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- Cyber Security & Penetration Testing: Vulnerability assessment, security auditing, and proactive defense strategies. - Incident Response & Digital Forensics: Post-attack reconstruction, root cause analysis (RCA), and secure system recovery after a breach. - Website Security & Hardening: DDoS & Brute force protection, Cloudflare, Sucuri, WAF, Imunify360. - Operating Systems (OS) Administration: Expert in Linux distributions: Ubuntu, CloudLinux, AlmaLinux, Rocky Linux, RHEL, and Debian. - Web Server Management: Advanced configuration and tuning of NGINX, Apache, and LiteSpeed - Website Performance & Speed Optimization: Specialist in Google PageSpeed Insights and GTmetrix (Mobile & Desktop tuning). - Digital Tracking & Analytics: Expert setup of Google Tag Manager (GTM) and Google Analytics 4 (GA4), including custom event tracking and conversion setup for E-commerce. - Hosting & Domain Administration: Migration, WHM/cPanel, StackCP, Webmin, Virtualmin, Cyberpanel. - WordPress & WooCommerce: Website development (Elementor, Divi), maintenance, debugging, and malware removal. - Object Caching & Database Optimization: Redis, Memcached, MySQL/MariaDB optimization. - VPS & Dedicated Servers Configuration: AWS, Google Cloud, Digital Ocean, Hetzner, Contabo, Vultr, etc. - DNS & Email Deliverability: Professional DNS management (SPF, DKIM, DMARC), Cloudflare Email Routing. - Bulk Email Systems: Amazon SES, Mailgun, SendGrid, Postmark, Mautic, Sendy. - Hosting Automation: WHMCS & Upmind (specializing in WHMCS to Upmind migrations). - Content Protection: DMCA protection and SSL management. - Service Excellence: 100% accuracy, fast response, and adjustable to all time zones. Other: Graphic Design: flyer, brochure, magazine, catalog, presentation, logo, font vectorization, preparing Files and Documents for Print (crop mark, trim line, bleed area, RGB to CMYK conversion, PMS Solid colors Pantone), Variable Data, Excel XML, minimalist design, wood engraving mockup, DST embroidery file conversion, Recover Corrupted videos, ads marketing Photo Editing: manipulation, retouching, mockup, product photo editing, removal of background (hair, fur) Video & Audio Editing: crop, noise reduction, warp stabilizer, montage, transitions, effects My Resume: -Disciplined, hard-working, responsible -Used to having high responsibilities and constant improvement -Good at adjusting to the team I'm in -Extremely detailed, efficient, and quality work Education: - Electrical Engineering University of Niš, Serbia Certificates: - TryHackMe – Cyber Security - Cisco CCNA (Network Associate Routing & Switching) - Cisco End User: Network Security - Ultimate AWS Certified Cloud Practitioner - Proxmox VE 6 - Visual and Graphic Design - Adobe Photoshop, Illustrator, InDesign, Premiere, After Effects

⚡️⚡️⚡️TOP rated IT Specialist⚡️⚡️⚡️ Need quick IT support or a reliable expert for long-term projects? Extensive background in system administration, server and network architecture, security, endpoint protection, and data center operations. Proven problem-solving skills and decisiveness enable effective direction and resolution of complex technical issues on a global scale, even under strict time constraints and budgetary limits. Assistance with securing IT environments (NIST, GDPR, NIS2, ISO 27001) or implementing infrastructure. Here are some feedback: - Excellent work. Very flexible and knowledgeable. - So strong skill and very quick to help me with my vpn setting on windows server with AD integration. Will work with him again and again. - Dejan's understanding of Windows Server Administration and AWS is amazing.. - Dejan, your knack for untangling Windows Group Policy and Domain issues saved our project. Top-notch work! - Executed quickly, highly responsive. Great experience and a true professional. - Windows server security - Very impressed with Dejan's work. Will hire him again. - Dejan was great expert and help us a lot. He gave us a whole picture and advice what to do next. Thank him a lot ! - Dejan was very responsive and supportive! He was willing to take up topics of research that were new/ unfamiliar and troubleshoot issues. I would definitely recommend him! - Very knowledgeable with VMWare, helped me get my server back online and added additional protections to prevent any further complications. Not to mention he was able to help with my situation right away! Will be hiring again with anything related to VMware. - Dejan made a great and fast troubleshoot for our Windows Server 2012 R2. He has a lot of knowledge and experience. Our problem was solved under 30 minutes.

