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I'm Erick, a Software Engineer and System Administrator specializing in self-hosted solutions. I deploy and manage secure server environments to help businesses operate independently from third-party SaaS platforms. My expertise includes Linux server administration, Docker containerization, virtualization with Proxmox, and VPN configuration using WireGuard, Tailscale and OpenVPN. I set up, troubleshoot, and optimize self-hosted services, ensuring efficient and reliable infrastructures tailored to your needs. I also provide Twilio services to help businesses efficiently reach out to customers.

I am a Linux system administrator with 6+ years of experience specializing in captive portal systems (Coovachilli) on WiFi Guest Networks , particularly using FreeRADIUS for managing user access on wireless and wired networks for major Vendors such as TPLink, Unifi Ubiquity, and OpenWRT. I build robust, scalable solutions for bandwidth management, data caps, and session control. Am a certified FullStack Developer with Backend Specialization. My technical stack includes: 🔧 FreeRADIUS, CoovaChilli,OpenWisp, DD-WRT/OpenWRT/Omada Controller/ Unifi Cloud Controller Captive Portal Setup Specialist 📡 TPLink Omada Controller - Advanced Data Backup and Restoration 🐘 PHP — Backend APIs, portals, and admin dashboards 🐍 Python — Enterprise applications and automation scripts 💾 MySQL/MariaDB, PostgreSQL 🔐 Security hardening and performance optimization on Ubuntu/Debian servers I hold a Software Development Certification in Backend Full-Stack Development, and I deliver projects that are clean, documented, and production-ready. Why choose me? ✅ Top Rated – Top 10% on Upwork 📈 Proven results and client satisfaction 🤝 Professional, transparent communication 🔍 Deep understanding of backend systems and network access control Let’s collaborate and build something that works — securely and at scale.

My goal is accuracy and efficiency and I strive to exceed your expectations. I am here to create a long-term association with potential Freelance clients from all around the world. I am working as a professional Data Annotation specialist since 2021 . My Skills: 1. Data annotation, Image annotation by using (LabelImg, LabelBox, Roboflow, Labelstudio, CVAT, Image annotation lab,) tools. 2. Data Entry (MS Word, MS Excel, MS PowerPoint, CSV, Google Doc , Spreadsheet) 3. Web research and Data Mining (Google, Facebook, Twitter, LinkedIn, yellow pages ) 4. PDF ( Conversion, Creating Fillable Form, Converting into Excel, Word, CSV ) 5. Admin Support, Technical Assistance, Cisco CCNA

I am a Senior Engineer with strong expertise in AWS, Google Cloud Platform, Linux systems, automation, and network/security engineering. I help businesses design, deploy, secure, and automate scalable infrastructure, on-prem, cloud, and hybrid environments. On the DevOps side, I specialize in: CI/CD pipelines using Jenkins, Git, and cloud-native CI/CD platforms Containerization & orchestration with Docker and Kubernetes Infrastructure as Code (IaC) using Terraform and Ansible Deployment automation for cloud and on-prem environments Linux system administration (Ubuntu & enterprise Linux) Scripting and automation using Python, Bash, and Git On the Cloud & Architecture side, I work extensively with: Amazon Web Services (AWS) – EC2, networking, security, and automation Google Cloud Platform (GCP) – Cloud Run and cloud-native services Cloud architecture design, optimization, and cost-efficient scaling Secure, highly available, and production-ready cloud environments I also bring deep expertise in Networking and Security, including: Firewall deployment & management (FortiGate, Fortinet, Palo Alto, Juniper, Cisco, UniFi) VPN technologies (IPsec, SSL VPN, FortiClient) Routing & switching – BGP, OSPF, ECMP, VRF, VXLAN ISP & enterprise networking – Peering, IP Transit, IXP sites Cisco & Juniper networking environments Network security, firewall policies, and security infrastructure hardening Additional strengths include: Windows Server & Active Directory administration IPv4/IPv6, VLANs, SSL, VoIP fundamentals Troubleshooting complex production issues Technical support and system configuration in enterprise environments I am detail-oriented, automation-driven, and security-focused, with real-world experience supporting mission-critical systems. Whether you need cloud migration, DevOps automation, CI/CD setup, Kubernetes deployments, firewall/VPN configuration, or network optimization, I deliver reliable, scalable, and well-documented solutions.

