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Hello, I am a Security Professional and Red Team member with strong hands-on experience in penetration testing, vulnerability management, and web infrastructure security, focused on real-world attack scenarios and business impact. I have worked performing penetration tests across company assets, vulnerability analysis, and security assessments, always with an attacker mindset and a consultant-level reporting approach. In addition, I bring 10 years of experience in hosting environments, working directly with Linux servers and web infrastructure, with a strong emphasis on web security and incident response, including: Malware identification and removal (site cleanup) Investigation of compromised websites to determine how the attack occurred Identification of weaknesses in web systems and hosting configurations Hardening of servers, CMS platforms, and applications Solving complex issues related to shared, VPS, and dedicated hosting environments I am also a WordPress security expert, with extensive experience securing, cleaning, and hardening WordPress websites after real-world attacks, not just theoretical vulnerabilities. My technical experience includes: Web Application Pentesting (OWASP Top 10, auth flaws, file upload issues, RCE, LFI/RFI, SQLi, XSS) Active Directory and internal security assessments Red Team operations and attack simulation Linux servers, hosting infrastructure, and web stacks Clear technical and executive reporting with actionable remediation steps What you can expect from me: Practical, real-world security approach Clear communication and transparency Evidence-based findings (PoCs when applicable) Actionable recommendations, not generic advice If you are looking for someone who understands how attackers think, how websites actually get hacked, and how to fix and prevent it, I would be glad to discuss your project. Best regards, Andre Olivato Red Team | Pentest | Web & Infrastructure Security

Senior Full-Stack Architect/Engineer specialist in building scalable SaaS platforms using Node.js, React, Golang and cloud infrastructure and or microserces. I am a constantly updated programmer with 30 years of experience in software development and over 15 years as a software/solutions architect. I can develop/solve applications in 99% of areas or niches. How I can help you: • SaaS platform development • Microserces platform development • Scalable platform development • API development • API Integrations • Event Oriented Architecture • Scalable backend architecture • REST APIs and microservices • Cloud infrastructure and DevOps • System modernization and performance optimization • MVP development for startups • Enterprise-level system architecture • Figma → Software • Systems Web • Ecommerce • Landing Pages • Website • PWA • Mobile Aplication ( Android, IOS) • Server Configuration • Software Achitecture • Cloud Architecture • TDD • DDD • Clean Architecture Technologies Backend: Node.js, NestJS, TypeScript, Java, GoLang Frontend: React, Next.js, HTMX, Html, CSS Mern Stack, Infrastructure: Docker, Nginx, Certbot, PM2, Kubernetes, CI/CD, AWS - Amazon Web Services, Google Cloud, Microsoft Azure, Digital Ocean, Hetzner, Linux Automation: DevOps, Ansible , Terraform, Prometheus, Grafana , traefik Architecture: Microservices, Event-Driven Architecture, DDD, High Availability Systems, Distributed Systems I am a native Brazilian Portuguese speaker. I can handle technical communication in English, including reviewing and translating audio and video materials with the support of AI tools, so feel free to send them if helpful. I also understand Spanish very well. Portuguese is my preferred language for meetings. Experience I have worked on large-scale systems, including banking platforms, enterprise systems, streaming platforms, large e-commerce sites, and SaaS products used by thousands of users. I also have experience designing high-availability systems from scratch to deployment, building microservices architectures, and helping companies scale their infrastructure. Technical career leader. I already have led multiple teams on simultaneous projects. And in a large consulting and outsourcing company I led 3000 programmers in different teams for clients in the banking sector. If you are creating a startup, a SaaS platform, or an enterprise system, I can help you design the architecture and implement the solution. If you want to be sure your candidate is the right one and technically suitable for your project, I also conduct technical interviews to evaluate software engineers. I help companies quickly validate candidates and determine if they are the right fit for the role in a structured 30-minute technical conversation. I can tell you which of your candidates is the best for your project. I also help refine your project description. Let's talk about your project.

Over 7 years of dedicated experience as a Linux administrator. Proficient in working on projects and expertly troubleshooting/managing various aspects, including: Linux distributions: Debian, Ubuntu, CentOS, AlmaLinux. Virtualization technologies: VMware, Proxmox, Xenserver, KVM/Libvirt. Hosting environments: WHM/cPanel. Cloud services: AWS EC2, RDS, S3, and Route 53. Network services expertise includes: DNS management: Record configuration, zone transfers, security enhancements (SPF, DKIM, DMARK) to ensure mail servers send/receive mail without triggering spam filters. VPN setup: Efficiently establish, manage, and troubleshoot OpenVPN and IPsec configurations. Mail server setup: Proficient in configuring Exim or Postfix, Dovecot, and MX records. Linux services mastery: Skilled in managing BIND9, Exim4, Postfix, Dovecot, OpenVPN, Squid, Apache2, Nginx, and Samba4. Proficient in deploying iptables and various packages for effective firewalling. Scripting capabilities: Adept with both Bash and Python scripting languages. Network troubleshooting: Skilled in using tools like Wireshark, TCPdump, and others for accurate diagnosis. Firewalls proficiency: Expertise with SonicWall, Sophos, FortiGate, NethServer, PfSense, and MikroTik. SSL certificates management: Able to generate certificates using Let's Encrypt and effectively manage them with Certbot. SSH hardening: Proficient in generating public/private keys for SSH and fine-tuning configurations. Users/groups management: Skilled in efficiently managing user accounts, groups, and permissions. Linux clusters: Competent in setting up and managing Linux clusters. Storage management: Experienced in managing storage with LVM technology.