PageSpeed & Core Web Vitals Specialist 1,000+ Sites Optimized. When other developers have tried and failed, clients come to me. Staging environment first → live deployment after testing → 28 days of Search Console monitoring I am a web performance engineer with 15+ years of experience and 1,000+ optimized sites. I specialize in Core Web Vitals (INP, LCP, CLS) and speed optimization for WordPress, WooCommerce, and Shopify—handled at the code and server level, not the plugin level. - I Fix What Others Broke (The "Fake Score" Problem): Did a previous developer install WP Rocket or NitroPack, break your layout, and call it done? Or worse, use obfuscated cheat scripts to fake a 90+ Lighthouse score while your real users still experience 6-second load times? I strip out the fake speed hacks, remove plugin bloat, and deliver real, sustainable CWV improvements based on Chrome User Experience (CrUX) field data. I don't guess. I diagnose the actual bottleneck and fix it permanently. - Speed is Conversion Rate Optimization (CRO): A 1-second delay drops conversions by up to 7%. I optimize for real user behavior, not vanity metrics: - Sluggish INP equals frustrated users and abandoned carts. - Slow LCP spikes your bounce rate and penalizes your Ads Quality Score (driving up CPC). - High CLS makes your site feel broken and untrustworthy. - My Process: 1. Diagnose: Deep code/server audit + Real User Monitoring (RUM). 2. Fix Safely: All work happens on a staging environment. Live deployment occurs only after rigorous QA. 3. Validate: 28 days of Search Console monitoring to confirm Google validates the fix using real-world field data. - Tiered Offerings: (Pricing is fixed per project based on site complexity. All tiers include staging-only work and 28-day validation.) Tier 1: Performance Audit & CRO Roadmap ($300–$450) - Full technical audit + Core Web Vitals breakdown. - Real-user bottleneck analysis (RUM/CrUX). - Prioritized fix list with expected impact on speed & conversions. Tier 2: Full CWV & Conversion Fix ($500–$1,200) - Complete staging implementation of all fixes. - Server, theme, and code-level optimization (no bloat plugins). - CRO-focused tweaks: checkout flow responsiveness, ad/script deferral, critical rendering path optimization. - 28-day post-launch Google validation guarantee. Tier 3: Ongoing Performance Retainer ($500–$1,500/mo) - Real-time CWV & conversion tracking. - Monthly performance patches + plugin/theme update testing. - Proactive bottleneck prevention. - Ideal for WooCommerce/Shopify stores running ads or scaling traffic. Specializations: WordPress & WooCommerce · Shopify (Liquid, JS reduction) · Core Web Vitals (INP, LCP, CLS, TTFB) · Advanced server tuning (Linux, Nginx, LiteSpeed, VPS) · Cloudflare · Conversion Rate Optimization (CRO) · Technical SEO Keywords: WordPress Speed Optimization · Shopify Speed Optimization · Core Web Vitals · PageSpeed Insights · Site Audit · WP Rocket · Perfmatters · Performance Fix · CRO · Conversion Optimization · Technical SEO · WooCommerce Checkout Optimization · Site Maintenance

