Terminal command line interface with Linux system code
Senior Production Troubleshooter

vedran jakovac

AWS / LINUX TROUBLESHOOTING
AI-ERA PRODUCTION SECURITY

Most clients come to me when production is already in trouble: AWS/Linux is misconfigured, servers are slow, Cloudflare is not stopping bad traffic, APIs are being abused, bots are scraping or attacking ecommerce flows, or a migration needs to happen without breaking the business.

Top
Rated Plus
100%
Job Success
278
Upwork jobs
GET IN TOUCH VIEW SERVICES
What I Do

CORE EXPERTISE

I diagnose and stabilize the full production chain: AWS, Linux, NGINX, Docker, databases, DNS, SSL, Cloudflare, uptime, performance, security, abusive traffic, and AI-assisted automation pressure.

AWS/Linux Production

TROUBLESHOOTING

Slow, unstable, overloaded, or misconfigured production systems. I inspect AWS, Linux, NGINX, DNS, SSL, databases, logs, and traffic together before changing live infrastructure.

EC2 Linux NGINX DNS/SSL MySQL
Cloud Architecture

AWS DEVOPS

Architecture reviews, migrations, cost/performance review, VPN connectivity, load balancing, and Docker/ECS/EKS deployment support for production AWS environments.

EC2 VPC ECS RDS CloudFront Cost Optimization
AI-Era Security

BOTS & ABUSE

Protection for AWS/Linux, Cloudflare, APIs, ecommerce, and SaaS systems facing automated abuse, bots, scraping, fake signups, login abuse, API abuse, carding, and AI-assisted attacks.

Cloudflare Bots API Abuse Scraping Login Abuse
Web Servers

NGINX & ORIGIN

High-performance web server configuration, load balancing, SSL termination, reverse proxy setups, PHP-FPM tuning, and origin protection for high-traffic sites.

Nginx HAProxy Apache SSL/TLS PHP-FPM
DevOps

DOCKER & MIGRATIONS

Containerization, deployment cleanup, staging-to-production coordination, fragile migration recovery, and infrastructure handoffs where app, server, and cloud behavior overlap.

Docker ECS/EKS CI/CD Terraform Ansible
Ecommerce & SaaS

HIGH-TRAFFIC APPS

WordPress, WooCommerce, Magento/OpenMage, Shopify, and SaaS infrastructure work where performance, abusive traffic, caching, and production safety all matter.

WordPress Magento Shopify MySQL Redis
11.7K+
Upwork hours
Top
Rated Plus
0-4h
Avg response
$99
Hourly rate
Services

ENGAGEMENT OPTIONS

Focused infrastructure and AI-era security help for teams that need senior judgment under uncertainty, not another tool dashboard or generic checklist.

01
Problem State

PRODUCTION TROUBLESHOOTING

For slow, down, overloaded, unstable, or misconfigured AWS/Linux production systems.

  • AWS, Linux, NGINX, DNS, SSL inspection
  • PHP/MySQL, Docker, worker, and resource review
  • Risk-aware fixes for live systems
  • Clear explanation of cause and next steps
  • Stabilization, monitoring, and handoff

AWS/Linux troubleshooting details →

02
Most Common

AI-ERA ABUSE DEFENSE

For sites where Cloudflare is enabled but automated abuse, bots, scraping, fake signups, API abuse, exposed origins, or broken rules still hurt production.

  • WAF rules, rate limiting, Workers, Zero Trust
  • Bots, scraping, fake signups, carding, API abuse
  • Shopify login, cart, and checkout protection
  • Origin lock-down and DNS/proxy review
  • AI-assisted attack and good-bot rule design

Cloudflare hardening details →

03
Ecommerce Abuse

SHOPIFY BOT PROTECTION

For stores dealing with login, cart, checkout, scraping, carding, or fake traffic behavior.

  • Shopify login, cart, and checkout review
  • Cloudflare WAF and rate limit tuning
  • Scraping, carding, and fake traffic control
  • Good-bot, SEO, and app-safe rules
  • Production-safe deployment and rollback

Shopify bot protection details →

Proof

WHAT THE WORK LOOKS LIKE

The pattern is consistent: clients bring me in when the problem crosses infrastructure layers and needs a senior operator who can inspect, explain, fix, and stabilize.

AWS
Cloud Infrastructure

Architecture reviews, EC2/VPC/RDS/CloudFront work, urgent setup help, VPN connectivity, Docker/ECS/EKS troubleshooting, and cost/performance reviews.