*I operate exclusively as a freelancer. I.e. I'm not interested in full or part-time positions. That being said, I do have arrangements with marketing agencies in which they deliver me clients and I manage the accounts. *My fee: -For ad budgets below US$5.6k/m: US$560/m (negotiable if you're an agency delivering me multiple clients). -For ad budgets above US$5.6k/m: 10% over ad spend (negotiable for very high ad budgets). Design is included, both images and videos (I work with a designer). Over a decade of experience working with trilingual (English, Portuguese and Spanish) paid digital advertising and social media management for international companies (USA, Europe, Canada, South Korea, China, Brazil, among others), heading teams of media buyers, managing budgets of over US$100k/month and accounts with over US$2 million in ad spend, with 250+ clients distributed in an ample variety of industries (e-commerce, finance, gaming, SaaS, B2B, etc.). Portfolio: Since UpWork doesn't allow links in the profile, please check out my profile portfolio. -Paid digital advertising: creating, launching, optimizing and providing periodic reports for campaigns run on Facebook/Instagram/Meta Ads (budgets: US$100k+/month, largest account: over US$2 million), Google Ads (Search, Display, Youtube), TikTok Ads, as well as analyzing data with Google Analytics and AdEspresso. I’m also familiar with LinkedIn and Twitter Ads. Sectors I've run ads for: e-commerce (over 150 clients, including, but not restricted to: electronics, gadgets, fashion, cosmetics, home decoration, jewelry, etc.), US insurance market (annuities and IULs, over 100 clients), SaaS, B2B, services and online games. -Email marketing and CRM: GoHighLevel, ActiveCampaign and MailChimp. -E-commerce: Shopify, WooCommerce and Wix. -Website and server management: intermediate knowledge of SEO, Wordpress, cPanel and WHM. -Project management: Asana, Trello and Wrike. -Social media management: Hootsuite and Buffer. -CRM/other tools: Intercom, Zendesk, Slack. -Design: responsible for creative direction when working under agencies. I work with my own designer as a consultant. -Training and supervising a team of media buyers. -Fluent English and Portuguese. Business level Spanish. -Bachelor's degree in biology (molecular specialization). 2+ years of work experience in genetics and biotechnology, giving me a solid knowledge of statistics and data analysis.

Hello, I'm Lucas Peçanha, holding a Bachelor's degree in Computer Science. As a programmer and IT technician, I specialize in WordPress Website Development and Linux System Administration, focusing on Cloud Solutions and Web Hosting. With a strong background in these areas, I bring expertise to ensure your online presence is efficient and secure. My skills extend beyond WordPress as I also provide technical support for various systems, including ERPs, CMS, Mautic, and other scripts commonly found online. I'm dedicated to delivering comprehensive solutions to meet your business needs. In addition to my hands-on experience, I run the YouTube channel "GeekLinux," where I share in-depth tutorials on various free web hosting panels such as CWP (Control Web Panel), CyberPanel, Plesk, cPanel/WHM, among others. I'm not only a content creator but a reliable source of specialized support for these software solutions. I'm actively seeking new opportunities because, as a new parent, financial stability is crucial. Your project is an opportunity for me to excel while providing for my growing family. Let's collaborate and achieve your goals together.

WordPress expert with 10+ years of experience and 150+ sites delivered across clinics, schools, hotels, medical practices, e-commerce, and law firms. * End-to-end delivery: discovery, wireframe/prototype, build, QA, launch, ongoing care * Hosting and migrations: cPanel, CyberPanel, Plesk, DNS/CDN (Cloudflare), SSL, zero-downtime transfers * Performance and Core Web Vitals: caching, image and database optimization, LiteSpeed/NGINX tuning * Security and recovery: malware cleanup, hacked-site rescue, hardening, WAF, blacklist removal * Plugins and integrations: installation, configuration, and custom plugin development (payments, CRMs, automations, APIs) * WooCommerce expertise: catalogs, checkout, gateways, subscriptions, tax setups * Maintenance and reliability: controlled updates (core/theme/plugins), staging, automated backups, uptime monitoring, bug fixing * Results mindset: 70,000+ leads driven via ads; sites built to convert, not just look good * Clear process and communication: transparent scope, documented changes, fast turnaround Tell me your goal and timeline—I’ll propose the safest, fastest plan to launch or fix your WordPress site.