Dear clients, I bring over 5 years of rich experience in web development, with a strong focus on backend programming, particularly in Laravel. My knowledge extends to frontend development and web design, making me a versatile professional in the field. I am not just a developer; I am a responsible, honest, and reliable individual who thrives in collaborative team environments. Having successfully worked with teams of developers, I am well-acquainted with the dynamics of collaborative projects. I excel in debugging website issues, creating modern sites from scratch, redesigning existing websites, and crafting various web elements, including landing pages, blogs, modern animations, and classic multi-page websites. My expertise extends to building and maintaining custom CMS solutions, encompassing both frontend and backend functionality. I specialize in developing e-commerce systems, online shops, and various small projects. My proficiency extends to both Windows and Linux environments, and I frequently configure them to meet the specific needs of each project. Web Server Configuration Expertise: - Apache HTTP Server: - Proficient in setting up and configuring Apache servers for hosting web applications. Experienced in optimizing server performance and security. - Skilled in the implementation of mod_rewrite for URL rewriting and redirection. - Familiar with configuring virtual hosts to accommodate multiple websites on a single server. - Expertise in SSL/TLS configuration for secure communication, including the installation and management of certificates. - Nginx: - Skilled in the setup and configuration of Nginx web servers for fast and efficient content delivery. Expertise in configuring SSL/TLS certificates for secure communication. - Experienced in using Nginx as a reverse proxy for load balancing and improved server performance. - Proficient in fine-tuning Nginx configurations to maximize efficiency for high-traffic websites. In addition to my technical skills, I am committed to delivering solutions with a keen eye for detail. I pride myself on my ability to adapt to diverse project requirements, and I am always eager to take on new challenges. Let's collaborate to bring your vision to life!

Hello! I'm Bogdan, a DevOps | Cloud Engineer also open to diverse freelance opportunities. Experienced in AWS, Terraform, Docker, Kubernetes and CI/CD pipelines. Skilled in infrastructure automation, container orchestration, and monitoring solutions. Passionate about improving deployment workflows and ensuring secure, scalable environments. Alongside my DevOps experience, I have more than 2 years as a Network Administrator, expanding my knowledge in network architecture and security. Here is list of my skills: Cloud Platforms: AWS (VPC, EC2, EKS, Lambda, S3, IAM, CloudWatch, SNS) Infrastructure as Code: Terraform, Ansible Containerization & Orchestration: Docker, Kubernetes, Helm CI/CD & GitOps: GitLab CI, Jenkins, ArgoCD Version Control: Git Operating Systems: Linux, Windows Monitoring & Observability: Grafana, CloudWatch Security & Compliance: Checkov, ScoutSuite Scripting & Automation: Bash Let's connect and discuss how I can help streamline your operations and accelerate your project's success.

If your website is critical to your business, security and stability aren’t optional - they’re infrastructure. I work with companies that rely on WordPress and WooCommerce in production environments, where downtime, attacks, or misconfigurations directly impact revenue. With over 10 years of experience in WordPress, Cloudflare, and Linux server environments, I typically get involved in situations where things need to be handled properly - not patched temporarily. What I focus on: • Advanced malware remediation and full-site recovery • Cloudflare architecture, WAF tuning, and traffic control • Bot mitigation and DDoS protection at scale • Linux server hardening and performance tuning (Nginx, Apache, MySQL) • Stabilizing high-traffic WooCommerce environments • Full-stack performance + security alignment I approach every project from both sides - application and infrastructure. That means understanding how WordPress behaves under load, how traffic is filtered at the edge (Cloudflare), and how the server handles what gets through. This is where most setups fail, and where I usually step in. I’m a Top Rated Plus freelancer on Upwork with a 100% Job Success score, and I’ve worked with 150+ clients across hundreds of production websites, many of them long-term. I don’t rely on generic solutions or one-size-fits-all setups. Every system is different, and I take the time to understand what’s actually happening before making changes. If you’re looking for someone who can take ownership of security and stability, not just fix isolated issues - we’ll likely be a good fit. ✔ Fast response (usually within a few hours) ✔ Available for urgent fixes (including hacked or down sites) ✔ Careful work on live environments (no unnecessary downtime) ✔ Root-cause fixes, not temporary patches