardening, and high-performance infrastructure. Every article Vasili writes comes from war stories: real production outages diagnosed, real systems optimised, real security incidents resolved. He has personally touched the infrastructure behind projects in fintech, logistics, healthcare, and e-commerce.
Based in Chisinau, Moldova
Articles published
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Your server is slow — here's exactly what to run. 60-second diagnosis checklist with 12 Linux commands, decision flowchart, real case study, and when to call for expert help.
Docker failures in production cost businesses thousands per hour. Learn who needs professional Docker troubleshooting, when to call experts, and how fixed-price resolution services protect your revenue and team productivity.
Docker has revolutionized application deployment, but it creates a new layer of complexity for debugging. Even stable systems fail occasionally when containers restart, network connections drop, or logs fill up storage. Here is how to quickly diagnose failures and get your production environment back on track.
Server security cannot be treated as a one-time deployment task. As threat landscapes evolve with increasingly sophisticated automated attacks, supply chain vulnerabilities, and zero-day exploits, organizations must adopt a proactive, defense-in-depth security posture.
Cyber threats are growing more complex in 2025. How can businesses protect data and systems without compromising ethics and privacy? The answer lies in ethical cybersecurity.
The world is entering a new era in IT infrastructure. In 2025, companies plan to spend $580 billion on building and upgrading data centers — even more than what will be spent on oil exploration.
Energy plays a key role in the development of information technology and the economy of a country. Without reliable and efficient energy supply, IT infrastructure cannot function properly — and this affects productivity and the ability of companies to innovate.
Companies follow strict security rules to protect their data, follow laws, and prevent cyberattacks. Here's what makes a strong security policy, how businesses keep their data safe, and what happens when things go wrong.
Here's an overview of some of the best Python frameworks for web development, along with examples of their use cases — from Django's batteries-included approach to FastAPI's modern async performance.
As businesses scale and technologies evolve, many organizations find themselves dealing with legacy systems that are difficult to maintain. Refactoring old applications to modern languages such as Go and Rust has become a popular and proven solution.
Iterators in Rust are objects that implement the Iterator trait and allow you to iterate over collections of values. Learn what iterators are and explore several practical ways to iterate over a vector in Rust.
A European e-commerce site had 5-second database lag during peak hours, causing 68% cart abandonment. Optimum Web's senior Linux engineer resolved root cause (MySQL misconfiguration + missing indexes + wrong I/O scheduler) in 2 business days for $149. Result: 98% faster database, cart abandonment dropped from 68% to 47%.
A production e-commerce app went down when a Docker container entered a crash loop — restarting every 3 minutes due to OOM kills. Client team unable to identify cause for 4 hours. Optimum Web engineer connected via SSH, identified root cause (Node.js memory leak — unbounded event listener array) and fixed it in 47 minutes for $99. Zero OOM events in 5 months since.
A SaaS company in the Netherlands was paying $3,500/month on AWS for an app serving 2,000 daily users. Optimum Web migrated the entire stack to a Hetzner dedicated server ($89/month) with zero downtime in 3 business days for $299. Performance was identical (TTFB 180ms → 165ms). Annual savings: $40,920.