Linux
Server Operations

Long-running work across NGINX, Apache, PHP-FPM, MySQL/Percona, Varnish, HAProxy, Plesk, cPanel/WHM, SSL, DNS, monitoring, and patching.

Edge
Cloudflare Security

Cloudflare audits, WAF hardening, DDoS mitigation, bot protection, Zero Trust tunnels, Shopify abuse defense, API abuse control, and origin hardening.

Client Reviews

WHAT CLIENTS SAY

Verified 5-star reviews from Upwork clients.

★★★★★

When working with Vedran it was immediately apparent that he knew his stuff inside and out! We will very likely hook him in the future. 100% recommend.

Verified Upwork Client
★★★★★

Vedran was fantastic to work with and is a talented developer. He helped us get a site up at a critical time after a security issue. Highly recommend.

Verified Upwork Client
★★★★★

Quickly helped us defend against DDoS attack and resolved new attacks very quickly. If we ever need help again, I know where to find the guy who can protect us!

Verified Upwork Client
★★★★★

Great to work with, excellent skills and turnaround time. Solved our issues.

Verified Upwork Client

View all reviews on Upwork →

Technologies

TOOLS & PLATFORMS

Linux Ubuntu CentOS RHEL Debian AWS EC2 VPC CloudFront RDS ECS/EKS Cloudflare WAF Workers Zero Trust Nginx HAProxy Apache Docker Kubernetes Terraform Ansible CI/CD MySQL PostgreSQL Redis WordPress WooCommerce Magento OpenMage Shopify Git Bash Python Fastly DigitalOcean
How I Work

ENGAGEMENT PROCESS

01

INSPECT

Access, logs, DNS, AWS layout, server config, app behavior, traffic, and recent changes.

02

ISOLATE

Find whether the failure is cloud, Linux, NGINX, database, DNS, Cloudflare, app, or traffic.

03

STABILIZE

Apply careful live fixes, reduce immediate risk, protect revenue paths, and watch the result.

04

HARDEN

Close origin exposure, tune rules, improve monitoring, document what changed, and plan next steps.

FAQ

COMMON QUESTIONS

CAN YOU HELP RIGHT NOW?
Yes. Send the symptoms, affected URLs or services, recent changes, and what access is available. I can triage active incidents, slow systems, failed migrations, and Cloudflare/security problems once access is granted.
WHAT ACCESS DO YOU NEED?
Usually temporary access to the relevant AWS account, server, Cloudflare zone, DNS provider, logs, monitoring, and a technical contact for context. I can start with read-only access where that is safer.
IS THIS ONLY CLOUDFLARE WORK?
No. Cloudflare security is a major specialization, but many problems require checking the origin, AWS layout, Linux server, NGINX/PHP/MySQL behavior, DNS, SSL, and application paths together.
WHAT PLATFORMS DO YOU WORK WITH?
AWS/Linux production stacks, Cloudflare, NGINX, Apache, Docker, RDS/MySQL, WordPress, WooCommerce, Magento/OpenMage, Shopify, SaaS platforms, cPanel/WHM, Plesk, and high-traffic custom applications.
WHEN SHOULD I BRING YOU IN?
When production is slow, unstable, under attack, hard to explain, expensive, risky to migrate, or blocked by conflicting diagnoses from hosts, developers, security tools, or infrastructure providers.
DO YOU SIGN NDAS?
Yes. I sign NDA/DPA agreements. I only ask for the access needed to inspect and fix the problem, and I can work within your team's access and change-control process.
About

VEDRAN JAKOVAC

I'm a hands-on infrastructure engineer focused on AWS/Linux production troubleshooting, Cloudflare security, AI-era automated abuse, migrations, performance, and traffic pressure. Clients usually bring me in when the issue is already affecting uptime, speed, cost, checkout, DNS, SSL, or security.

My specialty is full-chain diagnosis: AWS, Linux, NGINX, Docker, databases, DNS, Cloudflare, origin exposure, application behavior, and traffic patterns all need to be understood before production can be fixed safely.

Top Rated Plus on Upwork with 100% Job Success, 278 jobs, and 11,700+ hours. Based in Croatia (CET/CEST timezone), available globally for remote engagements.

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Let's Talk

GET IN TOUCH

Share what is broken, slow, risky, under attack, or unclear. Include URLs, symptoms, platform details, recent changes, and what access you can provide.

Response: Usually within 0-4 hours on Upwork
Timezone: CET/CEST (Central European)
Availability: Remote, global engagements
NDA: Available on request