Overview I solve complex email system problems while ensuring enterprise-level security and compliance. As a Certified Google Workspace Administrator and ISO 27001 Lead Auditor, I provide more than just technical fixes—I deliver secure, compliant solutions aligned with your business objectives. 💼 My Core Technical Expertise ✅ Seamless Email Migration • Google Workspace ↔ Microsoft 365 migrations, including complex Tenant-to-Tenant transfers • Migration from cPanel, Zoho, GoDaddy, Namecheap, and Outlook PST files • Zero data loss approach with minimal business disruption • Specialize in merging and consolidating multiple email environments ✅ Enterprise Email Security & Deliverability • Fix emails landing in spam through precise SPF, DKIM, and DMARC configuration • Conduct cybersecurity assessments to harden your email environment • Implement Multi-Factor Authentication (MFA) and security policies to prevent phishing • ISO 27001 Insight: Apply information security best practices to protect your data ✅ Google Workspace & Microsoft 365 Management • Certified setup and configuration from scratch • User and team training on collaboration tools (Drive, Teams, Outlook) • Admin console management and advanced troubleshooting • Google Vault implementation for data retention and eDiscovery ✅ Domain & DNS Management • Expert configuration of MX, A, CNAME, TXT, SPF, DKIM, and DMARC records • Manage domains across GoDaddy, Namecheap, Cloudflare, and other major registrars • SSL/TLS certificate implementation and CDN optimization 🔧 Professional Tools & Diagnostics MxToolbox, Mail-Tester, Google Postmaster Tools, Microsoft SNDS, DNS analytics, and security assessment tools. Why I'm Your Ideal Partner 🏆 Certified & Compliant: Google Workspace Certified + ISO 27001 Lead Auditor 🛡️ Security-First Approach: Proactive cybersecurity assessment and hardening 📚 Training Included: User training ensures full platform adoption ⏰ 24/7 Availability: Critical support when you need it most 📞 Clear Communication: Fluent English with regular progress updates 💡 12+ Years Experience: Deep expertise across email ecosystems Let's Build Your Secure Email Environment I offer a complimentary security and needs assessment. Message me to discuss how we can create a robust, compliant email system for your organization.

I conduct advanced cybersecurity operations across offensive security, offensive AI security, digital forensics, incident response, malware analysis, mobile forensics, network defense, and dark web intelligence, serving corporate, legal, and investigative sectors. 1. 🤖 AI Security I assess LLMs, RAG pipelines, AI agents, model integrations, and AI-enabled applications through authorized adversarial testing to uncover exploitable weaknesses before they are abused in production. Core Services: • AI reconnaissance and attack surface mapping • AI vulnerability scanning and fuzzing • Prompt injection, jailbreaking, prompt chaining, and guardrail bypass assessments • Agentic AI, model-to-model, and orchestration workflow attack simulations • AI infrastructure, plugin, API, and supply-chain security reviews • AI security testing, hardening validation, and AI incident response support Requirements: • Written authorization with defined AI testing scope • Approved access boundaries for prompts, APIs, models, agents, vector stores, and training/inference environments • Clear legal and operational approval for any adversarial AI assessment 2. 🧨 Red Teaming I simulate real-world adversary behaviour to identify critical weaknesses and strengthen security across corporate and private environments. Core Services: • Advanced phishing simulations and payload delivery • Internal and external network penetration testing • Wireless security testing (rogue APs, WPS, WPA/WPA2 weaknesses) Requirements: • Written authorization with clearly defined rules of engagement • Verified ownership or documented authorization over targeted assets 3. 🛡 DFIR – Digital Forensics & Incident Response I provide responses to cyber incidents, ensuring containment, investigation, and recovery across enterprise systems. Core Services: • Compromise assessment and root cause analysis • Timeline creation and attack vector tracing • Disk and memory acquisition (live and dead systems) • File integrity and log analysis • Lateral movement and persistence detection • Forensic reporting aligned with legal and evidentiary standards 4. 🐞 Malware Analysis & Threat Research I reverse engineer and dissect malware samples to uncover behaviour, persistence mechanisms, and threat actor infrastructure. Core Services: • Static and dynamic analysis of binaries and scripts • Payload unpacking, sandbox execution, and API behaviour monitoring • C2 tracking, backdoor analysis, and exploit identification • YARA rule creation and IOC development Tools: • FLARE VM, REMnux, Cuckoo Sandbox, IDA Pro, Ghidra, x64dbg, PEStudio 5. 📱 Data Recovery & Mobile Forensics I recover deleted, hidden, or encrypted data from mobile devices and digital storage media. Supported Sources: • Android and iOS devices • SD cards, USB drives, and hard drives • Messaging platforms such as WhatsApp, Telegram, Signal, and Messenger Core Services: • Deleted chat and message recovery • Recovery of photos, videos, and documents from local storage or cloud sync sources • Mobile backup decryption and analysis (iTunes, Google Drive, iCloud) • Forensic imaging and mobile analysis reporting Tools: • Cellebrite UFED, Magnet AXIOM Cyber, FTK 6. 🌐 Network Security I design, deploy, and monitor defensive infrastructure to strengthen visibility, segmentation, and response capability. Core Services: • pfSense firewall deployment and network segmentation • IDS/IPS implementation with Snort and Suricata • SIEM implementation with Wazuh and Splunk • VPN deployment and secure remote access • Proxy-based content filtering and monitoring 7. 🌑 Dark Web & OSINT Cyber Threat Intelligence I specialize in underground threat intelligence and OSINT-driven profiling to uncover fraud, leaks, and threat actor activity across the surface, deep, and dark web. Core Services: • Dark web marketplace and threat actor monitoring • Tracking aliases, infrastructure, and toolkit usage • Company OSINT investigations and employee attack surface mapping • Data breach hunting for leaked emails, credentials, and sensitive records • Fraud profiling involving impersonation, cybercrime campaigns, and financial scams Tools: • Recon-ng, SpiderFoot, Maltego, Shodan, Intelligence X, OnionScan, Ahmia, Tor2Web mirrors, Hunchly 8. ✍️ Cybersecurity Writing I provide fluent, technically accurate writing in both British and American English for security, forensic, and research audiences. Writing Areas: • Technical writing • eBooks and blog content • Articles